Overview
The ADS8885IDGS is an 18-bit, 400-kSPS (kilosamples per second), analog-to-digital converter (ADC) produced by Texas Instruments. This device features a true-differential input and an SPI-compatible serial interface, making it suitable for a wide range of applications requiring high precision and low power consumption. The ADC operates with an external reference voltage ranging from 2.5 V to 5 V, which is independent of the analog supply voltage (AVDD). This flexibility allows for various signal ranges without additional input signal scaling.
Key Specifications
| Specification | Value |
|---|---|
| Number of Bits | 18 |
| Sampling Rate | 400 kSPS |
| Input Type | True-Differential |
| Input Range | –VREF to +VREF |
| Common-Mode Voltage Range | 0 V to VREF |
| Analog Supply Voltage (AVDD) | 2.7 V to 3.6 V |
| Digital Supply Voltage (DVDD) | 1.65 V to 3.6 V |
| Reference Voltage (VREF) | 2.5 V to 5 V |
| Operating Temperature Range | –40°C to +85°C |
| Package Type | 10-VSSOP (DGS) |
| Power Consumption at 400 kSPS | 2.6 mW |
| Power Consumption at 100 kSPS | 0.65 mW |
| Power Consumption at 10 kSPS | 65 µW |
| Power-Down Current (AVDD) | 50 nA |
Key Features
- No Latency Output
- SPI-compatible serial interface with daisy-chain option
- Excellent AC and DC performance: SNR of 100 dB, THD of –115 dB, INL of ±1.5 LSB (typ), and DNL of +1.5 and –1 LSB (max)
- Wide common-mode voltage range with 90-dB CMRR (min)
- Low-power dissipation scaling with speed
- Full-scale step settling to 18 bits in 1200 ns
Applications
The ADS8885IDGS is suitable for various applications that require high precision, low power consumption, and a compact form factor. These include:
- Industrial automation and control systems
- Medical devices such as patient monitoring and diagnostic equipment
- Aerospace and defense systems requiring high reliability and precision
- Automotive systems, including sensor interfaces and data acquisition
- Test and measurement equipment
Q & A
- What is the resolution of the ADS8885IDGS ADC?
The ADS8885IDGS is an 18-bit analog-to-digital converter. - What is the maximum sampling rate of the ADS8885IDGS?
The maximum sampling rate is 400 kSPS. - What type of input does the ADS8885IDGS support?
The device supports true-differential analog input signals. - What is the range of the external reference voltage for the ADS8885IDGS?
The external reference voltage can range from 2.5 V to 5 V. - What is the operating temperature range of the ADS8885IDGS?
The operating temperature range is –40°C to +85°C. - What is the power consumption of the ADS8885IDGS at 400 kSPS?
The power consumption at 400 kSPS is 2.6 mW. - Does the ADS8885IDGS support daisy-chain operation?
Yes, it supports SPI-compatible serial interface with daisy-chain option. - What is the common-mode voltage range of the ADS8885IDGS?
The common-mode voltage range is 0 V to VREF. - How does the power consumption of the ADS8885IDGS scale with speed?
The power consumption directly scales with the sampling speed. - What is the package type of the ADS8885IDGS?
The package type is 10-VSSOP (DGS).
