Overview
The INA225AQDGKRQ1 is a voltage-output, current-sense amplifier produced by Texas Instruments. This device is designed to sense drops across current-sensing resistors at common-mode voltages ranging from 0 V to 36 V, independent of the supply voltage. It operates as a bidirectional, current-shunt monitor, allowing an external reference to measure current flowing in both directions across a current-sensing resistor. The INA225AQDGKRQ1 is AEC-Q100 qualified, ensuring its suitability for automotive applications, and it is functional safety-capable, aiding in the design of safety-critical systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | VSSOP (DGK) | - |
| Pins | 8 | - |
| Operating Temperature Range | -40 to 125 | °C |
| Supply Voltage Range | 2.7 to 36 | V |
| Quiescent Current | 350 | μA |
| Offset Voltage | ±150 | μV |
| Offset Voltage Drift | 0.5 | μV/°C |
| Gain Accuracy (over temperature) | ±0.15% (25 V/V, 50 V/V), ±0.2% (100 V/V), ±0.3% (200 V/V) | - |
| Gain Drift | 10 ppm/°C | - |
| Bandwidth | 250 kHz (gain = 25 V/V) | - |
| Programmable Gains | 25 V/V, 50 V/V, 100 V/V, 200 V/V | - |
Key Features
- AEC-Q100 qualified with temperature grade 1: –40 °C to +125 °C
- Functional Safety-Capable with documentation available to aid in functional safety system design
- Wide common-mode range: 0 V to 36 V
- Low-offset, zero-drift architecture with precision gain values
- Programmable gains using two gain-select terminals (GS0 and GS1): 25 V/V, 50 V/V, 100 V/V, and 200 V/V
- High accuracy measurements over the entire operating temperature range
- Single +2.7-V to +36-V power supply operation
- Maximum quiescent current of 350 μA
Applications
- Automotive lighting systems
- Body control modules
- Motor control systems
- Valve control systems
- Cluster and central control modules
Q & A
- What is the operating temperature range of the INA225AQDGKRQ1?
The operating temperature range is –40 °C to +125 °C.
- What are the programmable gain settings for the INA225AQDGKRQ1?
The device offers programmable gains of 25 V/V, 50 V/V, 100 V/V, and 200 V/V using the GS0 and GS1 terminals.
- What is the maximum quiescent current of the INA225AQDGKRQ1?
The maximum quiescent current is 350 μA.
- What is the common-mode range of the INA225AQDGKRQ1?
The common-mode range is from 0 V to 36 V.
- Is the INA225AQDGKRQ1 AEC-Q100 qualified?
Yes, the INA225AQDGKRQ1 is AEC-Q100 qualified with temperature grade 1.
- What is the bandwidth of the INA225AQDGKRQ1 at a gain of 25 V/V?
The bandwidth at a gain of 25 V/V is 250 kHz.
- What type of package does the INA225AQDGKRQ1 come in?
The device is offered in an 8-pin VSSOP (DGK) package.
- Can the INA225AQDGKRQ1 be used in safety-critical applications?
Yes, the device is functional safety-capable with available documentation to aid in the design of safety-critical systems.
- What is the offset voltage of the INA225AQDGKRQ1?
The maximum offset voltage is ±150 μV for all gains.
- What are some typical applications of the INA225AQDGKRQ1?
Typical applications include automotive lighting, body control modules, motor control, valve control, and cluster and central control modules.
