AD7490 is a 12-bit high speed, low power, 16-channel, successive approximation ADC, which can operate at a maximum clock speed of 1MSPS with a VDD voltage of 2.7V to 5.25V.
The AD7490 is a high‑speed, low‑power 12‑bit ADC offering up to 1 MSPS throughput. It operates from a single 2.7 V to 5.25 V supply and provides 16 single‑ended analog inputs with a programmable sequencer. The device features a fast serial interface (SPI/QSPI/MICROWIRE) and supports both straight‑binary and two's‑complement output coding.
The datasheet includes functional block diagrams, pin configurations for 28‑lead TSSOP and 32‑lead LFCSP packages, timing specifications, absolute maximum ratings, and typical performance characteristics such as SNR, THD, and power‑supply rejection. Ordering information and evaluation board options are also provided.
| Resolution | 12 Bits |
|---|---|
| Maximum Throughput Rate | 1 MSPS |
| Supply Voltage Range | 2.7 V to 5.25 V |
| Power Dissipation (5 V, 1 MSPS) | 12.5 mW max |
| Power Dissipation (3 V, 870 kSPS) | 5.4 mW max |
| Analog Input Channels | 16 single‑ended |
| Signal‑to‑Noise Ratio (50 kHz input) | 69.5 dB |
| Package Types | 28‑lead TSSOP, 32‑lead LFCSP |
| Full‑Shutdown Current | 0.5 pA max |
The AD7490 can sample at up to 1 MSPS.
At 1 MSPS with a 5 V supply the device dissipates a maximum of 12.5 mW.
It provides 16 single‑ended analog input channels with a sequencer.
The full‑shutdown current is limited to 0.5 pA maximum.