View MAX2037_2064356.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

general description the MAX2037 8-channel variable-gain amplifier (vga) is designed for high linearity, high dynamic range, and low-noise performance targeting ultrasound imaging and doppler applications. each amplifier features dif- ferential inputs and outputs and a total gain range of typically 42db. in addition, the vgas offer very low out- put-referred noise performance suitable for interfacing with 12-bit adcs. the MAX2037 vga is optimized for less than ?.25db absolute gain error to ensure minimal channel-to-chan- nel ultrasound beamforming focus error. the device? differential outputs are designed to directly drive ultra- sound adcs through an external passive anti-aliasing filter. a switchable clamp is also provided at each ampli- fier? outputs to limit the output signals, thereby prevent- ing adc overdrive or saturation. dynamic performance of the device is optimized to reduce distortion to support second-harmonic imaging. the device achieves a second-harmonic distortion specification of -70dbc at v out = 1.5v p-p and f in = 5mhz, and an ultrasound-specific* two-tone third-order intermodulation distortion specification of -52dbc at v out = 1.5v p-p and f in = 5mhz. the MAX2037 operates from a +5.0v power supply, consuming only 120mw/channel. the device is avail- able in a 100-pin tqfp package with an exposed pad- dle. electrical performance is guaranteed over a 0 c to +70 c temperature range. applications ultrasound imaging sonar features ? 8-channel configuration ? high integration for ultrasound imaging applications ? pin compatible with the max2038 ultrasound vga plus cw doppler beamformer ? maximum gain, gain range, and output-referred noise optimized for interfacing with 12-bit adcs maximum gain of 29.5db total gain range of 42db 22nv/ h h z z ultra-low output-referred noise at 5mhz pin-for-pin 10-bit compatibility supported by max2035/max2036 ? 0.25db absolute gain error ? switchable output vga clamp eliminating adc overdrive ? fully differential vga outputs for direct adc drive ? variable gain range achieves 42db dynamic range ? -70dbc hd2 at v out = 1.5v p-p and f in = 5mhz ? two-tone ultrasound-specific* imd3 of -52dbc at v out = 1.5v p-p and f in = 5mhz ? 120mw consumption per channel * see the ultrasound-specific imd3 specification in the applications information section. MAX2037 ultrasound variable-gain amplifier ________________________________________________________________ maxim integrated products 1 ordering information 19-0586; rev 0; 10/06 for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ? ep = exposed paddle. + denotes lead-free package. t = tape-and-reel package. d = dry packing. evaluation kit available part temp range pin-package pkg code MAX2037ccq-d 0 c to +70 c 100 tqfp-ep ? (14mm x 14mm) c100e-3 MAX2037ccq-td 0 c to +70 c 100 tqfp-ep ? (14mm x 14mm) c100e-3 MAX2037ccq+d 0 c to +70 c 100 tqfp-ep ? (14mm x 14mm) c100e-3 m ax 2037c c q + td 0 c to +70 c 100 tqfp-ep ? (14mm x 14mm) c100e-3 functional diagram MAX2037 bias circuitry gnd ext_res v cc v ref pd vg_ctl+ vg_ctl- vg_clamp_mode vg_out1+ vg_out1- vg_out8+ vg_out8- vg_in1+ vg_in1- vg_in8+ vg_in8- -12.5db to +29.5db vga 50 50 vga 50 50
