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LT1884/LT1885 Dual/Quad Rail-to-Rail Output, Picoamp Input Precision Op Amps
FEATURES
s s s s s s s s s
DESCRIPTIO
Offset Voltage: 50V Max (LT1884A) Input Bias Current: 400pA Max (LT1884A) Offset Voltage Drift: 0.8V/C Max Rail-to-Rail Output Swing Operates with Single or Split Supplies Open-Loop Voltage Gain: 1 Million Min 1mA Maximum Supply Current Per Amplifier Slew Rate: 1V/s Standard Pinouts
The LT(R)1884/LT1885 op amps bring high accuracy input performance to amplifiers with rail-to-rail output swing while providing faster response than other precision amplifiers. Input offset voltage is trimmed to less than 50V and the low drift maintains this accuracy over the operating temperature range. Input bias currents are an ultralow 400pA maximum. The amplifiers work on any total power supply voltage between 2.7V and 36V (fully specified from 5V to 15V). Output voltage swings to within 40mV of the negative supply and 220mV of the positive supply make these amplifiers good choices for low voltage single supply operation. Slew rates of 1V/s with a supply current of less than 1mA per amplifier give superior response and settling time performance in a low power precision amplifier. The dual LT1884 is available with standard pinouts in 8-pin SO and PDIP packages. The quad LT1885 is also in the standard pinout 14-pin SO package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s s s s s s s
Thermocouple Amplifiers Bridge Transducer Conditioners Instrumentation Amplifiers Battery-Powered Systems Photo Current Amplifiers Precision Integrators Precision Current Sources
TYPICAL APPLICATIO
-IN
Input Fault Protected Instrumentation Amplifier
1M 10pF 3
+
1/4 LT1885
10k
10k
-
RG/2 10k
-
1/4 LT1885 OUT
+
GUARD 1/4 LT1885 RG/2 10k
+
GAIN = 10k 9.76k 500 TRIM FIRST FOR DC CMRR
1884 TA01
- -
1M +IN 22pF TRIM FOR AC CMRR 1/4 LT1885 5
+
U
2*10k RG
U
U
1
LT1884/LT1885
ABSOLUTE
AXI U
RATI GS
Supply Voltage (V + to V -) ....................................... 40V Differential Input Voltage (Note 2) ......................... 10V Input Voltage .................................................... V + to V - Input Current (Note 2) ........................................ 10mA Output Short-Circuit Duration (Note 3) ............ Indefinite
PACKAGE/ORDER I FOR ATIO
ORDER PART NUMBER
TOP VIEW OUT A 1 -IN A 2 A +IN A 3 V- 4 N8 PACKAGE 8-LEAD PDIP B 6 5 -IN B +IN B 8 7 V
+
OUT B
S8 PACKAGE 8-LEAD PLASTIC SO
TJMAX = 150C, JA = 130C/W (N8) TJMAX = 150C, JA = 190C/W (S8)
LT1884CN8 LT1884CS8 LT1884ACN8 LT1884ACS8 LT1884IN8 LT1884IS8 LT1884AIN8 LT1884AIS8 S8 PART MARKING 1884 1884A 1884I 1884AI
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. Single supply operation VEE = 0, VCC = 5V; VCM = VCC/2 unless otherwise noted. (Note 5)
SYMBOL VOS PARAMETER Input Offset Voltage (LT1884A) 0C < TA < 70C - 40C < TA < 85C Input Offset Voltage (LT1884/LT1885) 0C < TA < 70C - 40C < TA < 85C Input Offset Voltage Drift (Note 6) IOS Input Offset Current (LT1884A) 0C < TA < 70C - 40C < TA < 85C Input Offset Current (LT1884/LT1885) 0C < TA < 70C - 40C < TA < 85C
q q q q q q q q q q
CONDITIONS
0C < TA < 70C - 40C < TA < 85C
2
U
U
W
WW U
W
(Note 1)
Operating Temperature Range (Note 4) .. - 40C to 85C Specified Temperature Range (Note 5) ... - 40C to 85C Maximum Junction Temperature .......................... 150C Storage Temperature Range ................. - 65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C
ORDER PART NUMBER
TOP VIEW OUT A 1 - IN A 2 +IN A 3 V+ 4 14 OUT D
A
13 -IN D
LT1885CS LT1885IS
D
12 +IN D 11 V -
+IN B 5 -IN B 6 OUT B 7
B
C
10 +IN C 9 8
