引脚定义与内部结构
| 引脚 | 符号 | 名称 |
|---|---|---|
| 5 | SCL | |
| 6 | V | |
| 7 | SDA | |
| 8 | SCL |
数据来源：原厂规格书引脚图
关键参数速览
- 正向电压 VF
- 100 kHz
- 正向电流 IF
- 0.6V
- 工作温度 TA
- +125
- 传输速率
- SPS 12 bits
产品特点 Features
- 16-bit ΔΣ ADC with Differential Inputs:
- 2 channels: MCP3426 and MCP3427
- 4 channels: MCP3428
- Differential Input Full Scale Range: -V to
- Self Calibration of Internal Offset and Gain per
- Each Conversion
- On-Board Voltage Reference (V ):
- Accuracy: 2.048V ± 0.05%
- The MCP3426, MCP3427 and MCP3428 devices
- (MCP3426/7/8) are the low noise and high accuracy
- 16 Bit Delta-Sigma Analog-to-Digital (ΔΣ A/D) Con- verter family members of the MCP342X series from analog inputs to digital codes with up to 16 bits of reso- lution.
- The MCP3426 and MCP3427 devices have two differential input channels and the MCP3428 has four
- Microchip products meet the specification contained in their
- Microchip believes that its family of products is one of the intended manner and under normal conditions.
- There are dishonest and possibly illegal methods used to knowledge, require using the Microchip products in a
- Sheets. Most likely, the person doing so is engaged in theft
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。
| Exposure | to | maximum | 额定值 | 条件 | for | extended | periods |
|---|---|---|---|---|---|---|---|
| operational | listings | of this | specification | is not | implied. |
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 |
|---|---|---|---|---|---|---|
| A | DD | SS | ||||
| CHn+ = CHn- = V /2, V | = V /2. All | ppm units | use 2*V as | differential full | scale range. | |
| REF | INCOM REF | REF | ||||
| Differential Full Scale Input | FSR | — | ±2.048/PGA | — | V V = | [CHn+ - CHn-] |
| Maximum Input Voltage Range | V -0.3 | — | V +0.3 | V (Note | 1) | |
| Differential Input Impedance | Z (f) | — | 2.25/PGA | — | MΩ During (Note | normal mode operation 2) |
| Common Mode input | Z (f) | — | 25 | — | MΩ PGA = | 1, 2, 4, 8 |
| 14 | — | — | Bits DR = | 60 SPS | ||
| 16 | — | — | Bits DR = | 15 SPS | ||
| Data Rate | DR | 176 | 240 | 328 | SPS 12 bits | mode |
| 44 | 60 | 82 | SPS 14 bits | mode | ||
| 11 | 15 | 20.5 | SPS 16 bits | mode | ||
| Output Noise | — | 2.5 | — | µV T = | +25°C, DR =15 SPS, | |
| PGA = | 1, V + = V - = GND | |||||
| Integral Non-Linearity | INL | — | 10 | — | ppm of DR = FSR (Note | 15 SPS 5) |
| Internal Reference Voltage | V | — | 2.048 | — | V | |
| Gain Error (Note 6) | — | 0.1 | — | % PGA = | 1, DR = 15 SPS | |
| PGA Gain Error Match (Note | 6) | — | 0.1 | — | % Between | any 2 PGA settings |
| Gain Error Drift (Note 6) | — | 15 | — | ppm/°C PGA=1, | DR=15 SPS | |
| A | DD | SS | ||||
| CHn+ = CHn- = V /2, V | = V /2. All | ppm units | use 2*V as | differential full | scale range. | |
| REF | INCOM REF | REF | ||||
| Offset Error | V | — | 30 | — | µV PGA = DR = | 1 15 SPS |
| Offset Drift vs. Temperature | — | 50 | — | nV/°C | ||
| Gain vs. V | — | 5 | — | ppm/V T = | +25°C, V = 2.7V to 5.5V, | |
| DD | A PGA = | DD 1 | ||||
| Power Supply Rejection at | DC | — | 100 | — | dB T = | +25°C, V = 2.7V to 5.5V, |
| Input | PGA = | 1 | ||||
| Voltage Range | V | 2.7 | — | 5.5 | V | |
| Supply Current during | I | — | 145 | 180 | µA V = | 5.0V |
| — | 135 | — | µA V = | 3.0V | ||
| Supply Current during Standby | I | — | 0.3 | 1 | µA V = | 5.0V |
| IH | DD | DD | ||||
| Low level output voltage | V | — | — | 0.4 | V I = 3 | mA |
| Hysteresis of Schmidt Trigger | V | 0.05V | — | — | V f = | 100 kHz |
| HYST | DD | SCL | ||||
| Supply Current when I2C bus | I | — | — | 10 | µA Device | is in standby mode while |
| line is active | I2C bus | is active | ||||
| Input Leakage Current | I | — | — | 1 | µA V = | 5.5V |
| I | -1 | — | — | µA V = (Note | GND 9) | |
| — | V /2 | — | Device | outputs float output | ||
| pin, if | left “floating”. (Note 10) | |||||
| Pin capacitance | C | — | 4 | 10 | pF | |
| I2C Bus Capacitance | C | — | — | 400 | pF | |
| Specified Temperature Range | T | -40 | — | +85 | °C | |
| Operating Temperature Range | T | -40 | — | +125 | °C | |
| Storage Temperature Range | T | -65 | — | +150 | °C | |
| Thermal Resistance, 8L-DFN | (2x3) θ | — | 84.5 | — | °C/W | |
| Thermal Resistance, 8L-MSOP | θ | — | 211 | — | °C/W | |
| Thermal Resistance, 8L-SOIC | θ | — | 149.5 | — | °C/W | |
| Thermal Resistance, 10L-DFN | (3x3) θ | — | 57 | — | °C/W | |
| Thermal Resistance, 10L-MSOP | θ | — | 202 | — | °C/W | |
| Thermal Resistance, 14L-SOIC | θ | — | 120 | — | °C/W | |
| Thermal Resistance, 14L-TSSOP | θ | — | 100 | — | °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。