MAX2037 ultrasound variable-gain amplifier 2 _______________________________________________________________________________________ absolute maximum ratings dc electrical characteristics (figure 2, v cc = v ref = 4.75v to 5.25v, t a = 0 c to +70 c, gnd = 0v, pd = 0, no rf signals applied, capacitance to gnd at each of the vga differential outputs is 60pf, differential capacitance across the vga outputs is 10pf, r l = 1k . typical values are at v cc = v ref = 5v, t a = +25 c, unless otherwise noted.) (note 1) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. v cc , v ref to gnd .................................................-0.3v to +5.5v any other pins to gnd...............................-0.3v to (v cc + 0.3v) vga differential input voltage (vgin_+ - vgin_-)...........8.0v p-p analog gain-control input differential voltage (vg_ctl+ - vg_ctl-)...................................................8.0v p-p continuous power dissipation (t a = +70?) 100-pin tqfp (derated 45.5mw/? above +70?).........................3636.4mw operating temperature range...............................0? to +70? junction temperature ......................................................+150? jc ...................................................................................+2?/w ja .................................................................................+22?/w storage temperature range .............................-40? to +150? lead temperature (soldering, 10s) .................................+300? parameter symbol condtions min typ max units supply voltage range v cc 4.75 5 5.25 v v cc external reference voltage range v ref (note 2) 4.75 5 5.25 v pd = 0 204 231 total power supply current refers to v cc supply current plus v ref current pd =1 27 33 ma v cc supply current i vcc 192 216 ma v ref current i ref 12 15 ma current consumption per amplifier channel refers to v cc supply current 24 27 ma minimum gain +2 differential analog control voltage range maximum gain -2 v p-p differential analog control common-mode voltage v cm 2.85 3.0 3.15 v analog control input source/sink current 4.5 5 ma logic inputs cmos input high voltage v ih 2.0 v cmos input low voltage v il 0.8 v
MAX2037 ultrasound variable-gain amplifier _______________________________________________________________________________________ 3 ac electrical characteristics (figure 2, v cc = v ref = 4.75v to 5.25v, v cm = 2.85v to 3.15v, t a = 0 c to +70 c, gnd = 0v, pd = 0, vg_clamp_mode = 1, f rf = 5mhz, capacitance to gnd at each of the vga differential outputs is 60pf, differential capacitance across the vga outputs is 10 pf, r l = 1k . typical values are at v cc = v ref = 5v, t a = +25 c, unless otherwise noted.) (note 1) parameter symbol conditions min typ max units differential output capacitance is 10pf, capacitance to gnd at each single-ended output is 60pf, r l = 1k 18 full-scale bandwidth f -1.3db v out = 1.5v p-p , 1.3db bandwidth, gain = 10db no capacitive load r l = 1k 29 mhz small signal bandwidth f -1.3db v out = 1.5mv p-p , 3db bandwidth, gain = 10db 30 mhz differential input resistance r in 170 200 230 input effective capacitance c in f rf = 10mhz, each input to ground 15 pf differential output resistance r out 100 maximum gain +29.5 db minimum gain -12.5 db gain range 42 db absolute gain error t a = +25 c, full gain range 0% to 100% ?.25 ?.0 db vga gain response time 40db gain change to within 1db final value 1 ? input-referred noise vg_ctl set for maximum gain, no input signal 2 nv/ hz no input signal 22 output-referred noise vg_ctl set for +10db of gain v out = 1.5v p-p , 1khz offset 55 nv/ hz vg_clamp_mode = 1, vg_ctl set for +10db of gain, f rf = 5mhz, v out = 1.5v p-p -70 second harmonic hd2 vg_clamp_mode = 1, vg_ctl set for +10db of gain, f rf = 10mhz, v out = 1.5v p-p -55 -65 dbc third-order intermodulation distortion imd3 vg_clt set for +10db of gain, f rf1 = 5mhz, f rf2 = 5.01mhz, v out = 1.5v p-p (note 3) -40 -52 db
