Overview
The ADC122S101 is a low-power, two-channel CMOS 12-bit analog-to-digital converter (ADC) produced by Texas Instruments. It features a high-speed serial interface and is designed for applications requiring high accuracy and low power consumption. The converter operates over a sample rate range of 500 ksps to 1 Msps and is based on a successive-approximation register architecture with an internal track-and-hold circuit. It can be configured to accept one or two input signals at inputs IN1 and IN2, making it versatile for various measurement tasks.
Key Specifications
| Parameter | Conditions | Typical Limits | Units |
|---|---|---|---|
| Resolution | - | 12 bits | - |
| DNL (Differential Non-Linearity) | - | +0.9 / −0.6 LSB | - |
| INL (Integral Non-Linearity) | - | ±0.64 LSB | - |
| SNR (Signal-to-Noise Ratio) | - | 72.4 dB | - |
| Sample Rate | - | 500 ksps to 1 Msps | - |
| Power Consumption (3V Supply) | - | 4.3 mW | - |
| Power Consumption (5V Supply) | - | 13.1 mW | - |
| Power-Down Consumption (3V Supply) | - | 0.14 µW | - |
| Power-Down Consumption (5V Supply) | - | 0.32 µW | - |
| Supply Voltage Range | - | +2.7V to +5.25V | - |
| Package | - | 8-lead VSSOP | - |
Key Features
- Low power consumption with variable power management.
- High-speed serial interface compatible with SPI, QSPI, MICROWIRE, and other common DSP serial interfaces.
- Two input channels (IN1 and IN2) with a successive-approximation register architecture and internal track-and-hold circuit.
- Single power supply operation from +2.7V to +5.25V.
- Power-down feature reducing power consumption to 0.14 µW (3V) or 0.32 µW (5V).
- No power-up delays or dummy conversions required.
- Output data in straight binary format.
Applications
- Portable systems.
- Remote data acquisition.
- Instrumentation and control systems.
Q & A
- What is the resolution of the ADC122S101?
The ADC122S101 has a resolution of 12 bits. - What is the sample rate range of the ADC122S101?
The sample rate range is from 500 ksps to 1 Msps. - What is the typical power consumption of the ADC122S101 using a 3V supply?
The typical power consumption is 4.3 mW. - What is the typical power consumption of the ADC122S101 using a 5V supply?
The typical power consumption is 13.1 mW. - How does the power-down feature of the ADC122S101 work?
The power-down feature reduces the power consumption to 0.14 µW using a 3V supply or 0.32 µW using a 5V supply when CS is high. - What type of package is the ADC122S101 available in?
The ADC122S101 is available in an 8-lead VSSOP package. - Is there a need for power-up delays or dummy conversions with the ADC122S101?
No, there are no power-up delays or dummy conversions required. - What is the format of the output data from the ADC122S101?
The output data is in straight binary format. - What serial interfaces is the ADC122S101 compatible with?
The ADC122S101 is compatible with SPI, QSPI, MICROWIRE, and many common DSP serial interfaces. - How are the input channels selected on the ADC122S101?
The input channels are selected using the Control Register bits (ADD2, ADD1, ADD0).
