The ADS7861 is a dual, 12-bit, 500kHz, Analog-to-Digital (A/D) converter with four fully differential input channels grouped into two pairs for high speed, simultaneous signal acquisition. Inputs to the sample-and-hold amplifiers are fully differential and are maintained differential to the input of the A/D converter. This provides excellent common-mode rejection of 80dB at 50kHz which is important in high noise environments.
The ADS7861 offers a high-speed, dual serial interface and control inputs to minimize software overhead. The output data for each channel is available as a 12-bit word. The ADS7861 is offered in both an SSOP-24 and a QFN-32 package and is fully specified over the -40°C to +125°C operating range.
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| Resolution (Bits) | 12 |
| Sample rate (max) (ksps) | 500 |
| Number of input channels | 4 |
| Interface type | SPI |
| Architecture | SAR |
| Input type | Differential |
| Multichannel configuration | Simultaneous Sampling |
| Rating | Catalog |
| Reference mode | External, Internal |
| Input voltage range (max) (V) | 5.25 |
| Input voltage range (min) (V) | 0 |
| Operating temperature range (°C) | -40 to 125 |
| Power consumption (typ) (mW) | 25 |
| Analog supply (min) (V) | 4.75 |
| Analog supply voltage (max) (V) | 5.25 |
| Digital supply (min) (V) | 4.75 |
| Digital supply (max) (V) | 5.25 |
| SSOP (DBQ) | 24 | 51.9 mm² 8.65 x 6 |
| VQFN (RHB) | 32 | 25 mm² 5 x 5 |
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