A 2-channel successive approximation analog-to-digital converter provides 12-bit resolution and up to 1 MSPS throughput without pipeline delay. The converter operates from a 2.7 V to 5.25 V supply and uses a separate 1.8 V to 5.25 V logic interface supply. An integrated 2.5 V reference, channel sequencer, SPI-compatible serial interface, and MUXOUT/ADCIN signal-conditioning path support compact data-acquisition designs. The device is specified for operation from -40°C to +125°C and is offered in 16-lead LFCSP_WQ and 16-lead TSSOP package options.
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| ADC Architecture | Successive approximation register |
| Resolution | 12bit |
| Number of Input Channels | 2 |
| Throughput Rate | 1MSPS |
| Supply Voltage | 2.7 to 5.25V |
| Logic Interface Supply Voltage | 1.8 to 5.25 functional, 2.7 to 5.25 specified performanceV |
| Reference Voltage | 2.5 internalV |
| Analog Input Voltage Range | 0 to VREFV |
| Signal-to-Noise Ratio | 70 typical at 10 kHz inputdB |
| SINAD | 69 typical at 10 kHz inputdB |
| Total Harmonic Distortion | -80 typical at 10 kHz inputdB |
| Integral Nonlinearity | ±0.7 typical, ±1.0 maximum at VDD ≥ 3.0 VLSB |
| Differential Nonlinearity | ±0.3 typical, ±0.9 maximumLSB |
| Conversion Time | 600 maximumns |
| Normal Operating Power | 1.4 typical at 3 V and 1 MSPSmW |
| Power-Down Current | 435 typical at VDD = 3 VnA |
| Digital Interface | SPI/QSPI/MICROWIRE/DSP compatible |
| Operating Temperature Range | -40 to +125°C |
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Evaluation guide for EVAL-AD7091R-8ARDZ, supporting AD7091R-2/-4/-8 12-bit, 1 MSPS ADCs. Features on-board power management and ACE software compatibility for data analysis.
