The ADC081S021 is a low-power, single channel CMOS 8-bit analog-to-digital converter with a high-speed serial interface. Unlike the conventional practice of specifying performance at a single sample rate only, the ADC081S021 is fully specified over a sample rate range of 50 ksps to 200 ksps. The converter is based upon 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 ADC081S021 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 1.3 mW and 7.7 mW, respectively. The power-down feature reduces the power consumption to as low as 2.6 µW using a +5.25V supply. The ADC081S021 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 ADC081S021 is a low‑power, single‑channel CMOS 8‑bit analog‑to‑digital converter that operates over a sample‑rate range of 50 ksps to 200 ksps. It uses a successive‑approximation register architecture with an internal track‑and‑hold circuit and supports SPI™, QSPI™, MICROWIRE, and other DSP serial interfaces. The device is supplied in 6‑lead LLP and SOT‑23 packages and is rated for industrial temperature ranges (‑40 °C to +85 °C).
Key features include a single supply voltage of 2.7 V to 5.25 V, typical power consumption of 1.3 mW at 3.6 V, and specifications such as DNL ±0.04 LSB, INL ±0.04 LSB, SNR ≈ 49.6 dB, and ENOB ≈ 7.9 bits. Detailed pin descriptions, absolute maximum ratings, timing diagrams, and mechanical dimensions are provided for designers.
| Sample Rate Range | 50 ksps to 200 ksps |
|---|---|
| Supply Voltage | 2.7 V to 5.25 V |
| DNL (Differential Non‑Linearity) | +0.04 / -0.03 LSB (typ) |
| INL (Integral Non‑Linearity) | +0.04 / -0.03 LSB (typ) |
| Signal‑to‑Noise Ratio (SNR) | 49.6 dB (typ) |
| Operating Temperature Range | -40 °C to +85 °C |
| Package Types | 6‑lead LLP, SOT‑23 |
It operates from a single supply voltage of 2.7 V to 5.25 V.
The device is available in 6‑lead LLP and SOT‑23 packages.
The converter can sample up to 200 ksps.