Overview
The ADS8885IDGSR is a high-performance, 18-bit successive approximation register (SAR) analog-to-digital converter (ADC) produced by Texas Instruments. This device is part of a family of 16- and 18-bit ADCs known for their compact design and low power consumption. The ADS8885IDGSR operates with a sample rate of 400 kSPS and features a true-differential input structure, making it suitable for a wide range of applications requiring high accuracy and low power dissipation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 18 Bits | |
| Sample Rate | 400 kSPS | |
| Input Type | True-Differential | |
| Input Range | -VREF to +VREF | V |
| Common-Mode Voltage Range | 0 V to VREF | V |
| Reference Voltage Range | 2.5 V to 5 V | V |
| Analog Supply Voltage (AVDD) | 2.7 V to 3.6 V | V |
| Digital Supply Voltage (DVDD) | 1.65 V to 3.6 V | V |
| Operating Temperature Range | -40°C to +85°C | °C |
| Power Consumption at 400 kSPS | 2.6 mW | mW |
| Power-Down Current | 50 nA | nA |
| Package | VSSOP-10 (DGS) |
Key Features
- SPI-compatible serial interface with daisy-chain option for cascading multiple devices
- No latency output
- Excellent AC and DC performance: SNR of 100 dB, THD of -115 dB, INL of ±1.5 LSB (typ), and DNL of ±1 LSB (max)
- Low-power dissipation: 2.6 mW at 400 kSPS, 0.65 mW at 100 kSPS, and 65 µW at 10 kSPS
- Wide common-mode voltage range: 0 V to VREF with 90-dB CMRR (min)
- Full-scale step settling to 18 bits in 1200 ns
- Optional busy-indicator bit for easy synchronization with the digital host
Applications
- Automatic Test Equipment (ATE)
- Instrumentation and Process Controls
- Precision Medical Equipment
- Low-Power, Battery-Operated Instruments
Q & A
- What is the resolution of the ADS8885IDGSR ADC?
The ADS8885IDGSR has a resolution of 18 bits.
- What is the sample rate of the ADS8885IDGSR?
The sample rate of the ADS8885IDGSR is 400 kSPS.
- What type of input does the ADS8885IDGSR support?
The ADS8885IDGSR supports true-differential input signals.
- What is the input range of the ADS8885IDGSR?
The input range of the ADS8885IDGSR is -VREF to +VREF.
- What is the common-mode voltage range of the ADS8885IDGSR?
The common-mode voltage range is 0 V to VREF with a minimum CMRR of 90 dB.
- What is the reference voltage range for the ADS8885IDGSR?
The reference voltage range is 2.5 V to 5 V.
- What are the power supply voltage ranges for the ADS8885IDGSR?
The analog supply voltage (AVDD) range is 2.7 V to 3.6 V, and the digital supply voltage (DVDD) range is 1.65 V to 3.6 V.
- What is the operating temperature range of the ADS8885IDGSR?
The operating temperature range is -40°C to +85°C.
- How much power does the ADS8885IDGSR consume at 400 kSPS?
The power consumption at 400 kSPS is 2.6 mW.
- What is the power-down current of the ADS8885IDGSR?
The power-down current is 50 nA.
