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| 型号： | AD7764BRUZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 19/33页 |
| 文件大小： | 0K |
| 描述： | IC ADC 24BIT S/D 312KSPS 28TSSOP |
| 标准包装： | 1,000 |
| 位数： | 24 |
| 采样率（每秒）： | 312k |
| 数据接口： | 串行，SPI? |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 371mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 1 个差分，单极；1 个差分，双极 |
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AD7764
Rev. A | Page 25 of 32
WRITING DATA IN DAISY-CHAIN MODE
Writing to AD7764 devices in daisy-chain mode is similar to
writing to a single device. The serial writing operation is syn-
chronous to the SCO signal. The status of the frame synchro-
nization input, FSI, is checked on the falling edge of the SCO
signal. If the
Writing data to the AD7764 in daisy-chain mode operates with
the same timing structure as writing to a single device (see
FSI line is low, then the first data bit on the serial
data in the SDI line is latched in on the next SCO falling edge.
Figure 3). The difference between writing to a single device and
writing to a number of daisy-chained devices is in the imple-
mentation of the FSI signal. The number of devices that are in
the daisy chain determines the period for which the FSI signal
must remain logic low. To write to n number of devices in the
daisy chain, the period between the falling edge of FSI and the
rising edge of FSI must be between 32 × (n 1) to 32 × n SCO
periods. For example, if three AD7764 devices are being written
to in daisy-chain mode, FSI
The AD7764 devices can be written to at any time. The falling
edge of
is logic low for between 32 × (3 1)
to 32 × 3 SCO pulses. This means that the rising edge of FSI
must occur between the 64th and 96th SCO periods.
FSI overrides all attempts to read data from the SDO
pin. In the case of a daisy chain, the FSI signal remaining logic
low for more than 32 SCO periods indicates to the AD7764
device that there are more devices further on in the chain. This
means that the AD7764 directs data that is input on the SDI pin
to its SDO pin. This ensures that data is passed to the next
device in the chain.
SYNC
SDI
FSI
SDO
MCLK
AD7764
(D)
FSI
SYNC
MCLK
SYNC
SDI
FSI
SDO
MCLK
AD7764
(C)
SYNC
SDI
FSI
SDO
MCLK
AD7764
(B)
SYNC
SDI
FSI
MCLK
AD7764
(A)
SDO
FSO
SCO
SDI
06518-
020
Figure 47. Writing to an AD7764 Daisy-Chain Configuration
FSI
SCO
SDI (D)
SDI (C) = SDO (D)
SDI (B) = SDO (C)
SDI (A) = SDO (B)
SDI (D)
SDI (C)
SDI (B)
SDI (A)
32 ×
tSCO
32 ×
tSCO
32 ×
tSCO
31 ×
tSCO
t10
06518-
021
Figure 48. Daisy-Chain Write Timing Diagram; Writing to Four AD7764 Devices
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相关代理商/技术参数 |
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|---|---|
| AD7765 | 制造商:AD 制造商全称:Analog Devices 功能描述:24-Bit, 8.5 mW, 109 dB, 128/64/32 kSPS ADCs |
| AD7765_07 | 制造商:AD 制造商全称:Analog Devices 功能描述:24-Bit, 156 kSPS, 112 dB ヒ-ツ ADC with On-Chip Buffers and Serial Interface |
| AD7765BRUZ | 功能描述:IC ADC 24BIT S/D 156KSPS 28TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 其它有关文件:TSA1204 View All Specifications 标准包装:1 系列:- 位数:12 采样率（每秒）:20M 数据接口:并联 转换器数目:2 功率耗散（最大）:155mW 电压电源:模拟和数字 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-TQFP 供应商设备封装:48-TQFP（7x7） 包装:Digi-Reel® 输入数目和类型:4 个单端，单极；2 个差分，单极 产品目录页面:1156 (CN2011-ZH PDF) 其它名称:497-5435-6 |
| AD7765BRUZ-REEL7 | 功能描述:IC ADC 24BIT S/D 156KSPS 28TSSOP RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 标准包装:1,000 系列:- 位数:12 采样率（每秒）:300k 数据接口:并联 转换器数目:1 功率耗散（最大）:75mW 电压电源:单电源 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-SOIC（0.295"，7.50mm 宽） 供应商设备封装:24-SOIC 包装:带卷 (TR) 输入数目和类型:1 个单端，单极；1 个单端，双极 |
| AD7766 | 制造商:AD 制造商全称:Analog Devices 功能描述:24-Bit, 8.5 mW, 109 dB, 128/64/32 kSPS ADCs |
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