| Resolution (Bits) | 18 |
| Number of input channels | 1 |
| Sample rate (Max) (kSPS) | 1250 |
| Interface type | Parallel |
| Architecture | Delta-Sigma |
| Input type | Differential |
| Rating | Catalog |
| Reference mode | Ext, Int |
| Input range (Max) (V) | 4.8 |
| Input range (Min) (V) | 0 |
| Operating temperature range (C) | -40 to 85 |
| Power consumption (Typ) (mW) | 520 |
| Analog voltage AVDD (Min) (V) | 4.75 |
| SNR (dB) | 93 |
| Analog voltage AVDD (Max) (V) | 5.25 |
| INL (Max) (+/-LSB) | 3.5 |
| Digital supply (Min) (V) | 2.7 |
| Digital supply (Max) (V) | 5.25 |
- 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.