-IN C OUT C
S PACKAGE 14-LEAD PLASTIC SO
TJMAX = 150C, JA = 110C/W
MIN
TYP 25
MAX 50 85 110 80 125 150 0.8 0.8 300 400 500 900 1200 1400
UNITS V V V V V V V/C V/C pA pA pA pA pA pA
30
0.3 0.3 100
150
LT1884/LT1885
The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. Single supply operation VEE = 0, VCC = 5V; VCM = VCC/2 unless otherwise noted. (Note 5)
SYMBOL IB PARAMETER Input Bias Current (LT1884A) 0C < TA < 70C - 40C < TA < 85C Input Bias Current (LT1884/LT1885) 0C < TA < 70C - 40C < TA < 85C Input Noise Voltage en in VCM CMRR PSRR AVOL Input Noise Voltage Density Input Noise Current Density Input Voltage Range
q q q q q
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
TYP 100
MAX 400 500 600 900 1200 1400
UNITS pA pA pA pA pA pA VP-P nV/Hz pA/Hz
150
0.1Hz to 10Hz f = 1kHz f = 1kHz VEE + 1.0 VEE + 1.2 108 106 108 500 350 400 300 300 200
0.4 9.5 0.05 VCC - 1.0 VCC - 1.2 128 132 2.4 1600 800 400 20 25 70 270 120 130 180 360 0.45
q
V V dB dB dB
Common Mode Rejection Ratio Power Supply Rejection Ratio Minimum Operating Supply Voltage Large-Signal Voltage Gain
1V < VCM < 4V 1.2V < VCM < 3.8V VEE = 0, VCM = 1.5V; 2.7V < VCC < 32V RL = 10k; 1V < VOUT < 4V
q q q q
2.7
V V/mV V/mV V/mV V/mV V/mV V/mV
RL = 2k; 1V < VOUT < 4V
q
RL = 1k; 1V < VOUT < 4V
q
VOL
Output Voltage Swing Low
No Load ISINK = 100A ISINK = 1mA ISINK = 5mA No Load ISOURCE = 100A ISOURCE = 1mA ISOURCE = 5mA VCC = 3V VCC = 5V
q q q q q q q q
40 50 150 600 220 230 300 600 0.85 1.30 0.9 1.4 1.0 1.5
mV mV mV mV mV mV mV mV mA mA mA mA mA mA mA mA MHz s V/s V/s V/s V/s
VOH
Output Voltage Swing High (Referred to VCC)
IS
Supply Current per Amplifier
0.65 0.65 0.70 30 30 2 10
0.50
q
VCC = 12V
q
0.50
q q
ISC GBW tS SR + SR -
Short-Circuit Current Gain-Bandwidth Product Settling Time Positive Slew Rate Negative Slew Rate
VOUT Short to GND VOUT Short to VCC f = 20kHz 0.01%, VOUT = 1.5V to 3.5V, AV = -1, RL = 2k AV = - 1
15 15 1.2
q
0.45 0.36 0.35 0.25
0.9 0.7
AV = - 1
q
3
LT1884/LT1885
The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. Single supply operation VEE = 0, VCC = 5V; VCM = VCC/2 unless otherwise noted. (Note 5)
SYMBOL VOS PARAMETER Offset Voltage Match (LT1884A) 0C < TA < 70C - 40C < TA < 85C Offset Voltage Match (LT1884/LT1885) (Note 7) 0C < TA < 70C - 40C < TA < 85C (Notes 6, 7) 0C < TA < 70C - 40C < TA < 85C (Notes 7, 9) 0C < TA < 70C - 40C < TA < 85C (Notes 7, 9) VEE = 0V, VCM = 1.5V, 2.7V < VCC < 32V, (Notes 7, 9)
q q
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
TYP 30
MAX 70 125 160 125 195 235 1.2 600 700 850 1200 1600 1900
UNITS V V V V V V V/C pA pA pA pA pA pA dB dB
35
q q q q q
Offset Voltage Match Drift IB+ Noninverting Bias Current Match (LT1884A) Noninverting Bias Current Match (LT1884/LT1885) CMRR PSRR Common Mode Rejection Match Positive Power Supply Rejection Match
0.4 200
250
q q q q
104 104
125 126
The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. Split supply operation VS = 15V; VCM = 0V unless otherwise noted. (Note 5)
SYMBOL VOS PARAMETER Input Offset Voltage (LT1884A) 0C < TA < 70C - 40C < TA < 85C Input Offset Voltage (LT1884/LT1885) 0C < TA < 70C - 40C < TA < 85C Input Offset Voltage Drift (Note 6) IOS Input Offset Current (LT1884A) 0C < TA < 70C - 40C < TA < 85C Input Offset Current (LT1884/LT1885) 0C < TA < 70C - 40C < TA < 85C IB Input Bias Current (LT1884A) 0C < TA < 70C - 40C < TA < 85C Input Bias Current (LT1884/LT1885) 0C < TA < 70C - 40C < TA < 85C Input Noise Voltage en in VCM CMRR Input Noise Voltage Density Input Noise Current Density Input Voltage Range
q q q q q q q q q q q q q q q
CONDITIONS
MIN
TYP 25
