引脚定义与内部结构
| 引脚 | 符号 | 名称 |
|---|---|---|
| 5 | LDAC | |
| 6 | V | |
| 7 | V | |
| 8 | V |
数据来源：原厂规格书引脚图
关键参数速览
- 工作温度 TA
- °C Note 1
产品特点 Features
- MCP4802: Dual 8-Bit Voltage Output DAC
- MCP4812: Dual 10-Bit Voltage Output DAC
- MCP4822: Dual 12-Bit Voltage Output DAC
- Rail-to-Rail Output
- SPI Interface with 20 MHz Clock Support
- Simultaneous Latching of the Dual DACs with LDAC pin
- Fast Settling Time of 4.5 µs
- Selectable Unity or 2x Gain Output
- 2.048V Internal Voltage Reference
- 50 ppm/°C V Temperature Coefficient
- 2.7V to 5.5V Single-Supply Operation
- Extended Temperature Range: -40°C to +125°C
- The MCP4802/4812/4822 devices are dual 8-bit, 10-bit and 12-bit buffered voltage output Digital-to-Analog
- Converters (DACs), respectively. The devices operate from a single 2.7V to 5.5V supply with SPI compatible
- Serial Peripheral Interface.
- The devices have a high precision internal voltage reference (V = 2.048V). The user can configure the
绝对最大额定值 Absolute Maximum Ratings（TA = 25°C）
超过下表数值可能造成器件永久损坏，设计时请留余量。
| is | not | implied. | Exposure | to | maximum | 额定值 | 条件 |
|---|---|---|---|---|---|---|---|
| indicated | in the | operational | listings of | this | specification | ||
| for | extended | periods | may affect | device | reliability. |
数据来源：原厂规格书
电气特性 Electrical Characteristics（TA = 25°C）
| 参数 | 符号 | 最小 | 典型 | 最大 | 单位 | 条件 |
|---|---|---|---|---|---|---|
| Electrical Specifications: | Unless otherwise | indicated, V | = 5V, V | = 0V, V | = 2.048V, | |
| L | L | A | ||||
| Input Voltage | V | 2.7 | — | 5.5 | V | |
| Input Current | I | — | 415 | 750 | µA All | digital inputs are grounded, |
| all | analog outputs (V ) are | |||||
| unloaded. | Code = 0x000h | |||||
| Software Shutdown Current | I | — | 3.3 | 6 | µA | |
| Power-on Reset Threshold | V | — | 2.0 | — | V | |
| Resolution | n | 8 | — | — | Bits | |
| INL Error | INL | -1 | ±0.125 | 1 | LSb | |
| DNL | DNL | -0.5 | ±0.1 | +0.5 | LSb Note | 1 |
| Resolution | n | 10 | — | — | Bits | |
| INL Error | INL | -3.5 | ±0.5 | 3.5 | LSb | |
| DNL | DNL | -0.5 | ±0.1 | +0.5 | LSb Note | 1 |
| Resolution | n | 12 | — | — | Bits | |
| INL Error | INL | -12 | ±2 | 12 | LSb | |
| DNL | DNL | -0.75 | ±0.2 | +0.75 | LSb Note | 1 |
| Offset Error | V | -1 | ±0.02 | 1 | % of FSR Code | = 0x000h |
| Offset Error Temperature | V /°C | — | 0.16 | — | ppm/°C -45°C | to +25°C |
| — | -0.44 | — | ppm/°C +25°C | to +85°C | ||
| Gain Error | g | -2 | -0.10 | 2 | % of FSR Code | = 0xFFFh, |
| not | including offset error | |||||
| Gain Error Temperature | G/°C | — | -3 | — | ppm/°C | |
| Electrical Specifications: | Unless otherwise | indicated, V | = 5V, V | = 0V, V | = 2.048V, | |
| L | L | A | Code | = 0xFFFh | ||
| Temperature Coefficient | V /°C | — | 125 | 325 | ppm/°C -40°C | to 0°C |
| — | 0.25 | 0.65 | LSb/°C -40°C | to 0°C | ||
| — | 45 | 160 | ppm/°C 0°C | to +85°C | ||
| — | 0.09 | 0.32 | LSb/°C 0°C | to +85°C | ||
| Output Noise (V Noise) | E | — | 290 | — | µV Code | = 0xFFFh, G = 1x |
| REF | NREF | p-p | ||||
| Output Noise Density | e | — | 1.2 | — | µV/Hz Code | = 0xFFFh, G = 1x |
| e | — | 1.0 | — | µV/Hz Code | = 0xFFFh, G = 1x | |
| 1/f Corner Frequency | f | — | 400 | — | Hz | |
| Output Swing | V | — | 0.01 to | — | V Accuracy | is better than 1 LSb for |
| V – 0.04 | V | = 10 mV to (V –40 mV) | ||||
| DD | OUT | DD | ||||
| Phase Margin | PM | — | 66 | — | Degree C = | 400 pF, R = |
| Slew Rate | SR | — | 0.55 | — | V/µs | |
| Short Circuit Current | I | — | 15 | 24 | mA | |
| Settling Time | t | — | 4.5 | — | µs Within | 1/2 LSb of final value from |
| 1/4 to | 3/4 full-scale range | |||||
| DAC-to-DAC Crosstalk | — | <10 | — | nV-s | ||
| Major Code Transition | Glitch | — | 45 | — | nV-s 1 LSb | change around major carry |
| (0111...1111 to 1000...0000) | ||||||
| Digital Feedthrough | — | <10 | — | nV-s | ||
| Analog Crosstalk | — | <10 | — | nV-s | ||
| AC CHARACTERISTICS | (SPI | TIMING | SPECIFICATIONS) | |||
| CS High Time | t | 15 | — | — | ns Note | 1 |
| LDAC Pulse Width | t | 100 | — | — | ns Note | 1 |
| LDAC Setup Time | t | 40 | — | — | ns Note | 1 |
| SCK Idle Time before CS | Fall t | 40 | — | — | ns Note | 1 |
| t CSSR | t MSb in | HI t LO | t CHS LSb in | |||
| Electrical Specifications: | Unless otherwise | indicated, | V = +2.7V | to +5.5V, | V = GND. | |
| Specified Temperature Range | T | -40 | — | +125 | °C | |
| Operating Temperature | Range T | -40 | — | +125 | °C Note 1 | |
| Storage Temperature Range | T | -65 | — | +150 | °C | |
| Thermal Resistance, 8L-MSOP | | — | 211 | — | °C/W | |
| Thermal Resistance, 8L-PDIP | | — | 90 | — | °C/W | |
| Thermal Resistance, 8L-SOIC | | — | 150 | — | °C/W |
应用领域 Applications
产品应用与封装尺寸
图纸取自该型号原厂规格书的应用电路与封装尺寸章节，点击图片可放大查看原始尺寸标注。