Analog Devices / Maxim Integrated MAX5715 四通道12位数模转换器
Maxim Integrated MAX5715 四通道、12位数模转换器（DAC）是功能丰富的器件，带有输出缓冲器和内部基准（可选为2.048V、2.500V或4.096V）。MAX5715 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。MAX5715 具有 50MHz 3线 SPI/QSPI™/MICROWIRE®/DSP兼容串行接口，也包括用于菊花链应用的低电平有效RDY输出。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，MAX5715将DAC输出复位至零，为驱动阀门或其它换能器等需要上电时处于关闭状态的应用提供安全保护。内部基准在开始时为关断状态，从而允许使用外部基准。MAX5715可利用软件LOAD命令或硬件加载DAC逻辑输入(低电平有效LDAC)同步更新输出。
The MAX5713/14/15 includes a 50MHz 3-wire SPI/QSPI™/MICROWIRE®/DSP-compatible serial interface that also includes an active-low RDY output for daisy-chain applications. The DAC output is buffered and has a low supply current of less than 250µA per channel and a low offset error of ±0.5mV (typ). On power-up, MAX5713/14/15 resets the DAC outputs to zero, providing additional safety for applications that drive valves or other transducers which need to be off on power-up. The internal reference is initially powered down to allow the use of an external reference. Analog Devices MAX5713/14/15 Quad-Channel, 12-Bit Digital-to-Analog Converters allow simultaneous output updates using software LOAD commands or the hardware load DAC logic input (active-low LDAC).
特性
- Four high-accuracy DAC channels
- 12-Bit accuracy without adjustment
- ±1 LSB INL buffered voltage output
- 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
- Small 5mm x 4.4mm 14-Pin TSSOP or ultra-small 1.6mm x 2.2mm 12-bump WLP package
- Wide 2.7V to 5.5V supply range
- Separate 1.8V to 5.5V VDDIO power-supply input
- 50MHz 3-Wire SPI/QSPI/MICROWIRE/DSP-compatible serial interface with active-low RDY output
- 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
应用
- Automatic tuning
- Communication systems
- Data acquisition
- Gain and offset adjustments
- Portable instrumentation
- Power amplifier controls
- Process control and servo loops
- Programmable voltage and current sources
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