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參數(shù)資料
| 型號： | AD7939BCP |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer |
| 中文描述： | 8-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, QCC32 |
| 封裝： | MO-220-VHHD-2, LFCSP-32 |
| 文件頁數(shù)： | 10/32頁 |
| 文件大?。?/td> | 1332K |
| 代理商： | AD7939BCP |
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AD7938/AD7939
Preliminary Technical Data
Pin
No
Mnemonic
Function
the internal registers.
Analog Ground. This is the ground reference point for all analog circuitry on the AD7938/AD7939. All analog input
signals and any external reference signal should be referred to this AGND voltage. The AGND and DGND voltages
should ideally be at the same potential and must not be more than 0.3 V apart, even on a transient basis.
V
REFIN
/V
REFOUT
Reference Input/Output. This pin is connected to the internal reference and is the reference source for the ADC. The
nominal internal reference voltage is 2.5 V and this appears at this pin. This pin can be overdriven by an external
reference. The input voltage range for the external reference is 0.1 V to 3.5 V for the differential mode and is 0.1 V to
V
DD
for the single-ended and pseudo-differential modes, depending on V
DD
.
V
IN
0 to V
IN
7
Analog Input 0 to Analog Input 7. Eight analog input channels that are multiplexed into the on-chip track-and-hold.
The analog inputs can be programmed to be eight single-ended inputs, four fully differential pairs, four pseudo-
differential pairs, or seven pseudo-differential inputs by setting the MODE bits in the control register appropriately
(see Table 9). The analog input channel to be converted can either be selected by writing to the address bits (ADD2
to ADD0) in the control register prior to the conversion or the on-chip sequencer can be used. The SEQ and SHDW
bits in conjunction with the address bits in the control register allow the shadow register to be programmed. The
input range for all input channels can either be 0 V to V
REF
or 0 V to 2 × V
REF
, and the coding can be binary or twos
complement, depending on the states of the RANGE and CODING bits in the control register. Any unused input
channels should be connected to AGND to avoid noise pickup.
V
DD
Power Supply Input. The V
DD
range for the AD7938/AD7939 is 2.7 V to 5.25 V. The supply should be decoupled to
AGND with a 0.1 μF capacitor and a 10 μF tantalum capacitor.
W/B
Word/Byte Input. When this input is logic high, data is transferred to and from the AD7938/AD7939 in 12-bit/10-bit
words on Pins DB0/DB2 to DB11. When this pin is logic low, byte transfer mode is enabled. Data and the channel ID
are transferred on Pins DB0 to DB7, and Pin DB8/HBEN assumes its HBEN functionality.
21
AGND
22
23
to
30
31
32
Rev. PrN | Page 10 of 32
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| AD7939BCP-REEL | 制造商:Analog Devices 功能描述:ADC SGL SAR 1.5MSPS 10-BIT PARALLEL 32LFCSP EP - Tape and Reel |
| AD7939BCP-REEL7 | 制造商:Analog Devices 功能描述:ADC Single SAR 1.5Msps 10-bit Parallel 32-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:ADC SGL SAR 1.5MSPS 10-BIT PARALLEL 32LFCSP EP - Tape and Reel |
| AD7939BCPZ | 功能描述:IC ADC 10BIT 8CH PARALL 32LFCSP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 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 |
| AD7939BCPZ-REEL7 | 功能描述:IC ADC 10BIT 8CH PARALL 32LFCSP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 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 |
| AD7939BSU | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
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