MAX2037 ultrasound variable-gain amplifier 4 _______________________________________________________________________________________ typical operating characteristics (figure 2, v cc = v ref = 4.75v to 5.25v, gnd = 0v, pd = 0, vg_clamp_mode = 1, f rf = 5mhz, capacitance to gnd at each of the vga differential outputs is 60pf, differential capacitance across the vga outputs is 10pf, r l = 1k , t a = 0 c to +70 c. typical values are at v cc = v ref = 5v, t a = +25 c, unless otherwise noted.) 0 1.0 0.5 2.0 1.5 3.0 2.5 3.5 4.5 4.0 5.0 0 5.0 7.5 2.5 10.0 12.5 15.0 17.5 20.0 overdrive phase delay vs. frequency MAX2037toc01 frequency (mhz) overdrive phase delay (ns) v in1 = 35mv p-p differential v in2 = 87.5mv p-p differential gain = 20db -100 -90 -80 -70 -60 -50 -40 075 50 25 100 125 150 175 200 power supply modulation ratio MAX2037 toc02 frequency (khz) psmr (dbc) v out = 1.5v p-p differential v mod = 50mv p-p , f carrier = 5mhz, gain = 10db -80 -70 -60 -50 -40 -30 -20 -10 0 -15 -5 5 15 25 35 two-tone ultrasound-specific imd3 vs. gain MAX2037toc03 gain (db) imd3 (dbc) v out = 1v p-p differential f = 10mhz f = 2mhz f = 5mhz note 1: specifications at t a = +25? and t a = +70? are guaranteed by production test. specifications at t a = 0? are guaranteed by design and characterization. note 2: noise performance of the device is dependent on the noise contribution from the supply to v ref . use a low noise supply for v ref . v cc and v ref can be connected together to share the same supply voltage if the supply for v cc exhibits low noise. note 3: see the ultrasound-specific imd3 specification in the applications information section. ac electrical characteristics (continued) (figure 2, v cc = v ref = 4.75v to 5.25v, v cm = 2.85v to 3.15v, t a = 0 c to +70 c, gnd = 0v, pd = 0, vg_clamp_mode = 1, f rf = 5mhz, capacitance to gnd at each of the vga differential outputs is 60pf, differential capacitance across the vga outputs is 10 pf, r l = 1k . typical values are at v cc = v ref = 5v, t a = +25 c, unless otherwise noted.) (note 1) parameter symbol conditions min typ max units channel-to-channel crosstalk v out = 1v p-p differential, f rf = 10mhz, vg_ctl set for +10db of gain -80 db maximum output voltage at clamp on vg_clamp_mode = 0, vg_ctl set for +20db of gain, 350mv p-p differential input 2.4 v p-p d i ffer enti al maximum output voltage at clamp off vg_clamp_mode = 1, vg_ctl set for +20db of gain, 350mv p-p differential input 2.8 v p-p d i ffer enti al
MAX2037 ultrasound variable-gain amplifier _______________________________________________________________________________________ 5 overload recovery time MAX2037toc07 differential output 2.0v/div differential input 2.0v/div 400ns/div f = 5mhz output 100mv p-p to overload and back to 100mv p-p -100 -90 -95 -80 -85 -75 -65 -70 -60 -15 5 -5 15 25 35 channel-to-channel crosstalk vs. gain MAX2037toc08 gain (db) crosstalk (db) v out = 1.5v p-p differential f = 10mhz, adjacent channels -30 -110 110100 channel-to-channel crosstalk vs. frequency -90 -100 MAX2037toc10 frequency (mhz) crosstalk (db) -70 -80 -60 -50 -40 v out = 1v p-p differential gain = 10db, adjacent channels typical operating characteristics (continued) (figure 2, v cc = v ref = 4.75v to 5.25v, gnd = 