SBOSAA6A May   2024  – December 2024 INA790B

PRODUCTION DATA  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Pin Configuration and Functions
  6. 5Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Integrated Shunt Resistor
      2. 6.3.2 Safe Operating Area
      3. 6.3.3 Short-Circuit Duration
      4. 6.3.4 Temperature Drift Correction
      5. 6.3.5 Enhanced PWM Rejection Operation
    4. 6.4 Device Functional Modes
      1. 6.4.1 Adjusting the Output With the Reference Pin
        1. 6.4.1.1 Reference Pin Connections for Unidirectional Current Measurements
        2. 6.4.1.2 Ground Referenced Output
        3. 6.4.1.3 Reference Pin Connections for Bidirectional Current Measurements
        4. 6.4.1.4 Output Set to Mid-Supply Voltage
      2. 6.4.2 Adjustable Gain Set Using External Resistors
        1. 6.4.2.1 Adjustable Unity Gain
      3. 6.4.3 Thermal Alert Function
  8. 7Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Calculating Total Error
        1. 7.1.1.1 Error Sources
        2. 7.1.1.2 Reference Voltage Rejection Ratio Error
        3. 7.1.1.3 External Adjustable Gain Error
        4. 7.1.1.4 Total Error Example 1
        5. 7.1.1.5 Total Error Example 2
        6. 7.1.1.6 Total Error Example 3
        7. 7.1.1.7 Total Error Curves
      2. 7.1.2 Signal Filtering
    2. 7.2 Typical Applications
      1. 7.2.1 High-Side, High-Drive, Solenoid Current-Sense Application
        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 Speaker Enhancements and Diagnostics Using Current Sense Amplifier
        1. 7.2.2.1 Design Requirements
        2. 7.2.2.2 Detailed Design Procedure
        3. 7.2.2.3 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. 8Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    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. 9Revision History

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DEK|15
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5.5 Electrical Characteristics

at TA = 25°C, VS = 5V, ISENSE = IS+ = 0A, VCM = VIN– = 48V, VFB = VOUT  (Adjustable Gain = 1),  and VREF = VS / 2 (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT
VCM Common-mode input range VIN+ = –4V to 110V, ISENSE = 0A,
TA = –40°C to +125°C		 –4 110 V
CMRR Common-mode rejection ratio VIN+ = –4V to 110V, ISENSE = 0A,
TA = –40°C to +125°C, INA790A		 ±25 ±79 µA/V
VIN+ = –4V to 110V, ISENSE = 0A,
TA = –40°C to +125°C, INA790B		 ±790 ±1250
CMRR Common-mode rejection ratio f = 50kHz ±56 mA/V
Ios Input referred offset current error ISENSE = 0A, INA790A ±5 ±30 mA
ISENSE = 0A, INA790B ±62.5 ±250
dIos/dT Input referred offset current error drift ISENSE = 0A, 
TA = –40°C to +125°C, INA790A		 ±0.125 ±0.625 mA/°C
ISENSE = 0A, 
TA = –40°C to +125°C, INA790B		 ±0.250 ±1.25
PSRR Power supply rejection ratio VS = 2.7V to 5.5V, VREF = 1V,
ISENSE = 0A, INA790A		 ±0.25 ±2.5 mA/V
VS = 2.7V to 5.5V, VREF = 1V,
ISENSE = 0A, INA790B		 ±2.5 ±25
IB Total input bias current IB++ IB-, ISENSE = 0A 45 66 90 µA
IFB Feed-back current ISENSE = 0A ±2 nA
ISENSE = 0A, TA = –40°C to +125°C ±6
INTEGRATED SHUNT RESISTOR
RSHUNT Internal Kelvin shunt resistance IN+ to IN-, TA = 25°C 400 µΩ
Pin to pin package resistance IS+ to IS-, TA = 25°C 425 560 650 µΩ
Pin to pin package inductance IS+ to IS-, TA = 25°C 2 nH
ISENSE Maximum Continuous Current TA = –40°C to +125°C ±50 A
Short time overload change ISENSE = 120A for 5 seconds ± 0.05 %
Change due to temperature cycle –65°C to 150°C, 500 cycles ± 0.1 %
Shunt resistance change to solder heat 260°C solder, 10 seconds ± 0.1 %
High temperature exposure change 1000 hours, TA = 150°C ± 0.015 %
OUTPUT
G Gain INA790A, INA790B  20 mV/A
G System Gain Error (shunt + amplifier) GND + 50mV ≤ VOUT  ≤ VS – 200mV,
TA = 25°C, ISENSE = ±50A, INA790A		 ±0.05 ±0.35 %
GND + 50mV ≤ VOUT  ≤ VS – 200mV,
TA = 25°C, ISENSE = ±5A, INA790A		 ±0.05 ±0.35
(1)GND + 50mV ≤ VOUT  ≤ VS – 200mV,
TA = 25°C, ISENSE = ±50A, INA790B		 ±0.3 ±1
GND + 50mV ≤ VOUT  ≤ VS – 200mV,
TA = 25°C, ISENSE = ±5A, INA790B		 ±0.1 ±0.625
G System Gain Error Drift (shunt + amplifier) TA = –40°C to +125°C, INA790A ±0.5 ±35 ppm/°C
TA = –40°C to +125°C, INA790B ±10 ±100
Power Coefficient Gain Non-Linearity Error (2)GND + 10mV ≤ VOUT ≤ VS – 200mV +1.5 ppm/A2
RVRR Reference voltage rejection ratio (input - referred) VREF = 0.5V to 4.5V ±2.5 ±12.5 mA/V
Maximum Capacitive Load No sustained oscillation 0.5 nF
VOLTAGE OUTPUT
Swing to VS Power Supply Rail RL = 10kΩ to GND, VREF = VS,
Adjustable Gain = 4, TA = –40°C to +125°C		 VS – 0.05 VS – 0.1 V
Swing to Ground RL = 10kΩ to GND, VREF = GND,
Adjustable Gain = 4, TA = –40°C to +125°C		 VGND + 5 VGND + 10 mV
Swing to Ground RL = 10kΩ to GND, VREF = GND, TA = –40°C to +125°C VGND + 1 VGND + 5 mV
FREQUENCY RESPONSE
BW Bandwidth (current sense amplifier only) –3dB Bandwidth, VFB = VOUT   1 MHz
–3dB Bandwidth, Adjustable Gain = 4   0.5 MHz
Propagation delay(3)  VIN+, VIN- = 48V, Adjustable Gain = 1,
VREF = 150mV, Load Step = 0A to 20A		 0.250 µs
Total Settling time (current in to out) VIN+, VIN- = 48V, Adjustable Gain = 1, 
VREF =150mV, Load Step = 0A to 20A,
Output settles to 1%		 5 µs
SR Slew Rate VFB = VOUT 1.8 V/µs
Adjustable Gain = 4 1.5 V/µs
NOISE
Current Noise Density 150 µA/√Hz
POWER SUPPLY
IQ Quiescent current 3.5 4.25 mA
TA = –40°C to +125°C 4.5 mA
TEMPERATURE
TAlert Thermal Alert Threshold Rpullup = 10kΩ,  160 °C
VOLAlert Thermal Alert Low-level output voltage Rpullup = 10kΩ,  200 mV
(1) This is inclusive of Power Coefficient Gain Non-linearity Error
(2) ISENSE = ± 5A to ± 50A, VOUT = VREF ± 1V
(3) Propagation delay is difference of time between 10% of load step to 10% of final output settling value