MAX 50 85 110 80 125 150 0.8 0.8 300 400 500 900 1200 1400 400 500 600 900 1200 1400
UNITS V V V V V V V/C V/C pA pA pA pA pA pA pA pA pA pA pA pA VP-P nV/Hz pA/Hz
30
0C < TA < 70C - 40C < TA < 85C
0.3 0.3 150
150
150
150
0.1Hz to 10Hz f = 1kHz f = 1kHz VEE + 1.0 VEE + 1.2 114
0.4 9.5 0.05 VCC - 1.0 VCC - 1.2 130
V V dB
Common Mode Rejection Ratio
-13.5V < VCM < 13.5V
q
4
LT1884/LT1885
ELECTRICAL CHARACTERISTICS
The q denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25C. Split supply operation VS = 15V; VCM = 0V unless otherwise noted. (Note 5)
SYMBOL + PSRR - PSRR AVOL PARAMETER Positive Power Supply Rejection Ratio Negative Power Supply Rejection Ratio Minimum Operating Supply Voltage Large-Signal Voltage Gain RL = 10k; -13.5V < VOUT < 13.5V
q
CONDITIONS VEE = -15V, VCM = 0V; 1.5V < VCC < 18V VCC = 15V, VCM = 0V; -1.5V < VEE < -18V
q q q
MIN 114 106 1000 700 250 175 100 75
TYP 132 132 1.2 1600 420 230 20 25 70 270 160 160 180 360 0.85
MAX
UNITS dB dB
1.35
V V/mV V/mV V/mV V/mV V/mV V/mV
RL = 2k; -13.5V < VOUT < 13.5V
q
RL = 1k; -12V < VOUT < 12V
q
VOL
Output Voltage Swing Low (Referred to VEE)
No Load ISINK = 100A ISINK = 1mA ISINK = 5mA No Load ISOURCE = 100A ISOURCE = 1mA ISOURCE = 5mA VS = 15V
q q q q q q q q q
40 50 150 600 220 230 300 600 1.1 1.6
mV mV mV mV mV mV mV mV mA mA mA mA MHz s V/s V/s V/s V/s
VOH
Output Voltage Swing High (Referred to VCC)
IS ISC GBW tS SR + SR - VOS
Supply Current Per Amplifier Short-Circuit Current Gain-Bandwidth Product Settling Time Positive Slew Rate Negative Slew Rate Offset Voltage Match (LT1884A)
VOUT Short to VEE VOUT Short to VCC f = 20kHz 0.01%, VOUT = - 5V to 5V, AV = -1, RL = 2k AV = - 1
q q
15 15 1.5
50 30 2.2 17
q
0.5 0.4 0.40 0.26
1.0 0.7 35 70 125 160 125 175 235 1.1 600 700 850 1200 1600 1900
AV = - 1
q
(Note 7) 0C < TA < 70C - 40C < TA < 85C (Note 7) 0C < TA < 70C - 40C < TA < 85C (Note 6, 7) (Notes 7, 8) 0C < TA < 70C - 40C < TA < 85C (Notes 7, 8) 0C < TA < 70C - 40C < TA < 85C (Notes 7, 9) VEE = -15V, VCM = 0V, 1.5V < VCC < 18V, (Notes 7, 9) VCC = 15V, VCM = 0V, - 1.5V < VEE < -18V, (Notes 7, 9)
q q
V V V V V V V/C pA pA pA pA pA pA dB dB dB
Offset Voltage Match (LT1884/LT1885)
35
q q q q q
Offset Voltage Match Drift IB
+
0.4 200
Noninverting Bias Current Match (LT1884A) Noninverting Bias Current Match (LT1884/LT1885)
240
q q q q q
CMRR +PSRR - PSRR
Common Mode Rejection Match Positive Power Supply Rejection Match Negative Power Supply Rejection Match
106 108 102
125 124 132
5
LT1884/LT1885
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life of the device may be impaired. Note 2: The inputs are protected by back-to-back diodes. If the differential input voltage exceeds 0.7V, the input current should be limited to less than 10mA. Note 3: A heat sink may be required to keep the junction temperature below absolute maximum. Note 4: The LT1884C/LT1885C and LT1884I/LT1885I are guaranteed functional over the operating temperature range of - 40C to 85C. Note 5: The LT1884C/LT1885C are designed, characterized and expected to meet specified performance from - 40C to 85C but are not tested or QA sampled at these temperatures. LT1884I is guaranteed to meet specified performance from - 40C to 85C. Note 6: This parameter is not 100% tested. Note 7: Matching parameters are the difference between amplifiers A and B in the LT1884 and between amplifiers A and D and B and C in the LT1885. Note 8: This parameter is the difference between the two noninverting input bias currents. Note 9: CMRR and PSRR are defined as follows: CMRR and PSRR are measured in V/V on each amplifier. The difference is calculated in V/V and then converted to dB.
