INA302-Q1 AEC-Q100, 36V, Bi-Directional, Low-/High-Side, Voltage Output CSA with Dual Comparators

Description

The INA302-Q1 and INA303-Q1 (INA30x-Q1) devices feature a high common-mode, bidirectional, current-sensing amplifier and two high-speed comparators to detect out-of-range current conditions. The INA302-Q1 comparators are configured to detect and respond to overcurrent conditions. The INA303-Q1 comparators are configured to respond to both overcurrent and undercurrent conditions in a windowed configuration. These devices feature an adjustable limit threshold range for each comparator set using an external limit-setting resistor. These current-shunt monitors can measure differential voltage signals on common-mode voltages that can vary from –0.1 V up to +36 V, independent of the supply. In addition, these devices will survive with common-mode voltages as high as 40 V.

The open-drain alert outputs can be configured to operate in either a transparent mode (output status follows the input state), or in a latched mode (alert output is cleared when the latch is reset). The alert response time for comparator 1 is under 1 µs, and the alert response for comparator 2 is set through an external capacitor ranging from 2 µs to 10 s.

These devices operate from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 950 µA. The devices are specified over the extended operating temperature range of –40°C to +125°C, and are available in a 14-pin TSSOP package.

Features

AEC-Q100 qualified for automotive applications
- Temperature grade 1: –40°C ≤ T_A ≤ +125°C
- HBM ESD classification level 2
- CDM ESD classification level C6
Wide common-mode input range: –0.1 V to +36 V
Dual comparator outputs:
- INA302-Q1: Two independent overlimit alerts
- INA303-Q1: Window comparator
- Threshold levels set individually
- Comparator 1 alert response: 1 µs
- Comparator 2 adjustable delay: 2 µs to 10 s
- Open-drain outputs with independent latch control modes
High accuracy amplifier:
- Offset voltage: 30 µV (max, A3 version)
- Offset voltage drift: 0.5 µV/°C (max)
- Gain error: 0.15% (max, A3 version)
- Gain error drift: 10 ppm/°C
Available amplifier gains:
- INA302A1-Q1, INA303A1-Q1: 20 V/V
- INA302A2-Q1, INA303A2-Q1: 50 V/V
- INA302A3-Q1, INA303A3-Q1: 100 V/V

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INA302-Q1 Error Analysis

Ideal Shunt Resistor:

0.001m ≤

mOhm ≤ 100m

Sensed Current Range:

0.0001 ≤

A ≤ 100

Supply Voltage:

2.7 ≤

V ≤ 5.5

Common Mode Voltage:

0 ≤

V ≤ 36

Operating Temperature:

-40 ≤

C ≤ 125

X Scale: Linear Logarithmic

Guide

Ideal Shunt Resistor : An ideal shunt resistor is a resistor with zero percent tolerance error and has zero variation over temperature

Sensed Current Range: These fields allow the user to select an operational current range they are interested in.

Common Mode Voltage: The Common Mode voltage range needed is determined by the node voltage the device is connected to where the current is being measured.

Supply Voltage: Supply voltage is the voltage required for device operation.

Operating Temperature: The error curve will be generated at room temperature (25°C) and the specified temperature.

(The limits for each parameter are preset by the selected TI device)

Help

NOTE 1:

This error tool calculates the root sum square (RSS) error as opposed to worst case error. Worst case error assumes all error sources are simultaneously at the worst value. This is an unlikely scenario. The RSS error methodology is a more realistic worst case system error condition.

NOTE 2:

The room temperature curve is calculated from the following equation:

e = ( V _OS V _SHUNT + |V _CMSYS - V_CMDS| x CMRR V _SHUNT + |V _SSYS - V_SDS| x PSRR V _SHUNT ) 2 + (e_GN) 2

V_OS		Amplifier offset voltage at 25 ^° C
V_SHUNT		Sensed current multiplied by shunt resisto
V_CMSYS		Chosen common mode voltage
V_CMDS		Data sheet specified common mode voltage for V_OS
CMRR		Amplifier specified common mode rejection in V/V
V_SSYS		Chosen supply voltage
V_SDS		Data sheet specified supply voltage for V_OS
e_GN		Amplifier gain error

For the at temperature curve, the drift specified in the data sheet is added to both the V_OS term and the e_GN term.

Additional error sources such as amplifier linearity, bias current, and reference voltage input are not included in this analysis. The effect of these errors sources can be found in the individual device datasheets.

More information on calculating error can be found in the Getting Started with Current Sense Amplifier Video Training Series.

Parametrics

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Part number	Order	Common mode voltage (Max) (V)	Input offset (+/-) (Max) (uV)	Input offset drift (+/-) (Typ) (uV/C)	Gain (V/V)	Gain error (%)	Gain error drift (+/-) (Max) (ppm/°C)	CMRR (Min) (dB)	Bandwidth (kHz)	Supply voltage (Max) (V)	Supply voltage (Min) (V)	Iq (Max) (mA)	Number of channels (#)	Comparators (#)	Features	Rating	Operating temperature range (C)	Package Group	Package size: mm2:W x L (PKG)
INA302-Q1	Order now	36	30 50 80	0.1	100 20 50	0.1 0.15 0.2	10	100	550 440 400	5.5	2.7	1.1	1	2	Alert Function Bi-directional Low-side Capable	Automotive	-40 to 125	TSSOP \| 14	14TSSOP: 32 mm2: 6.4 x 5 (TSSOP \| 14)
INA300-Q1	Order now	36	650	0.1				96		5.5	2.7	0.135	1	1	Alert Function Low-side Capable	Automotive	-40 to 125	VSSOP \| 10	10VSSOP: 9 mm2: 3 x 3 (VSSOP \| 10)
INA301-Q1	Order now	36	35 50 125	0.1	100 20 50	0.1 0.15 0.2	10	100	550 500 450	5.5	2.7	0.7	1	1	Alert Function Low-side Capable	Automotive	-40 to 125	VSSOP \| 8	8VSSOP: 15 mm2: 4.9 x 3 (VSSOP \| 8)
INA303-Q1	Order now	36	30 50 80	0.1	100 20 50	0.1 0.15 0.2

INA302-Q1 (ACTIVE) AEC-Q100, 36V, Bi-Directional, Low-/High-Side, Voltage Output CSA with Dual Comparators

Description

Features

Guide

Help

Parametrics