The ADC121S051 is a low-power, single channel CMOS 12-bit analog-to-digital converter with a high-speed serial interface. It has a sample rate range of 200 ksps to 500 ksps. The converter is based on a successive-approximation register architecture with an internal track-and-hold circuit. The output serial data is straight binary and is compatible with several standards, such as SPI™, QSPI™, MICROWIRE, and many common DSP serial interfaces. The ADC121S051 operates with a single supply that can range from +2.7V to +5.25V. Normal power consumption using a +3.6V or +5.25V supply is 1.7 mW and 8.7 mW, respectively. The power-down feature reduces the power consumption to as low as 2.6 µW using a +5.25V supply. The ADC121S051 is packaged in 6-lead LLP and SOT-23 packages. Operation over the industrial temperature range of −40˚C to +85˚C is guaranteed.
The ADC121S051 is a low‑power, single‑channel CMOS 12‑bit analog‑to‑digital converter that operates over a sample‑rate range of 200 ksps to 500 ksps. It uses a successive‑approximation register architecture with an internal track‑and‑hold circuit and supports SPI™, QSPI™, MICROWIRE, and common DSP serial interfaces.
The device is supplied in 6‑lead LLP and SOT‑23 packages, works from a single 2.7 V to 5.25 V supply, and offers typical power consumption of 1.7 mW at 3.6 V. Key performance figures include a 12‑bit resolution, ENOB of 11.7 bits, and an SNR of about 72 dB.
| Resolution | 12 bits |
|---|---|
| Supply Voltage | 2.7 V to 5.25 V |
| Typical Power Consumption (3.6 V) | 1.7 mW |
| Package Types | 6‑lead LLP, SOT‑23 |
| ENOB | 11.7 bits |
The ADC121S051 operates from a single supply voltage between 2.7 V and 5.25 V.
Typical power consumption is 1.7 mW when powered at 3.6 V.
It provides a 12‑bit resolution with no missing codes.
The device can sample up to 500 ksps.