LT1494 LINER [Linear Technology], LT1494 Datasheet

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LT1494

Manufacturer Part Number
LT1494
Description
1.5UA Max, Single, Dual and Quad Over-The-Top Precision Rail-to-Rail Input and Output Op Amps
Manufacturer
LINER [Linear Technology]
Datasheet

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FEATURES
Over-The-Top is a trademark of Linear Technology Corporation.
TYPICAL
APPLICATIO S
, LTC and LT are registered trademarks of Linear Technology Corporation.
Low Supply Current: 1.5 A Max
Rail-to-Rail Input and Output
Low Offset Voltage: 375 V Max
Operating Temperature Range: – 40 C to 125 C
Over-The-Top
Wide Supply Range: 2.2V to 36V
Single Supply Input Range: – 0.3V to 36V
Low Input Bias Current: 250pA
Low Input Offset Current: 20pA
High A
Output Sources and Sinks 500 A Load Current
Reverse Battery Protected to 18V
Battery- or Solar-Powered Systems
Portable Instrumentation
Remote Sensor Amplifier
Micropower Filter
LOAD
V
CC
VOL
R
0.1
I
S
L
OUTPUT SWITCHES
WHEN I
I
S
: 100V/mV Minimum Driving 100k Load
= 3 A DURING INTEGRATION; I
APPLICATION
1M
1M
Micropower Integrating Current Sense
R
V
I
CC
TM
L
dt = 0.98 V
Inputs Operate Above V
U
10M
+
1/2 LT1495
CC
RESET
0.1 F
200k
R
R
I
S
C = (4.9A)(SEC) FOR V
U
S
10M
= 5 A END OF INTEGRATION
+
1/2 LT1495
Rail-to-Rail Input and Output Op Amps
+
CC
= 5V
and Quad Over-The-Top Precision
1495 TA01
V
O
DESCRIPTIO
The LT
(I
extremely low supply current is combined with excellent
amplifier specifications: input offset voltage is 375 V
maximum with a typical drift of only 0.4 V/ C, input offset
current is 100pA maximum. A minimum open-loop gain
(A
device characteristics change little over the supply range
of 2.2V to 15V. Supply rejection is 90dB and the common
mode rejection ratio is 90dB. Operation is specified for 3V,
5V and 15V supplies. Reverse battery protection
(–18V min) and inputs that operate above the positive
supply make the LT1494/LT1495/LT1496 easy to use in
harsh environments.
The low bias currents and offset current of the amplifier
permit the use of megohm level source resistors without
introducing significant errors. Voltage noise at 4 V
remarkably low considering the low supply current.
The LT1494 is available in the 8-Pin MSOP, PDIP and SO
packages.The LT1495 is available in plastic 8-Pin PDIP
and SO packages with the standard dual op amp pinout.
The LT1496 is available in 14-Pin SO and PDIP packages.
S
VOL
1.5 A) op amps with precision specifications. The
) of 100V/mV ensures that gain errors are small. The
®
1494/LT1495/LT1496 are the lowest power
1.5 A Max, Single, Dual
30
25
20
15
10
5
0
– 2.0
LT1494/LT1495/LT1496
100 AMPLIFIERS
V
–40 C TO 85 C
–1.6
S
= 2.5V
U
–1.2
TC V
–0.8
OS
TC V
–0.4
Distribution
OS
0
( V/ C)
0.4
0.8
1.2
1495 TA02
1.6
2.0
P-P
1
is

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LT1494 Summary of contents

Page 1

... Voltage noise remarkably low considering the low supply current. The LT1494 is available in the 8-Pin MSOP, PDIP and SO packages.The LT1495 is available in plastic 8-Pin PDIP and SO packages with the standard dual op amp pinout. ...

Page 2

... Consult LTC Marketing for parts specified with wider operating temperature ranges RATINGS (Note 1) Specified Temperature Range (Note 3) LT1494C/LT1495C/LT1496C .............. – LT1494I/LT1495I/LT1496I ................. – LT1494H/LT1495H/LT1496H ........... – 125 C Storage Temperature Range ................. – 150 C Junction Temperature ........................................... 150 C Lead Temperature (Soldering, 10 sec).................. 300 C ...

Page 3

... Load I = 100 A SINK No Load I = 100 A SOURCE (Note 5) (Note per Amplifier – 100Hz LT1494/LT1495/LT1496 MIN TYP MAX 150 375 200 475 150 475 200 575 250 1000 180 360 20 100 4 185 10 100 500 50 250 ...