TYPICAL PERFOR A CE CHARACTERISTICS
Distribution of Offset Voltage Drift
24 20
PERCENT OF UNITS (%)
VS = 15V
INPUT OFFSET VOLTAGE (V)
16 12 8 4 0 -0.9 -0.7 -0.5 -0.3 -0.1 0.1 0.3 0.5 0.7 0.9 OFFSET VOLTAGE DRIFT (V/C)
18845 G01
50 0 -50
(VOUT - VEE) (mV)
VOUT vs ISOURCE
500 VS = 15V 140 120 400
(VCC - VOUT) (mV)
125C GAIN (dB) 25C
VOLTAGE GAIN (dB)
300
200 -55C 100
0 10A
100A
1mA ISOURCE
6
UW
10mA
18845 G04
Input Offset Voltage vs Temperature
200 TEMPCO: -55C TO 125C 150 10 REPRESENTATIVE UNITS
400 500
VOUT vs ISINK
VS = 15V
100
300
125C
25C 200
-100 -150 -200 -50 -30 -10 10 30 50 70 TEMPERATURE (C) 90 110 125
18845 G02
100 -55C 0 10A
100A ISINK
1mA
10mA
18845 G03
Gain vs Frequency
VS = 15V 100 90 80 70 60 50 40 30 20 10 0 -10 1 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
18845 G05
Gain, Phase Shift vs Frequency
-80 -90 PHASE SHIFT -100 -110
100 80 60 40 20 0 -20 0.1
PHASE SHIFT (DEG)
-120 -130 -140 -150 -160 GAIN -170 -180
-20 10k
100k 1M FREQUENCY (Hz)
10M
18845 G06
LT1884/LT1885 TYPICAL PERFOR A CE CHARACTERISTICS
CMRR vs Frequency
140 130 120 110 100 90 80 70 60 50 40 30 20 10 0 140 130 120 110 100 90 80 70 60 50 40 30 20 10 0
VOLTAGE NOISE DENSITY (nV/Hz) CURRENT NOISE DENSITY (fA/Hz)
SUPPLY POWER REJECTION (dB)
COMMON MODE REJECTION (dB)
1
10
100
10k 1k FREQUENCY (Hz)
0.1Hz to 10Hz Noise
VS = 15V TA = 25C NOISE VOLTAGE (O.2V/DIV) NOISE VOLTAGE (O.2V/DIV)
SLEW RATE (V/s)
TIME (2s/DIV)
18845 G10
Settling Time to 0.01% vs Output Step
10 8 6
OUTPUT STEP (V)
VS = 15V
SUPPLY CURRENT (mA)
4 2 0 -2 -4 -6 -8 -10 0 2 4
AV = 1
AV = -1
INPUT BIAS CURRENT (pA)
AV = 1
AV = -1
6 8 10 12 14 16 18 20 SETTLING TIME (s)
18845 G13
UW
100k
18845 G07
PSRR vs Frequency
1000
VS = 15V
Vn, In vs Frequency
NEGATIVE SUPPLY
100
CURRENT NOISE
POSITIVE SUPPLY
10
VOLTAGE NOISE
1
1 10 100 10k 1k FREQUENCY (Hz) 100k 1M
1M
1
10 100 FREQUENCY (Hz)
1000
18845 G09
18845 G08
0.01Hz to 1Hz Noise
VS = 15V TA = 25C
1.4
Slew Rate vs Temperature
RISING VS = 15V RISING VS = 5V
1.2
1.0
0.8 FALLING VS = 15V 0.6 FALLING VS = 5V
TIME (20s/DIV)
18845 G11
0.4 -50 -30 -10 10 30 50 70 TEMPERATURE (C)
90 110
18845 G12
Supply Current per Amplifier vs Supply Voltage
1.25 TA = 85C 1000 750 500 250 0 -250 -500 -750 0 0 4 8 12 16 20 24 28 32 36 40 SUPPLY VOLTAGE (V)
18845 G14
Input Bias Current vs Common Mode Voltage
TA = 25C
1.00
IBIAS+ IBIAS-
0.75
TA = 25C
0.50
TA = -40C
0.25
-1000 -15
-10
-5 5 10 0 COMMON MODE VOLTAGE (V)
15
LTXXXX * TPCXX
7
LT1884/LT1885 TYPICAL PERFOR A CE CHARACTERISTICS
Channel Separation vs Frequency
-20 -30 10
CHANNEL SEPARATION (dB)
-40 -50
GAIN (dB)
-60 -70 -80 -90 -100 -110 -120 100
1k
Gain vs Frequency vs CLOAD (AV = 1)
10 10
0
GAIN (dB)
GAIN (dB)
-10
-20 CLOAD = 330pF CLOAD = 150pF CLOAD = 50pF CLOAD = 0pF 1k 10k 100k 1M FREQUENCY (Hz) 10M 100M
18845 G18
-30
-40
Large-Signal Response
5V/DIV
VS = 15V RF = RG = 10k AV = -1
8
UW
Gain vs Frequency (AV = 1)
0 VS = 15V -10 VS = 2.5V
-20
-30
-40 10k 100k FREQUENCY (Hz) 1M 10M
18845 G16
1k
10k
100k 1M FREQUENCY (Hz)
10M
100M
18845 G17
Gain vs Frequency vs CLOAD (AV = - 1)
0
CLOAD = 500pF
-10 CLOAD = 300pF CLOAD = 100pF -30 CLOAD = 0pF
-20
-40 1k 10k 100k 1M FREQUENCY (Hz) 10M 100M
18845 G19
Small-Signal Response
20mV/DIV
50s/DIV
18845 G20
VS = 15V RF = RG = 10k AV = -1
2s/DIV
18845 G21
LT1884/LT1885
APPLICATIO S I FOR ATIO
