Maxim Integrated Integrated MAX5825 8通道12位数模转换器
Maxim Integrated MAX5825 8通道、12位DAC为电压输出数模转换器，带有输出缓冲器和3ppm/℃的2.048V、2.500V或4.096V可选择基准。Maxim Integrated MAX5825 DAC可承受2.7V至5.5V的宽幅电源电压范围，具有超低功耗(6mW)，适合绝大多数低压应用。外部精密基准输入用于支持轨到轨满幅工作，对外部基准具有100kΩ (典型值)的等效负载阻抗。MAX5825 采用 I²C兼容、2线接口，可在高达400kHz时钟速率下工作。DAC输出带有缓冲，提供每通道小于250µA的低供电电流以及±0.5mV (典型值)的低偏移误差。上电时，MAX5825根据低电平有效M/Z的逻辑输入状态将DAC输出复位至零或中间值，为大多数控制系统提供灵活性。MAX5825 内置看门狗功能，使能后用于监测I/O接口的动作及信号完整性操作。
特性
- Eight High-Accuracy DAC Channels
- 12-Bit Accuracy Without Adjustment
- ±1 LSB INL Buffered Voltage Output
- Guaranteed Monotonic Over All Operating Conditions
- Independent Mode Settings for Each DAC
- Three Precision Selectable Internal References
- 2.048V, 2.500V, or 4.096V
- Internal Output Buffer
- Rail-to-Rail Operation with External Reference
- 4.5µs Settling Time
- Outputs Directly Drive 2kΩ Loads
- Wide 2.7V to 5.5V Supply Range
- Separate 1.8V to 5.5V VDDIO Power-Supply Input
- Fast 400kHz I²C-Compatible, 2-Wire Serial Interface
- Pin-Selectable Power-On-Reset to Zero-Scale or Midscale DAC Output
- Active-Low LDAC and Active-Low CLR For Asynchronous DAC Control
- Three Software-Selectable Power-Down Output Impedances
- 1kΩ, 100kΩ, or High Impedance
