Overcurrent protection high-speed, precision current sense amplifier with integrated comparator - INA301

INA301 (ACTIVE)

Overcurrent protection high-speed, precision current sense amplifier with integrated comparator

 

Description

The INA301 includes both a high common-mode, current-sensing amplifier and a high-speed comparator configured to detect overcurrent conditions through measuring the voltage developed across a current-sensing or current-shunt resistor and comparing that voltage to a defined threshold limit. The device features an adjustable limit threshold range that is set using a single external limit-setting resistor. This current-shunt monitor can measure differential voltage signals on common-mode voltages that can vary from 0 V up to 36 V, independent of the supply voltage.

The open-drain alert output can be configured to operate in either a transparent mode where the output status follows the input state or in a latched mode where the alert output is cleared when the latch is reset. The device alert response time is under 1 µs, allowing for quick detection of overcurrent events.

This device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 700 µA. The device is specified over the extended operating temperature range (–40°C to +125°C), and is available in an 8-pin VSSOP package.

Features

  • Wide Common-Mode Input Range: 0 V to 36 V
  • Dual Output: Amplifier and Comparator Output
  • High Accuracy Amplifier:
    • Offset Voltage: 35 µV (Max)
    • Offset Voltage Drift: 0.5 µV/°C (Max)
    • Gain Error: 0.1% (Max)
    • Gain Error Drift: 10 ppm/°C
  • Available Amplifier Gains:
    • INA301A1: 20 V/V
    • INA301A2: 50 V/V
    • INA301A3: 100 V/V
  • Programmable Alert Threshold Set Through a Single Resistor
  • Total Alert Response Time: 1 µs
  • Open-Drain Output With Latching Mode
  • Package: VSSOP-8

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Parametrics Compare all products in Current Sense Amplifiers with Comparator

 
Common Mode Voltage (Max) (V)
Input Offset (+/-) (Max) (uV)
Input Offset Drift (+/-) (Typ) (uV/C)
Gain (V/V)
Gain Error (%)
CMRR (Min) (dB)
Bandwidth (kHz)
Number of Channels (#)
Response Time (Typ) (µs)
Hysteresis Input (Typ) (mV)
Supply Voltage (Max) (V)
Supply Voltage (Min) (V)
Iq (Max) (mA)
Features
Rating
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
Common Mode Voltage (Min) (V)
Gain Error Drift (Max) (ppm/°C)
PSRR (Typ) (uV/V)
Specified Common Mode Voltage (V)
Specified Power Supply Voltage (V)
INA301 INA300 INA302 INA303
36    36    36    36   
35
50
125   
650    30
50
80   
30
50
80   
0.1    0.1    0.1    0.1   
20
50
100   
  20
50
100   
20
50
100   
0.1
0.15
0.2   
  0.1
0.15
0.2   
0.1
0.15
0.2   
100    96    100    100   
550
500
450   
  550
500
450   
550
500
450   
1    1    2    2   
1    10
50
100   
1    1   
20
50
100   
2
4
8   
100    100   
5.5    5.5    5.5    5.5   
2.7    2.7    2.7    2.7   
0.7    0.135    1.1    1.1   
Alert Function
Low-side Capable   
Alert Function
Low-side Capable   
Alert Function
Bi-directional
Low-side Capable   
Alert Function
Bi-directional
Low-side Capable   
Catalog    Catalog    Catalog    Catalog   
-40 to 125    -40 to 125    -40 to 125    -40 to 125   
VSSOP    VSSOP
WSON   
TSSOP    TSSOP   
8VSSOP: 15 mm2: 4.9 x 3(VSSOP)    10VSSOP: 15 mm2: 4.9 x 3(VSSOP)
See datasheet (WSON)   
14TSSOP: 32 mm2: 6.4 x 5(TSSOP)    14TSSOP: 32 mm2: 6.4 x 5(TSSOP)   
0    0    0    0   
10      10    10   
0.1      0.1    0.1   
12      12    12   
5      5    5   

Other qualified versions of INA301

Version Part Number Definition
Automotive INA301-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects

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INA301 Error Analysis

0.001m ≤ 
 mOhm ≤ 100m
0.0001 ≤ 
A
A ≤ 100 
2.7 ≤ 
V ≤ 5.5
0 ≤ 
V ≤ 36
-40 ≤ 
C ≤ 125