ZHCSH59C August 2017 – January 2019 DAC60504 , DAC70504 , DAC80504
PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3 Feature Description
- 8.4 Device Functional Modes
- 8.5 Programming
- 8.6
Register Map
- 8.6.1 NOP Register (address = 0x00) [reset = 0x0000]
- 8.6.2 DEVICE ID Register (address = 0x01) [reset = 0x---]
- 8.6.3 SYNC Register (address = 0x2) [reset = 0xFF00]
- 8.6.4 CONFIG Register (address = 0x3) [reset = 0x0000]
- 8.6.5 GAIN Register (address = 0x04) [reset = 0x---]
- 8.6.6 TRIGGER Register (address = 0x05) [reset = 0x0000]
- 8.6.7 BRDCAST Register (address = 0x6) [reset = 0x0000]
- 8.6.8 STATUS Register (address = 0x7) [reset = 0x0000]
- 8.6.9 DACx Register (address = 0x8 to 0xF) [reset = 0x0000 or 0x8000]
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12器件和文档支持
- 13机械、封装和可订购信息
9.2.2 Detailed Design Procedure
The bipolar output span can be calculated through Equation 4 by defining a few parameters, the first being the value for the reference voltage. Once a reference voltage is chosen, the gain resistors can be set accordingly by determining the desired VOUT at code 0 and code 2n. For a VREF of 2.5 V and a desired output voltage range of ±10 V the calculation is as follows.
CODE = 0:
Setting the equation to minimum output span, VOUT(0) = –10 V, will reduce the equation to: R3/R1 = 4:
CODE = 4096:
Setting the equation to maximum output scan, VOUT(4096) = 10 V, and R3/R1 = 4 will reduce the equation to: R3/R2 = 3
It is important to note that the maximum code of a 12-bit DAC is 4095; code 4096 was used to simplify the equation above. For practical use, the true output span will encompass a range of –10 V to (10 V – 1 LSB), which in this case is –10 V to 9.995 V.