ZHCSHD7A January 2018 – April 2020 ADC12DJ2700
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: DC Specifications
- 6.6 Electrical Characteristics: Power Consumption
- 6.7 Electrical Characteristics: AC Specifications (Dual-Channel Mode)
- 6.8 Electrical Characteristics: AC Specifications (Single-Channel Mode)
- 6.9 Timing Requirements
- 6.10 Switching Characteristics
- 6.11 Typical Characteristics
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 Device Comparison
- 7.3.2 Analog Inputs
- 7.3.3 ADC Core
- 7.3.4 Temperature Monitoring Diode
- 7.3.5 Timestamp
- 7.3.6 Clocking
- 7.3.7 Digital Down Converters (Dual-Channel Mode Only)
- 7.3.8 JESD204B Interface
- 7.3.9 Alarm Monitoring
- 7.4
Device Functional Modes
- 7.4.1 Dual-Channel Mode
- 7.4.2 Single-Channel Mode (DES Mode)
- 7.4.3 JESD204B Modes
- 7.4.4 Power-Down Modes
- 7.4.5 Test Modes
- 7.4.6 Calibration Modes and Trimming
- 7.4.7 Offset Calibration
- 7.4.8 Trimming
- 7.4.9 Offset Filtering
- 7.5 Programming
- 7.6
Register Maps
- 7.6.1 Memory Map
- 7.6.2
Register Descriptions
- 7.6.2.1
Standard SPI-3.0 (0x000 to 0x00F)
- Table 46. Standard SPI-3.0 Registers
- 7.6.2.1.1 Configuration A Register (address = 0x000) [reset = 0x30]
- 7.6.2.1.2 Device Configuration Register (address = 0x002) [reset = 0x00]
- 7.6.2.1.3 Chip Type Register (address = 0x003) [reset = 0x03]
- 7.6.2.1.4 Chip ID Register (address = 0x004 to 0x005) [reset = 0x0020]
- 7.6.2.1.5 Chip Version Register (address = 0x006) [reset = 0x01]
- 7.6.2.1.6 Vendor Identification Register (address = 0x00C to 0x00D) [reset = 0x0451]
- 7.6.2.2 User SPI Configuration (0x010 to 0x01F)
- 7.6.2.3
Miscellaneous Analog Registers (0x020 to 0x047)
- 7.6.2.3.1 Clock Control Register 0 (address = 0x029) [reset = 0x00]
- 7.6.2.3.2 Clock Control Register 1 (address = 0x02A) [reset = 0x00]
- 7.6.2.3.3 SYSREF Capture Position Register (address = 0x02C-0x02E) [reset = Undefined]
- 7.6.2.3.4 INA Full-Scale Range Adjust Register (address = 0x030-0x031) [reset = 0xA000]
- 7.6.2.3.5 INB Full-Scale Range Adjust Register (address = 0x032-0x033) [reset = 0xA000]
- 7.6.2.3.6 Internal Reference Bypass Register (address = 0x038) [reset = 0x00]
- 7.6.2.3.7 TMSTP± Control Register (address = 0x03B) [reset = 0x00]
- 7.6.2.4 Serializer Registers (0x048 to 0x05F)
- 7.6.2.5
Calibration Registers (0x060 to 0x0FF)
- 7.6.2.5.1 Input Mux Control Register (address = 0x060) [reset = 0x01]
- 7.6.2.5.2 Calibration Enable Register (address = 0x061) [reset = 0x01]
- 7.6.2.5.3 Calibration Configuration 0 Register (address = 0x062) [reset = 0x01]
- 7.6.2.5.4 Calibration Status Register (address = 0x06A) [reset = Undefined]
- 7.6.2.5.5 Calibration Pin Configuration Register (address = 0x06B) [reset = 0x00]
- 7.6.2.5.6 Calibration Software Trigger Register (address = 0x06C) [reset = 0x01]
- 7.6.2.5.7 Low-Power Background Calibration Register (address = 0x06E) [reset = 0x88]
- 7.6.2.5.8 Calibration Data Enable Register (address = 0x070) [reset = 0x00]
- 7.6.2.5.9 Calibration Data Register (address = 0x071) [reset = Undefined]
- 7.6.2.5.10 Channel A Gain Trim Register (address = 0x07A) [reset = Undefined]
- 7.6.2.5.11 Channel B Gain Trim Register (address = 0x07B) [reset = Undefined]
- 7.6.2.5.12 Band-Gap Reference Trim Register (address = 0x07C) [reset = Undefined]
- 7.6.2.5.13 VINA Input Resistor Trim Register (address = 0x07E) [reset = Undefined]
- 7.6.2.5.14 VINB Input Resistor Trim Register (address = 0x07F) [reset = Undefined]
- 7.6.2.5.15 Timing Adjust for A-ADC, Single-Channel Mode, Foreground Calibration Register (address = 0x080) [reset = Undefined]
- 7.6.2.5.16 Timing Adjust for B-ADC, Single-Channel Mode, Foreground Calibration Register (address = 0x081) [reset = Undefined]
- 7.6.2.5.17 Timing Adjust for A-ADC, Single-Channel Mode, Background Calibration Register (address = 0x082) [reset = Undefined]
