Product introduction

Cs1259b is a 24 bit high precision ADC, which integrates high precision ADC signal chain, low drift LDO, low drift reference voltage, high precision oscillator and 3-wire communication interface.
The ADC signal chain includes: input muxp / muxn, level shift module (lvshift), low noise programmable gain amplifier (PGA), 24 bit sigma delta ADC
Digital filter, supporting bridge sensor, infrared thermopile and other sensors, is very suitable for the current popular forehead temperature gun applications.
Chip features
Support single ended or differential input
Up to 5 external input channels can form multiple differential input pairs
Support input level shift function
PGA
- 1 / 2 / 4 / 8 / 16 / 32 / 64 / 128 times optional gain
- equivalent input impedance up to 100 Mohm
ADC
- 24 bit resolution
- output speed 10 ~ 1280hz, 8-gear optional
Significant bits: 19.5bits at 2.35v reference, 40Hz rate and 128 times gain
LDO and internal reference voltage
- built in low drift LDO, output 2.35/2.45/2.8/3.0v optional, 30ppm / ℃, accuracy ± 1%
- built in 1.225v low drift reference voltage, 30ppm / ℃, accuracy ± 1%
Support performance, normal, low power consumption, sleep mode
Support voltage measurement, temperature measurement, manual measurement mode, single command switching
Low drift on chip clock
Three wire serial communication
Application
Infrared thermopile sensor
Bridge sensor