Overview
The ADS8638SRGER, produced by Texas Instruments, is a 12-bit analog-to-digital converter (ADC) designed for demanding industrial measurement applications. This device utilizes a successive approximation register (SAR) core and features a sample-and-hold front-end with no latency in conversions. It is capable of measuring inputs up to ±10V at a sampling rate of 1MSPS. The ADS8638 includes an input multiplexer for measuring up to eight inputs, making it highly versatile for multi-channel applications.
The device is highly integrated, featuring an internal temperature sensor, voltage reference, and digital comparators for setting alarm thresholds on each input. This integration minimizes the need for external components. The ADS8638 operates over an extended industrial temperature range of –40°C to +125°C and is packaged in a small 4mm × 4mm QFN-24 package.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 12 bits | |||
| Sampling Rate | Up to 1MSPS | |||
| Input Range | ±10V, ±5V, ±2.5V, 0V to 10V, 0V to 5V | V | ||
| Integral Non-Linearity (INL) | ±0.9LSB | LSB | ||
| Signal-to-Noise Ratio (SNR) | 71.8dB | dB | ||
| Power Consumption at 1MSPS | 14.45mW | mW | ||
| Power Consumption at 0.1MSPS | 5.85mW | mW | ||
| Digital Supply Voltage | 1.8V | 3.3V | 5.25V | V |
| Operating Temperature Range | –40°C | +125°C | °C | |
| Package Type | QFN-24 (4mm × 4mm) | |||
Key Features
- Selectable Input Ranges: ±10V, ±5V, ±2.5V, 0V to 10V, or 0V to 5V, and up to ±12V with an external reference.
- No Latent Conversions: Up to 1MSPS sampling rate without latency.
- Outstanding Performance: 12-bit resolution with no missing codes, INL of ±0.9LSB, and SNR of 71.8dB.
- Highly Integrated: Includes an 8-channel input multiplexer, internal temperature sensor, internal voltage reference, and digital comparators for alarm thresholds.
- Low Power Consumption: 14.45mW at 1MSPS and 5.85mW at 0.1MSPS.
- Flexible Power-Down Mode: Allows for power management to reduce power consumption.
- SPI-Compatible Serial Interface: Simplifies communication and control with a wide range of processors and controllers.
- Extended Temperature Range: Operates from –40°C to +125°C.
- Small Footprint: Packaged in a 4mm × 4mm QFN-24 package.
Applications
- Industrial Process Controls (PLC): Ideal for monitoring and controlling industrial processes.
- Data Acquisition Systems: Suitable for high-speed data acquisition in various applications.
- High-Speed, Closed-Loop Systems: Used in systems requiring fast and precise feedback loops.
- Digital Power Supplies: Enhances the performance and control of digital power supply systems.
Q & A
- What is the resolution of the ADS8638SRGER?
The ADS8638SRGER has a 12-bit resolution.
- What are the selectable input ranges for the ADS8638SRGER?
The device supports input ranges of ±10V, ±5V, ±2.5V, 0V to 10V, and 0V to 5V, with the option to extend up to ±12V using an external reference.
- What is the maximum sampling rate of the ADS8638SRGER?
The maximum sampling rate is up to 1MSPS.
- Does the ADS8638SRGER have any latency in conversions?
No, the ADS8638SRGER does not have any latency in conversions.
- What is the power consumption of the ADS8638SRGER at 1MSPS?
The power consumption at 1MSPS is 14.45mW.
- What is the operating temperature range of the ADS8638SRGER?
The device operates from –40°C to +125°C.
- What type of package does the ADS8638SRGER come in?
The ADS8638SRGER is packaged in a 4mm × 4mm QFN-24 package.
- Does the ADS8638SRGER have an internal temperature sensor?
- What type of serial interface does the ADS8638SRGER use?
The device uses an SPI-compatible serial interface.
- How many input channels does the ADS8638SRGER support?
The ADS8638SRGER supports up to eight input channels.
