MAX9939
PRODUCTIONSPI-Programmable Gain Amplifier (PGA) with Input VOS Trim and Output Op Amp
Programmable Gain Amplifier with SPI Interface Suitable for a Wide Range of Applications
- Part Models
- 5
- 1ku List Price
- Starting From $1.38
Part Details
- SPI-Programmable Gains: 0.2V/V to 157V/V
- Extremely Low Gain Tempco
- Integrated Amplifier for R/C Programmable Active Filter
- Input Offset-Voltage Compensation
- Input Protection to ±16V
- 13µA Software Shutdown Mode
- -40°C to +125°C Operating Temperature Range
- 10-Pin µMAX Package
The MAX9939 is a general-purpose, differential-input programmable-gain amplifier (PGA) that is ideal for conditioning a variety of wide dynamic range signals such as those found in motor current-sense, medical instrumentation, and sonar data acquisition applications. It features SPI-programmable differential gains from 0.2V/V to 157V/V, input offset-voltage compensation, and an output amplifier that can be configured either as a high-order active filter or to provide a differential output.
The PGA is optimized for high-signal bandwidth and its gain can be programmed to be 0.2V/V, 1V/V, 10V/V, 20V/V, 30V/V, 40V/V, 60V/V, 80V/V, 119V/V, and 157V/V. Precision resistor matching provides extremely low gain tempco and high CMRR. Although the MAX9939 operates from a single supply VCC between 2.9V to 5.5V, it can process signals both above and below ground due to the use of an input level-shifting amplifier stage. Furthermore, its inputs are protected to ±16V, allowing it to withstand fault conditions and signal overranges.
The output amplifier is designed for high bandwidth and low-bias currents, making it ideal for use in multiple-feedback active filter topologies that offer much higher Qs and stopband attenuation than Sallen-Key architectures.
The MAX9939 draws 3.4mA of quiescent supply current at 5V, and includes a software-programmable shutdown mode that reduces its supply current to only 13µA. The MAX9939 is available in a 10-pin µMAX® package and operates over the -40°C to +125°C automotive temperature range.
Applications
- Amplification
- Differential to Single-Ended Conversion
- Differential-Input, Differential-Output Signal
- Medical Signal Conditioning
- Sensor Interface and Signal Processing
- Sensorless Motor Control
- Sonar and General Purpose Data Acquisition
Documentation
Data Sheet 1
Reliability Data 1
Technical Articles 3
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX9939AUB+ | 10-MINI_SO-N/A | ||
| MAX9939AUB+T | 10-MINI_SO-N/A | ||
| MAX9939AUB/GG8 | Micro-MAX, Thin Shrink Small-Outline | ||
| MAX9939AUB/V+ | 10-MINI_SO-N/A | ||
| MAX9939AUB/V+T | 10-MINI_SO-N/A |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
Software Development 1
Evaluation Kits
Evaluation Kit for the MAX9939
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