- 7.6.2.5.18 Timing Adjust for C-ADC, Single-Channel Mode, Background Calibration Register (address = 0x083) [reset = Undefined]
- 7.6.2.5.19 Timing Adjust for C-ADC, Single-Channel Mode, Background Calibration Register (address = 0x084) [reset = Undefined]
- 7.6.2.5.20 Timing Adjust for B-ADC, Single-Channel Mode, Background Calibration Register (address = 0x085) [reset = Undefined]
- 7.6.2.5.21 Timing Adjust for A-ADC, Dual-Channel Mode Register (address = 0x086) [reset = Undefined]
- 7.6.2.5.22 Timing Adjust for C-ADC Acting for A-ADC, Dual-Channel Mode Register (address = 0x087) [reset = Undefined]
- 7.6.2.5.23 Timing Adjust for C-ADC Acting for B-ADC, Dual-Channel Mode Register (address = 0x088) [reset = Undefined]
- 7.6.2.5.24 Timing Adjust for B-ADC, Dual-Channel Mode Register (address = 0x089) [reset = Undefined]
- 7.6.2.5.25 Offset Adjustment for A-ADC and INA Register (address = 0x08A-0x08B) [reset = Undefined]
- 7.6.2.5.26 Offset Adjustment for A-ADC and INB Register (address = 0x08C-0x08D) [reset = Undefined]
- 7.6.2.5.27 Offset Adjustment for C-ADC and INA Register (address = 0x08E-0x08F) [reset = Undefined]
- 7.6.2.5.28 Offset Adjustment for C-ADC and INB Register (address = 0x090-0x091) [reset = Undefined]
- 7.6.2.5.29 Offset Adjustment for B-ADC and INA Register (address = 0x092-0x093) [reset = Undefined]
- 7.6.2.5.30 Offset Adjustment for B-ADC and INB Register (address = 0x094-0x095) [reset = Undefined]
- 7.6.2.5.31 Offset Filtering Control 0 Register (address = 0x097) [reset = 0x00]
- 7.6.2.5.32 Offset Filtering Control 1 Register (address = 0x098) [reset = 0x33]
- 7.6.2.6
ADC Bank Registers (0x100 to 0x15F)
- 7.6.2.6.1 Timing Adjustment for Bank 0 (0° Clock) Register (address = 0x102) [reset = Undefined]
- 7.6.2.6.2 Timing Adjustment for Bank 0 (–90° Clock) Register (address = 0x103) [reset = Undefined]
- 7.6.2.6.3 Timing Adjustment for Bank 1 (0° Clock) Register (address = 0x112) [reset = Undefined]
- 7.6.2.6.4 Timing Adjustment for Bank 1 (–90° Clock) Register (address = 0x113) [reset = Undefined]
- 7.6.2.6.5 Timing Adjustment for Bank 2 (0° Clock) Register (address = 0x122) [reset = Undefined]
- 7.6.2.6.6 Timing Adjustment for Bank 2 (–90° Clock) Register (address = 0x123) [reset = Undefined]
- 7.6.2.6.7 Timing Adjustment for Bank 3 (0° Clock) Register (address = 0x132) [reset = Undefined]
- 7.6.2.6.8 Timing Adjustment for Bank 3 (–90° Clock) Register (address = 0x133) [reset = Undefined]
- 7.6.2.6.9 Timing Adjustment for Bank 4 (0° Clock) Register (address = 0x142) [reset = Undefined]
- 7.6.2.6.10 Timing Adjustment for Bank 4 (–90° Clock) Register (address = 0x143) [reset = Undefined]
- 7.6.2.6.11 Timing Adjustment for Bank 5 (0° Clock) Register (address = 0x152) [reset = Undefined]
- 7.6.2.6.12 Timing Adjustment for Bank 5 (–90° Clock) Register (address = 0x153) [reset = Undefined]
- 7.6.2.7 LSB Control Registers (0x160 to 0x1FF)
- 7.6.2.8
JESD204B Registers (0x200 to 0x20F)
- 7.6.2.8.1 JESD204B Enable Register (address = 0x200) [reset = 0x01]
- 7.6.2.8.2 JESD204B Mode Register (address = 0x201) [reset = 0x02]
- 7.6.2.8.3 JESD204B K Parameter Register (address = 0x202) [reset = 0x1F]
- 7.6.2.8.4 JESD204B Manual SYNC Request Register (address = 0x203) [reset = 0x01]
- 7.6.2.8.5 JESD204B Control Register (address = 0x204) [reset = 0x02]
- 7.6.2.8.6 JESD204B Test Pattern Control Register (address = 0x205) [reset = 0x00]
- 7.6.2.8.7 JESD204B DID Parameter Register (address = 0x206) [reset = 0x00]
- 7.6.2.8.8 JESD204B Frame Character Register (address = 0x207) [reset = 0x00]
- 7.6.2.8.9 JESD204B, System Status Register (address = 0x208) [reset = Undefined]
- 7.6.2.8.10 JESD204B Channel Power-Down Register (address = 0x209) [reset = 0x00]
- 7.6.2.8.11 JESD204B Extra Lane Enable (Link A) Register (address = 0x20A) [reset = 0x00]
- 7.6.2.8.12 JESD204B Extra Lane Enable (Link B) Register (address = 0x20B) [reset = 0x00]
- 7.6.2.9
Digital Down Converter Registers (0x210-0x2AF)
