INA303 36V, Bi-Directional, Low-/High-Side, Voltage Output CSA with Window Comparator | TI.com

INA303 (ACTIVE)

36V, Bi-Directional, Low-/High-Side, Voltage Output CSA with Window Comparator

 

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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INA303 Error Analysis

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

Parametrics

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Part number Order Common mode voltage (Max) (V) Common mode voltage (Min) (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)
INA303 Order now 36     0     30
50
80    
0.1     100
20
50    
0.1
0.15
0.2    
10     100     550
500
450    
5.5     2.7     1.1     1     2     Alert Function
Bi-directional
Low-side Capable    
Catalog     -40 to 125     TSSOP | 14     14TSSOP: 32 mm2: 6.4 x 5 (TSSOP | 14)    
INA300 Order now 36     0     650     0.1           96       5.5     2.7     0.135     1     1     Alert Function
Low-side Capable    
Catalog     -40 to 125     VSSOP | 10
WSON | 10    
10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10)
See datasheet (WSON)    
INA301 Order now 36     0     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    
Catalog     -40 to 125     VSSOP | 8     8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
INA302 Order now 36     0     30
50
80    
0.1     100
20
50    
0.1
0.15
0.2