0v, pd = 0, vg_clamp_mode = 1, f rf = 5mhz, capacitance to gnd at each of the vga differential outputs is 60pf, differential capacitance across the vga outputs is 10pf, r l = 1k , t a = 0 c to +70 c. typical values are at v cc = v ref = 5v, t a = +25 c, unless otherwise noted.) -100 -80 -90 -60 -70 -40 -50 -30 -10 -20 0 -15 5 -5 15 25 35 second harmonic distortion vs. gain MAX2037toc04 gain (db) hd2 (dbc) v out = 1v p-p differential f = 12mhz f = 2mhz f = 5mhz -100 -80 -90 -60 -70 -40 -50 -30 -10 -20 0 -15 5 -5 15 25 35 third harmonic distortion vs. gain MAX2037toc05 gain (db) hd3 (dbc) v out = 1v p-p differential f = 12mhz f = 2mhz f = 5mhz overload recovery time MAX2037toc06 differential output 1.0v/div differential input 1.0v/div 400ns/div f = 5mhz output 1v p-p to overload and back to 1v p-p
MAX2037 ultrasound variable-gain amplifier 6 _______________________________________________________________________________________ 30 25 20 15 10 5 0 -5 -10 0.1 10 100 1 1000 large-signal bandwidth vs. frequency MAX2037toc13b frequency (mhz) gain (db) v out = 1.5v p-p differential vg_ctl = -1v p-p differential 20 15 10 5 0 -5 -10 -15 -20 0.1 10 100 1 1000 large-signal bandwidth vs. frequency MAX2037toc13c frequency (mhz) gain (db) v out = 1.5v p-p differential vg_ctl = +0.6v p-p differential 10 5 0 -5 -10 -15 -20 -25 -30 0.1 10 100 1 1000 large-signal bandwidth vs. frequency MAX2037toc13d frequency (mhz) gain (db) v out = 1.5v p-p differential vg_ctl = +1.5v p-p 5 0 -5 -10 -15 -20 -25 -30 -35 0.1 10 100 1 1000 large-signal bandwidth vs. frequency MAX2037toc13e frequency (mhz) gain (db) v out = 1v p-p differential vg_ctl = +1.7v p-p differential 0 -5 -10 -15 -20 -25 -30 -35 -40 0.1 10 100 1 1000 large-signal bandwidth vs. frequency MAX2037toc13f frequency (mhz) gain (db) v out = 0.5v p-p differential vg_ctl = +2v p-p differential -100 -80 -90 -60 -70 -40 -50 -30 -10 -20 0 01.5 0.5 1.0 2.0 2.5 3.0 harmonic distortion vs. differential output voltage MAX2037toc14 differential output voltage (v p-p ) harmonic distortion (dbc) third harmonic second harmonic v out = 1v p-p differential f = 5mhz, gain = 10db typical operating characteristics (continued) (figure 2, v cc = v ref = 4.75v to 5.25v, gnd = 0v, pd = 0, vg_clamp_mode = 1, f rf = 5mhz, capacitance to gnd at each of the vga differential outputs is 60pf, differential capacitance across the vga outputs is 10pf, r l = 1k , t a = 0 c to +70 c. typical values are at v cc = v ref = 5v, t a = +25 c, unless otherwise noted.) 0 10 20 30 40 50 -15 5 -5 15 25 35 output-referred noise voltage vs. gain MAX2037toc11 gain (db) f = 5mhz output-referred noise voltage (nv/ hz) -25 -5 -15 15 5 25 35 -2.5 -0.5 -1.5 0.5 1.5 2.5 gain vs. differential analog control voltage (vg_ctl) MAX2037toc12 vg_ctl (v p-p differential) f = 5mhz gain (db) 40 35 30 25 20 15 10 5 0 0.1 10 100 1 1000 large-signal bandwidth vs. frequency MAX2037toc13a frequency (mhz) gain (db) v out = 1.5v p-p differential vg_ctl = -2v p-p differential