- 7.6.2.9.1 DDC Configuration Register (address = 0x210) [reset = 0x00]
- 7.6.2.9.2 Overrange Threshold 0 Register (address = 0x211) [reset = 0xF2]
- 7.6.2.9.3 Overrange Threshold 1 Register (address = 0x212) [reset = 0xAB]
- 7.6.2.9.4 Overrange Configuration Register (address = 0x213) [reset = 0x07]
- 7.6.2.9.5 DDC Configuration Preset Mode Register (address = 0x214) [reset = 0x00]
- 7.6.2.9.6 DDC Configuration Preset Select Register (address = 0x215) [reset = 0x00]
- 7.6.2.9.7 Digital Channel Binding Register (address = 0x216) [reset = 0x02]
- 7.6.2.9.8 Rational NCO Reference Divisor Register (address = 0x217 to 0x218) [reset = 0x0000]
- 7.6.2.9.9 NCO Synchronization Register (address = 0x219) [reset = 0x02]
- 7.6.2.9.10 NCO Frequency (DDC A or DDC B and Preset x) Register (address = see ) [reset = see ]
- 7.6.2.9.11 NCO Phase (DDC A or DDC B and Preset x) Register (address = see ) [reset = see ]
- 7.6.2.10 Spin Identification Register (address = 0x297) [reset = Undefined]
- 7.6.2.1
Standard SPI-3.0 (0x000 to 0x00F)
- 7.6.3
SYSREF Calibration Registers (0x2B0 to 0x2BF)
- 7.6.3.1 SYSREF Calibration Enable Register (address = 0x2B0) [reset = 0x00]
- 7.6.3.2 SYSREF Calibration Configuration Register (address = 0x2B1) [reset = 0x05]
- 7.6.3.3 SYSREF Calibration Status Register (address = 0x2B2 to 0x2B4) [reset = Undefined]
- 7.6.3.4 DEVCLK Aperture Delay Adjustment Register (address = 0x2B5 to 0x2B7) [reset = 0x000000]
- 7.6.3.5 DEVCLK Timing Adjust Ramp Control Register (address = 0x2B8) [reset = 0x00]
- 7.6.4 Alarm Registers (0x2C0 to 0x2C2)
- 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
7.3.6 Clocking
The clocking subsystem of the ADC12DJ2700 has two input signals, device clock (CLK+, CLK–) and SYSREF (SYSREF+, SYSREF–). Within the clocking subsystem there is a noiseless aperture delay adjustment (tAD adjust), a clock duty cycle corrector, and a SYSREF capture block. Figure 65 describes the clocking subsystem.
Figure 65. ADC12DJ2700 Clocking Subsystem The device clock is used as the sampling clock for the ADC core as well as the clocking for the digital processing and serializer outputs. Use a low-noise (low jitter) device clock to maintain high signal-to-noise ratio (SNR) within the ADC. In dual-channel mode, the analog input signal for each input is sampled on the rising edge of the device clock. In single-channel mode, both the rising and falling edges of the device clock are used to capture the analog signal to reduce the maximum clock rate required by the ADC. A noiseless aperture delay adjustment (tAD adjust) allows the user to shift the sampling instance of the ADC in fine steps in order to synchronize multiple ADC12DJ2700s or to fine-tune system latency. Duty cycle correction is implemented in the ADC12DJ2700 to ease the requirements on the external device clock while maintaining high performance. Table 5 summarizes the device clock interface in dual-channel mode and single-channel mode.
Table 5. Device Clock vs Mode of Operation
| MODE OF OPERATION | SAMPLING RATE VS fCLK | SAMPLING INSTANT |
|---|---|---|
| Dual-channel mode | 1 × fCLK | Rising edge |
| Single-channel mode | 2 × fCLK | Rising and falling edge |
SYSREF is a system timing reference used for JESD204B subclass-1 implementations of deterministic latency. SYSREF is used to achieve deterministic latency and for multi-device synchronization. SYSREF must be captured by the correct device clock edge in order to achieve repeatable latency and synchronization. The ADC12DJ2700 includes SYSREF windowing and automatic SYSREF calibration to ease the requirements on the external clocking circuits and to simplify the synchronization process. SYSREF can be implemented as a single pulse or as a periodic clock. In periodic implementations, SYSREF must be equal to, or an integer division of, the local multiframe clock frequency. Equation 2 is used to calculate valid SYSREF frequencies.
