Single ADC SAR 105KSPS 12Bit Serial 12Pin WLCSP T/R
Product Details
The AD7879/AD7889 are 12-bit successive approximation analog-to-digital converters SAR ADCs with a synchronous serial interface and low on-resistance switches for driving 4-wire resistive touch screens. The AD7879/AD7889 work with a very low power supply—a single 1.6 V to 3.6 V supply—and feature a throughput rate of 105 kSPS. The devices include a shutdown mode that reduces current consumption to less than 6 μA.
To reduce the effects of noise from LCDs and other sources, the AD7879/AD7889 contain a preprocessing block. The preprocessing function consists of a median filter and an averaging filter. The combination of these two filters provides a more robust solution, discarding the spurious noise in the signal and keeping only the data of interest. The size of both filters is programmable. Other user-programmable conversion controls include variable acquisition time and first conversion delay; up to 16 averages can be taken per conversion. The AD7879/AD7889 can run in slave mode or standalone master mode, using an automatic conversion sequencer and timer.
The AD7879/AD7889 have a programmable pin that can operate as an auxiliary input to the ADCs, as a battery monitor, or as a general-purpose input/output GPIO. In addition, a programmable interrupt output can operate in three modes: as a general-purpose interrupt to signal when new data is available DAV, as an interrupt to indicate when limits are exceeded INT, or as a pen-down interrupt when the screen is touched PENIRQ. The AD7879/AD7889 offer temperature measurement and touch pressure measurement.
The AD7879 is available in a 12-ball, 1.6 mm × 2 mm WLCSP and in a 16-lead, 4 mm × 4 mm LFCSP. The AD7889 is available in a backside coated version of the WLCSP. Both devices support an SPI interface AD7879/AD7889 or an I2C interface AD7879-1/ AD7889-1.
**Applications**
### Features and Benefits
供电电流 10 nA
电路数 1
通道数 6
耗散功率 2.30 mW
分辨率Bits 12.0
输入电容 30.0 pF
工作温度Max 85 ℃
工作温度Min -40 ℃
耗散功率Max 2.3 mW
电源电压 1.6V ~ 3.6V
输入电压 2.6 V
安装方式 Surface Mount
引脚数 12
封装 WLCSP-12
长度 2.01 mm
宽度 1.51 mm
高度 0.36 mm
封装 WLCSP-12
工作温度 -40℃ ~ 85℃
产品生命周期 Obsolete
包装方式 Tape & Reel TR
制造应用 Building Control and Automation, White Goods and Vending, Building Technology
RoHS标准 RoHS Compliant
含铅标准 Lead Free
军工级 No
型号/品牌 | 代替类型 | 替代型号对比 |
---|---|---|
AD7889-1ACBZ-RL7 ADI 亚德诺 | 当前型号 | 当前型号 |
AD7889ACBZ-RL 亚德诺 | 完全替代 | AD7889-1ACBZ-RL7和AD7889ACBZ-RL的区别 |