MAX2037 ultrasound variable-gain amplifier _______________________________________________________________________________________ 7 -70 -60 -50 -40 -10 -20 -30 0 015 510 2025 two-tone ultrasound-specific imd3 vs. frequency MAX2037toc18 frequency (mhz) imd3 (dbc) v out = 1v p-p differential gain = 10db 0 20 15 50 10 5 25 30 35 40 45 0.40 -0.40 -0.35 -0.30 -0.25 -0.20 -0.15 -0.10 -0.05 0.05 0.10 0.15 0.20 0.25 0.30 0.35 gain error histogram MAX2037 toc19 gain error (db) % of units sample size = 202 units, f in_ = 5mhz, gain = 10db -20 -10 -15 0 -5 10 5 15 20 -15 5 -5 15 25 35 output common-mode offset voltage vs. gain MAX2037toc20 gain (db) offset voltage (mv) 0.1 10 100 differential output impedance magnitude vs. frequency max203toc21 frequency (mhz) | z out | 1 200 60 80 100 120 140 180 160 -100 -90 -95 -80 -85 -70 -75 -65 -50 -60 -45 -55 -40 200 1100 500 800 1400 1700 2000 harmonic distortion vs. differential output load resistance MAX2037toc15 differential output load ( ) harmonic distortion (dbc) third harmonic second harmonic v out = 1v p-p differential f = 5mhz, gain = 10db -100 -90 -95 -80 -85 -70 -75 -65 -45 -50 -55 -60 -40 565 25 45 85 105 harmonic distortion vs. differential output load capacitance MAX2037toc16 differential output load (pf) harmonic distortion (dbc) third harmonic second harmonic v out = 1v p-p differential f = 5mhz, gain = 10db -100 -80 -90 -60 -70 -40 -50 -30 -10 -20 0 020 10 30 40 50 harmonic distortion vs. frequency MAX2037toc17 frequency (mhz) harmonic distortion (dbc) v out = 1v p-p differential gain = 10db third harmonic second harmonic typical operating characteristics (continued) (figure 2, v cc = v ref = 4.75v to 5.25v, gnd = 0v, pd = 0, vg_clamp_mode = 1, f rf = 5mhz, capacitance to gnd at each of the vga differential outputs is 60pf, differential capacitance across the vga outputs is 10pf, r l = 1k , t a = 0 c to +70 c. typical values are at v cc = v ref = 5v, t a = +25 c, unless otherwise noted.)
MAX2037 ultrasound variable-gain amplifier 8 _______________________________________________________________________________________ pin description pin name function 1, 2, 5, 6, 7, 10, 11, 12, 19, 20, 21, 24, 25, 26, 29, 30, 31, 34, 35, 36, 41, 43, 44, 45, 47, 48, 51, 55, 58, 59, 64, 65, 66, 69, 73, 76, 79, 80, 81, 83, 84, 85, 88?2, 96, 97, 98 gnd ground 3 vgin3- vga channel 3 inverting differential input 4 vgin3+ vga channel 3 noninverting differential input 8 vgin4- vga channel 4 inverting differential input 9 vgin4+ vga channel 4 noninverting differential input 13 ext_c1 external compensation. connect a 4.7? capacitor to ground. 14 ext_c2 external compensation. connect a 4.7? capacitor to ground. 15 ext_c3 external compensation. connect a 4.7? capacitor to ground. 16, 39, 42, 46, 54, 72, 82, 87 v cc 5v power supply. bypass each v cc supply to ground with 0.1? capacitors as close to the pins as possible. 17 vgin5- vga channel 5 inverting differential input 18 vgin5+ vga channel 5 noninverting differential input 22 vgin6- vga channel 6 inverting differential input 23 vgin6+ vga channel 6 noninverting differential input 27 vgin7- vga channel 7 inverting differential input 28 vgin7+ vga channel 7 noninverting differential input 32 vgin8- vga channel 8 inverting differential input 33 vgin8+ vga channel 8 noninverting differential input 37, 93 v ref 5v reference supply. bypass to gnd with a 0.1? capacitor as close to the pins as possible. note that noise performance of the device is dependent on the noise contribution from the supply to v ref . use a low noise supply for v ref . v cc and v ref can be connected together to share the same supply voltage if the supply for v cc exhibits low noise. 38 ext_res external resistor. connect a 7.5k resistor to ground. 40 pd power-down switch. drive pd high to set the device in power-down mode. drive pd low for normal operation. 49 vgout8+ vga channel 8 noninverting differential output 50 vgout8- vga channel 8 inverting differential output 52 vgout7+ vga channel 7 noninverting differential output 53 vgout7- vga channel 7 inverting differential output 56 vgout6+ vga channel 6 noninverting differential output 57 vgout6- vga channel 6 inverting differential output 60 vgout5+ vga channel 5 noninverting differential output
