The ADS1219 is a precision, 24-bit, analog-to-digital converter (ADC) that includes all features necessary to implement the most common system monitoring functions, such as supply voltage, current, and temperature monitoring. The device features two differential or four single-ended inputs through a flexible input multiplexer (MUX), rail-to-rail input buffers, a programmable gain stage, a voltage reference, and an oscillator.
The device includes buffers that allow high-impedance sources to be directly connected to the device. A gain stage follows the buffers which provides selectable gains of 1 and 4. The ADS1219 can perform conversions at data rates as high as 1000 samples per second (SPS) with single-cycle settling. At 20 SPS, the digital filter offers simultaneous 50-Hz and 60-Hz rejection for noisy industrial applications.
The ADS1219 features a 2-wire, I2C-compatible interface that supports I2C bus speeds up to 1 Mbps. 16 different I2C addresses can be selected for the device via two address pins.
The ADS1219 is offered in a leadless 16-pin WQFN or a 16-pin TSSOP package and is specified over a temperature range of –40°C to +125°C.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
ADS1219 | WQFN (16) | 3.00 mm × 3.00 mm |
TSSOP (16) | 5.00 mm × 4.40 mm |
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. |