Features: ` 240SPS Data Rate with 4MHz Clock` 20-Bit Effective Resolution` Input Multiplexer with Four Differential Channels` Pin-Selectable, High-Impedance Input Buffer` ±5V Differential Input Range` 0.0003% INL (typ), 0.0015% INL (max)` Self-Calibrating` Simple 2-Wire Serial Interface` On-Chip T...
ADS1224: Features: ` 240SPS Data Rate with 4MHz Clock` 20-Bit Effective Resolution` Input Multiplexer with Four Differential Channels` Pin-Selectable, High-Impedance Input Buffer` ±5V Differential Input Rang...
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ADS1205 | UNIT | |
GND to VDD | −0.3 to 6 | V |
DVDD to VDD | −0.3 to 3.6 | V |
Input Current | 100, momentary | mA |
Input Current | 10, continuous | mA |
Analog Input Voltage with Respect to GND | −0.5 to AVDD + 0.5 | V |
Reference Input Voltage with Respect to GND | −0.3 to DVDD + 0.3 | V |
Digital Input Voltage with Respect to GND | −0.3 to DVDD + 0.3 | V |
Maximum Junction Temperature | +150 | °C |
Operating Temperature Range | -40 to +85 | °C |
Storage Temperature Range | -65 to +150 | °C |
Lead Temperature (soldering, 10s) | +300 | °C |
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
The ADS1224 is a 4-channel, 24-bit, delta-sigma analog- to-digital (A/D) converter. It offers excellent performance and low power in a TSSOP-20 package. It is well-suited for demanding, high-resolution measurements, especially in portable systems and other space-saving and power-constrained applications.
A delta-sigma modulator and digital filter form the basis of the ADS1224 A/D converter. The analog modulator has a ±5V differential input range. An input multiplexer (mux) is used to select between four separate differential input channels. A buffer can be selected to increase the input impedance of the measurement.
A simple, 2-wire serial interface provides all the necessary control. Data retrieval, self-calibration, and Standby mode are handled with a few simple waveforms. When only single conversions are needed, the product can be quickly shut down (Standby mode) while idle between measurements to dramatically reduce the overall power consumption. Multiple ADS1224s can be connected together to create a synchronously sampling multichannel measurement system. The ADS1224 is designed to easily connect to microcontrollers, such as the MSP430.
The ADS1224 supports 2.7V to 5.5V analog supplies and 2.7V to 5.5V digital supplies. Power is typically less than 1mW in 3V operation and less than 1W during Standby mode.