High-Voltage, Programmable Gain Difference Amplifier - INA146

INA146 (ACTIVE)

High-Voltage, Programmable Gain Difference Amplifier

 

Description

The INA146 is a precision difference amplifier that can be used to accurately attenuate high differential voltages and reject high common-mode voltages for compatibility with common signal processing voltage levels. High-voltage capability also affords inherent input protection. The input common-mode range ex-tends beyond both supply rails, making the INA146 well-suited for both single and dual supply applica-tions.

On-chip precision resistors are laser-trimmed to achieve accurate gain and high common-mode rejection. Ex-cellent TCR tracking of these resistors assures contin-ued high precision over temperature.

A 10:1 difference amplifier provides 0.1V/V gain when the output amplifier is used as a unity-gain buffer. In this configuration, input voltages up to ±100V can be measured. Gains greater than 0.1V/V can be set with an external resistor pair without affect-ing the common-mode input range.

The INA146 is available in the SO-8 surface-mount package specified for the extended industrial tempera-ture range, -40°C to +85°C.

Features

  • HIGH COMMON-MODE VOLTAGE:
    • +40V at V S = +5V
    • ±100V at V S = ±15V
  • DIFFERENTIAL GAIN = 0.1V/V TO 100V/V:
    • Set with External Resistors
  • LOW QUIESCENT CURRENT: 570µA
  • WIDE SUPPLY RANGE:
    • Single Supply: 4.5V to 36V
    • Dual Supplies: ±2.25V to ±18V
  • LOW GAIN ERROR: 0.025%
  • HIGH CMR: 80dB
  • SO-8 PACKAGE

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Parametrics Compare all products in Difference Amplifiers

 
Number of Channels (#)
Vs (Min) (V)
Vs (Max) (V)
CMRR (Min) (dB)
Common Mode Input Low (Min) (V)
Common Mode Input High (Max) (V)
Input Offset (+/-) (Max) (uV)
Iq (Typ) (mA)
Small Signal Bandwidth (Typ) (MHz)
Slew Rate (Typ) (V/us)
Gain (Min) (V/V)
Gain (Max) (V/V)
Gain Error (+/-) (Max) (%)
Rating
Operating Temperature Range (C)
Input Offset Drift (+/-) (Max) (uV/C)
Gain Drift (Max) (ppm/C)
Pin/Package
INA146 INA117 INA148 INA148-Q1 INA149
1    1    1    1    1   
2.76    10    2.7    2.7    4   
36    36    36    36    36   
76    86    70    70    90   
-100    -200    -200    -200    -275   
100    200    200    200    275   
5000    1000    5000    5000    1100   
0.6    2    0.6    0.6    0.81   
0.5    0.2    0.1    0.1    0.5   
0.45    2.6    1    1    5   
0.1    1    1    1    1   
100    1    1    1    1   
0.1    0.05    0.075    0.076    0.02   
Catalog    Catalog    Catalog    Automotive    Catalog   
-40 to 85    -40 to 85    -55 to 125    -40 to 125    -40 to 125   
100    20    100    100    10   
1    10    3    3    10   
8SOIC    8PDIP
8SOIC   
8SOIC    8SOIC    8SOIC