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參數(shù)資料
| 型號： | AD7938BSUZ-6 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 31/32頁 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT 8CHAN 32TQFP |
| 標準包裝： | 1 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 625k |
| 數(shù)據(jù)接口： | 并聯(lián) |
| 轉(zhuǎn)換器數(shù)目： | 1 |
| 功率耗散（最大）： | 7.5mW |
| 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： | 32-TQFP |
| 供應商設備封裝： | 32-TQFP（7x7） |
| 包裝： | 托盤 |
| 輸入數(shù)目和類型： | 8 個單端，單極；4 個差分，單極；4 個偽差分，單極；7 偽差分，單極 |
| 配用： | EVAL-AD7938CBZ-ND - EVAL BOARD FOR AD7938 |
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AD7938-6
Data Sheet
Rev. C | Page 8 of 32
Pin No.
Mnemonic
Description
19
RD
Read Input. Active low logic input used in conjunction with CS to access the conversion result. The conversion
result is placed on the data bus following the falling edge of RD read while CS is low.
20
CS
Chip Select. Active low logic input used in conjunction with RD and WR to read conversion data or to write data
to the internal registers.
21
AGND
Analog Ground. This is the ground reference point for all analog circuitry on the AD7938-6. 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.
22
VREFIN/VREFOUT
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. It is recommended that this pin
be decoupled to AGND with a 470 nF capacitor. This pin can be overdriven by an external reference. The input
voltage range for the external reference is 0.1 V to VDD; however, care must be taken to ensure that the analog
23 to 30
VIN0 to VIN7
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 VREF or 0 V to 2 × VREF, 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.
31
VDD
Power Supply Input. The VDD range for the AD7938-6 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.
32
W/B
Word/Byte Input. When this input is logic high, data is transferred to and from the AD7938-6 in 12-bit words on
Pin DB0 to Pin DB11. When this pin is logic low, byte transfer mode is enabled. Data and the channel ID are
transferred on Pin DB0 to Pin DB7, and Pin DB8/HBEN assumes its HBEN functionality. Unused data lines when
operating in byte transfer mode should be tied off to DGND.
EPAD
Exposed Pad. The exposed pad is located on the underside of the package. Connect the EPAD to the ground
plane of the PCB using multiple vias.
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| AD7938BSUZ-6REEL7 | 功能描述:IC ADC 12BIT 8CHAN 32TQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 其它有關文件:TSA1204 View All Specifications 標準包裝:1 系列:- 位數(shù):12 采樣率（每秒）:20M 數(shù)據(jù)接口:并聯(lián) 轉(zhuǎn)換器數(shù)目:2 功率耗散（最大）:155mW 電壓電源:模擬和數(shù)字 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-TQFP 供應商設備封裝:48-TQFP（7x7） 包裝:Digi-Reel® 輸入數(shù)目和類型:4 個單端，單極；2 個差分，單極 產(chǎn)品目錄頁面:1156 (CN2011-ZH PDF) 其它名稱:497-5435-6 |
| AD7938BSUZ-REEL7 | 功能描述:IC ADC 12BIT 8CHAN 32TQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 標準包裝: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） 供應商設備封裝: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 |
| AD7939 | 制造商:AD 制造商全稱:Analog Devices 功能描述:8-Channel, 1.5 MSPS, 12-Bit and 10-Bit Parallel ADCs with a Sequencer |
| AD7939BCP | 制造商:Analog Devices 功能描述:ADC Single SAR 1.5Msps 10-bit Parallel 32-Pin LFCSP EP |
| AD7939BCP-REEL | 制造商:Analog Devices 功能描述:ADC SGL SAR 1.5MSPS 10-BIT PARALLEL 32LFCSP EP - Tape and Reel |
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