SBOS807E December   2016  – May 2020 OPA187 , OPA2187 , OPA4187

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      OPAx187 Offers Precision Low-Side Current Measurement Capability
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions: OPA187
    2.     Pin Functions: OPA2187
    3.     Pin Functions: OPA4187
  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: OPA187
    5. 6.5 Thermal Information: OPA2187
    6. 6.6 Thermal Information: OPA4187
    7. 6.7 Electrical Characteristics: High-Voltage Operation
    8. 6.8 Electrical Characteristics: Low-Voltage Operation
    9. 6.9 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Operating Characteristics
      2. 7.3.2 Phase-Reversal Protection
      3. 7.3.3 Input Bias Current Clock Feedthrough
      4. 7.3.4 Internal Offset Correction
      5. 7.3.5 EMI Rejection
      6. 7.3.6 Capacitive Load and Stability
      7. 7.3.7 Electrical Overstress
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 High-Side Voltage-to-Current (V-I) Converter
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Discrete INA + Attenuation for ADC With 3.3-V Supply
      3. 8.2.3 Bridge Amplifier
      4. 8.2.4 Low-Side Current Monitor
      5. 8.2.5 Programmable Power Supply
      6. 8.2.6 RTD Amplifier With Linearization
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 TINA-TI™ (Free Software Download)
        2. 11.1.1.2 TI Precision Designs
        3. 11.1.1.3 WEBENCH® Filter Designer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Related Links
    4. 11.4 Receiving Notification of Documentation Updates
    5. 11.5 Support Resources
    6. 11.6 Trademarks
    7. 11.7 Electrostatic Discharge Caution
    8. 11.8 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6.7 Electrical Characteristics: High-Voltage Operation

at TA = +25°C, VS = ±4 V to ±18 V (VS = +8 V to +36 V), RL = 10 kΩ connected to VS / 2(1), and VCM = VOUT = VS / 2(1) (unless otherwise noted)
PARAMETER CONDITIONS MIN TYP MAX UNIT
OFFSET VOLTAGE
VOS Input offset voltage ±1 ±10 μV
TA = –40°C to +125°C  ±0.001  ±0.015 μV/°C
PSRR Power-supply rejection ratio VS = 4.5 V to 36 V, TA = –40°C to +125°C ±0.01 ±1 μV/V
INPUT BIAS CURRENT
IB Input bias current VCM = VS / 2 ±100 ±350 pA
TA = –40°C to +125°C  ±7.5  nA
IOS Input offset current ±100 ±500 pA
TA = –40°C to +125°C  ±14.5  nA
NOISE
en Input voltage noise f = 0.1 Hz to 10 Hz 0.4 µVPP
f = 0.1 Hz to 10 Hz 60 nVrms
Input voltage noise density f = 1 kHz 20 nV/√Hz
in Input current noise density f = 1 kHz 160 fA/√Hz
INPUT VOLTAGE RANGE
VCM Common-mode voltage range (V–) – 0.1 (V+) – 2 V
CMRR Common-mode rejection ratio (V–) – 0.1 V < VCM < (V+) – 2 V, VS = ±18 V 126 140 dB
(V–) < VCM < (V+) – 2 V, VS = ±18 V, TA = –40°C to +125°C 130 145 dB
INPUT IMPEDANCE
ZID Differential 100 || 6 MΩ || pF
ZIC Common-mode 6 || 4.2 1012 Ω || pF
OPEN-LOOP GAIN
AOL Open-loop voltage gain TA = –40°C to +125°C, VS = ±4 V to ±18 V, (V–) + 0.3 V < VO < (V+) – 0.3 V, RL = 10 kΩ 132 160 dB
FREQUENCY RESPONSE
GBW Gain-bandwidth product 550 kHz
SR Slew rate VO = 10-V step, G = +1 0.2 V/μs
tS Settling time 0.1% VS = ±18 V, G = 1, 10-V step 46 μs
0.01% VS = ±18 V, G = 1, 10-V step 48 μs
tOR Overload recovery time VIN × G = VS 8 μs
THD+N Total harmonic distortion + noise 1 kHz, G = +1, VOUT = 3.5 VRMS, No Load 0.035%
OUTPUT
Voltage output swing from rail VS = ±4 V to ±18 V, No Load 5 15 mV
VS = ±4 V to ±18 V, RL = 10 kΩ 75 100
VS = ±4 V to ±18 V, RL = 10 kΩ, TA = –40°C to +125°C 100 125
ISC Short-circuit current VS = ±18 V, Sinking –30 mA
VS = ±18 V, Sourcing +30 mA
RO Open-loop output resistance f = 550 kHz, IO = 0, See Figure 21 1.4 kΩ
CLOAD Capacitive load drive See Typical Characteristics
POWER SUPPLY
IQ Quiescent current (per amplifier) VS = ±4 V to VS = ±18 V 100 145 μA
IO = 0 mA, TA = –40°C to +125°C 150 μA
(1) VS / 2 = midsupply.