SBOS701D December   2015  – August 2021 OPA191 , OPA2191 , OPA4191

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information: OPA191
    5. 6.5 Thermal Information: OPA2191
    6. 6.6 Thermal Information: OPA4191
    7. 6.7 Electrical Characteristics: VS = ±4 V to ±18 V (VS = 8 V to 36 V)
    8. 6.8 Electrical Characteristics: VS = ±2.25 V to ±4 V (VS = 4.5 V to 8 V)
    9. 6.9 Typical Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1 Input Offset Voltage Drift
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Input Protection Circuitry
      2. 8.3.2 EMI Rejection
      3. 8.3.3 Phase Reversal Protection
      4. 8.3.4 Thermal Protection
      5. 8.3.5 Capacitive Load and Stability
      6. 8.3.6 Common-Mode Voltage Range
      7. 8.3.7 Electrical Overstress
      8. 8.3.8 Overload Recovery
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Low-side Current Measurement
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
      2. 9.2.2 16-Bit Precision Multiplexed Data-Acquisition System
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
      3. 9.2.3 Slew Rate Limit for Input Protection
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
        1. 12.1.1.1 TINA-TI™ SImulation Software (Free Download)
        2. 12.1.1.2 TI Precision Designs
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Support Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.7 Electrical Characteristics: VS = ±4 V to ±18 V (VS = 8 V to 36 V)

at TA = +25°C, VCM = VOUT = VS / 2, and RL = 10 kΩ connected to VS / 2 (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
OFFSET VOLTAGE
VOS Input offset voltage VS = ±18 V ±5 ±25 µV
TA = 0°C to 85°C ±8 ±75
TA = –40°C to +125°C ±10 ±125
(V+) – 3.0 V < VCM < (V+) – 1.5 V See Typical Characteristics
VS = ±18 V,
VCM = (V+) – 1.5 V		 ±10 ±50
TA = 0°C to 85°C ±25 ±150
TA = –40°C to +125°C ±50 ±250
OPA4191 (RUM, PW), VS = ±18 V
VCM = (V+) – 1.5 V		 ±5 ±50
TA = 0°C to 85°C ±10 ±475
TA = –40°C to +125°C ±20 ±740
dVOS/dT Input offset voltage drift VS = ±18 V, D and PW packages only TA = 0°C to 85°C ±0.1 ±0.8 µV/°C
TA = –40°C to +125°C ±0.15 ±1.2
VS = ±18 V, RUM, DGK and DBV packages only TA = 0°C to 85°C ±0.1 ±0.9
TA = –40°C to +125°C ±0.15 ±1.3
VS = ±18 V, VCM = (V+) – 1.5 V TA = –40°C to +125°C ±0.5
PSRR Power-supply rejection ratio TA = –40°C to +125°C ±0.3 ±1.0 µV/V
INPUT BIAS CURRENT
IB Input bias current ±5 ±20 pA
TA = –40°C to +125°C ±9 nA
IOS Input offset current ±2 ±20 pA
TA = –40°C to +125°C ±2 nA
NOISE
En Input voltage noise (V–) – 0.1 V < VCM < (V+) – 3 V f = 0.1 Hz to 10 Hz 1.4 µVPP
(V+) – 1.5 V < VCM < (V+) + 0.1 V f = 0.1 Hz to 10 Hz 7
en Input voltage noise density (V–) – 0.1 V < VCM < (V+) – 3 V f = 100 Hz 18 nV/√Hz
f = 1 kHz 15
(V+) – 1.5 V < VCM < (V+) + 0.1 V f = 100 Hz 53
f = 1 kHz 24
in Input current noise density f = 1 kHz 1.5 fA/√Hz
INPUT VOLTAGE
VCM Common-mode voltage range (V–) – 0.1 (V+) + 0.1 V
CMRR Common-mode rejection ratio VS = ±18 V,
(V–) – 0.1 V < VCM < (V+) – 3 V		 120 140 dB
VS = ±18 V,
(V–) < VCM < (V+) – 3 V		 TA = –40°C to +125°C 114 126
VS = ±18 V,
(V+) – 1.5 V < VCM < (V+)		 96 120
TA = –40°C to +125°C 86 100
(V+) – 3 V < VCM < (V+) – 1.5 V See Typical Characteristics
INPUT IMPEDANCE
ZID Differential 100 || 1.6 MΩ || pF
ZIC Common-mode 1 || 6.4 1013Ω || pF
OPEN-LOOP GAIN
AOL Open-loop voltage gain VS = ±18 V,
(V–) + 0.6 V < VO < (V+) – 0.6 V,
RL = 2 kΩ		 124 134 dB
VS = ±18 V,
(V–) + 0.8 V < VO < (V+) – 0.8 V,
RL = 2 kΩ, RUM  package		 124 134
VS = ±18 V,
(V–) + 0.6 V < VO < (V+) – 0.6 V,
RL = 2 kΩ		 TA = –40°C to +125°C 114 126
VS = ±18 V,
(V–) + 0.8 V < VO < (V+) – 0.8 V,
RL = 2 kΩ, RUM package		 TA = –40°C to +125°C 114 126
VS = ±18 V,
(V–) + 0.3 V < VO < (V+) – 0.3 V,
RL = 10 kΩ		 126 140
VS = ±18 V,
(V–) + 0.3 V < VO < (V+) – 0.3 V,
RL = 10 kΩ		 TA = –40°C to +125°C 120 134
FREQUENCY RESPONSE
GBW Unity gain bandwidth 2.5 MHz
SR Slew rate VS = ±18 V, G = 1, 10-V step Falling 7.5 V/µs
Rising 5.5
ts Settling time To 0.01%, CL = 20 pF VS = ±18 V, G = 1, 2-V step 0.7 µs
VS = ±18 V, G = 1, 5-V step 1
To 0.001%, CL = 20 pF VS = ±18 V, G = 1, 2-V step 1.8
VS = ±18 V, G = 1, 5-V step 3.7
tOR Overload recovery time VIN × G = VS From overload to negative rail 0.4 µs
From overload to positive rail 1
THD+N Total harmonic distortion + noise G = 1, f = 1 kHz, VO = 3.5 VRMS 0.0012%
Crosstalk OPA2191 and OPA4191, at dc 150 dB
OPA2191 and OPA4191, f = 100 kHz 130 dB
OUTPUT
VO Voltage output swing from rail Positive rail No load 5 15 mV
RL = 10 kΩ 50 110
RL = 2 kΩ 200 500
Negative rail No load 5 15
RL = 10 kΩ 50 110
RL = 2 kΩ 200 500
ISC Short-circuit current VS = ±18 V ±65 mA
CL Capacitive load drive See Typical Characteristics
ZO Open-loop output impedance f = 1 MHz, IO = 0 A, See Typical Characteristics 700 Ω
POWER SUPPLY
IQ Quiescent current per amplifier IO = 0 A 140 200 µA
TA = –40°C to +125°C 250
TEMPERATURE
Thermal protection 180 °C
Thermal hysteresis 30 °C