ZHCSDC6D November 2014 – February 2018 AMC7836
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
-
6 Specifications
- 6.1 Absolute Maximum Ratings
- 6.2 ESD Ratings
- 6.3 Recommended Operating Conditions
- 6.4 Thermal Information
- 6.5 Electrical Characteristics: DAC
- 6.6 Electrical Characteristics: ADC and Temperature Sensor
- 6.7 Electrical Characteristics: General
- 6.8 Timing Requirements
- 6.9 Typical Characteristics: DAC
- 6.10 Typical Characteristics: ADC
- 6.11 Typical Characteristics: Reference
- 6.12 Typical Characteristics: Temperature Sensor
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3 Feature Description
- 7.4 Device Functional Modes
- 7.5 Programming
- 7.6
Register Maps
- 7.6.1 Interface Configuration: Address 0x00 – 0x02
- 7.6.2
Device Identification: Address 0x03 – 0x0D
- 7.6.2.1 Chip Type Register (address = 0x03) [reset = 0x08]
- 7.6.2.2 Chip ID Low Byte Register (address = 0x04) [reset = 0x36]
- 7.6.2.3 Chip ID High Byte Register (address = 0x05) [reset = 0x0C]
- 7.6.2.4 Version ID Register (address = 0x06) [reset = 0x00]
- 7.6.2.5 Manufacturer ID Low Byte Register (address = 0x0C) [reset = 0x51]
- 7.6.2.6 Manufacturer ID High Byte Register (address = 0x0D) [reset = 0x04]
- 7.6.3 Register Update (Buffered Registers): Address 0x0F
- 7.6.4
General Device Configuration: Address 0x10 through 0x17
- 7.6.4.1 ADC Configuration Register (address = 0x10) [reset = 0x00]
- 7.6.4.2 False Alarm Configuration Register (address = 0x11) [reset = 0x70]
- 7.6.4.3 GPIO Configuration Register (address = 0x12) [reset = 0x00]
- 7.6.4.4 ADC MUX Configuration 0 Register (address = 0x13) [reset = 0x00]
- 7.6.4.5 ADC MUX Configuration 1 Register (address = 0x14) [reset = 0x00]
- 7.6.4.6 ADC MUX Configuration 2 Register (address = 0x15) [reset = 0x00]
- 7.6.4.7 DAC Clear Enable 0 Register (address = 0x18) [reset = 0x00]
- 7.6.4.8 DAC Clear Enable 1 Register (address = 0x19) [reset = 0x00]
- 7.6.5 DAC Clear and ALARMOUT Source Select: Address 0x1A through 0x1D
- 7.6.6 DAC Range: Address 0x1E
- 7.6.7
ADC and Temperature Data: Address 0x20 through 0x4B
- 7.6.7.1 ADCn-Data (Low Byte) Register (address = 0x20 through 0x49) [reset = 0x00]
- 7.6.7.2 ADCn-Data (High Byte) Register (address = 0x20 through 0x49) [reset = 0x00]
- 7.6.7.3 Temperature Data (Low Byte) Register (address = 0x4A) [reset = 0x00]
- 7.6.7.4 Temperature Data (High Byte) Register (address = 0x4B) [reset = 0x00]
- 7.6.8 DAC Data: Address 0x50 through 0x6F
- 7.6.9 Status Registers: Address 0x70 through 0x72
- 7.6.10 GPIO: Address 0x7A
- 7.6.11
Out-Of-Range ADC Thresholds: Address 0x80 through 0x93
- 7.6.11.1 ADCn-Upper-Thresh (Low Byte) Register (address = 0x80 through 0x93) [reset = 0xFF]
- 7.6.11.2 ADCn-Upper-Thresh (High Byte) Register (address = 0x80 through 0x93) [reset = 0x0F]
- 7.6.11.3 ADCn-Lower-Thresh (Low Byte) Register (address = 0x80 through 0x93) [reset = 0x00]
- 7.6.11.4 ADCn-Lower-Thresh (High Byte) Register (address = 0x80 through 0x93) [reset = 0x00]
- 7.6.11.5 LT-Upper-Thresh (Low Byte) Register (address = 0x94) [reset = 0xFF]
- 7.6.11.6 LT-Upper-Thresh (High Byte) Register (address = 0x95) [reset = 0x07]
- 7.6.11.7 LT-Lower-Thresh (Low Byte) Register (address = 0x96) [reset = 0x00]
- 7.6.11.8 LT-Lower-Thresh (High Byte) Register (address = 0x97) [reset = 0x08]
- 7.6.12 Alarm Hysteresis Configuration: Address 0xA0 and 0xA5
- 7.6.13
Clear and Power-Down Registers: Address 0xB0 through 0XB4
- 7.6.13.1 DAC Clear 0 Register (address = 0xB0) [reset = 0x00]
- 7.6.13.2 DAC Clear 1 Register (address = 0xB1) [reset = 0x00]
- 7.6.13.3 Power-Down 0 Register (address = 0xB2) [reset = 0x00]
- 7.6.13.4 Power-Down 1 Register (address = 0xB3) [reset = 0x00]
- 7.6.13.5 Power-Down 2 Register (address = 0xB4) [reset = 0x00]
- 7.6.14 ADC Trigger: Address 0xC0
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機械、封裝和可訂購信息
7.3.4 Internal Reference
The AMC7836 device includes a high-performance internal reference for the on-chip ADC and 16 DACs (see Figure 58). The internal reference is a 2.5 V, bipolar transistor-based, precision bandgap reference. A compensation capacitor (4.7 μF, typical) should be connected between the REF_CMP pin and the AGND2 pin.
The AMC7836 device includes a buffer to drive the ADC and should not be used to drive any external circuitry. The ADC reference buffer is powered down by default and should be enabled in the ADC configuration register (address 0x10) during device initialization.
Figure 58. AMC7836 Internal Reference
The internal reference is typically established after power-up in less than 5 ms at TA = 25°C however the reference settling time is highly dependent on temperature. Figure 59 shows typical reference settling time as a function of temperature.
Figure 59. Internal Reference Settling Time vs Temperature