The TLC548CP from TI is an 8-bit 45.5kHz A/D converter with serial I/O interface and on-chip sample-and-hold in DIP-8 through-hole for simple analog-to-digital conversion.
| 包装 | DIP-8 (300mil) |
The TLC548CP from TI is an 8-bit 45.5kHz A/D converter with serial I/O interface and on-chip sample-and-hold in DIP-8 through-hole for simple analog-to-digital conversion.
The TLC548CP is an 8-bit successive approximation register (SAR) analog-to-digital converter from Texas Instruments in DIP-8, with 45.5kHz sampling rate and serial I/O interface. The conversion uses a capacitive DAC and comparator in a charge-redistribution architecture. A conversion begins when CS goes LOW: the previous result is shifted out on DATA OUT (MSB first) synchronized to I/O CLOCK, while the new analog input is sampled. After 8 clock cycles, the new conversion result is available. The sampling rate of 45.5kHz corresponds to a 22us total cycle time (8 clocks + internal conversion). The reference voltage inputs (REF+ and REF-) define the full-scale range: the digital output code 255 corresponds to ANALOG IN = REF+ – 1 LSB. With REF+ = 5.000V and REF- = 0V, 1 LSB = 5V/256 = 19.5mV. The analog input bandwidth extends to approximately 500kHz, but aliasing requires an anti-aliasing filter for signals above half the sample rate (22.75kHz). The input impedance is approximately 1GOhm (CMOS sample-and-hold), presenting minimal loading to the source. The differential nonlinearity (DNL) is +/-0.5 LSB typical, guaranteeing no missing codes. The total unadjusted error is +/-0.5 LSB. The device includes an on-chip system clock that controls the SAR conversion timing independently of I/O CLOCK. The CP suffix specifies DIP-8, commercial temperature (0C to +70C). The device is designed for simple 3-wire microcontroller interfaces where SPI is not available.
| 针脚 | 名称 | 类型 | 功能 |
|---|---|---|---|
| 1 | REF+ | 模拟 | Positive reference voltage input (typically 2.5V or 5V) |
| 2 | ANALOG IN | 模拟 | Analog input (0 to REF+ voltage range) |
| 3 | REF- | 模拟 | Negative reference voltage input (typically GND) |
| 4 | 接地 | 电源 | 地面 |
| 5 | CS | 输入 | Chip select (active LOW, starts conversion on falling edge) |
| 6 | DATA OUT | 输出 | Serial data output (MSB first, 8 bits per conversion) |
| 7 | I/O CLOCK | 输入 | Serial clock (shifts out data, up to 2.048MHz) |
| 8 | VCC | 电源 | Supply (4.75-5.25V) |
| 制造商 | 部件编号 | 包装 | 说明 |
|---|---|---|---|
| 德州仪器 | TLC549CP | DIP-8 | Same device, 40kHz sample rate version |
| 德州仪器 | TLC548ID | SOIC-8 | Same device, industrial temp, surface-mount |
| 马克西姆 | MAX1118CPA+ | DIP-8 | 8-bit 100kSPS ADC, SPI, 2.7-5.25V |
| 微型芯片 | MCP3008-I/P | DIP-16 | 10-bit 8-ch ADC, SPI, 200ksps |
| 德州仪器 | ADC081S101CIMF | SOT-23-6 | 8-bit 1Msps ADC, SPI, tiny package |
品牌:
封装:
货运周期：3~7 天
最低订购量为 1
品牌:
封装:
货运周期：3~7 天
最低订购量为 1
品牌:
封装:
货运周期：3~7 天
最低订购量为 1
品牌:
封装:
货运周期：3~7 天
最低订购量为 1
品牌:
封装:
货运周期：3~7 天
最低订购量为 1
品牌:
封装:
货运周期：3~7 天
最低订购量为 1
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