Page 4

... LT1494/LT1495/LT1496 ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the temperature range supply, unless otherwise noted. (Note 3) SYMBOL PARAMETER V Input Offset Voltage Input Offset Voltage Drift OS I Input Bias Current B I Input Offset Current OS A Large-Signal Voltage Gain ...

Page 5

... R = 100k – 15V to 14V 15V 100k 100k L LT1494/LT1495/LT1496 125 5V, 0V 3V, 0V LT1494H/LT1495H/LT1496H MIN TYP MAX 225 875 275 975 0.4 3 3.8 10 0.300 105 2.7 70 160 275 ...

Page 6

... LT1494/LT1495/LT1496 ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the temperature range otherwise noted. (Note 3) SYMBOL PARAMETER V Input Offset Voltage OS I Input Bias Current B I Input Offset Current OS A Large-Signal Voltage Gain VOL Input Voltage Range CMRR Common Mode Rejection Ratio ...

Page 7

... L – but are not tested or QA sampled at these temperatures. The LT1494I/LT1495I/LT1496I are guaranteed to meet specified performance from – The LT1494H/LT1495H/LT1496H are guaranteed to meet specified performance from – 125 C. Note 4: This parameter is not 100% tested. Note 5: V ...

Page 8

... LT1494/LT1495/LT1496 W U TYPICAL PERFORMANCE CHARACTERISTICS Output Saturation Voltage vs Load Current (Output Low) 1000 100 – 0 100 1000 LOAD CURRENT ( A) 1495 G04 Gain and Phase Shift vs Frequency 2. PHASE 20 10 GAIN 0 –10 – ...

Page 9

... TIME AFTER POWER-UP (SEC) 1495 G16 Small-Signal Response V = 15V S 1495 G19 V = 15V 100pF L LT1494/LT1495/LT1496 Power Supply Rejection Ratio vs Frequency 100 POSITIVE 80 SUPPLY NEGATIVE 40 SUPPLY 0.01 0 FREQUENCY (kHz) ...

Page 10

... The simplified schematic, Figure 3, details the circuit design approach of the LT1494/LT1495/LT1496. The – amplifier topology is a three-stage design consisting of a rail-to-rail input stage, that continues to operate with the 1495 F02 inputs above the positive rail, a folded cascode second ...

Page 11

... Capacitor C1 sets the , devices Q3 CC amplifier bandwidth. The output stage is configured for maximum swing by the use of common emitter output devices Q21 and Q22. Diodes and current source , Schottky CC Q15 set the output quiescent current. LT1494/LT1495/LT1496 D7 Q15 Q20 + I 1 Q21 C1 ...

Page 12

... LT1494/LT1495/LT1496 U TYPICAL APPLICATIONS 100k 562k 2.5V 0.0082 F 1N5712 1N4148 Q1: ZTX-849 *1% METAL FILM † POLYSTYRENE 15k INPUT 2 10M – 1/2 0.047 F LTC1441 + 0kHz to 10kHz Voltage to Frequency Converter 390 + 1 F – ® LTC 1440 + 12pF 3.6M TYP SELECT FOR 100Hz ...

Page 13

... Plastic MSOP (Reference LTC DWG # 05-08-1660) 0.118 0.004* (3.00 0.102) 0.193 0.006 (4.90 0.15) 0.043 (1.10) 0 – 6 TYP SEATING PLANE 0.009 – 0.015 0.021 0.006 (0.22 – 0.38) (0.53 0.015) LT1494/LT1495/LT1496 Filter Frequency Response 0 –10 –20 –30 –40 –50 – 100 1000 FREQUENCY (Hz) LT1495/96 • TA04 ...

Page 14

... LT1494/LT1495/LT1496 PACKAGE DESCRIPTION 0.300 – 0.325 (7.620 – 8.255) 0.009 – 0.015 (0.229 – 0.381) 0.325 8.255 *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 – 0.508) 0.008 – 0.010 (0.203 – ...

Page 15

... TYP 0.014 – 0.019 (0.355 – 0.483) TYP LT1494/LT1495/LT1496 0.770* (19.558) MAX 0.065 (1.651) TYP 0.018 0.003 (0 ...

Page 16

... LTC1440: Single, LTC1441/42: Dual LTC1443: 1.182 Reference LTC1444/45: 1.221V Reference and Adjustable Hysteresis 390 V V 950 V V 350nA Supply Current 225 V V Shutdown Pin, MSOP Decompensated Version of the LT1494/LT1495/LT1496 A V 120 V V 120 V V SOT-23, 800 V V Gain-Bandwidth = 200kHz, Shutdown Pin SOT-23, 800 V V Gain-Bandwidth = 1 ...

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