The LT1884/LT1885 dual op amp features exceptional input precision with rail-to-rail output swing. Slew rate and small-signal bandwidth are superior to other amplifiers with comparable input precision. These characteristics make the LT1884/LT1885 a convenient choice for precision low voltage systems and for improved AC performance in higher voltage precision systems. Maintaining the advantage of the precision inherent in the amplifier depends upon proper applications circuit design and board layout. Preserving Input Precision Preserving the input voltage accuracy of the LT1884/ LT1885 requires that the applications circuit and PC board layout do not introduce errors comparable to or greater than the 30V offset. Temperature differentials across the input connections can generate thermocouple voltages of 10s of microvolts. PC board layouts should keep connections to the amplifier's input pins close together and away from heat dissipating components. Air currents across the board can also generate temperature differentials. The extremely low input bias currents, 100pA, allow high accuracy to be maintained with high impedance sources and feedback networks. The LT1884/LT1885's low input bias currents are obtained by using a cancellation circuit on-chip. This causes the resulting IBIAS + and IBIAS - to be uncorrelated, as implied by the IOS specification being comparable to the IBIAS. The user should not try to balance the input resistances in each input lead, as is commonly recommended with most amplifiers. The impedance at either input should be kept as small as possible to minimize total circuit error. PC board layout is important to ensure that leakage currents do not corrupt the low IBIAS of the amplifier. In high precision, high impedance circuits, the input pins should be surrounded by a guard ring of PC board
U
interconnect, with the guard driven to the same common mode voltage as the amplifier inputs. Input Common Mode Range The LT1884/LT1885 output is able to swing close to each power supply rail, but the input stage is limited to operating between VEE + 0.8V and VCC - 0.9V. Exceeding this common mode range will cause the gain to drop to zero; however, no gain reversal will occur. Input Protection The inverting and noninverting input pins of the LT1884/ LT1885 have limited on-chip protection. ESD protection is provided to prevent damage during handling. The input transistors have voltage clamping and limiting resistors to protect against input differentials up to 10V. Short transients above this level will also be tolerated. If the input pins may be subject to a sustained differential voltage above 10V, external limiting resistors should be used to prevent damage to the amplifier. A 1k resistor in each input lead will provide protection against a 30V differential voltage. Capacitive Loads The LT1884/LT1885 can drive capacitive loads up to 300pF when configured for unity gain. The capacitive load driving capability increases as the amplifier is used in higher gain configurations. Capacitive load driving may also be increased by decoupling the capacitance from the output with a small resistance. Input Bias Currents While it may be tempting to seek out a JFET amplifier for low input bias current, remember that bipolar devices improve with temperature while JFETs degrade.
