20 位 DAC11001A、18 位 DAC91001 和 16 位 DAC81001 (DACx1001) 是高精度、低噪声、电压输出、单通道数模转换器 (DAC)。DACx1001 根据设计具有单调性,可以在所有范围内提供低于 4LSB(最大值)的出色线性度。
非缓冲电压输出可提供低噪声性能 (7nV/√Hz) 和快速稳定时间 (1µs),因此这款器件非常适合低噪声、快速控制环路和波形生成 应用中的数字输入 D 类音频放大器。DACx1001 兼具增强型抗尖峰脉冲电路以及独立于代码的超低干扰 (1nV-s),可实现干净的波形斜升和超低总谐波失真 (THD)。
DACx1001 器件包含上电复位电路,因此 DAC 能够使用寄存器中的已知值供电。使用外部基准,可以实现 VREFPF 到 VREFNF 的 DAC 输出,包括非对称输出范围。
DACx1001 使用一个在高达 50MHz 的时钟频率下运行的通用 4 线串行接口。DACx1001 的额定工业工作温度范围为 -40°C 至 +125°C。
器件型号 | 封装 | 封装尺寸(标称值) |
---|---|---|
DAC11001 | TQFP (48) | 7.00mm × 7.00mm |
DAC91001(预发布) | ||
DAC81001(预发布) |
Changes from * Revision (October 2019) to A Revision
DEVICE | RESOLUTION |
---|---|
DAC11001A | 20-bit |
DAC91001 (preview) | 18-bit |
DAC81001 (preview) | 16-bit |
PIN | TYPE | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
AGND | 2, 35, 38, 40, 42, 43, 46, 47 | Analog ground | Connect to 0 V. |
AGND-OUT | 8 | Analog ground | Connect to 0 V. Measure DAC output voltage with respect to this node. |
AGND-TnH | 14 | Analog ground | Connect to 0 V. Integrated deglitcher clock ground.. |
ALARM | 19 | Output | Alarm output |
AVDD | 39, 41 | Power | Positive low voltage analog power supply |
CLR | 30 | Input | DAC registers clear pin, active low |
DGND | 16, 17, 20, 21, 22, 23, 26 | Digital ground | Connect to 0 V. |
DVDD | 27 | Power | Digital power supply pin |
RFB | 9 | Input | Integrated precision resistor feedback node |
IOVDD | 28 | Power | Interface power supply pin |
LDAC | 18 | Input | Load DAC pin, active low |
NC | 1, 12, 13, 15, 24, 25, 29, 36, 37, 48 | — | No connection, leave floating |
OUT | 7 | Output | Unbuffered voltage output |
RCM | 11 | Input | Integrated precision resistor common-mode node |
REFNF | 5 | Input | External negative reference input. Connect to 0 V for unipolar DAC output. |
REFNS | 6 | Input | External negative reference sense node |
REFPF | 3 | Input | External positive reference input |
REFPS | 4 | Input | External positive reference sense node |
ROFS | 10 | Input | Integrated precision resistor offset node |
SCLK | 31 | Input | Serial clock input of serial peripheral interface (SPI). Schmitt-trigger logic input.
Data are transferred at rates of up to 50 MHz. |
SDIN | 32 | Input | Serial data input. Schmitt-trigger logic input.
Data are clocked into the input shift register on the falling edge of the serial clock input. |
SDO | 34 | Output | Serial data output. Data are valid on the falling edge of SCLK. |
SYNC | 33 | Input | SPI bus chip select input (active low). Data bits are not clocked into the serial shift register unless SYNC is low. When SYNC is high, the SDO pin is in high-impedance status. |
VCC | 45 | Power | Analog positive power supply |
VSS | 44 | Power | Analog negative power supply |
MIN | MAX | UNIT | |||
---|---|---|---|---|---|
Positive supply voltage | AVDD to AGND | –0.3 | 7 | V | |
VCC to VSS | –0.3 | 40 | |||
VCC to AGND | –0.3 | 40 | |||
Negative supply voltage | VSS to AGND | –19 | 0.3 | V | |
Positive reference voltage | VREFPF to VREFNF | –0.3 | 40 | V | |
VREFPF to VCC | –0.3 | VCC + 0.3 | |||
VREFPF to AGND | –0.3 | 40 | |||
Negative reference voltage | VREFNF to AGND | –19 | 0.3 | V | |
VREFNF to VSS | VSS – 0.3 | 0.3 | |||
Digital and IO power supply | DVDD, IOVDD to DGND | –0.3 | 7 | V | |
Digital input(s) to DGND | DGND – 0.3 | IOVDD + 0.3 | V | ||
VOUT, VRFB, VRCM, VROFS | to AGND (VSS = AGND) | VSS | VCC | V | |
to VSS | 0 | VCC | |||
Alarm pin voltage, ALARM to DGND | –0.3 | DVDD + 0.3 | V | ||
Digital output, SDO to DGND | –0.3 | DVDD + 0.3 | V | ||
Current into any pin | –10 | 10 | mA | ||
TJ | Junction temperature | 150 | °C | ||
Tstg | Storage temperature | –65 | 150 | °C |