Analog Devices / Maxim Integrated MAX5815 12位缓冲输出数模转换器

Maxim Integrated MAX5815 12位、4通道缓冲输出数模转换器 (DAC)带有一个内部基准(可选择为2.048V、2.500V或4.096V)。Maxim Integrated MAX5815 DAC可承受2.7V至5.5V的宽幅电源电压范围，具有超低功耗(3mW)，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。MAX5815 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。MAX5815 DAC 特别适用于可编程电压及电流源、增益与失调调节等多种应用场合。

特性

Four 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
Power-on-reset to zero-scale DAC output
Active-low LDAC and active-low CLR for asynchronous control
Three software-selectable power-down output impedances
- 1kΩ, 100kΩ, or high impedance