Overview
The ADS850Y/250 is a high-performance, 14-bit Analog-to-Digital Converter (ADC) produced by Texas Instruments. This ADC is designed for applications requiring high dynamic range and low distortion. It features a fully differential input, allowing for either single-ended or differential input configurations, and supports a sampling rate of 10 million samples per second (MSPS). The ADS850Y/250 includes advanced digital error correction techniques and a self-calibrating mechanism to ensure 14-bit linearity and correct for capacitor and gain mismatches. The device is available in a 48-pin TQFP package and is compatible with +3V/+5V logic I/O.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Resolution | 14 | Bits | |||
| Specified Temperature Range | -40 | 85 | °C | ||
| Sample Rate | 10k | 10M | Samples/s | ||
| Analog Input Range (Single-Ended) | VREF = 1.0V | 1.5 | 3.5 | V | |
| Analog Input Range (Differential) | VREF = 2.0V | 1.5 | 3.5 | V | |
| Common-Mode Voltage | 2.5 | V | |||
| Input Capacitance | 20 | pF | |||
| Analog Input Bandwidth | -3dBFS | 270 | MHz | ||
| Spurious-Free Dynamic Range (SFDR) | f = 4.8MHz, -1dB input, 4Vp-p | 75 | 85 | dBFS | |
| Signal-to-Noise Ratio (SNR) | f = 4.8MHz, -1dB input, 4Vp-p | 71 | 76 | dBFS | |
| Power Dissipation | VDRV = 3V, Internal Reference | 250 | 275 | mW | |
| Supply Voltage | +VS Operating | 4.7 | 5.0 | 5.3 | V |
Key Features
- High dynamic range with 14-bit resolution and 10 MSPS sampling rate.
- Fully differential input allowing for single-ended or differential input configurations.
- Self-calibrating mechanism to ensure 14-bit linearity and correct for capacitor and gain mismatches.
- High-bandwidth track-and-hold providing excellent spurious performance up to and beyond the Nyquist rate.
- Internal or external reference options with programmable input ranges (2Vp-p or 4Vp-p).
- Over-range indicator flag to indicate if the input has exceeded the full-scale input range.
- +3V/+5V logic I/O compatibility.
- Low power consumption with 250mW typical power dissipation.
Applications
- IF and baseband digitization.
- CCD imaging scanners.
- Test instrumentation.
- IR imaging.
- Communications and imaging applications requiring high signal-to-noise ratio and low distortion.
Q & A
- What is the resolution and sampling rate of the ADS850Y/250?
The ADS850Y/250 has a 14-bit resolution and a sampling rate of 10 MSPS.
- What types of input configurations are supported by the ADS850Y/250?
The ADS850Y/250 supports both single-ended and differential input configurations.
- Does the ADS850Y/250 have self-calibration capabilities?
Yes, the ADS850Y/250 features a self-calibrating mechanism to ensure 14-bit linearity and correct for capacitor and gain mismatches.
- What are the available input ranges for the ADS850Y/250?
The ADS850Y/250 can be programmed for input ranges of 2Vp-p or 4Vp-p, or set to a range between these values, and also supports an external reference.
- What is the power consumption of the ADS850Y/250?
The typical power dissipation of the ADS850Y/250 is 250mW with an internal reference and VDRV = 3V.
- What is the package type and pin count of the ADS850Y/250?
The ADS850Y/250 is available in a 48-pin TQFP package.
- What are the key applications of the ADS850Y/250?
The ADS850Y/250 is used in IF and baseband digitization, CCD imaging scanners, test instrumentation, IR imaging, and other applications requiring high signal-to-noise ratio and low distortion.
- Does the ADS850Y/250 have an over-range indicator?
Yes, the ADS850Y/250 includes an over-range indicator flag to indicate if the input has exceeded the full-scale input range.
- What is the logic compatibility of the ADS850Y/250?
The ADS850Y/250 is compatible with +3V/+5V logic I/O.
- How does the calibration procedure work for the ADS850Y/250?
The calibration procedure is initiated by a positive pulse on the CAL pin and takes approximately 3.28ms to complete at 10MSPS.
