ADS1626
18 Bit, 1.25MSPS Single Channel Delta-Sigma ADC Single with an adjustable FIFO
ADS1626
- Data Rate: 1.25MSPS
- Signal-to-Noise Ratio: 93dB
- Total Harmonic Distortion: –101dB
- Spurious-Free Dynamic Range: 103dB
- Linear Phase with 615kHz Bandwidth
- Passband Ripple: ±0.0025dB
- Adjustable FIFO Output Buffer (ADS1626 only)
- Selectable On-Chip Reference
- Directly Connects to TMS320C6000 DSPs
- Adjustable Power Dissipation: 150 to 515mW
- Power Down Mode
- Supplies:
Analog +5V
Digital +3V
Digital I/O +2.7 to +5.25V - APPLICATIONS
- Scientific Instruments
- Automated Test Equipment
- Data Acquisition
- Medical Imaging
- Vibration Analysis
PowerPAD is a trademark of Texas Instruments. All other trademarks are the property of their respective owners.
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.
Technical documentation
Type | Title | Date | ||
---|---|---|---|---|
* | Data sheet | 18-Bit, 1.25MSPS Analog-to-Digital Converter datasheet (Rev. E) | 21 May 2007 | |
Application note | Digital Filter Types in Delta-Sigma ADCs (Rev. A) | PDF | HTML | 29 Mar 2023 | |
Application note | ADS16xx Reference Options (Rev. A) | PDF | HTML | 09 Mar 2022 | |
E-book | Fundamentals of Precision ADC Noise Analysis | 19 Jun 2020 | ||
White paper | Voltage-reference impact on total harmonic distortion | 01 Aug 2016 | ||
E-book | Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs | 19 Mar 2015 |
Design & development
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ANALOG-ENGINEER-CALC — PC software analog engineer's calculator
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 (...)
Supported products & hardware
Products
Precision op amps (Vos<1mV)
General-purpose op amps
Audio op amps
Transimpedance amplifiers
High-speed op amps (GBW ≥ 50 MHz)
Power op amps
Video amplifiers
Line drivers
Transconductance amplifiers & laser drivers
Fully differential amplifiers
Precision ADCs
Biosensing AFEs
High-speed ADCs (≥10 MSPS)
Receivers
Touchscreen controllers
Difference amplifiers
Instrumentation amplifiers
Audio line receivers
Analog current-sense amplifiers
Digital power monitors
Analog current-sense amplifiers with integrated shunt resistor
Digital power monitors with integrated shunt resistor
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TINA-TI — SPICE-based analog simulation program
Package | Pins | CAD symbols, footprints & 3D models |
---|---|---|
HTQFP (PAP) | 64 | Ultra Librarian |
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