Overview
The ADS8867IDGSR is a 16-bit, 100-kSPS (kilosamples per second), true-differential analog-to-digital converter (ADC) produced by Texas Instruments. This device is part of a high-speed, successive approximation register (SAR) ADC family and is known for its high performance and low power consumption. The ADS8867 operates with a 2.5-V to 5-V external reference voltage, offering a wide selection of signal ranges without the need for additional input signal scaling. The device features an SPI-compatible serial interface that supports daisy-chain operation, making it easy to interface with microprocessors, digital signal processors (DSPs), or field-programmable gate arrays (FPGAs).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16 | Bits |
| Sample Rate | 100 | kSPS |
| Input Type | True-Differential | |
| Input Range | -VREF to +VREF | |
| Reference Voltage | 2.5 V to 5 V | |
| Analog Supply Voltage (AVDD) | 2.7 V to 3.6 V | |
| Digital Supply Voltage (DVDD) | 1.65 V to 3.6 V | |
| Operating Temperature | -40°C to +85°C | |
| Power Consumption at 100 kSPS | 0.7 mW | |
| Power Consumption at 10 kSPS | 70 µW | |
| Conversion Time | 500 ns to 8800 ns | |
| Acquisition Time | 1200 ns | |
| Integral Nonlinearity (INL) | ±1.0 LSB (max) | |
| Differential Nonlinearity (DNL) | ±1.0 LSB (max) | |
| Signal-to-Noise Ratio (SNR) | 96 dB | |
| Total Harmonic Distortion (THD) | -115 dB |
Key Features
- True-Differential Input: Supports unipolar, true-differential analog input signals with a differential input swing of –VREF to +VREF.
- Low Power Consumption: Power consumption scales linearly with sampling speed, making it suitable for battery-operated instruments. It consumes 0.7 mW at 100 kSPS and 70 µW at 10 kSPS.
- SPI-Compatible Serial Interface: Supports daisy-chain operation for cascading multiple devices.
- Wide Common-Mode Voltage Range: Common-mode voltage can be any value in the range of 0 V to +VREF.
- Excellent AC and DC Performance: Features high SNR, low THD, and excellent linearity with ±1.0 LSB INL and DNL.
- Low Latency Output: No latency output, allowing for real-time data acquisition).
- Compact Packages: Available in MSOP-10 and SON-10 packages).
Applications
- Automatic Test Equipment (ATE): Suitable for high-speed data acquisition in test and measurement applications).
- Instrumentation and Process Controls: Ideal for precision measurement and control in industrial processes).
- Precision Medical Equipment: Used in medical devices requiring high accuracy and low power consumption).
- Low-Power, Battery-Operated Instruments: Optimized for use in portable and battery-powered devices).
Q & A
- What is the resolution of the ADS8867 ADC?
The ADS8867 has a resolution of 16 bits).
- What is the maximum sample rate of the ADS8867?
The maximum sample rate is 100 kSPS).
- What type of input does the ADS8867 support?
The ADS8867 supports true-differential analog input signals).
- What is the range of the reference voltage for the ADS8867?
The reference voltage range is from 2.5 V to 5 V).
- How much power does the ADS8867 consume at 100 kSPS?
The power consumption at 100 kSPS is 0.7 mW).
- What is the operating temperature range of the ADS8867?
The operating temperature range is from -40°C to +85°C).
- Does the ADS8867 support daisy-chain operation?
Yes, the ADS8867 supports daisy-chain operation for cascading multiple devices).
- What are the typical packages available for the ADS8867?
The ADS8867 is available in MSOP-10 and SON-10 packages).
- What are some common applications of the ADS8867?
Common applications include automatic test equipment, instrumentation and process controls, precision medical equipment, and low-power, battery-operated instruments).
- How does the power consumption of the ADS8867 scale with sampling speed?
The power consumption scales linearly with the sampling speed).
