ADS1219 是一款 24 位精密模数转换器 (ADC),集成了 实施 常见系统监控功能(如电源电压、电流和温度监控)所需的所有特性。该器件 通过 灵活的输入多路复用器 (MUX)、轨至轨输入缓冲器、可编程增益级、电压基准和振荡器实现两个差分输入或四个单端输入。
该器件配备缓冲器,可直接连接高阻抗源。缓冲器可以提供增益级,可选增益有 1 和 4。ADS1219 可在数据速率高达每秒 1000 个样本 (SPS) 的情况下通过单周期稳定执行转换。针对噪声环境中的工业应用,当采样频率为 20SPS 时,数字滤波器可同时提供 50Hz 和 60Hz 抑制的需求。
ADS1219 具有 一个与 I2C 兼容的 2 线接口,支持高达 1Mbps 的 I2C 总线速度。可通过两个地址引脚为器件选择 16 个不同的 I2C 地址。
ADS1219 采用无引线的 16 引脚 WQFN 或 16 引脚 TSSOP 封装,额定工作温度范围为 –40°C 至 +125°C。
器件型号 | 封装 | 封装尺寸(标称值) |
---|---|---|
ADS1219 | WQFN (16) | 3.00mm × 3.00mm |
TSSOP (16) | 5.00mm × 4.40mm |
Changes from * Revision (July 2018) to A Revision
PIN | ANALOG OR DIGITAL
INPUT/OUTPUT |
DESCRIPTION(1) | ||
---|---|---|---|---|
NAME | NO. | |||
RTE | PW | |||
A0 | 15 | 1 | Digital input | I2C slave address select pin 0. See the I2C Address section for details. |
A1 | 16 | 2 | Digital input | I2C slave address select pin 1. See the I2C Address section for details. |
AIN0 | 9 | 11 | Analog input | Analog input 0 |
AIN1 | 8 | 10 | Analog input | Analog input 1 |
AIN2 | 5 | 7 | Analog input | Analog input 2 |
AIN3 | 4 | 6 | Analog input | Analog input 3 |
AGND | 3 | 5 | Analog supply | Negative analog power supply |
AVDD | 10 | 12 | Analog supply | Positive analog power supply. Connect a 100-nF (or larger) capacitor to AGND. |
DGND | 2 | 4 | Digital supply | Digital ground |
DRDY | 12 | 14 | Digital output | Data ready, active low. Connect to DVDD using a pullup resistor. |
DVDD | 11 | 13 | Digital supply | Positive digital power supply. Connect a 100-nF (or larger) capacitor to DGND. |
REFN | 6 | 8 | Analog input | Negative reference input |
REFP | 7 | 9 | Analog input | Positive reference input |
RESET | 1 | 3 | Digital input | Reset, active low |
SCL | 14 | 16 | Digital input | Serial clock input. Connect to DVDD using a pullup resistor. |
SDA | 13 | 15 | Digital input/output | Serial data input and output. Connect to DVDD using a pullup resistor. |
Thermal pad | Pad | — | — | Thermal power pad. Connect to AGND. |