MAX2037 ultrasound variable-gain amplifier _______________________________________________________________________________________ 9 pin description (continued) pin name function 61 vgout5- vga channel 5 inverting differential output 62 vg_ctl- vga analog gain-control inverting input 63 vg_ctl+ vga analog gain-control noninverting input 67 vgout4+ vga channel 4 noninverting differential output 68 vgout4- vga channel 4 inverting differential output 70 vgout3+ vga channel 3 noninverting differential output 71 vgout3- vga channel 3 inverting differential output 74 vgout2+ vga channel 2 noninverting differential output 75 vgout2- vga channel 2 inverting differential output 77 vgout1+ vga channel 1 noninverting differential output 78 vgout1- vga channel 1 inverting differential output 86 v g_c lamp _m od e v ga c l am p m od e e nab l e. d r i ve v g _c lam p _m od e l ow to enab l e v ga cl am p i ng . v g a outp ut w i l l b e cl am p ed at typ i cal l y 2.4v p - p d i ffer enti al . d r i ve v g_c lam p _m o d e hi g h to d i sab l e v g a cl am p m od e. 94 vgin1- vga channel 1 inverting differential input 95 vgin1+ vga channel 1 noninverting differential input 99 vgin2- vga channel 2 inverting differential input 100 vgin2+ vga channel 2 noninverting differential input ep exposed paddle. solder the exposed paddle to the ground plane using multiple vias. detailed description the MAX2037? vgas are optimized for high linearity, high dynamic range, and low output noise perfor- mance, making this component ideal for ultrasound- imaging applications. the vga paths also exhibit a channel-to-channel crosstalk of -80db at 10mhz and an absolute gain error of less than ?.25db for minimal channel-to-channel focusing error in an ultrasound sys- tem. each vga path includes circuitry for adjusting analog gain, an output buffer with differential output ports (vgout_+, vgout_-) for driving adcs, and dif- ferential input ports (vgin_+, vgin_-) that are ideal for directly interfacing to the max2034 quad lna. see the functional diagram for details. the vga has an adjustable gain range from -12.5db to +29.5db, achieving a total dynamic range of typically 42db. the vga gain can be adjusted with the differen- tial gain-control input vg_ctl+ and vg_ctl-. set the differential gain-control input voltage at -2v for maxi- mum gain and +2v for minimum gain. the differential analog control common-mode voltage is typically 3.0v. vga clamp a clamp is provided to limit the vga output signals to avoid overdriving the adc or to prevent adc satura- tion. set vg_clamp_mode low to clamp the vga dif- ferential outputs at 2.4v p-p . set the vg_clamp_mode high to disable the clamp. power down the device can also be powered down with pd. set pd to logic-high for power-down mode. in power-down mode, the device draws a total supply current of 27ma. set pd to a logic-low for normal operation overload recovery the device is also optimized for quick overload recov- ery for operation under the large input signal conditions that are typically found in ultrasound input buffer imag- ing applications. see the typical operating characteristics for an illustration of the rapid recovery time from a transmit-related overload.
