Overview
The AD8417WBRZ-RL, produced by Analog Devices Inc., is a high voltage, high resolution current sense amplifier. It is designed to accurately amplify small differential current shunt voltages in the presence of rapidly changing common-mode voltages. This amplifier features an initial gain of 60 V/V with a maximum ±0.3% gain error over the entire temperature range, making it highly accurate for various applications. The AD8417 is available in several package options, including 8-lead MSOP, 8-lead SOIC_N, and a 10-lead MSOP pinout engineered for failure mode and effects analysis (FMEA) tolerance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Gain | 60 V/V | |
| Gain Error | ±0.3% | |
| Operating Temperature Range | −40°C to +125°C (AD8417WB, AD8417B), −40°C to +150°C (AD8417WH) | °C |
| Supply Voltage Range | 2.7 V to 5.5 V | V |
| Quiescent Current | 4.1 mA (AD8417WB, AD8417B), 4.2 mA (AD8417WH) | mA |
| Common-Mode Rejection Ratio (CMRR) | 86 dB (dc to 10 kHz) | dB |
| Small Signal Bandwidth | 250 kHz | kHz |
| Slew Rate | 1 V/µs | V/µs |
| Input Offset Drift | < 0.4 µV/°C | µV/°C |
| Output Voltage Range | 0.045 VS − 0.035 V (RL = 25 kΩ) | V |
| Output Resistance | 2 Ω | Ω |
Key Features
- Bidirectional Operation: Measures current in both directions, making it suitable for applications like H-bridge motor control.
- High Common-Mode Rejection: Offers CMRR of 86 dB from dc to 10 kHz, ensuring accurate measurements despite rapidly changing common-mode voltages.
- Zero Drift Architecture: Features a novel zero drift architecture that maintains high accuracy without compromising bandwidth.
- External Reference Capability: Allows the output to be referenced externally, providing flexibility in application setups.
- AEC-Q100 Qualified: Suitable for automotive applications due to its compliance with AEC-Q100 standards.
- Low Offset Drift: Less than 0.4 µV/°C, ensuring minimal measurement error over temperature changes.
Applications
- High-Side Current Sensing: Ideal for monitoring current in high-side configurations, such as in motor controls and solenoid controls.
- Motor Control: Suitable for 3-phase motor control and H-bridge motor control, providing instantaneous current monitoring and diagnostic information.
- Power Management: Used in power management systems where accurate current sensing is critical.
- Diagnostic Protection: Provides overcurrent detection and other diagnostic features essential for system protection.
Q & A
- What is the gain of the AD8417WBRZ-RL?
The gain of the AD8417WBRZ-RL is 60 V/V.
- What is the operating temperature range of the AD8417WBRZ-RL?
The operating temperature range is −40°C to +125°C for AD8417WB and AD8417B, and −40°C to +150°C for AD8417WH.
- What is the common-mode rejection ratio (CMRR) of the AD8417WBRZ-RL?
The CMRR is 86 dB from dc to 10 kHz.
- Is the AD8417WBRZ-RL suitable for automotive applications?
Yes, it is AEC-Q100 qualified, making it suitable for automotive applications.
- What is the input offset drift of the AD8417WBRZ-RL?
The input offset drift is less than 0.4 µV/°C.
- Can the AD8417WBRZ-RL measure current in both directions?
Yes, it supports bidirectional operation.
- What is the typical bandwidth of the AD8417WBRZ-RL?
The typical bandwidth is 250 kHz.
- How does the AD8417WBRZ-RL handle rapidly changing common-mode voltages?
It features a unique architecture that accurately amplifies small differential current shunt voltages despite rapidly changing common-mode voltages.
- Can the output of the AD8417WBRZ-RL be externally referenced?
Yes, the output can be externally referenced, providing flexibility in application setups.
- What are some common applications of the AD8417WBRZ-RL?
Common applications include high-side current sensing, motor control, power management, and diagnostic protection.
