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| Preliminary Technical Data FEATURES Low Noise Voltage noise = 3.2 nV/Hz Current noise = 3 pA/Hz Wide Bandwidth (-3 dB) = 100 MHz Large Signal BW (2V p-p) = 70 MHz Slew Rate 450V/s, 2Vp-p Gain Ranges (specified) -14 to +46 dB, 0 to 60 dB Gain Scaling 50 dB/V DC Coupled Single Ended Input and Output Supplies: 3V to 12V Low power: 150 mW @ 3V General Purpose 70 MHz, DC Coupled VGA AD8336 FUNCTIONAL BLOCK DIAGRAM Preamp 12 dB (min gain) INPP INPN Rfb1 Rfb2 Rs + PrA - PRAO VGAI Outamp 34 dB + Attenuator -60 to 0 dB + VOUT - 49*R PWRA VPOS VNEG Interpolator GAIN Interface R BIAS VCOM GPOS GNEG Figure 1. AD8336 Functional Block Diagram and Pinout APPLICATIONS Industrial Process Controls High performance AGC systems I/Q signal processing Video Industrial and Medical Ultrasound Radar Receivers GENERAL DESCRIPTION The AD8336 is a low noise single ended linear-in-dB, general purpose variable gain amplifier usable as a low noise variable gain element over a large supply voltage range. For example, at 5V supplies, the part can be used for frequencies up to 70 MHz (2Vpp); the -3 dB bandwidth is 100 MHz; these values are for the lowest gain range (-14 to +46 dB). The VGA has 60 dB of gain range and is intended for a broad spectrum of applications. Excellent bandwidth uniformity is maintained across the entire range. The gain control interface provides precise linear-in-dB scaling of 50 dB/V. Since the gain control input is differential it is easy to interface the gain control voltage to a variety of external circuits as long as they are within the devices' common voltage range. The large voltage range makes the AD8336 particularly suited for industrial, medical, and for video applications. Dual supply Rev. PrA Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. operation enables gain control of negative-going pulses such as generated by photodiodes or photo-multiplier tubes. The AD8336 has an op-amp at its input which allows both inverting and non-inverting topologies and thereby a dual polarity VGA. The part can be used within the specified gain range of -14 to +46 dB by selecting the appropriate preamp gain from a minimum of 12 dB to a maximum of 26 dB. This is accomplished by simply choosing the correct feedback resistors. The part also contains a power adjust pin, PWRA, with which the quiescent power of the part can be reduced by a factor of roughly two. This is especially useful for the highest supply voltage of 12 V and at high temperatures, plus if the highest speed operation is not required. The operating temperature range is -40C to +125C. The AD8336 is available in a 16 lead LFCSP (4x4 mm). One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 (c) 2006 Analog Devices, Inc. All rights reserved. AD8336 Preliminary Technical Data TABLE OF CONTENTS AD8336--Specifications.................................................................. 3 Absolute Maximum Ratings............................................................ 5 ESD CAUTION .............................................................................5 Pin Configuration and Functional Descriptions...........................6 REVISION HISTORY Rev. PrA Rev. PrA| Page 2 of 6 Preliminary Technical Data AD8336--SPECIFICATIONS AD8336 Table 1. VS = 5 V, TA = -55 to +125C, Gain Range = -14 to +46 dB, PrA Gain = +12 dB, f = 5 MHz, CL = 5 pF, RL = 500 , PWRA = GND unless otherwise specified. Parameter GENERAL PARAMETERS -3 dB Small Signal Bandwidth -3 dB Large Signal Bandwidth Slew Rate Input Voltage Noise Input Current Noise Output-Referred Noise Output Impedance Output Signal Range