| Resolution (Bits) | 12 |
| Number of input channels | 1 |
| Sample rate (Max) (kSPS) | 200 |
| Interface type | SPI, Microwire (Serial I/O) |
| Architecture | SAR |
| Input type | Single-Ended |
| Rating | Catalog |
| Reference mode | Supply |
| Input range (Max) (V) | 5.25 |
| Input range (Min) (V) | 0 |
| Features | Small Size |
| Operating temperature range (C) | -40 to 85 |
| Power consumption (Typ) (mW) | 1.5 |
| Analog voltage AVDD (Min) (V) | 2.7 |
| SNR (dB) | 72.3 |
| Analog voltage AVDD (Max) (V) | 5.25 |
| INL (Max) (+/-LSB) | 1 |
| Digital supply (Min) (V) | 2.7 |
| Digital supply (Max) (V) | 5.25 |
- Specified Over a Range of Sample Rates
- Variable Power Management
- Single Power Supply With 2.7-V to 5.25-V Range
- Compatible With the SPI, QSPI, MICROWIRE, and DSP
- Key Specifications:
- DNL: 0.45 and –0.25 LSB (Typical)
- INL: 0.45 and –0.4 LSB (Typical)
- SNR: 72.3 dB (Typical)
- Power Consumption
- 3.6-V Supply: 1.5 mW (Typical)
- 5.25-V Supply: 7.9 mW (Typical)
The ADC121S021 device is a low-power, single-channel CMOS 12-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 ADC121S021 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 ADC121S021 operates with a single supply that can range from 2.7 V to 5.25 V. Normal power consumption using a 3.6-V or 5.25-V supply is 1.5 mW and 7.9 mW, respectively. The power-down feature reduces the power consumption to as low as 2.6 μW using a 5.25-V supply.
The ADC121S021 is packaged in 6-pin WSON and SOT-23 packages. Operation over the industrial temperature range of ?40°C to 85°C is ensured.