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TLC2543CDW
SOIC-20 (300mil)
The TLC2543CDW from TI is a 12-bit, 11-channel successive approximation ADC with SPI interface operating at 66ksps, suitable for data acquisition systems requiring multiple analog input channels.
| Package | SOIC-20 (300mil) |
The TLC2543CDW from TI is a 12-bit, 11-channel successive approximation ADC with SPI interface operating at 66ksps, suitable for data acquisition systems requiring multiple analog input channels.
The TLC2543CDW is a 12-bit 11-channel ADC from Texas Instruments in SOIC-20, using a successive approximation register (SAR) architecture with switched-capacitor input. The conversion process: (1) The analog input is sampled by connecting the internal sampling capacitor to the selected AIN channel through the multiplexer for 4 I/O CLK cycles (acquisition time); (2) The capacitor is disconnected and the SAR begins binary search: the MSB is tested first, the capacitor DAC applies VREF/2 to the comparator; if the input is higher, the MSB is set; if lower, it is cleared; (3) This continues for all 12 bits, requiring 12 I/O CLK cycles; (4) The result is shifted out on DATA OUT while the next command is shifted in on DATA IN. The total conversion time is 10us (66ksps throughput at 4.1MHz I/O CLK). The 11 analog inputs can be configured for single-ended (11 channels vs GND) or differential (5 pairs) mode via the command register. The internal 2.5V reference provides 0-2.5V input range, or an external reference can be applied to REF+ for custom ranges. The EOC (End-of-Conversion) pin goes LOW during conversion and HIGH when complete, allowing polling or interrupt-driven operation. The CS (Chip Select) pin enables the SPI interface. The device uses a 16-bit SPI frame: 4-bit command (channel select + output format) shifted in during the first 4 clocks, followed by 12-bit result shifted out during the remaining 12 clocks. The output can be MSB-first or LSB-first, and the data length can be 8, 12, or 16 bits. The -CDW suffix specifies SOIC-20, commercial temperature (0C to +70C).
| Pin | Name | Type | Function |
|---|---|---|---|
| 1-4 | AIN0-AIN3 | Analog | Analog inputs 0-3 (multiplexed to internal ADC) |
| 5-8 | AIN4-AIN7 | Analog | Analog inputs 4-7 |
| 9-10 | AIN8-AIN9 | Analog | Analog inputs 8-9 |
| 11-14 | AIN10/CS/DATA OUT/DATA IN | Analog/I/O | Input 10 / SPI chip select / SPI data out / SPI data in |
| 15-16 | EOC/I/O CLK | Output/Input | End-of-conversion / SPI clock |
| 17-18 | REF+/REF- | Analog | Positive/negative voltage reference inputs |
| 19-20 | VCC/GND | Power | 4.5-5.5V supply / ground |
| Manufacturer | Part Number | Package | Notes |
|---|---|---|---|
| Texas Instruments | TLC2543CDW | SOIC-20 | Same device, TI brand |
| Texas Instruments | TLC2543IDW | SOIC-20 | Industrial temp (-40C to +85C) |
| Analog Devices | AD7915BRMZ | MSOP-10 | 12-bit 1MSPS ADC, SPI, fewer pins |
| Microchip | MCP3208-CI/P | DIP-16 | 12-bit 8-ch ADC, SPI, 100kSPS |
| Maxim | MAX1270ACWI | SOIC-28 | 12-bit 8-ch ADC, SPI, +/-10V input range |
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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