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| 型号： | EVAL-AD7715-3EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 25/40页 |
| 文件大小： | 0K |
| 描述： | BOARD EVALUATION FOR AD7715 |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 16 |
| 采样率（每秒）： | 500 |
| 数据接口： | 串行 |
| 输入范围： | ±VREF/增益 |
| 在以下条件下的电源（标准）： | 5.3mW @ 3.3 V |
| 工作温度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD7715-3 |
| 已供物品： | 板，CD |
| 相关产品： | AD7715ARUZ-5-ND - IC ADC 16BIT SIGMA-DELTA 16TSSOP AD7715ARUZ-3-ND - IC ADC 16BIT SIGMA-DELTA 16TSSOP AD7715ANZ-3-ND - IC ADC 16BIT SIGMA-DELTA 16DIP AD7715ARUZ-5REEL7-ND - IC ADC 16BIT SIGMA-DELTA 16TSSOP AD7715ARUZ-3REEL7-ND - IC ADC 16BIT SIGMA-DELTA 16TSSOP AD7715ARZ-3REEL-ND - IC ADC 16BIT SIGMA-DELTA 16SOIC AD7715ARZ-3-ND - IC ADC 16BIT 3V 16-SOIC AD7715ANZ-5-ND - IC ADC 16BIT 5V 16-DIP AD7715ARZ-5REEL-ND - IC ADC 16BIT 5V 16-SOIC AD7715ARZ-5-ND - IC ADC 16BIT SIGMA-DELTA 16-SOIC 更多... |
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AD7715
Rev. D | Page 31 of 40
CONFIGURING THE AD7715
The AD7715 contains three on-chip registers which the user
accesses via the serial interface. Communication with any of
these registers is initiated by writing to the communications
register first. Figure 10 outlines a flow chart of the sequence
which is used to configure all registers after a power-up or reset.
The flowchart also shows two different read options—the first
where the DRDY pin is polled to determine when an update of
the data register has taken place, the second where the DRDY
bit of the communications register is interrogated to see if a
data register update has taken place. Also included in the
flowing diagram is a series of words which should be written
to the registers for a particular set of operating conditions.
These conditions are gain of 1, no filter sync, bipolar mode,
buffer off, clock of 2.4576 MHz, and an output rate of 60 Hz.
START
CONFIGURE AND INITIALIZE
MICROCONTROLLER/MICROPROCESSOR SERIAL PORT
POWER-ON/RESET FOR AD7715
WRITE TO COMMUNICATIONS REGISTER SETTING UP
GAIN AND SETTING UP NEXT OPERATION TO BE A
WRITE TO THE SETUP REGISTER (10 HEX)
WRITE TO SETUP REGISTER SETTING UP REQUIRED
VALUES AND INITIATING A SELF CALIBRATION (68 HEX)
POLL DRDY PIN
DRDY
LOW?
YES
NO
WRITE TO COMMUNICATIONS REGISTER SETTING UP
SAME GAIN AND SETTING UP NEXT OPERATION TO
BE A READ FROM THE DATA REGISTER (38 HEX)
READ FROM DATA REGISTER
POLL DRDY BIT OF COMMUNICATIONS REGISTER
YES
NO
WRITE TO COMMUNICATIONS REGISTER SETTING UP
SAME GAIN AND SETTING UP NEXT OPERATION TO BE
A READ FROM THE DATA REGISTER (38 HEX)
WRITE TO COMMUNICATIONS REGISTER SETTING UP SAME
GAIN AND SETTING UP NEXT OPERATION TO BE A READ FROM
THE COMMUNICATIONS REGISTER (08 HEX)
READ FROM COMMUNICATIONS REGISTER
READ FROM DATA REGISTER
DRDY
LOW?
08
51
9-
0
10
Figure 10. Flow Chart for Setting Up and Reading from the AD7715
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相关代理商/技术参数 |
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| EVAL-AD7715-3EBZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:3 V/5 V, 450 ??A 16-Bit, Sigma-Delta ADC |
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