Overcurrent Protection High-Speed, Precision Current Sense Amplifier With Integrated Comparators - INA302

INA302 (ACTIVE)

Overcurrent Protection High-Speed, Precision Current Sense Amplifier With Integrated Comparators

 

Description

The INA302 and INA303 devices feature a high common-mode, bidirectional, current-sensing amplifier and two high-speed comparators to detect out-of-range current conditions. The INA302 comparators are configured to detect and respond to overcurrent conditions. The INA303 comparators are configured to respond to both over- and undercurrent conditions in a windowed configuration. The device features 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.

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.

This device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 950 µA. The device is specified over the extended operating temperature range (–40°C to +125°C), and is available in a 14-pin TSSOP package.

Features

  • Wide Common-Mode Input Range: –0.1 V to 36 V
  • Dual Comparator Outputs:
    • INA302: Two Independent Overlimit Alerts
    • INA303: 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, INA303A1: 20 V/V
    • INA302A2, INA303A2: 50 V/V
    • INA302A3, INA303A3: 100 V/V

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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)
INA302 INA300 INA301 INA303
36    36    36    36   
30
50
80   
650    35
50
125   
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
440
400   
  550
500
450   
550
500
450   
2    1    1    2   
1    10
50
100   
1    1   
100    2
4
8   
20
50
100   
100   
5.5    5.5    5.5    5.5   
2.7    2.7    2.7    2.7   
1.1    0.135    0.7    1.1   
Alert Function
Bi-directional
Low-side Capable   
Alert Function
Low-side Capable   
Alert Function
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   
TSSOP    VSSOP
WSON   
VSSOP    TSSOP   
14TSSOP: 32 mm2: 6.4 x 5(TSSOP)    10VSSOP: 15 mm2: 4.9 x 3(VSSOP)
See datasheet (WSON)   
8VSSOP: 15 mm2: 4.9 x 3(VSSOP)    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   

INA302 Error Analysis

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