Low Drift, Low Power GX34XX Replaces REF34XX/MAX607x in Servo Driver Control Module

The voltage reference source in the servo driver control module mainly provides a stable reference voltage to provide a stable DC reference voltage for a variety of chips and amplifiers in the control circuit, so that the servo driver‘s processing of the feedback signals, such as position, speed, and current, is more accurate, and thus realizes the servo motor with high precision control.

The servo driver control module can use the GXSC low-power, high-precision CMOS GX30XX, the device‘s low temperature drift of 3 ppm/°C, with an initial accuracy of ±0.08%, low operating current, and power consumption of less than 125 μA, but also provides a very low output noise of 15 μVp-p/V, making it possible to use a high-resolution data converter to maintain high signal integrity in noise-critical systems .

The GX34XX is compatible with most ADCs and DACs. The device‘s low output voltage hysteresis and low long-term output voltage drift further improve stability and system reliability. In addition, the small size and low operating current (125μA) of these devices favor portable and battery-powered applications.

The device features are described as follows: 

- Initial accuracy: ±0.08% (max) 

- Temperature coefficient: 3ppm/°C 

- Operating temperature range: -40°C to 125°C 

- Output current: ±10mA - Low quiescent current: 125μA 

- Ultra-low zero load dropout voltage: 200mV 

- Input voltage: 2.7~5.5V 

- Output 1/f noise (0.1Hz to 10Hz): 15μVp-p/V - Long-term stability: 45ppm/1000 hours 

- Supports small package SOT-23(6) 

- PIN TO PIN replacement for MAX607x, REF34xx, ADR34xx, and LT1790 

The GX34XX with its high accuracy, low drift and low noise, the GX34XX is able to maintain a stable reference voltage output under different operating environments and load conditions, which helps to enhance the stability of servo drive control modules.