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See Technical Specifications

INA190A4IRSWT

40-V, bidirectional, ultraprecise current sense amplifier with picoamp IB & ENABLE

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

INA190A4IRSWT
Datasheet:

INA190A4IRSWT Datasheet (PDF)
Series:

Zero-Drift
Amplifier Type:

Current Sense
Number of Circuits:

1
Output Type:

Rail-to-Rail
EDA/CAD Models:

Request Free CAD Models for INA190A4IRSWT

Email: [email protected]

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Tel: +852 95804164

INA190A4IRSWT General Description

The INA190 is a low-power, voltage-output, current-shunt monitor (also called a current-sense amplifier). This device is commonly used for overcurrent protection, precision current measurement for system optimization, or in closed-loop feedback circuits. The INA190 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage.

The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the microamp range. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement. This feature allows for smaller sense resistors with lower power loss, while still providing accurate current measurements.

The INA190 operates from a single 1.7-V to 5.5-V power supply, and draws a maximum of 65 µA of supply current when enabled; only 0.1 µA when disabled. Five fixed gain options are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The device is specified over the operating temperature range of –40°C to +125°C, and offered in UQFN, SC70, and SOT-23 packages.

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Key Features

Low input bias currents: 500 pA (typ)
(enables microamp current measurement)
Low power:
- Low supply voltage, V_S: 1.7 V to 5.5 V
- Low shutdown current: 100 nA (max)
- Low quiescent current: 50 µA at 25°C (typ)
Accuracy:
- Common-mode rejection ratio: 132 dB (min)
- Gain error: ±0.2% (A1 device)
- Gain drift: 7 ppm/°C (max)
- Offset voltage, V_OS: ±15 µV (max)
- Offset drift: 80 nV/°C (max)
Wide common-mode voltage: –0.2 V to +40 V
Bidirectional current sensing capability
Gain options:
- INA190A1: 25 V/V
- INA190A2: 50 V/V
- INA190A3: 100 V/V
- INA190A4: 200 V/V
- INA190A5: 500 V/V

Specifications

Category	Integrated Circuits (ICs)LinearAmplifiersInstrumentation, OP Amps, Buffer Amps	Series	Zero-Drift
Amplifier Type	Current Sense	Number of Circuits	1
Output Type	Rail-to-Rail	Slew Rate	0.25V/µs
Gain Bandwidth Product	33 kHz	-3db Bandwidth	20 kHz
Current - Input Bias	500 pA	Voltage - Input Offset	2 µV
Current - Supply	40µA	Voltage - Supply Span (Min)	1.7 V
Voltage - Supply Span (Max)	5.5 V	Operating Temperature	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount	Base Product Number	INA190
Product type	Analog output	Common-mode voltage (max) (V)	40
Common-mode voltage (min) (V)	-0.2	Input offset (±) (max) (µV)	15
Input offset drift (±) (typ) (µV/°C)	0.01	Voltage gain (V/V)	25, 50, 100, 200, 500
CMRR (min) (dB)	132	Bandwidth (kHz)	27, 33, 35, 37, 45
Supply voltage (max) (V)	5.5	Supply voltage (min) (V)	1.7
Iq (max) (mA)	0.09	Number of channels	1
Comparators (#)	0	Gain error (%)	0.2, 0.3, 0.4
Gain error drift (±) (max) (ppm/°C)	7	Slew rate (V/µs)	0.3
Features	Bidirectional, Low-side Capable, Ultra precise	Rating	Catalog
Operating temperature range (°C)	-40 to 125	feature-type	Current Sense Amplifier
feature-number-of-elements-per-chip	1	feature-number-of-channels-per-chip	1
feature-rail-to-rail	Rail to Rail Output	feature-typical-gain-bandwidth-product-mhz
feature-maximum-voltage-gain-db	46.02(Typ)	feature-minimum-cmrr-db	132
feature-minimum-psrr-db	120(Typ)	feature-output-type
feature-maximum-input-offset-voltage-mv	0.015@5V	feature-maximum-input-bias-current-ua	0.003@5V
feature-maximum-input-resistance-mohm		feature-maximum-power-dissipation-mw
feature-packaging	Tape and Reel	feature-rad-hard
feature-pin-count	10	feature-cecc-qualified
feature-esd-protection		feature-escc-qualified
feature-military	No	feature-aec-qualified	No
feature-aec-qualified-number		feature-eccn-code	EAR99
feature-svhc		feature-svhc-exceeds-threshold	No