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參數(shù)資料
| 型號： | AD7949BCPZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 25/32頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 14BIT 250KSPS 8CH 20LFCSP |
| 產(chǎn)品培訓(xùn)模塊： | Power Line Monitoring |
| 產(chǎn)品變化通告： | Startup Circuitry Design Improvement Change 15/April/2009 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | PulSAR® |
| 位數(shù)： | 14 |
| 采樣率（每秒）： | 250k |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 15.5mW |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-VFQFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 20-LFCSP-VQ |
| 包裝： | 托盤 |
| 輸入數(shù)目和類型： | * |
| 產(chǎn)品目錄頁面： | 780 (CN2011-ZH PDF) |
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Data Sheet
AD7949
Rev. D | Page 31 of 32
APPLICATION HINTS
LAYOUT
The printed circuit board (PCB) that houses the AD7949 should
be designed so that the analog and digital sections are separated
and confined to certain areas of the board. The pinout of the
AD7949, with all its analog signals on the left side and all its
digital signals on the right side, eases this task.
Avoid running digital lines under the device because these couple
noise onto the die unless a ground plane under the AD7949 is
used as a shield. Fast switching signals, such as CNV or clocks,
should not run near analog signal paths. Avoid crossover of
digital and analog signals.
At least one ground plane should be used. It can be common or
split between the digital and analog sections. In the latter case,
the planes should be joined underneath the AD7949.
The AD7949 voltage reference input REF has a dynamic input
impedance and should be decoupled with minimal parasitic
inductances. This is done by placing the reference decoupling
ceramic capacitor close to, ideally right up against, the REF and
GND pins and connecting them with wide, low impedance traces.
Finally, the power supplies VDD and VIO of the AD7949
should be decoupled with ceramic capacitors, typically 100 nF,
placed close to the AD7949, and connected using short, wide
traces to provide low impedance paths and to reduce the effect
of glitches on the power supply lines.
EVALUATING AD7949 PERFORMANCE
Other recommended layouts for the AD7949 are outlined in the
documentation of the evaluation board for the AD7949 (EVAL-
AD7949EDZ). The evaluation board package includes a fully
assembled and tested evaluation board, documentation, and
software for controlling the board from a PC via the converter and
evaluation development data capture board, EVAL-CED1Z.
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| AD7949BCPZ | 制造商:Analog Devices 功能描述:IC ADC 14BIT 250KSPS LFCSP-20 |
| AD7949BCPZRL7 | 功能描述:IC ADC 14BIT 250KSPS 8CH 20LFCSP 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):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個(gè)單端，單極 |
| AD7949SCPZ-EP-R2 | 功能描述:14 Bit Analog to Digital Converter 8 Input 1 SAR 20-LFCSP-WQ (4x4) 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):14 采樣率（每秒）:256k 輸入數(shù):8 輸入類型:差分，單端 數(shù)據(jù)接口:SPI，DSP 配置:MUX-ADC 無線電 - S/H:ADC:- A/D 轉(zhuǎn)換器數(shù):1 架構(gòu):SAR 參考類型:外部， 內(nèi)部 電壓 - 電源，模擬:2.3 V ~ 5.5 V 電壓 - 電源，數(shù)字:2.3 V ~ 5.5 V 特性:溫度傳感器 工作溫度:-55°C ~ 125°C 封裝/外殼:20-WFQFN 裸露焊盤，CSP 供應(yīng)商器件封裝:20-LFCSP-WQ（4x4） 標(biāo)準(zhǔn)包裝:1 |
| AD7949SCPZ-EP-RL7 | 制造商:Analog Devices 功能描述:ADC Single SAR 250ksps 14-bit Serial 20-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:8 CH 250KSPS 14BIT ADC IC - Tape and Reel 制造商:Analog Devices 功能描述:IC ADC 14BIT 8CH 250KSPS 20LFCSP 制造商:Analog Devices 功能描述:Analog to Digital Converters - ADC 14-Bit 8CH 250 kSPS 制造商:Analog Devices 功能描述:CONVERTER - ADC |
| AD795 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Power, Low Noise Precision FET Op Amp |
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