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The ADS1625 and ADS1626 are high-speed, high-precision, delta-sigma analog-to-digital converters (ADCs) with 18-bit resolution. The data rate is 1.25 mega samples per second (MSPS), the bandwidth (-3dB) is 615kHz, and passband ripple is less than ±0.0025dB (to 550kHz). Both devices offer the same outstanding performance at these speeds with a signal-to-noise ratio up to 93dB, total harmonic distortion down to -101dB, and a spurious-free dynamic range up to 103dB. The ADS1626 includes an adjustable first-in, first-out buffer (FIFO) for the output data.
The input signal is measured against a voltage reference that can be generated on-chip or supplied externally. The digital output data is provided over a simple parallel interface that easily connects to digital signal processors (DSPs). An out-of-range monitor reports when the input range has been exceeded. The ADS1625/6 operate from a +5V analog supply (AVDD) and +3V digital supply (DVDD). The digital I/O supply (IOVDD) operates from +2.7 to +5.25V, enabling the digital interface to support a range of logic families. The analog power dissipation is set by an external resistor and can be reduced when operating at slower speeds. A power-down mode, activated by a digital I/O pin, shuts down all circuitry. The ADS1625/6 are offered in a TQFP-64 package using TI PowerPAD™ technology.
The ADS1625 and ADS1626, along with their 16-bit, 5MSPS counterparts, the ADS1605 and ADS1606, are well-suited for the demanding measurement requirements of scientific instrumentation, automated test equipment, data acquisition, and medical imaging.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | 18-Bit, 1.25MSPS Analog-to-Digital Converter datasheet (Rev. E) | May 21, 2007 | |
| Application note | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | Mar 29, 2023 | |
| Application note | ADS16xx Reference Options (Rev. A) | PDF | HTML | Mar 9, 2022 | |
| E-book | Fundamentals of Precision ADC Noise Analysis (Rev. A) | Jun 19, 2020 | ||
| White paper | Voltage-reference impact on total harmonic distortion | Aug 1, 2016 | ||
| E-book | Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs | Mar 19, 2015 |
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The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTQFP (PAP) | 64 | Ultra Librarian |
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