ADS1242 and ADS1243 are precision, wide dynamic range, delta-sigma, analog-to-digital (A/D) converters with 24-bit resolution operating from 2.7V to 5.25V supplies. These delta-sigma, A/D converters provide up to 24 bits of no missing code performance and effective resolution of 21 bits. The input channels are multiplexed. Internal buffering can be selected to provide a very high input impedance for direct connection to transducers or low-level voltage signals. Burn- out current sources are provided that allow for the detection of an open or shorted sensor. An 8-bit digital-to-analog converter (DAC) provides an offset correction with a range of 50% of the FSR (Full-Scale Range). The Programmable Gain Amplifier (PGA) provides selectable gains of 1 to 128 with an effective bandwidth of 500kHz. The converter has a single-cycle settling time and can be programmed from a single SPI™ interface.
The ADS1242 and ADS1243 are precision, wide dynamic range, delta-sigma analog-to-digital (A/D) converters with 24-bit resolution operating from 2.7V to 5.25V supplies. These converters provide up to 24 bits of no missing code performance and an effective resolution of 21 bits. The input channels are multiplexed, and internal buffering can be selected to provide a very high input impedance for direct connection to transducers or low-level voltage signals.
| Resolution | 24 Bits |
|---|---|
| Integral Nonlinearity | +0.0015 % of FS |
| Supply Voltage | 2.7V to 5.25V |
| Operating Temperature | 40°C to +85°C |
| PGA Gains | 1 to 128 |
| Effective Resolution (PGA=1) | 21 Bits |
The effective resolution is 21 bits when the PGA is set to 1, and 19 bits when the PGA is set to 128.
The devices operate from a power supply voltage range of 2.7V to 5.25V.
Yes, the converters provide simultaneous 50Hz and 60Hz rejection with a minimum of -90dB.