LT1884 Linear Technology, LT1884 Datasheet

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LT1884

Manufacturer Part Number
LT1884
Description
Dual/Quad Rail-to-Rail Output/ Picoamp Input Precision Op Amps
Manufacturer
Linear Technology
Datasheet

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FEATURES
TYPICAL APPLICATIO
APPLICATIO S
Offset Voltage: 50 V Max (LT1884A)
Input Bias Current: 400pA Max (LT1884A)
Offset Voltage Drift: 0.8 V/ 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
Thermocouple Amplifiers
Bridge Transducer Conditioners
Instrumentation Amplifiers
Battery-Powered Systems
Photo Current Amplifiers
Precision Integrators
Precision Current Sources
U
GUARD
–IN
+IN
U
1/4 LT1885
Input Fault Protected Instrumentation Amplifier
TRIM FOR
AC CMRR
10pF
1M
1M
+
22pF
R
R
G/2
G/2
3
5
+
+
1/4 LT1885
1/4 LT1885
10k
10k
DESCRIPTIO
The LT
performance to amplifiers with rail-to-rail output swing
while providing faster response than other precision am-
plifiers. Input offset voltage is trimmed to less than 50 V
and the low drift maintains this accuracy over the operat-
ing 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.
®
Output, Picoamp Input
10k
10k
1884/LT1885 op amps bring high accuracy input
Dual/Quad Rail-to-Rail
9.76k
10k
+
1/4 LT1885
Precision Op Amps
FOR DC CMRR
TRIM FIRST
U
500
GAIN =
1884 TA01
LT1884/LT1885
2•10k
R
G
OUT
1

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LT1884 Summary of contents

Page 1

... 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. ...

Page 2

... PARAMETER V Input Offset Voltage (LT1884A) OS Input Offset Voltage (LT1884/LT1885) Input Offset Voltage Drift (Note 6) I Input Offset Current (LT1884A) OS Input Offset Current (LT1884/LT1885 (Note 1) Operating Temperature Range (Note 4) .. – Specified Temperature Range (Note 5) ... – – Maximum Junction Temperature .......................... 150 C Storage Temperature Range ................. – ...

Page 3

... T Single supply operation 5V SYMBOL PARAMETER I Input Bias Current (LT1884A) B Input Bias Current (LT1884/LT1885) Input Noise Voltage e Input Noise Voltage Density n i Input Noise Current Density ...

Page 4

... S CM SYMBOL PARAMETER V Input Offset Voltage (LT1884A) OS Input Offset Voltage (LT1884/LT1885) Input Offset Voltage Drift (Note 6) I Input Offset Current (LT1884A) OS Input Offset Current (LT1884/LT1885) I Input Bias Current (LT1884A) B Input Bias Current (LT1884/LT1885) Input Noise Voltage e Input Noise Voltage Density n ...

Page 5

... SC GBW Gain-Bandwidth Product t Settling Time Positive Slew Rate – SR Negative Slew Rate V Offset Voltage Match (LT1884A) OS Offset Voltage Match (LT1884/LT1885) Offset Voltage Match Drift + I Noninverting Bias Current Match B (LT1884A) Noninverting Bias Current Match (LT1884/LT1885) CMRR Common Mode Rejection Match +PSRR Positive Power Supply Rejection Match – ...

Page 6

... G04 6 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. ...

Page 7

... Supply Voltage –40 C 0. SUPPLY VOLTAGE (V) 18845 G14 LT1884/LT1885 Frequency n n 1000 CURRENT NOISE 100 VOLTAGE NOISE 100 1000 FREQUENCY (Hz) 18845 G09 Slew Rate vs Temperature 1.4 RISING V = 15V S 1.2 RISING 1 ...

Page 8

... LT1884/LT1885 W U TYPICAL PERFOR A CE CHARACTERISTICS Channel Separation vs Frequency –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 100 1k 10k FREQUENCY (Hz) Gain vs Frequency –10 – 330pF LOAD – 150pF LOAD C = 50pF LOAD C = 0pF LOAD –40 1k 10k ...

Page 9

... 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 operat- ing between V common mode range will cause the gain to drop to zero; ...

Page 10

... LT1884/LT1885 PACKAGE DESCRIPTIO 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) +0.035 0.325 –0.015 +0.889 8.255 –0.381 *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm) 0.010 – 0.020 (0.254 – ...

Page 11

... TYP 0.014 – 0.019 (0.355 – 0.483) TYP LT1884/LT1885 0.150 – 0.157** (3.810 – 3.988 0.004 – 0.010 (0.101 – 0.254) 0.050 (1 ...

Page 12

... COMMENTS Max Max OS Gain Error = 0.08% Max TM Over-The-Top I = 10pA Max B Lower Input Bias Currents Than LT1884/LT1885 Max, Rail-to-Rail Output OUT – 4.096V LT1884 TO 4.096V –5V 18845 TA02 Common Mode Range 18845f LT/TP 0400 4K • PRINTED IN USA ...

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