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See Technical Specifications

INA290A1IDCKT

Current Sense Amplifier 1 Circuit SC-70-5

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

INA290A1IDCKT
Datasheet:

INA290A1IDCKT Datasheet (PDF)
Amplifier Type:

Current Sense
Number of Circuits:

1
Slew Rate:

2V/µs
-3db Bandwidth:

1.1 MHz
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INA290A1IDCKT General Description

The INAx290 is an ultra-precise, current-sense amplifier that can measure voltage drops across shunt resistors over a wide common-mode range from 2.7 V to 120 V. The ultra-precise current measurement accuracy is achieved thanks to the combination of an ultra-low offset voltage of ±12 µV (maximum), a small gain error of ±0.1% (maximum), and a high DC CMRR of 160 dB (typical). The INAx290 is not only designed for DC current measurement, but also for high-speed applications (such as fast overcurrent protection, for example) with a high bandwidth of 1.1 MHz (at gain of 20 V/V) and an 85-dB AC CMRR (at 50 kHz).

The INAx290 provides the capability to make ultra- precise current measurements by sensing the voltage drop across a shunt resistor over a wide common- mode range from 2.7 V to 120 V. The INAx290 devices come in highly space-efficient packages. The single-channel INA290 device is featured in the SC-70 package, the dual-channel INA2290 device is available in the MSOP-8 package, and the quad-channel INA4290 device is available in the 4 mm x 4 mm QFN package.

The INAx290 operates from a single 2.7-V to 20-V supply with the single channel device only drawing 370-µA supply current per channel (typical). The devices are available with five gain options: 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V. The low offset of the zero-drift architecture enables current sensing with low ohmic shunts as specified over the extended operating temperature range (−40°C to +125°C).

Key Features

Wide common-mode voltage:
- Operational voltage: 2.7 V to 120 V
- Survival voltage: −20 V to +122 V
Excellent CMRR:
- 160-dB DC
- 85-dB AC at 50 kHz
Accuracy
- Gain:
  - Gain error: ±0.1% (maximum)
  - Gain drift: ±5 ppm/°C (maximum)
- Offset:
  - Offset voltage: ±12 µV (maximum)
  - Offset drift: ±0.2 µV/°C (maximum)
Available gains:
- A1 devices: 20 V/V
- A2 devices: 50 V/V
- A3 devices: 100 V/V
- A4 devices: 200 V/V
- A5 devices: 500 V/V
High bandwidth: 1.1 MHz
Slew rate: 2 V/µs
Quiescent current: 370 µA (per channel)

Specifications

Category	Integrated Circuits (ICs)LinearAmplifiersInstrumentation, OP Amps, Buffer Amps	Series	-
Amplifier Type	Current Sense	Number of Circuits	1
Output Type	-	Slew Rate	2V/µs
-3db Bandwidth	1.1 MHz	Current - Input Bias	20 µA
Voltage - Input Offset	5 µV	Current - Supply	370µA
Voltage - Supply Span (Min)	2.7 V	Voltage - Supply Span (Max)	20 V
Operating Temperature	-40°C ~ 125°C	Mounting Type	Surface Mount
Base Product Number	INA290	Product type	Analog output
Common-mode voltage (max) (V)	120	Common-mode voltage (min) (V)	2.7
Input offset (±) (max) (µV)	12, 15, 20, 25	Input offset drift (±) (typ) (µV/°C)	0.2
Voltage gain (V/V)	20, 50, 100, 200, 500	CMRR (min) (dB)	140
Bandwidth (kHz)	800, 850, 900, 1100	Supply voltage (max) (V)	20
Supply voltage (min) (V)	2.7	Iq (max) (mA)	0.6
Number of channels	1	Comparators (#)	0
Gain error (%)	0.1, 0.15	Gain error drift (±) (max) (ppm/°C)	5
Slew rate (V/µs)	2	Features	Ultra precise
Rating	Catalog	Operating temperature range (°C)	-40 to 125