AD5666: 四通道、16位DAC，内置最大10 ppm/°C片内基准电压源，采用14引脚TSSOP封装
AD5666是一款低功耗、四通道、16位缓冲电压输出数模转换器(DAC)，采用+2.7 V至+5.5 V单电源供电，通过设计保证单调性。这款器件内置一个片内基准电压源，内部增益为2。AD5666-1内置一个1.25 V、最大10 ppm/°C基准电压源，AD5666-2内置一个2.5 V、最大10ppm/°C基准电压源。上电时，片内基准电压源关闭，因而可以用外部基准电压。对DAC执行写操作将打开内部基准电压源。该器件内置一个上电复位电路，确保DAC输出上电至0 V（POR引脚低电平）或中间电平（POR引脚高电平），并保持该电平，直到执行一次有效的写操作为止。此外还具有各通道独立省电特性，在省电模式下，器件在5 V时的功耗降至200 nA，并提供软件可选输出负载。利用LDAC功能可以同时更新所有DAC的输出，此外也可以通过软件选择任意数量的DAC通道进行同步。另外还有一个异步低电平有效CLR功能，可以将所有DAC清零至软件可选码：0 V、中间电平或满量程。AD5666采用多功能三线式串行接口，能够以最高50 MHz的时钟速率工作，并与标准SPI™、QSPI™、MICROWIRE™、DSP接口标准兼容。它内置片内精密输出放大器，能够实现轨到轨输出摆幅。
The AD5666 is a low power, quad, 16-bit, buffered voltage-output DAC. The part operates from a single 2.7 V to 5.5 V supply and is guaranteed monotonic by design.The AD5666 has an on-chip reference with an internal gain of 2. The AD5666-1 has a 1.25 V 5 ppm/°C reference, giving a full-scale output of 2.5 V; the AD5666-2 has a 2.5 V 5 ppm/°C reference, giving a full-scale output of 5 V. The on-board reference is off at power-up, allowing the use of an external reference. The internal reference is turned on by writing to the DAC.The part incorporates a power-on reset circuit that ensures that the DAC output powers up to 0 V (POR pin low) or to midscale (POR pin high) and remains powered up at this level until a valid write takes place. The part contains a power-down feature that reduces the current consumption of the device to 400 nA at 5 V and provides software-selectable output loads while in power-down mode for any or all DAC channels.The outputs of all DACs can be updated simultaneously using the LDAC function, with the added functionality of user-select-able DAC channels to simultaneously update. There is also an asynchronous CLR that clears all DACs to a software-selectable code-0 V, midscale, or full scale.The AD5666 utilizes a versatile 3-wire serial interface that operates at clock rates of up to 50 MHz and is compatible with standard SPI®, QSPI™, MICROWIRE™, and DSP interface standards. The on-chip precision output amplifier enables rail-to-rail output swing.
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订购指南
| 产品型号 | 封装 | 引脚 | 温度范围 | 包装和数量 | 报价*(100-499) | 报价*1000 pcs |
|---|---|---|---|---|---|---|
| AD5666ARUZ-2 产品状态: 量产 | 14 ld TSSOP | 14 | 工业 | Tube, 96 | $ 8.83 | $ 7.51 |
| AD5666ARUZ-2REEL7 产品状态: 量产 | 14 ld TSSOP | 14 | 工业 | Reel, 1000 | - | $ 7.51 |
| AD5666BRUZ-1 产品状态: 量产 | 14 ld TSSOP | 14 | 工业 | Tube, 96 | $ 10.16 | $ 8.64 |
| AD5666BRUZ-1REEL7 产品状态: 量产 | 14 ld TSSOP | 14 | 工业 | Reel, 1000 | - | $ 8.64 |
| AD5666BRUZ-2 产品状态: 量产 | 14 ld TSSOP | 14 | 工业 | Tube, 96 | $ 10.16 | $ 8.64 |
| AD5666BRUZ-2REEL7 产品状态: 量产 | 14 ld TSSOP | 14 | 工业 | Reel, 1000 | - | $ 8.64 |
| AD5666SRU-EP-2RL7 产品状态: 量产 | 14 ld TSSOP | 14 | 工业 | Reel, 1000 | - | $ 13.82 |
