ADS1212P Delta-sigma 22-Bit Analog-to-Digital Converter
Datasheet
Features
- Delta-sigma A/D Converter
- 22 bits no missing codes
- 20 bits effective resolution at 10 Hz and 16 bits at 1000 Hz
- Low power: 1.4mw
- Differential inputs
- Programmable gain amplifier
- SPI™ compatible SSI interface
- Programmable cutoff frequency up to 6.25 KHz
- Internal / External reference
- On-chip self-calibration
Applications
- Industrial process control
- Instrumentation
- Blood analysis
- Smart transmitters
- Portable instruments
- Weigh scales
- Pressure transducers
|
| Resolution(Bits) |
22 |
| Sample Rate (max) |
6.25kSPS |
| Architecture |
Delta-Sigma |
| Power Consumption(Typ)(mW) |
1.4 |
| DNL(Max)(+/-LSB) |
1 |
| INL(Max)(+/-LSB) |
0.0015% |
| No Missing Codes(Bits) |
22 |
| ENOB(Bits) |
20 |
| No. of Supplies |
1 |
| Analog Voltage AV/DD(Min)(V) |
4.75 |
| Analog Voltage AV/DD(Max)(V) |
5.25 |
| Logic Voltage DV/DD(Min)(V) |
4.75 |
| Logic Voltage DV/DD(Max)(V) |
5.25 |
| Input Configuration Range |
2Vref/PGA (1-16) |
| Reference Mode |
Int |
| Rating |
Catalog |
| Pin / Package |
18 PDIP |
| # Input Channels |
1 |
|
Description
The ADS1212 are precision, wide dynamic range, delta-sigma Analog-to-Digital (A/D) converters with 24-bit resolution operating from a single +5V supply. The differential inputs are ideal for direct connection to transducers or low-level voltage signals. The delta-sigma architecture is used for wide dynamic range and to guarantee 22 bits of no missing code performance. An effective resolution of 20 bits is achieved through the use of a very low-noise input amplifier at conversion rates up to 10Hz. Effective resolutions of 16 bits can be maintained up to a sample rate of 1kHz through the use of the unique Turbo Modulator mode of operation. The dynamic range of the converters is further increased by providing a low-noise programmable gain amplifier with a gain range of 1 to 16 in binary steps.
The ADS1212 are designed for high-resolution measurement applications in smart transmitters, industrial process control, weigh scales, chromatography and portable instrumentation. Both converters include a flexible synchronous serial interface which is SPI compatible and also offers a two-wire control mode for low-cost isolation.
The ADS1212 is a single channel converter and is offered in both DIP-18 and SO-18 packages. .