- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄10174 > AD7688BRMZRL7 (Analog Devices Inc)IC ADC 16BIT 500KSPS 10MSOP PDF資料下載
參數(shù)資料
| 型號(hào)： | AD7688BRMZRL7 |
| 廠(chǎng)商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 6/28頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 16BIT 500KSPS 10MSOP |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 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 |
| 功率耗散（最大）： | 21.5mW |
| 電壓電源： | 模擬和數(shù)字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 10-MSOP |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類(lèi)型： | 2 個(gè)單端，單極；2 個(gè)單端，雙極；1 個(gè)差分，單極；1 個(gè)差分，雙極 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)當(dāng)前第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)
AD7688
Rev. A | Page 14 of 28
ANALOG INPUT
Figure 27 shows an equivalent circuit of the input structure of
the AD7688.
The two diodes, D1 and D2, provide ESD protection for the
analog inputs IN+ and IN. Care must be taken to ensure that
the analog input signal never exceeds the supply rails by more
than 0.3 V because this causes these diodes to begin to forward-
bias and start conducting current. These diodes can handle a
forward-biased current of 130 mA maximum. For instance,
these conditions could eventually occur when the input buffer’s
(U1) supplies are different from VDD. In such a case, an input
buffer with a short-circuit current limitation can be used to
protect the part.
CIN
RIN
D1
D2
CPIN
IN+
OR IN–
GND
VDD
02973-026
Figure 27. Equivalent Analog Input Circuit
The analog input structure allows the sampling of the true
differential signal between IN+ and IN. By using these
differential inputs, signals common to both inputs are rejected,
as shown in Figure 28, which represents the typical CMRR over
frequency.
02973-
027
FREQUENCY (kHz)
10000
1
10
100
1000
CMRR
(
d
B)
80
70
60
VDD = 5V
Figure 28. Analog Input CMRR vs. Frequency
During the acquisition phase, the impedance of the analog
inputs (IN+ or IN) can be modeled as a parallel combination
of capacitor, CPIN, and the network formed by the series
connection of RIN and CIN. CPIN is primarily the pin capacitance.
RIN is typically 600 Ω and is a lumped component made up of
some serial resistors and the on resistance of the switches. CIN is
typically 30 pF and is mainly the ADC sampling capacitor.
During the conversion phase, where the switches are opened,
the input impedance is limited to CPIN. RIN and CIN make a
1-pole, low-pass filter that reduces undesirable aliasing effects
and limits the noise.
When the source impedance of the driving circuit is low, the
AD7688 can be driven directly. Large source impedances
significantly affect the ac performance, especially total
harmonic distortion (THD). The dc performances are less
sensitive to the input impedance. The maximum source
impedance depends on the amount of THD that can be
tolerated. The THD degrades as a function of the source
impedance and the maximum input frequency, as shown in
FREQUENCY (kHz)
THD
(dB)
–60
–70
–80
–90
–100
–110
–120
0
25
50
75
100
02973-
028
RS = 250Ω
RS = 100Ω
RS = 50Ω
RS = 33Ω
Figure 29. THD vs. Analog Input Frequency and Source Resistance
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC1690CS8#TR | IC TXRX DIFF FAILSAFE LP 8SOIC |
| VE-BTN-MY | CONVERTER MOD DC/DC 18.5V 50W |
| 24282-31PG-3ES | CONN RCPT 31POS PNL MNT PIN |
| ADM207EARUZ-REEL7 | IC TXRX RS232 5DVR/3REC 24TSSOP |
| CXC3106A282S | CONN PLUG 14POS STRGHT SKT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7689 | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:14-Bit, 8-Channel, 250 kSPS PulSAR ADC |
| AD7689ACPZ | 功能描述:IC ADC 16BIT 250KSPS 8CH 20LFCSP RoHS:是 類(lèi)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(lèi)型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤(pán)（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類(lèi)型:8 個(gè)單端，單極 產(chǎn)品目錄頁(yè)面:892 (CN2011-ZH PDF) 其它名稱(chēng):296-25851-6 |
| AD7689ACPZRL7 | 功能描述:IC ADC 16BIT 250KSPS 8CH 20LFCSP RoHS:是 類(lèi)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(lèi)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(lèi)型:2 個(gè)單端，單極 |
| AD7689BCBZ-RL7 | 功能描述:16 Bit Analog to Digital Converter 8 Input 1 SAR 20-WLCSP (2.39x2.39) 制造商:analog devices inc. 系列:- 包裝:剪切帶（CT） 零件狀態(tài):有效 位數(shù):16 采樣率（每秒）:250k 輸入數(shù):8 輸入類(lèi)型:差分，個(gè)偽差分，單端 數(shù)據(jù)接口:SPI，DSP 配置:MUX-S/H-ADC 無(wú)線(xiàn)電 - S/H:ADC:1:1 A/D 轉(zhuǎn)換器數(shù):1 架構(gòu):SAR 參考類(lèi)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:1.8 V ~ 5.5 V 特性:溫度傳感器 工作溫度:-40°C ~ 85°C 封裝/外殼:20-UFBGA，WLCSP 供應(yīng)商器件封裝:20-WLCSP（2.39x2.39） 標(biāo)準(zhǔn)包裝:1 |
| AD7689BCPZ | 功能描述:IC ADC 16BIT 250KSPS 8CH 20LFCSP RoHS:是 類(lèi)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(lèi)型:表面貼裝 封裝/外殼:24-VFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:24-VQFN 裸露焊盤(pán)（4x4） 包裝:Digi-Reel® 輸入數(shù)目和類(lèi)型:8 個(gè)單端，單極 產(chǎn)品目錄頁(yè)面:892 (CN2011-ZH PDF) 其它名稱(chēng):296-25851-6 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。