| Resolution (Bits) | 12 |
| Number of input channels | 4 |
| Sample rate (Max) (kSPS) | 500 |
| Interface type | SPI |
| Architecture | SAR |
| Input type | Differential |
| Multi-channel configuration | Simultaneous Sampling |
| Rating | Catalog |
| Reference mode | Ext, Int |
| Input range (Max) (V) | 5.25 |
| Input range (Min) (V) | 0 |
| Operating temperature range (C) | -40 to 125 |
| Power consumption (Typ) (mW) | 25 |
| Analog voltage AVDD (Min) (V) | 4.75 |
| Analog voltage AVDD (Max) (V) | 5.25 |
| INL (Max) (+/-LSB) | 1 |
| Digital supply (Min) (V) | 4.75 |
| Digital supply (Max) (V) | 5.25 |
- 4 INPUT CHANNELS
- FULLY DIFFERENTIAL INPUTS
- 2μs TOTAL THROUGHPUT PER CHANNEL
- NO MISSING CODES
- 1MHz EFFECTIVE SAMPLING RATE
- LOW POWER: 40mW
- SSI SERIAL INTERFACE
- OPERATING TEMPERATURE RANGE: 40°C to +125°C
- APPLICATIONS
- MOTOR CONTROL
- MULTI-AXIS POSITIONING SYSTEMS
- 3-PHASE POWER CONTROL
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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.