The ADS8339 is a 16-bit, 250-kSPS, analog-to-digital converter (ADC). The device operates with a 2.25-V to 5.5-V external reference. The device includes a capacitor-based, successive-approximation register (SAR) ADC with an inherent sample-and-hold circuit.
The device includes a 25-MHz, SPI-compatible serial interface. The interface is designed to support daisy-chaining or cascading of multiple devices. Furthermore, a busy indicator makes synchronizing with the digital host easy. The unipolar, single-ended input range for the device supports an input swing of 0 V to Vref.
The device is optimized for low-power operation and power consumption scales directly with speed. This feature makes the device attractive for lower speed applications. The ADS8339 is available in a VSSOP-10 package.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
ADS8339 | VSSOP (10) | 3.00 mm × 3.00 mm |
Changes from * Revision (June 2014) to A Revision
SAMPLING RATE | 16-BIT, SINGLE-ENDED | 16-BIT, DIFFERENTIAL | 18-BIT, DIFFERENTIAL |
---|---|---|---|
100 kSPS | ADS8866 | ADS8867 | ADS8887 |
250 kSPS | ADS8339 | — | — |
400 kSPS | ADS8864 | ADS8865 | ADS8885 |
500 kSPS | ADS8319 | ADS8318 | — |
680 kSPS | ADS8862 | ADS8863 | ADS8883 |
1 MSPS | ADS8860 | ADS8861 | ADS8881 |
PIN | FUNCTION | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1 | REFIN | Input | Reference (positive) input. Decouple to GND with a 0.1-μF bypass capacitor and a 10-μF storage capacitor. |
2 | +VA | Supply | Analog power supply. Decouple with the GND pin. |
3 | +IN | Input | Noninverting analog signal input |
4 | –IN | Input | Inverting analog signal input. Note that this input has a limited range of ±0.1 V and is typically grounded at the input decoupling capacitor. |
5 | GND | Supply | Device ground. Note that this pin is a common ground pin for both the analog power supply (+VA) and digital I/O supply (+VBD). |
6 | CONVST | Input | Convert input. CONVST also functions as the CS input in 3-wire interface mode. Refer to the Description and Timing Diagrams sections for more details. |
7 | SDO | Output | Serial data output |
8 | SCLK | Input | Serial I/O clock input. Data (on the SDO output) are synchronized with this clock. |
9 | SDI | Input | Serial data input. The SDI level at the start of a conversion selects the mode of operation (such as CS or daisy-chain mode). SDI also serves as the CS input in 4-wire interface mode. Refer to the Description and Timing Diagrams sections for more details. |
10 | +VBD | Supply | Digital I/O power supply. Decouple with the GND pin. |