The 4-channel SAR ADC digitizes single-ended analog inputs at up to 1 MSPS with 12-bit resolution and no pipeline delay. It operates from a 2.7 V to 5.25 V supply and supports a separate functional digital interface supply down to 1.8 V, with SPI-compatible serial data access. An on-chip 2.5 V reference, programmable channel sequencer, MUX OUT/ADC IN path, alert interrupt, BUSY indication, and general-purpose output pins support monitor and control applications. Normal operating power is 1.4 mW typical at 3 V and 1 MSPS, while power-down current is 435 nA typical at 3 V. The device is specified for -40°C to +125°C operation and is offered in 20-lead TSSOP and 20-lead LFCSP packages.
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| ADC resolution | 12bits |
| Analog input channels | 4 single-ended |
| Maximum throughput rate | 1MSPS |
| Supply voltage VDD | 2.7 to 5.25V |
| Functional VDRIVE range | 1.8 to 5.25V |
| Reference output voltage | 2.5 typicalV |
| Reference drift | 5 typicalppm/°C |
| Signal-to-noise ratio | 70 typical at 10 kHz inputdB |
| Total harmonic distortion | -80 typical at 10 kHz inputdB |
| Integral nonlinearity | ±0.7 typical, ±1.0 max at VDD ≥ 3.0 VLSB |
| Differential nonlinearity | ±0.3 typical, ±0.9 maxLSB |
| Conversion time | 600ns |
| Operating temperature range | -40 to +125°C |
| Serial interface | SPI/QSPI/MICROWIRE/DSP compatible |
| Normal operating power | 1.4 typical at 3 V and 1 MSPSmW |
| Power-down current | 435 typical at VDD = 3 VnA |
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These are design resources that include the Analog Devices AD7091R-4
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.
