Overview
The ADC121S021 device, manufactured by Texas Instruments, is a low-power, single-channel CMOS 12-bit analog-to-digital converter (ADC) with a high-speed serial interface. This converter is distinguished by its specification over a range of sample rates from 50 ksps to 200 ksps, unlike conventional ADCs that are specified at a single sample rate. It employs a successive-approximation register architecture with an internal track-and-hold circuit. The ADC121S021 operates with a single supply voltage ranging from 2.7 V to 5.25 V and is compatible with several serial interface standards, including SPI, QSPI, MICROWIRE, and common DSP serial interfaces.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12 bits |
| Sampling Rate | 50 ksps to 200 ksps |
| Number of Inputs | 1 (Single Ended) |
| Data Interface | SPI, QSPI, MICROWIRE, DSP |
| Supply Voltage Range | 2.7 V to 5.25 V |
| Power Consumption (Typical) | 1.5 mW @ 3.6 V, 7.9 mW @ 5.25 V |
| Power-Down Consumption | 2.6 µW @ 5.25 V |
| Operating Temperature Range | -40°C to 85°C |
| Package Type | 6-pin SOT-23, 6-pin WSON |
| DNL (Typical) | 0.45 and 0.25 LSB |
| INL (Typical) | 0.45 and 0.4 LSB |
| SNR (Typical) | 72.3 dB |
Key Features
- Specified over a range of sample rates (50 ksps to 200 ksps)
- Variable power management
- Single power supply with a range of 2.7 V to 5.25 V
- Compatible with SPI, QSPI, MICROWIRE, and many common DSP serial interfaces
- Low power consumption with a power-down feature reducing power to as low as 2.6 µW
- Internal track-and-hold circuit
- Successive-approximation register architecture
- Output serial data in straight binary format
Applications
The ADC121S021 is suitable for a variety of applications requiring low-power, high-speed analog-to-digital conversion. These include:
- Industrial control systems
- Medical devices
- Automotive systems
- Consumer electronics
- Embedded systems requiring precise and efficient analog-to-digital conversion
Q & A
- What is the resolution of the ADC121S021?
The ADC121S021 has a resolution of 12 bits.
- What is the sampling rate range of the ADC121S021?
The sampling rate range is from 50 ksps to 200 ksps.
- What types of serial interfaces is the ADC121S021 compatible with?
The ADC121S021 is compatible with SPI, QSPI, MICROWIRE, and many common DSP serial interfaces.
- What is the supply voltage range for the ADC121S021?
The supply voltage range is from 2.7 V to 5.25 V.
- How much power does the ADC121S021 consume in normal operation?
The power consumption is typically 1.5 mW at 3.6 V and 7.9 mW at 5.25 V.
- What is the power consumption in power-down mode?
The power consumption in power-down mode is as low as 2.6 µW using a 5.25-V supply.
- What is the operating temperature range of the ADC121S021?
The operating temperature range is from -40°C to 85°C.
- What package types are available for the ADC121S021?
The ADC121S021 is available in 6-pin SOT-23 and 6-pin WSON packages.
- What is the typical SNR of the ADC121S021?
The typical SNR is 72.3 dB.
- Is the ADC121S021 RoHS compliant?