applications information external compensation external compensation is required for bypassing inter- nal biasing circuitry. connect, as close as possible, individual 4.7? capacitors from each pin ext_c1, ext_c2, and ext_c3 (pin 13, 14, 15) to ground. external bias resistor an external resistor at ext_res is required to set the bias for the internal biasing circuitry. connect, as close as possible, a 7.5k resistor from ext_res (pin 38) to ground. analog input and output coupling in typical applications, the MAX2037 is being driven from a low-noise amplifier (such as the max2034) and is typically driving a discrete differential anti-alias filter into an adc (such as the max1436 octal adc). the differential input impedance of the MAX2037 is typically 200 . the differential outputs are capable of driving a differential load resistance of 1000 . the output impedance is 100 differential. the differential outputs have a common-mode bias of approximately 3.0v. ac- couple these differential outputs if the next stage has a different common-mode input range. ultrasound-specific imd3 specification unlike typical communications specs, the two input tones are not equal in magnitude for the ultrasound- specific imd3 two-tone specification. in this measure- ment, f 1 represents reflections from tissue and f 2 represents reflections from blood. the latter reflections are typically 25db lower in magnitude, and hence the measurement is defined with one input tone 25db lower than the other. the imd3 product of interest (f 1 - (f 2 - f 1 )) presents itself as an undesired doppler error signal in ultrasound applications. see figure 1. board layout the pin configuration of the MAX2037 is optimized to facilitate a very compact physical layout of the device and its associated discrete components. a typical application for this device might incorporate several devices in close proximity to handle multiple channels of signal processing. the exposed paddle (ep) of the MAX2037? tqfp-ep package provides a low thermal-resistance path to the die. it is important that the pc board on which the MAX2037 is mounted be designed to conduct heat from the ep. in addition, provide the ep with a low- inductance path to electrical ground. the ep must be soldered to a ground plane on the pcb, either directly or through an array of plated via holes. MAX2037 ultrasound variable-gain amplifier 10 ______________________________________________________________________________________ -25db ultrasound imd3 f 1 - (f 2 - f 1 )f 2 + (f 2 - f 1 ) f 1 f 2 figure 1. ultrasound imd3 measurement technique
MAX2037 ultrasound variable-gain amplifier ______________________________________________________________________________________ 11 MAX2037 max2034 max1436 adc vg_ctl+ vg_ctl- vg_out_+ vg_out_- vgin_+ vgin_- single channel single channel vga 50 100nf z in control d2, d1, d0 to a single channel of 100nf 50 100nf 100nf 100nf 18nf 100nf v in -v +v figure 2. typical per-channel ultrasound-imaging application vgout8- vgout8+ gnd v cc gnd v cc gnd 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 gnd gnd gnd gnd v cc ext_res gnd gnd v ref gnd pd vgin8- gnd vgin7+ vgin7- gnd gnd vgin8+ vgout1- gnd gnd v cc gnd gnd vgin2+ vgout1+ gnd 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 gnd gnd gnd vgin4+ gnd vgin3+ vgin3- gnd gnd vgout2+ gnd v cc vgout3- vgout3+ gnd vgout4- vgout4+ gnd gnd gnd vg_ctl+ vg_ctl- vgout5- gnd gnd vgout6- vgout6+ gnd v cc vgout7- vgout7+ gnd vgout2- MAX2037 top view gnd vg_clamp_mode v cc gnd gnd gnd gnd gnd gnd v ref vgin1- vgin1+ gnd gnd vgin2- gnd ext_c1 ext_c2 ext_c3 vgin5- gnd gnd gnd v cc gnd gnd vgin6- gnd gnd vgin5+ vgin6+ vgin4- vgout5+ tqfp pin configuration
MAX2037 ultrasound variable-gain amplifier maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2006 maxim integrated products is a registered trademark of maxim integrated products, inc. package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation go to www.maxim-ic.com/packages .) 100l,tqfp.eps package outline 21-0085 2 1 b 100l tqfp, 14x14x1.0mm package outline, 21-0085 2 2 b 100l tqfp, 14x14x1.0mm

▲Up To Search▲

Price & Availability of MAX2037

	To Download MAX2037 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .