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OPA191, OPA2191, OPA4191
SBOS701B – DECEMEBER 2015 – REVISED JULY 2019
OPAx191 36-V, Low Power, Precision, CMOS, Rail-to-Rail Input/Output, Low Offset Voltage, Low Input Bias Current Op Amp
1 Features
•1 Low offset voltage: ±5 µV • Low offset voltage drift: ±0.1 µV/°C • Low noise: 15 nV/√Hz at 1 kHz • High common-mode rejection: 140 dB • Low bias current: ±5 pA • Rail-to-rail input and output • Wide bandwidth: 2.5-MHz GBW • High slew rate: 5 V/µs • Low quiescent current: 140 µA per amplifier • Wide supply: ±2.25 V to ±18 V, 4.5 V to 36 V • EMI/RFI filtered inputs • Differential input voltage range to supply rail • High capacitive load drive capability: 1 nF • Industry standard packages:
– Single in SOIC-8, SOT-5, and VSSOP-8 – Dual in SOIC-8 and VSSOP-8 – Quad in SOIC-14, TSSOP-14, and WQFN-16
2 Applications
• Multiplexed data-acquisition systems • Test and measurement equipment • High-resolution ADC driver amplifiers • SAR ADC reference buffers • Programmable logic controllers • High-side and low-side current sensing • High precision comparator
3 Description
The OPAx191 family (OPA191, OPA2191, and OPA4191) is a new generation of 36-V, e-trim™ operational amplifiers.
These devices offer outstanding dc precision and ac performance, including rail-to-rail input/output, low offset voltage (±5 µV, typ), low offset drift (±0.2 µV/°C, typ), and 2-MHz bandwidth.
Unique features, such as differential input-voltage range to the supply rail, high output current (±65 mA), high capacitive load drive of up to 1 nF, and high slew rate (5 V/µs), make the OPAx191 a robust, highperformance operational amplifier for high-voltage industrial applications.
The OPAx191 family of op amps is available in standard packages and is specified from –40°C to +125°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SOIC (8)
4.90 mm × 3.90 mm
OPA191
SOT (5)
2.90 mm × 1.60 mm
VSSOP (8)
3.00 mm × 3.00 mm
OPA2191
SOIC (8) VSSOP (8)
4.90 mm × 3.90 mm 3.00 mm × 3.00 mm
SOIC (14)
8.65 mm x 3.90 mm
OPA4191
TSSOP (14)
WQFN (16) (preview)
5.00 mm x 4.40 mm 4.00 mm x 4.00 mm
(1) For all available packages, see the package option addendum at the end of the data sheet.
Analog Inputs Bridge Sensor Thermocouple Current Sensing Optical Sensor
OPA191 in a High-Voltage, Multiplexed, Data-Acquisition System
4:2 HV MUX
OPA191 +
+ OPA191
Gain
Gain
Gain
OPA191 +
Gain
High-Voltage Multiplexed Input
High-Voltage Level Translation
VCM
REF3140
RC Filter
OPA625 Reference Driver
RC Filter
Antialiasing Filter
VIN REF
P
ADS8864 VIN
M
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
OPA191, OPA2191, OPA4191
SBOS701B – DECEMEBER 2015 – REVISED JULY 2019
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Pin Configuration and Functions ......................... 3 6 Specifications......................................................... 5
6.1 Absolute Maximum Ratings ...................................... 5 6.2 ESD Ratings.............................................................. 5 6.3 Recommended Operating Conditions....................... 5 6.4 Thermal Information: OPA191 .................................. 6 6.5 Thermal Information: OPA2191 ................................ 6 6.6 Thermal Information: OPA4191 ................................ 6 6.7 Electrical Characteristics: VS = ±4 V to ±18 V (VS = 8
V to 36 V) ................................................................... 7 6.8 Electrical Characteristics: VS = ±2.25 V to ±4 V (VS =
4.5 V to 8 V)............................................................... 9 6.9 Typical Characteristics ............................................ 11 7 Parameter Measurement Information ................ 20 7.1 Input Offset Voltage Drift......................................... 20 8 Detailed Description ............................................ 22 8.1 Overview ................................................................. 22
8.2 Functional Block Diagram ....................................... 22 8.3 Feature Description................................................. 23 8.4 Device Functional Modes........................................ 30 9 Application and Implementation ........................ 31 9.1 Application Information............................................ 31 9.2 Typical Applications .........