SBOS069A October   1997  – December 2024 INA122

PRODUCTION DATA  

  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 Recommended Operating Conditions
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics
    5. 5.5 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 Setting the Gain
      2. 6.3.2 Input Common-Mode Range
      3. 6.3.3 Input Protection
      4. 6.3.4 Output Current Range
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Offset Trimming
      2. 7.1.2 Input Bias Current Return Path
    2. 7.2 Typical Application
      1. 7.2.1 Resistive-Bridge Pressure Sensor
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
        3. 7.2.1.3 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 (Free Software Download)
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • D|8
  • P|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5.4 Electrical Characteristics

at TA = 25°C, VS = +5V, RL = 20kΩ connected to VS/2, VREF = 0V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT
VOS Offset voltage (RTI) INA122P, U ±100 ±250 µV
INA122PA, UA ±150 ±500
Offset voltage drift (RTI) TA = –40°C to +85°C INA122P, U ±1 ±3 µV/℃
INA122PA, UA ±1 ±5
PSRR Power-supply rejection ratio (RTI)  VS = 2.2V to 36V INA122P, U 10 30 µV/V
INA122PA, UA 10 100
VCM Operating input range(1) 0 3.4 V
CMRR Common-mode rejection ratio (RTI) VCM = 0V to 3.4V INA122P, U 83 96 dB
INA122PA, UA 76 96
Differential impedance 100 || 3 GΩ || pF
Common-mode impedance 100 || 3
BIAS CURRENT
IB Input bias current VCM = VS / 2 INA122P, U –10 –25 nA
INA122PA, UA –10 –50 nA
IOS Input offset current VCM = VS / 2 INA122P, U ±1 ±2 nA
INA122PA, UA ±1 ±5
Input offset current drift TA = –40°C to +85°C INA122P, U ±40 pA/℃
INA122PA, UA ±40
NOISE VOLTAGE
eNI Voltage noise (RTI) f = 10Hz 110 nV/√Hz
f = 100Hz 100
f = 1kHz 60
fB = 0.1Hz to 10Hz 2.7 µVPP
iNI Current noise (RTI) f = 1kHz 80 fA/√Hz
fB = 0.1Hz to 10Hz 2 pAPP
GAIN
Gain equation 5 + (200kΩ / RG) V/V
G Gain 5 10000 V/V
GE Gain error G = 5, VO = ±10V INA122P, U ±0.05 ±0.1 %
INA122PA, UA ±0.05 ±0.15
G = 100, VO = ±10V INA122P, U ±0.3 ±0.5
INA122PA, UA ±0.3 ±1
Gain vs temperature(2) G = 5 ±5 ±10 ppm/°C
G = 100 ±25 ±100
Gain nonlinearity G = 100, VO = –14.85V to +14.9V INA122P, U ±0.005 ±0.012 % of FSR
INA122PA, UA ±0.005 ±0.024
OUTPUT
Positive output voltage swing VS = ±15V (V+) - 0.1 (V+) - 0.05 V
Negative output voltage swing VS = ±15V (V–) + 0.15 (V-) + 0.1 V
Load capacitance stability 1000 pF
ISC Short-circuit current Continuous to VS / 2 +3 / –30 mA
FREQUENCY RESPONSE
BW Bandwidth, –3dB G = 5 100 kHz
G = 100 3.5
G = 500 0.9
SR Slew rate G = 5, VO = ±10V Rising 0.08 V/µs
Falling 0.12
Overload recovery 50 % overdrive 22 µs
tS Settling time 0.01% G = 5 350 µs
G = 100 450
G = 500 1800
POWER SUPPLY
IQ Quiescent current IO = 0A 60 85 µA
(1) Input voltage range of the INA122 input stage. The input range depends on the common-mode voltage, differential voltage, gain, and reference voltage. See Typical Characteristic curves Figure 5-5 and Figure 5-6 for more information.
(2) The values specified for G > 5 do not include the effects of the external gain-setting resistor, RG.