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參數(shù)資料
| 型號： | AD7988-5BCPZ-RL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 13/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 16BIT SRL 500KSPS 10LFCSP |
| 標(biāo)準(zhǔn)包裝： | 1,500 |
| 系列： | PulSAR® |
| 位數(shù)： | 16 |
| 采樣率（每秒）： | 500k |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-WFDFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 10-LFCSP-WD（3x3） |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 1 個偽差分，單極 |
AD7988-1/AD7988-5
Data Sheet
Rev. D | Page 20 of 24
CHAIN MODE
This mode can be used to daisy-chain multiple AD7988-x
devices on a 3-wire serial interface. This feature is useful for
reducing component count and wiring connections, for example,
in isolated multiconverter applications or for systems with a
limited interfacing capacity. Data readback is analogous to
clocking a shift register.
A connection diagram example using two AD7988-x devices is
shown in Figure 38, and the corresponding timing is given in
When SDI and CNV are low, SDO is driven low. With SCK low,
a rising edge on CNV initiates a conversion and selects the chain
mode. In this mode, CNV is held high during the conversion
phase and the subsequent data readback. When the conversion
is complete, the MSB is output onto SDO and the AD7988-x
enters the acquisition phase and powers down. The remaining
data bits stored in the internal shift register are clocked by
subsequent SCK falling edges. For each ADC, SDI feeds the
input of the internal shift register and is clocked by the SCK
falling edge. Each ADC in the chain outputs its data MSB first,
and 16 × N clocks are required to read back the N ADCs. The
data is valid on both SCK edges. Although the rising edge can
be used to capture the data, a digital host using the SCK falling
edge allows a faster reading rate and, consequently, more
AD7988-x devices in the chain, provided that the digital host
has an acceptable hold time. The maximum conversion rate
may be reduced due to the total readback time.
DIGITAL HOST
CONVERT
CLK
DATA IN
AD7988-1/
AD7988-5
SDO
CNV
A
SCK
AD7988-1/
AD7988-5
SDO
CNV
B
SCK
10231-
039
SDI
Figure 38. Chain Mode Connection Diagram
tCONV
tCYC
tSSDISCK
tSCKL
tSCK
tHSDISCK
tACQ
ACQUISITION
tSSCKCNV
ACQUISITION
tSCKH
CONVERSION
tHSCKCNV
SCK
CNV
SDOB
tEN
DA15
DA14
DA13
DB15
DB14
DB13
DB1
DB0
DA15
DA14
DA0
DA1
DA0
tHSDO
1
2
3
15
16
17
14
18
30
31
32
tDSDO
10231-
040
SDIA = 0
SDOA = SDIB
Figure 39. Chain Mode Serial Interface Timing
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| AD7988-5BRMZ | 功能描述:ADC 16BIT 500KSPS 1.25LSB 10MSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:PulSAR® 標(biāo)準(zhǔn)包裝:1 系列:microPOWER™ 位數(shù):8 采樣率（每秒）:1M 數(shù)據(jù)接口:串行，SPI? 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:- 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類型:8 個單端，單極 產(chǎn)品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| AD7988-5BRMZ-RL7 | 功能描述:IC ADC 16BIT SRL 500KSPS 10MSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:PulSAR® 標(biāo)準(zhǔn)包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個單端，單極；1 個單端，雙極 |
| AD7988-5CCPZ-RL | 功能描述:500KSPS, LOW POWER, 16 BIT USAR 制造商:analog devices inc. 系列:* 包裝:帶卷（TR） 零件狀態(tài):在售 封裝/外殼:10-WFDFN 裸露焊盤，CSP 供應(yīng)商器件封裝:10-LFCSP-WD（3x3） 標(biāo)準(zhǔn)包裝:5,000 |
| AD7988-5CCPZ-RL7 | 功能描述:500KSPS, LOW POWER, 16 BIT USAR 制造商:analog devices inc. 系列:* 包裝:剪切帶（CT） 零件狀態(tài):在售 封裝/外殼:10-WFDFN 裸露焊盤，CSP 供應(yīng)商器件封裝:10-LFCSP-WD（3x3） 標(biāo)準(zhǔn)包裝:1 |
| AD7989-1BCPZ-R2 | 功能描述:18 Bit Analog to Digital Converter 1 Input 1 SAR 10-LFCSP-WD (3x3) 制造商:analog devices inc. 系列:PulSAR? 包裝:剪切帶（CT） 零件狀態(tài):有效 位數(shù):18 采樣率（每秒）:100k 輸入數(shù):1 輸入類型:差分 數(shù)據(jù)接口:SPI，DSP 配置:S/H-ADC 無線電 - S/H:ADC:1:1 A/D 轉(zhuǎn)換器數(shù):1 架構(gòu):SAR 參考類型:外部 電壓 - 電源，模擬:2.375 V ~ 2.625 V 電壓 - 電源，數(shù)字:2.375 V ~ 2.625 V 特性:- 工作溫度:-40°C ~ 85°C 封裝/外殼:10-WFDFN 裸露焊盤，CSP 供應(yīng)商器件封裝:10-LFCSP-WD（3x3） 標(biāo)準(zhǔn)包裝:1 |
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