Output Offset Voltage DYNAMIC PERFORMANCE Harmonic Distortion HD2 HD3 HD2 HD3 Output 1 dB Compression Point Two-Tone Intermodulation Distortion (IMD3) Conditions VOUT = 10 mV p-p VOUT = 2 V p-p VOUT = 2 V p-p Min Typ 100 70 450 3.0 TBD 600 190 1 |VSUPPLY| - 2 50 Max Unit MHz MHz V/s nV/Hz pA/Hz nV/Hz nV/Hz V mV VGAIN = 0.7 V (Gain = +46 dB) VGAIN = -0.7 V (Gain = -14 dB) DC to 10 MHz RL 500 (for |VSUPPLY| < 5V); RL 1 k above that VGAIN = 0.7 V (Gain = +46 dB) VGAIN = 0V, VOUT = 1 Vpp f = 1 MHz f = 10 MHz VGAIN = -0.7 V, f = 10 MHz VGAIN = +0.7 V, f = 10 MHz VGAIN = 0 V, VOUT = 1 Vpp, f1 = 1 MHz, f2 = 1.1 MHz VGAIN = 0, VOUT = 1 Vpp, f1 = 10 MHz, f2 = 11 MHz VGAIN = 0, VOUT = 2 Vpp, f1 = 1 MHz, f2 = 1.1 MHz VGAIN = 0, VOUT = 2 Vpp, f1 = 10 MHz, f2 = 11 MHz VGAIN = 0, VOUT = 1 Vpp, f = 1 MHz VGAIN = 0, VOUT = 1 Vpp, f = 10 MHz VGAIN = 0, VOUT = 2 Vpp, f = 1 MHz VGAIN = 0, VOUT = 2 Vpp, f = 10 MHz VGAIN = 0.7 V, VIN = TBD mV p-p 1 MHz < f < 10 MHz, Full Gain Range -0.7 V < VGAIN < -0.6V -0.6 V < VGAIN < 0.6 V 0.6 V < VGAIN < 0.7V -0.6 V < VGAIN < 0.6 V, over temperature Min Max Output Third Order Intercept Overload Recovery Group Delay Variation ACCURACY Absolute Gain Error2 TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD 3 Min Min Min N/A TBD 0.3 TBD N/A 50 60 TBD TBD 3 Min 12 Max Max Max Max N/A dBc dBc dBc dBc dBm1 dBm dBc dBc dBc dBc dBm dBm dBm dBm ns ns dB dB dB dB dB/V dB V M ns V mA mW dB Gain Law Conformance3 GAIN CONTROL INTERFACE Gain Scaling Factor Gain Range Input Voltage (VGAIN) Range Input Impedance Response Time POWER SUPPLY Supply Voltage Operating Range Quiescent Current Power Dissipation PSRR 1 2 No foldover 60 dB Gain Change Min -VS Max +VS Vsupply between 3 V and 5 V Vsupply = 3 V VGAIN = 0.7 V, f = 10 MHz 25 150 TBD All dBm values are calculated with 50 reference, unless otherwise noted. Conformance to theoretical gain expression (see Equation 1). 3 Conformance to best fit dB linear curve. Rev. PrA | Page 3 of 6 AD8336 Parameter Quiescent Current Power Dissipation PSRR Conditions Vsupply = 12 V Vsupply = 12 V VGAIN = 0.7 V, f = 10 MHz Preliminary Technical Data Min Typ 28 670 TBD Max Unit mA mW dB Rev. PrA | Page 4 of 6 Preliminary Technical Data ABSOLUTE MAXIMUM RATINGS Table 2. Absolute Maximum Ratings Parameter Voltage Supply Voltage (VPOS, VNEG) Input Voltage (INPx) GAIN Voltage Power Dissipation Temperature Operating Temperature Storage Temperature Lead Temperature (Soldering 60 sec) JA 16-LFCSP (4 x 4 mm) Package4 4 AD8336 Rating 13V TBD V VPOS, VNEG TBD W -40C to +125C -65C to +150C 300C 58C/W Stresses above those listed under the Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Four-Layer JEDEC Board (2S2P). ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Rev. PrA | Page 5 of 6 AD8336 PIN CONFIGURATION AND FUNCTIONAL DESCRIPTIONS 13 VPOS 16 NC 15 NC 14 NC Preliminary Technical Data VOUT PWRA VCOM INPP 1 2 3 4 12 GNEG 11 GPOS 10 VNEG 9 VGAI AD8336 Top View (not to scale) 5 6 7 NC INPN NC Figure 1. 16 LFCSP Table 3. Pin Function Descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Mnemonic VOUT PWRA VCOM INPP INPN NC NC PRAO VGAI VNEG GPOS GNEG VPOS NC NC NC Function Output Voltage Power Control, allows quiescent power to be reduced by a factor-of-two Commom-Mode Voltage (Normally GND when using a dual supply) Positive Input to Preamp Negative Input to Preamp No Connect No Connect Preamp Output VGA Input Negative Supply Positive Gain Control Input Negative Gain Control Input Positive Supply No Connect No Connect No Connect Rev. PrA | Page 6 of 6 PRAO 8 PR06228-0-6/06(PrA) Pin 1 Identifier |
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