Overview
The ADS8867IDGS 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-performance, successive approximation register (SAR) ADC family. It features a compact design, low power consumption, and an architecture based on charge redistribution, which includes an internal sample-and-hold (S/H) function. The ADS8867 supports true-differential analog input signals and operates with a wide range of reference voltages, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16 | Bits |
| Sample Rate | 100 | kSPS |
| Analog Supply Voltage (AVDD) | 2.7 to 3.6 | V |
| Digital Supply Voltage (DVDD) | 1.65 to 3.6 | V |
| Reference Voltage (VREF) | 2.5 to 5 | V |
| Input Range | –VREF to +VREF | V |
| Common-Mode Voltage Range | 0 V to VREF | V |
| Integral Nonlinearity (INL) | ±1.0 LSB (max) | LSB |
| Differential Nonlinearity (DNL) | ±1.0 LSB (max) | LSB |
| Signal-to-Noise Ratio (SNR) | 96 dB | dB |
| Total Harmonic Distortion (THD) | –115 dB | dB |
| Conversion Time | 500 to 8800 ns | ns |
| Acquisition Time | 1200 ns | ns |
| Operating Temperature | –40 to +85°C | °C |
| Power Consumption at 100 kSPS | 0.7 mW | mW |
| Power-Down Current (AVDD) | 50 nA | nA |
Key Features
- True-Differential Input: Supports unipolar, true-differential analog input signals with a differential input swing of –VREF to +VREF.
- Wide Common-Mode Voltage Range: Allows for a common-mode voltage of any value in the range of 0 V to +VREF.
- SPI-Compatible Serial Interface: Supports daisy-chain operation for cascading multiple devices.
- No Latency Output: Conversion results are available immediately after the conversion is complete.
- Low Power Consumption: Power dissipation scales linearly with sampling speed, making it suitable for battery-operated instruments.
- High Performance: Excellent AC and DC performance with SNR of 96 dB and THD of –115 dB.
- Compact Packages: Available in MSOP-10 and SON-10 packages.
Applications
- Automatic Test Equipment (ATE): Ideal for high-speed data acquisition and testing.
- Instrumentation and Process Controls: Suitable for precision measurement and control systems.
- Precision Medical Equipment: Used in medical devices requiring high accuracy and low power consumption.
- Low-Power, Battery-Operated Instruments: Perfect for 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 is the range of the reference voltage for the ADS8867?
The reference voltage range is from 2.5 V to 5 V.
- What type of input does the ADS8867 support?
The ADS8867 supports true-differential analog input signals.
- What is the common-mode voltage range for the ADS8867?
The common-mode voltage range is from 0 V to +VREF.
- How does the power consumption of the ADS8867 scale?
Power consumption scales linearly with the sampling speed.
- What is the typical power consumption at 100 kSPS?
The typical power consumption at 100 kSPS is 0.7 mW.
- What is the power-down current for the ADS8867?
The power-down current is 50 nA.
- What types of packages are 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.
