Overview
The ADS8865IDGS from Texas Instruments is a 16-bit, 400-kSPS (kilosamples per second), single-channel Successive Approximation Register (SAR) analog-to-digital converter (ADC). This device features a true-differential input and an SPI-compatible serial interface with daisy-chain capability, allowing for the cascading of multiple devices. The ADS8865 is designed for high-performance applications requiring low power consumption and excellent AC and DC performance.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16 Bits | |
| Sample Rate | 400 kSPS | |
| Input Type | True-Differential | |
| Analog Supply Voltage (AVDD) | 2.7 V to 3.6 V | V |
| Digital Supply Voltage (DVDD) | 1.65 V to 3.6 V | V |
| Reference Voltage (VREF) | 2.5 V to 5 V | V |
| Operating Temperature | -40°C to +85°C | °C |
| Power Consumption at 400 kSPS | Approx. 5.5 mW | mW |
| Conversion Time | 500 ns to 710 ns | ns |
| Acquisition Time | 290 ns | ns |
| Integral Linearity (INL) | ±2.0 LSB (max) | LSB |
| Differential Linearity (DNL) | ±1.0 LSB (max) | LSB |
| Signal-to-Noise + Distortion (SINAD) | Typically 93 dB | dB |
| Total Harmonic Distortion (THD) | Typically -108 dB | dB |
Key Features
- True-Differential Input: Supports true-differential analog input, enhancing signal integrity and noise rejection.
- SPI-Compatible Serial Interface: Features an SPI-compatible interface with daisy-chain capability, enabling easy integration and cascading of multiple devices.
- Low Power Consumption: Offers low power dissipation, making it suitable for battery-operated and power-sensitive applications.
- High AC and DC Performance: Exhibits excellent AC and DC performance with high SINAD, low THD, and tight INL and DNL specifications.
- Wide Operating Range: Operates over a wide range of supply voltages and temperatures, providing flexibility in various application environments.
- Compact Packaging: Available in VSSOP-10 and VSON-10 packages, ideal for space-constrained designs.
Applications
- Automatic Test Equipment (ATE): Suitable for high-precision measurement and testing applications.
- Instrumentation and Process Controls: Used in industrial control systems and precision instrumentation.
- Precision Medical Equipment: Ideal for medical devices requiring high accuracy and reliability.
- Low-Power, Battery-Operated Instruments: Optimized for power efficiency, making it suitable for portable and battery-powered devices.
Q & A
- What is the resolution of the ADS8865 ADC?
The ADS8865 has a resolution of 16 bits.
- What is the maximum sample rate of the ADS8865?
The maximum sample rate is 400 kSPS.
- What type of input does the ADS8865 support?
The ADS8865 supports true-differential analog input.
- What is the operating temperature range of the ADS8865?
The operating temperature range is -40°C to +85°C.
- How much power does the ADS8865 consume at 400 kSPS?
The power consumption at 400 kSPS is approximately 5.5 mW.
- What is the conversion time of the ADS8865?
The conversion time ranges from 500 ns to 710 ns.
- What is the acquisition time of the ADS8865?
The acquisition time is 290 ns.
- What are the typical values for SINAD and THD of the ADS8865?
The typical SINAD is 93 dB, and the typical THD is -108 dB.
- Does the ADS8865 support daisy-chaining?
- In what packages is the ADS8865 available?
The ADS8865 is available in VSSOP-10 and VSON-10 packages.
