Product Details

describe:

The INA149 is a precision unity gain differential amplifier with a very high input common mode voltage range. It is a monolithic device consisting of a precision operational amplifier and an integrated thin film resistor network. The INA149 can accurately measure small differential voltages in the presence of common-mode signals up to ±275 V. The INA149 inputs are protected against transient common-mode or differential overloads up to 500 V.

In many applications where galvanic isolation is not required, the INA149 can replace isolation amplifiers. This capability eliminates expensive isolated input-side power supplies and associated ripple, noise, and quiescent current. The INA149's excellent 0.0005% nonlinearity and 500 kHz bandwidth outperform conventional isolated AD5282BRU50 amplifiers.

The INA149 is pin-compatible with the INA117 and INA148 high common-mode voltage amplifiers and offers superior performance over both devices. The INA149 is available in a SOIC-8 package and is specified over the extended industrial temperature range of –40°C to +125°C.

characteristic:

●Common mode voltage range: ±275 V

●Minimum CMRR: 90 dB from –40°C to +125°C

●DC Specifications:

—Maximum offset voltage: 1100 μV

—Maximum offset voltage drift: 15 μV/°C

—Maximum gain error: 0.02%

—Maximum gain error drift: 10 ppm/°C

—Maximum gain nonlinearity: 0.001% FSR

●AC performance:

- Bandwidth: 500 kHz

— Typical slew rate: 5 V/μs

Wide power supply range: ±2.0 V to ±18 V

—Maximum quiescent current: 900 μA

— Output swing on ±15V supplies: ±13.5V

●Input protection:

—Common mode: ±500 V

— Differential: ±500 V

parameter:

Number of channels (#): 1

Vs (minimum) (V): 4

Vs (max) (V): 36

CMRR (minimum) (dB): 90

Common Mode Input Low (Min) (V): -275

Common Mode Input High (Max) (V): 275

Input Offset (+/-) (Max) (uV): 1100

Iq (typ) (mA): 0.81

Small Signal Bandwidth (Typ) (MHz): 0.5

Slew rate (typ) (V/us): 5

Gain (Min) (V/V): 1

Gain (Max) (V/V): 1

Gain Error (+/-) (Max) (%): 0.02

Operating temperature range (°C): -40 to 125

Gain Drift (Max) (ppm/C): 10