LT1672 LINER [Linear Technology], LT1672 Datasheet

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LT1672

Manufacturer Part Number
LT1672
Description
2MMax, AV=>5 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
APPLICATIO S
Over-The-Top is a trademark of Linear Technology Corporation.
TYPICAL
, LTC and LT are registered trademarks of Linear Technology Corporation.
V
V
Gain of 5 Stable
Low Supply Current: 2 A Max per Amplifier
Rail-to-Rail Input and Output
Low Offset Voltage: 375 V Max
Over-The-Top
Gain Bandwidth Product: 12kHz
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
Photodiode Amplifier
High Impedance Circuits
IN1
IN2
1000pF
110k
110k
100k*
100k*
VOL
Single Supply, 60 W Precision Instrumentation Amplifier
: 100V/mV Minimum Driving 100k Load
APPLICATION
+
+
1/2 LT1673
1/2 LT1673
TM
5V
Inputs Operate Above V
1M
1M
U
100k
100k
1M
0.0047 F
U
+
LT1672
1M
5V
1672/3/4 TA01
LT1389-2.5
Rail-to-Rail Input and Output Op Amps
+
1M
V
5V
OUT
and Quad Over-The-Top Precision
A
BANDWIDTH = 1kHz
CMRR = 65dB AT 120Hz
*500V TRANSIENT PROTECTION
TOTAL SUPPLY CURRENT = 12 A
V
= 100
DESCRIPTIO
The LT
(I
sion specifications. The 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
gain errors are small. The devices’ 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 LT1672/
LT1673/LT1674 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. For
unity gain stable versions of these amplifiers, see the
LT1494/LT1495/LT1496.
The LT1672 is available in the 8-pin MSOP, PDIP and SO
packages. The LT1673 is available in plastic 8-pin PDIP
and SO-8 packages with the standard dual op amp pinout.
The LT1674 is available in 14-pin PDIP and SO packages.
S
2 A Max, A
2 A) decompensated (A
®
1672/LT1673/LT1674 are ultralow power
LT1672/LT1673/LT1674
U
80
70
60
50
40
30
20
10
V
0
–1.5
120 AMPLIFIERS
V
– 40 C to 85 C
S
VOL
= 2.5V
V
– 0.9
5 Single, Dual
) of 100V/mV ensures that
TC V
5) op amps with preci-
TC V
OS
– 0.3
Distribution
OS
( V/ C)
0.3
0.9
1672/3/4 TA02
P-P
1
1.5
is

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LT1672 Summary of contents

Page 1

... For unity gain stable versions of these amplifiers, see the LT1494/LT1495/LT1496. The LT1672 is available in the 8-pin MSOP, PDIP and SO packages. The LT1673 is available in plastic 8-pin PDIP and SO-8 packages with the standard dual op amp pinout. The LT1674 is available in 14-pin PDIP and SO packages. ...

Page 2

... MS8 Package S (Note 10V (Note 6) CM (Note 5) 0.1Hz to 10Hz ORDER PART NUMBER TOP VIEW LT1672CN8 LT1672CS8 7 V LT1672IN8 OUT 6 LT1672IS8 PART MARKING S8 PACKAGE 8-LEAD PLASTIC SO 1672 = 130 C/ W (N8 190 C/ W (S8) JA 1672I ORDER PART TOP VIEW NUMBER ...

Page 3

... 0. 0.2V to 10V 2.4V to 12V 0. Load I = 100 A SINK No Load I = 100 A SOURCE (Note 5) (Note 6) LT1672/LT1673/LT1674 MIN TYP MAX 185 10 100 500 50 250 106 2.1 2.2 50 100 210 410 + + V – 0.07 V – 0.035 + ...

Page 4

... LT1672/LT1673/LT1674 ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the temperature range of – half supply, unless otherwise noted. (Note SYMBOL PARAMETER V Input Offset Voltage Input Offset Voltage Drift OS I Input Bias Current B I Input Offset Current ...

Page 5

... Note 2: The LT1672C/LT1673C/LT1674C and LT1672I/LT1673I/LT1674I are guaranteed functional over the Operating Temperature Range of – Note 3: The LT1672C/LT1673C/LT1674C are guaranteed to meet specified performance from The LT1672C/LT1673C/LT1674C are designed, characterized and expected to meet specified performance from CONDITIONS MS8 Package ...

Page 6

... LT1672/LT1673/LT1674 W U TYPICAL PERFORMANCE CHARACTERISTICS Distribution of Input Offset Voltage 5V LT1672/73/74 5600 AMPLIFIERS –400 –300 –200 –100 0 100 200 300 400 INPUT OFFSET VOLTAGE ( V) 1672/73/74 G01 Output Saturation Voltage vs Load Current (Output Low) 1000 V = 5V, 0V ...

Page 7

... Open-Loop Gain 100k L – 5 –10 –15 – OUTPUT VOLTAGE (V) LT1672/LT1673/LT1674 Capacitive Load Handling 2. 100 CAPACITIVE LOAD (pF) 1672/3/4 G07 Output Impedance vs Frequency 100 V = 2.5V ...

Page 8

... OUTPUT V /2 Inputs S While the LT1672/LT1673/LT1674 will function normally with its inputs taken above the positive supply, the com mon mode range does not extend beyond approximately 300mV below the negative supply at room temperature. ...

Page 9

... Rail-to-Rail Operation The simplified schematic, Figure 3, details the circuit design approach of the LT1672/LT1673/LT1674. The amplifier topology is a three-stage design consisting of a rail-to-rail input stage, that continues to operate with the inputs above the positive rail, a folded cascode second stage that develops most of the voltage gain, and a rail-to- rail common emitter stage that provides the current gain ...

Page 10

... MIN 0.018 0.003 0.100 (2.54) (0.457 0.076) BSC Over-the-Top Comparator with Hysteresis 10k IN1 + (0V TO 12V) LT1672 – 2N5087 10k 1M IN2 (0V TO 12V) 2N5210 V CC HYSTERESIS = 100 1672/3/4 TA03 I < 0.118 0.004* (3.00 0.102 ...

Page 11

... TYP 0.014 – 0.019 (0.355 – 0.483) TYP LT1672/LT1673/LT1674 0.189 – 0.197* (4.801 – 5.004 0.150 – 0.157** (3.810 – 3.988 0.004 – 0.010 (0.101 – ...

Page 12

... STABILITY REQUIREMENT AT AC. COMMENTS LTC1440: Single, LTC1441/42: Dual LTC1443: 1.182 Reference LTC1444/45: 1.221V Reference and Adjustable Hysteresis 390 V V 950 V V Unity Gain Stable Version of the LT1672/LT1673/LT1674 350nA Supply Current 225 V V Shutdown Pin, MSOP 120 V V 120 V V SOT-23, 800 V V ...

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