W
UU
9
LT1884/LT1885
PACKAGE DESCRIPTIO U
Dimensions in inches (millimeters) unless otherwise noted. N8 Package 8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.400* (10.160) MAX 8 7 6 5
0.255 0.015* (6.477 0.381)
1 0.300 - 0.325 (7.620 - 8.255)
2
3
4 0.130 0.005 (3.302 0.127)
0.045 - 0.065 (1.143 - 1.651)
0.009 - 0.015 (0.229 - 0.381)
0.065 (1.651) TYP 0.125 (3.175) 0.020 MIN (0.508) MIN 0.018 0.003 (0.457 0.076)
N8 1098
(
+0.035 0.325 -0.015 +0.889 8.255 -0.381
)
0.100 (2.54) BSC
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
S8 Package 8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 - 0.197* (4.801 - 5.004) 8 7 6 5
0.228 - 0.244 (5.791 - 6.197)
0.150 - 0.157** (3.810 - 3.988)
1 0.010 - 0.020 x 45 (0.254 - 0.508) 0.008 - 0.010 (0.203 - 0.254) 0- 8 TYP
2
3
4
0.053 - 0.069 (1.346 - 1.752)
0.004 - 0.010 (0.101 - 0.254)
0.014 - 0.019 (0.355 - 0.483) TYP *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
0.016 - 0.050 (0.406 - 1.270)
0.050 (1.270) BSC
SO8 1298
10
LT1884/LT1885
PACKAGE DESCRIPTIO U
Dimensions in inches (millimeters) unless otherwise noted.
S Package 14-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.337 - 0.344* (8.560 - 8.738) 14 13 12 11 10 9 8
0.228 - 0.244 (5.791 - 6.197)
0.150 - 0.157** (3.810 - 3.988)
1 0.010 - 0.020 x 45 (0.254 - 0.508) 0.008 - 0.010 (0.203 - 0.254) 0 - 8 TYP
2
3
4
5
6
7
0.053 - 0.069 (1.346 - 1.752)
0.004 - 0.010 (0.101 - 0.254)
0.016 - 0.050 (0.406 - 1.270)
0.014 - 0.019 (0.355 - 0.483) TYP
0.050 (1.270) BSC
S14 1298
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
11
LT1884/LT1885
TYPICAL APPLICATIO U
16-Bit Voltage Output DAC on 5V Supply
5V 5V 1.65k
+
LT1884 LT1634 4.096V
-
-5V
R1
RCOM
REF
ROFS 33pF 5V DAC
-
LT1884
LTC(R)1597
+
-5V
VOUT - 4.096V TO 4.096V
18845 TA02
RELATED PARTS
PART NUMBER LT1112 LT1114 LT1167 LT1490 LT1793 LT1881/LT1882 LTC2050 DESCRIPTION Dual Picoamp Input Op Amp Quad Picoamp Input Op Amp Gain Programmable Instrumentation Amp Micropower Rail-to-Rail Input and Output Op Amp Low Noise JFET Op Amp Picoamp Input Rail-to-Rail Output Op Amp Zero Drift Op Amp in SOT-23 COMMENTS VOS = 60V Max VOS = 60V Max Gain Error = 0.08% Max Over-The-TopTM Common Mode Range IB = 10pA Max Lower Input Bias Currents Than LT1884/LT1885 VOS = 3V Max, Rail-to-Rail Output
Over-The-Top is a trademark of Linear Technology Corporation.
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX: (408) 434-0507 q www.linear-tech.com
18845f LT/TP 0400 4K * PRINTED IN USA
(c) LINEAR TECHNOLOGY CORPORATION 2000

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Price & Availability of LT1884

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