MAX9919
-20V to +75V Input Range, Precision Uni-/Bidirectional, Current-Sense Amplifiers
Current-Sense Amplifiers with Input Common Range that Extends Well Below Ground (-20V)
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Overview
Features and Benefits
- Reduce Protective Clamping for High Inductive Kickback Voltage
- -20V to +75V Input Common-Mode Voltage Range
- Supports Wide Range of Precision AC and DC Current Sensing Applications
- Uni- or Bidirectional Current Sensing
- 0.6% (max) Gain Accuracy Error
- 400µV (max) Input Offset Voltage
- 120kHz, -3dB Bandwidth (MAX9919N)
- Reference Input for Bidirectional OUT
- Rail-to-Rail Output
- Saves Board Space
- 8-Pin SOIC Package
- Single-Supply Operation (4.5V to 5.5V)
- AEC-Q100 Qualified (MAX9918ASA/V+, MAX9919FASA/V+, MAX9919NASA/V+, MAX9920ASA/V+ Only)
Product Details
The MAX9918/MAX9919/MAX9920 are single-supply, high-accuracy current-sense amplifiers with a high input common-mode range that extends from -20V to +75V. These amplifiers are well suited for current monitoring of inductive loads such as motors and solenoids, where common-mode voltages can become negative due to inductive kickback, reverse-battery conditions, or transient events.
The MAX9918/MAX9920 feature adjustable gain set by an external resistive-divider network. The MAX9919 features fixed gains of 45V/V (MAX9919F) and 90V/V (MAX9919N). The MAX9918/MAX9919/MAX9920 operate as unidirectional amplifiers when VREFIN = GND and as bidirectional amplifiers when VREFIN = VCC/2. The MAX9920 attenuates the input signal by a factor of 4 at the input level-shifting stage allowing the device to sense voltages up to 200mV (unidirectional operation) or ±100mV (bidirectional operation).
The MAX9918/MAX9919/MAX9920 operate with a single 5V supply voltage, are fully specified over the -40°C to +125°C automotive temperature range, and are available in an 8-pin SOIC package.
Applications
- Automotive
- Current Monitoring of Inductive Loads
- H-Bridge Motor Current Sensing
- High- and Low-Side Precision Current Sensing
- Precision High-Voltage Current Monitoring
- Solenoid Current Sensing
- Super-Capacitor Charge/Discharge Monitoring
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
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MAX9919 Reliability Data1/12/2023PDF93K
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| MAX9919FASA+ | Material Declaration | Reliability Data | 8-SOIC_N-150_MIL | |
| MAX9919FASA+T | Material Declaration | Reliability Data | 8-SOIC_N-150_MIL | |
| MAX9919FASA/V+ | Material Declaration | Reliability Data | 8-SOIC_N-150_MIL | |
| MAX9919FASA/V+T | Material Declaration | Reliability Data | 8-SOIC_N-150_MIL | |
| MAX9919NASA+ | Material Declaration | Reliability Data | 8-SOIC_N-150_MIL | |
| MAX9919NASA+T | Material Declaration | Reliability Data | 8-SOIC_N-150_MIL | |
| MAX9919NASA/V+ | Material Declaration | Reliability Data | 8-SOIC_N-150_MIL | |
| MAX9919NASA/V+T | Material Declaration | Reliability Data | 8-SOIC_N-150_MIL | |
| Wafer Fabrication Data | MAX9919 Reliability Data |
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