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INA381A4QDGSRQ1

AEC-Q100, 26-V, 350-kHz current sense amplifier with integrated overcurrent comparator

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

INA381A4QDGSRQ1
Datasheet:

INA381A4QDGSRQ1 Datasheet (PDF)
Common-mode voltage (max) (V):

26
Common-mode voltage (min) (V):

-0.2
Input offset (±) (max) (µV):

150
Input offset drift (±) (typ) (µV/°C):

0.2
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INA381A4QDGSRQ1 General Description

The INA381-Q1 includes both a 26-V common-mode, current-sensing amplifier and a high-speed comparator. This device detects overcurrent conditions by measuring the voltage developed across a current-shunt resistor and comparing that voltage to a user-defined threshold limit set by the comparator reference pin. The current-shunt monitor can measure differential voltage signals on common-mode voltages that vary from –0.2 V up to 26 V, independent of the supply voltage.

The open-drain alert output can be configured to operate in two modes: transparent or latched. In transparent mode, the output status follows the input state. In latched mode, the alert output is cleared only when the latch is reset. The standalone comparator large-signal alert response time is less than 2 µs, allowing for quick detection of overcurrent events. The total system overcurrent protection response time provided by the INA381-Q1 is less than 10 µs.

This device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 350 µA. The device is specified over an operating temperature range of –40°C to +125°C, and is available in the 10-pin VSSOP package.

Key Features

Qualified for Automotive Applications
AEC-Q100 Qualified With the Following Results:
- Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
Functional Safety-Capable
- Documentation available to aid functional safety system design
Common-mode input range: –0.2 V to +26 V
High accuracy amplifier:
- Offset voltage at T_A = 25°C
  - 500 µV (maximum) at V_CM = 12 V
  - 150 µV (maximum) at V_CM = 0 V
- Offset voltage drift: 1 µV/°C (maximum)
- Gain error: 1% (maximum) at 25°C
- Gain error drift: 20 ppm/°C (maximum)
Available amplifier gains:
- INA381A1-Q1: 20 V/V
- INA381A2-Q1: 50 V/V
- INA381A3-Q1: 100 V/V
- INA381A4-Q1: 200 V/V
Open-drain comparator:
- Hysteresis: 50 mV
- Propagation delay: 400 ns (typical)
- Alert threshold set through external reference voltage
- Supports transparent and latching modes
Package: VSSOP-10

Specifications

Product type	Analog output with integrated comparator	Common-mode voltage (max) (V)	26
Common-mode voltage (min) (V)	-0.2	Input offset (±) (max) (µV)	150
Input offset drift (±) (typ) (µV/°C)	0.2	Voltage gain (V/V)	20, 50, 100, 200
CMRR (min) (dB)	84	Bandwidth (kHz)	105, 150, 210, 350
Supply voltage (max) (V)	5.5	Supply voltage (min) (V)	2.7
Iq (max) (mA)	0.5	Number of channels	1
Comparators (#)	1	Gain error (%)	1
Gain error drift (±) (max) (ppm/°C)	20	Slew rate (V/µs)	2
Features	Alert Function, Low-side Capable	Rating	Automotive
TI functional safety category	Functional Safety-Capable	Operating temperature range (°C)	-40 to 125
feature-type		feature-number-of-elements-per-chip
feature-number-of-channels-per-chip	1	feature-rail-to-rail
feature-typical-gain-bandwidth-product-mhz		feature-maximum-voltage-gain-db
feature-minimum-cmrr-db		feature-minimum-psrr-db
feature-output-type		feature-maximum-input-offset-voltage-mv
feature-maximum-input-bias-current-ua		feature-maximum-input-resistance-mohm
feature-maximum-power-dissipation-mw		feature-packaging
feature-rad-hard		feature-pin-count	10
feature-cecc-qualified		feature-esd-protection
feature-escc-qualified		feature-military
feature-aec-qualified	Yes	feature-aec-qualified-number	AEC-Q100
feature-eccn-code	EAR99	feature-svhc
feature-svhc-exceeds-threshold	No