LT1782 Linear Technology, LT1782 Datasheet

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LT1782

Manufacturer Part Number
LT1782
Description
Micropower/ Over-The-Top SOT-23/ Rail-to-Rail Input and Output Op Amp
Manufacturer
Linear Technology
Datasheet

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FEATURES
APPLICATIO S
TYPICAL APPLICATIO
Operates with Inputs Above V
Rail-to-Rail Input and Output
Micropower: 55 A Supply Current Max
Small SOT-23 Package
Low Input Offset Voltage: 800 V Max
Single Supply Input Range: 0V to 18V
High Output Current: 18mA Min
Specified on 3V, 5V and 5V Supplies
Output Shutdown on 6-Lead Version
Reverse Battery Protection to 18V
High Voltage Gain: 1500V/mV
Gain Bandwidth Product: 200kHz
Slew Rate: 0.07V/ s
Operating Temperature Range: –40 C to 85 C
Portable Instrumentation
Battery- or Solar-Powered Systems
Sensor Conditioning
Supply Current Sensing
Battery Monitoring
MUX Amplifiers
4mA to 20mA Transmitters
5V TO 18V
LOAD
V
+
0.2
200
200
Positive Supply Rail Current Sense
I
LOAD
U
+
LT1782
5V
+
U
2N3904
2k
V
0V TO 4.3V
1782 TA01
OUT
= 2 (I
LOAD
)
Input and Output Op Amp
DESCRIPTIO
Micropower, Over-The-Top
The LT
SOT-23 package that operates on all single and split
supplies with a total voltage of 2.5V to 18V. The amplifier
draws less than 55 A of quiescent current and has reverse
battery protection, drawing negligible current for reverse
supply voltages up to 18V.
The input range of the LT1782 includes ground, and a
unique feature of this device is its Over-The-Top
tion capability with either or both of its inputs above the
positive rail. The inputs handle 18V both differential and
common mode, independent of supply voltage. The input
stage incorporates phase reversal protection to prevent
false outputs from occurring even when the inputs are 9V
below the negative supply.
The LT1782 can drive loads up to 18mA and still maintain
rail-to-rail capability. A shutdown feature on the 6-lead
version can disable the part, making the output high
impedance and reducing quiescent current to 5 A. The
LT1782 op amp is available in the 5- and 6-lead
SOT-23 packages. For applications requiring higher speed,
refer to the LT1783.
Over-The-Top is a trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
1782 is a 200kHz op amp available in the small
25
20
15
10
5
0
–900
Distribution of Input Offset Voltage
V
V
SOT-23, Rail-to-Rail
S
CM
–600
= 5V, 0V
U
= 2.5V
INPUT OFFSET VOLTAGE ( V)
–300
0
300
600
1782 TA01a
900
LT1782
TM
opera-
1

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LT1782 Summary of contents

Page 1

... The LT1782 can drive loads up to 18mA and still maintain rail-to-rail capability. A shutdown feature on the 6-lead version can disable the part, making the output high impedance and reducing quiescent current ...

Page 2

... 3V 5V 500mV to 4.5V 10k 5V TOP VIEW ORDER PART NUMBER + SHDN LT1782CS6 4 –IN S6 PART MARKING S6 PACKAGE LTIS = 230 MIN TYP MAX 400 800 950 0.1 0. ...

Page 3

... 10k, f =1kHz S O P– OUT P–P – SHDN 0.1Hz to 10Hz f = 1kHz f = 1kHz LT1782 MIN TYP MAX UNITS 200 500 mV 400 800 mV 2.91 2.94 V 2.6 2.8 V 4.91 4.94 V 4.5 4. ...

Page 4

... Note 7: This parameter is not 100% tested. Note 8: Specifications apply to 6-lead SOT-23 with shutdown and Note 9: Full-power bandwidth is calculated for the slew rate. S FPBW = SR and Note 10: The LT1782 is guaranteed functional over the operating S temperature range – 5V, and GBW at S MIN TYP MAX 3 ...

Page 5

... Output Short-Circuit Current vs Temperature SINKING CURRENT 30 SOURCING CURRENT –50 – 100 125 TEMPERATURE ( C) 1782 G06a LT1782 Output Voltage vs Large Input Voltage 5V – –10–8 –6 –4 – ...

Page 6

... LT1782 W U TYPICAL PERFOR A CE CHARACTERISTICS Noise Voltage Density vs Frequency 100 1k 10k FREQUENCY (Hz) 1782 G08 Gain Bandwidth Product vs Temperature 230 f = 5kHz V = 2.5V 220 S 210 200 190 180 170 –50 – 100 125 TEMPERATURE ( C) 1782 G11 Gain Bandwidth Product and ...

Page 7

... A = – 100k 0.001 OUTPUT VOLTAGE AMPLITUDE (V ) P-P 1782 G23 LT1782 Settling Time to 0.1% vs Output Step – –1 – – –3 – ...

Page 8

... PNP Output The output of the LT1782 can swing to within 60mV of the positive rail with no load and within 3mV of the negative rail with no load. When monitoring voltages within 60mV of the positive rail or within 3mV of the negative rail, gain should be taken to keep the output from clipping. The ...

Page 9

... APPLICATIO S I FOR ATIO sourcing current is reduced to 10mA at 3V total supplies as noted in the Electrical Characteristics. The LT1782 is internally compensated to drive at least 600pF of capacitance under any output loading condi- tions. A 0.22 F capacitor in series with a 150 resistor between the output and ground will compensate these amplifiers for larger capacitive loads 10,000pF, at all output currents ...

Page 10

... LT1782 PACKAGE DESCRIPTIO 0.35 – 0.55 (0.014 – 0.022) NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DIMENSIONS ARE INCLUSIVE OF PLATING 3. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 4. MOLD FLASH SHALL NOT EXCEED 0.254mm 5. PACKAGE EIAJ REFERENCE IS SC-74A (EIAJ Dimensions in inches (millimeters) unless otherwise noted. ...

Page 11

... PIN 1 1.90 2.6 – 3.0 (0.074) REF (0.110 – 0.118) 1.50 – 1.75 0.00 – 0.15 (0.059 – 0.069) (0.00 – 0.006) 0.35 – 0.50 0.09 – 0.20 (0.014 – 0.020) (0.004 – 0.008) SIX PLACES (NOTE 2) (NOTE 2) LT1782 0.95 (0.037) REF 0.90 – 1.45 (0.035 – 0.057) 0.90 – 1.30 (0.035 – 0.051) S6 SOT-23 0898 11 ...

Page 12

... Amplifier, Rail-to-Rail Input and Output , 200kHz GBW 55 A Supply Current MSOP Package, Shutdown Function CC 170 A Supply Current, Single Supply Input Range: –0.4V to 44V, Rail-to-Rail Input and Output 5V LT1782 5V LT1782 1782 TA03 Extends 44V Above V , Independent 1782f LT/TP 0400 4K • PRINTED IN USA ...

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