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INA2290A4IDGKT

Dual-channel, 2.7-V to 120-V, 1.1-MHz, ultra-precise current sense amplifier

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

INA2290A4IDGKT
Datasheet:

INA2290A4IDGKT Datasheet (PDF)
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
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INA2290A4IDGKT 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

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)	1.2	Number of channels	2
Comparators (#)	0	Gain error (%)	0.1, 0.15
Gain error drift (±) (max) (ppm/°C)	5	Slew rate (V/µs)	2
Features	Dual Channel, Ultra precise	Rating	Catalog
Operating temperature range (°C)	-40 to 125	feature-type	Current Sense Amplifier
feature-number-of-elements-per-chip	2	feature-number-of-channels-per-chip	2
feature-rail-to-rail		feature-typical-gain-bandwidth-product-mhz
feature-maximum-voltage-gain-db	46.02(Typ)	feature-minimum-cmrr-db	85(Typ)
feature-minimum-psrr-db	146.02(Typ)	feature-output-type
feature-maximum-input-offset-voltage-mv	0.012@5V	feature-maximum-input-bias-current-ua	30@5V
feature-maximum-input-resistance-mohm		feature-maximum-power-dissipation-mw
feature-packaging	Tape and Reel	feature-rad-hard
feature-pin-count	8	feature-cecc-qualified
feature-esd-protection		feature-escc-qualified
feature-military	No	feature-aec-qualified	No
feature-aec-qualified-number		feature-auto-motive	No
feature-p-pap	No	feature-eccn-code	EAR99
feature-svhc		feature-svhc-exceeds-threshold	No