ZHCSK88A September 2010 – September 2019 ADS7947 , ADS7948 , ADS7949
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
- 7.1 Absolute Maximum Ratings
- 7.2 ESD Ratings
- 7.3 Recommended Operating Conditions: ADS794x (12-, 10-, 8-Bit)
- 7.4 Thermal Information
- 7.5 Electrical Characteristics: ADS7947 (12-Bit)
- 7.6 Electrical Characteristics: ADS7948 (10-Bit)
- 7.7 Electrical Characteristics: ADS7949 (8-Bit)
- 7.8 Timing Requirements
- 7.9 Switching Characteristics
- 7.10 Typical Characteristics: ADS7947, ADS7948, ADS7949
- 7.11 Typical Characteristics: ADS7947 (12-Bit)
- 8 Detailed Description
- 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
8.3.4 ADC Transfer Function
The ADS7947 (12 bit), ADS7948 (10 bit), and ADS7949 (8 bit) devices are unipolar, pseudo-differential input devices. The ADC output is in straight binary format. Figure 43 shows ideal characteristics for this family of devices. Here, FSR is the full-scale range for the ADC input (AINxP – AINxN) and is equal to the reference input voltage to the ADC (VREF). 1 LSB is equal to (VREF / 2N) where N is the resolution of the ADC (for example, N = 12 for the ADS7947).
Figure 43. ADS7947, ADS7948, and ADS7949 Transfer Characteristics