Image for reference only
ADS8320E/2K5
VSSOP-8 (3x3mm)
The ADS8320E/2K5 from TI is a 16-bit 100kSPS SAR ADC with SPI interface, 2.7-5.25V supply, and 1.8mW power consumption in VSSOP-8 for precision data acquisition.
| Package | VSSOP-8 (3x3mm) |
The ADS8320E/2K5 from TI is a 16-bit 100kSPS SAR ADC with SPI interface, 2.7-5.25V supply, and 1.8mW power consumption in VSSOP-8 for precision data acquisition.
The ADS8320E/2K5 is a 16-bit 100kSPS SAR (Successive Approximation Register) ADC from TI in VSSOP-8, operating from 2.7V to 5.25V with SPI-compatible serial interface. The SAR conversion algorithm works by: 1) Sample the analog input on an internal hold capacitor (conversion starts on CS falling edge); 2) The 16-bit SAR register starts at MSB = 1, all others = 0; 3) The internal DAC converts this digital code to an analog voltage; 4) The comparator determines if the DAC output is higher or lower than the held input; 5) If DAC > input, MSB = 0; if DAC < input, MSB stays 1; 6) Repeat for each bit from MSB to LSB (16 comparisons total). The entire conversion takes 16 DCLK cycles plus 2 overhead cycles = 18 DCLK periods. At 2.4MHz DCLK, this gives 100kSPS throughput. The external VREF pin sets the full-scale range: VIN ranges from COM to VREF. Using a 2.5V reference gives 0-2.5V input range with 38uV LSB step size (2.5V / 65536). The /2K5 suffix denotes the 100kSPS speed grade and tape-and-reel packaging. The SHDN pin (active LOW) reduces power from 4.5mW to 0.3uW. The SPI interface is compatible with most MCUs: CS frames the conversion, DCLK shifts out data on DOUT MSB-first, with the first clock outputting the MSB result of the previous conversion.
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VREF | Analog Input | External reference voltage (0.5V to VDD) |
| 2 | COM | Analog Input | Analog common / negative input reference |
| 3 | IN+ | Analog Input | Non-inverting analog input |
| 4 | SHDN | Input | Shutdown (active low, internal pull-up) |
| 5 | DCLK | Input | Serial clock input (up to 24MHz) |
| 6 | DOUT | Output | Serial data output (MSB first) |
| 7 | CS | Input | Chip select (active low, frames conversion) |
| 8 | VDD | Power | Supply (2.7-5.25V) |
| Manufacturer | Part Number | Package | Notes |
|---|---|---|---|
| Texas Instruments | ADS8320IB/2K5 | VSSOP-8 | Same device, -40 to +125C grade |
| Texas Instruments | ADS7042IRUGR | X2QFN-8 | 12-bit 1MSPS ADC, ultra-small |
| Analog Devices | AD7685ARMZ | MSOP-10 | 16-bit 250kSPS ADC, similar spec |
| Microchip | MCP3422A0-E/SN | SOIC-8 | 18-bit ADC, I2C, delta-sigma |
| Maxim | MAX11602EEE+T | QSOP-16 | 8-bit 8-ch ADC, 300kSPS |
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
Brand:
Package:
Cargo cycle: 3~7 Days
The minimum order is 1
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