SBOS925E December   2020  – October 2024 OPA2391 , OPA391 , OPA4391

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information: OPA391
    5. 5.5 Thermal Information: OPA2391
    6. 5.6 Thermal Information: OPA4391
    7. 5.7 Electrical Characteristics: OPA391DCK and OPA2391YBJ
    8. 5.8 Electrical Characteristics: OPA2391DGK and OPA4391PW
    9. 5.9 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Low Input Bias Current
      2. 6.3.2 Input Differential Voltage
      3. 6.3.3 Capacitive Load Drive
      4. 6.3.4 EMI Rejection
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Applications
      1. 7.2.1 Three-Terminal CO Gas Sensor
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
        3. 7.2.1.3 Application Curve
      2. 7.2.2 4-mA to 20-mA Loop Design
        1. 7.2.2.1 Application Curve
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 PSpice® for TI
        2. 8.1.1.2 TINA-TI™ Simulation Software (Free Download)
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

5.7 Electrical Characteristics: OPA391DCK and OPA2391YBJ

at VS = 1.7 V to 5.5 V, TA = 25°C, RL = 10 kΩ, and VCM = VS / 2 (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
OFFSET VOLTAGE
VOS Input offset voltage VS = 5.0 V ±10 ±45 µV
VCM = (V+) – 0.3 V,  VS = 5.0 V ±60 ±750
VCM = (V–) – 0.1 V ±15 ±80
TA = –40°C to +125°C(1) ±600
dVOS/dT Input offset voltage drift TA = 0°C to 85°C(1) ±1 ±5 µV/°C
TA = –40°C to +125°C(1) ±1.2 ±6
PSRR Power supply rejection ratio VCM = (V–) – 0.1 V 40 µV/V
INPUT BIAS CURRENT
IB Input bias current TA = 25°C(1) ±0.01 0.8 pA
TA = 0°C to 85°C(1) 5
TA = –40°C to +125°C(1) OPA391DCK 30
OPA2391YBJ 35
IOS Input offset current TA = 25°C(1) ±0.01 0.8 pA
TA = 0°C to 85°C(1) 5
TA = –40°C to +125°C(1) 30
NOISE
Input voltage noise f = 0.1 Hz to 10 Hz, VCM = (V–) 0.91 µVRMS
6.0 µVPP
en Input voltage noise density f = 10 Hz 130 nV/√Hz
f = 1 kHz 60
f = 10 kHz 55
in Input current noise density f = 1 kHz 30 fA/√Hz
INPUT VOLTAGE
VCM Common-mode voltage TA = –40°C to +125°C(1) (V–) – 0.1 (V+) + 0.1 V
CMRR Common-mode rejection ratio (V–) – 0.1 V ≤ VCM ≤ (V+) – 1.5 V OPA391DCK 89 100 dB
OPA2391YBJ 100
(V–) – 0.1 V ≤ VCM ≤ (V+) – 1.5 V, VS = 5.5 V 100 121
TA = –40°C to +125°C(1) 90 100
(V+) – 0.6 V ≤ VCM ≤ (V+) + 0.1 V 69
INPUT IMPEDANCE
Zid Differential input impedance 0.1 || 1 GΩ || pF
Zic Common-mode input impedance 1 || 1 TΩ || pF
OPEN-LOOP GAIN
AOL Open-loop voltage gain VS = 5.5 V (V–) + 0.1 V < VO < (V+) – 0.1 V,
VCM = (V–) –100 mV		 100 121 dB
(V–) + 0.45 V < VO < (V+) – 0.45 V,
VCM = (V–) –100 mV, RL = 2 kΩ		 100 121
VS = 1.7 V (V–) + 0.1 V < VO < (V+) – 0.1 V,
VCM = (V+) – 1.5 V		 90 113
(V–) + 0.45 V < VO < (V+) – 0.45 V,
VCM = (V+) – 1.5 V, RL = 2 kΩ		 90 107
FREQUENCY RESPONSE
UGB Unity-gain bandwidth G = 1 IOUT = 0 µA 450 kHz
IOUT = 0 µA, RL = 50 kΩ 0.85 MHz
IOUT = 100 µA 0.75
GBW Gain-bandwidth product No load 1 MHz
SR Slew rate G = –1, 4-V step 1 V/µs
tS Settling time To 0.1%, VS = 5.5 V, G = 1, 1-V step 8 µs
tOR Overload recovery time VIN × G = VS 15 µs
OUTPUT
VO Voltage output swing from rail No load 3 mV
10
RL = 2 kΩ 40
TA = –40°C to +125°C(1) OPA391DCK 10
OPA2391YBJ 12
ISC Short-circuit current VS = 5.5 V 45 60 mA
ZO Open-loop output impedance f = 1 MHz, no load 1.6 kΩ
POWER SUPPLY
IQ Quiescent current per amplifier VCM = (V+) – 1.5 V 23.5 30 µA
TA = –40°C to +125°C(1) 32
SHUTDOWN (OPA2391YBJ Only)
IQSD Quiescent current per amplifier(2) All amplifiers disabled, EN = (V–) 3.5 µA
VIH High-level input voltage(2) Amplifier enabled (V+) – 0.5 V
VIL Low-level input voltage(2) Amplifier disabled (V–) + 0.5 V
tON Amplifier enable time(2) G = 1, VOUT = 0.9 × VS/2(3) 75 µs
tOFF Amplifier disable time(2) G = 1, VOUT = 0.1 × VS/2(3) 4 µs
EN pin input leakage current(2) VIH = (V+) ±0.01 µA
VIL = (V–) –0.3
(1) Specification established from device population bench system measurements across multiple lots.   
(2) Specified by design and characterization; not production tested.
(3) Disable time (tOFF) and enable time (tON) are defined as the time between the 50% point of the signal applied to the EN pin and the
point at which the output voltage reaches the 10% (disable) or 90% (enable) level.