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參數資料
| 型號： | AD7865AS-3 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | Four-Channel, Simultaneous Sampling, Fast, 14-Bit ADC |
| 中文描述： | 4-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PQFP44 |
| 封裝： | PLASTIC, QFP-44 |
| 文件頁數： | 7/19頁 |
| 文件大?。?/td> | 195K |
| 代理商： | AD7865AS-3 |
AD7865
–7–
REV. A
Pin
Mnemonic
Description
Reference Input/Output. This pin provides access to the internal reference (+2.5 V
±
20 mV)
and also allows the internal reference to be overdriven by an external reference source (+2.5 V
±
5%). A 0.1
μ
F decoupling capacitor should be connected between this pin and AGND.
Analog Positive Supply Voltage, +5.0 V
±
5%. A 0.1
μ
F decoupling capacitor should be con-
nected between this pin and AGND.
Analog Ground. General Analog Ground. This AGND pin should be connected to the system’s
AGND plane.
Data Bit 13 is the MSB, followed by Data Bit 12 to Data Bit 6. Three-state TTL outputs.
Output coding is twos complement for AD7865-1 and AD7865-3, and straight binary for
AD7865-2.
Positive Supply Voltage for Digital section, +5.0 V
±
5%. A 0.1
μ
F decoupling capacitor
should be connected between this pin and AGND. Both DV
DD
and AV
DD
should be exter-
nally tied together.
This pin provides the positive supply voltage for the output drivers (DB0 to DB13), BUSY,
EOC
and FRSTDATA. It is normally tied to DV
DD
. V
DRIVE
should be decoupled with a
0.1
μ
F capacitor. It allows improved performance when reading during the conversion se-
quence. Also, the output data drivers may be powered by a 3 V
±
10% supply to facilitate
interfacing to 3 V processors and DSPs.
Digital Ground. Ground reference for Digital circuitry. This DGND pin should be connected
to the system’s DGND
plane. The system’s DGND and AGND planes should be connected
together at one point only, preferably at an AGND pin.
Data Bit 5 to Data Bit 4. Three-state TTL outputs.
Data Bit 3 to Data Bit 0. Bidirectional data pins. When a read operation takes place, these
pins are three-state TTL outputs. The channel select register is programmed with the data on
the DB0–DB3 pins with standard
CS
and
WR
signals. DB0 represents Channel 1 and DB3
represents Channel 4.
End-of-Conversion. Active low logic output indicating conversion status. The end of each
conversion in a conversion sequence is indicated by a low going pulse on this line.
24
V
REF
25
AV
DD
26
AGND
27–34
DB13–DB6
35
DV
DD
36
V
DRIVE
37
DGND
38, 39
40–43
DB5, DB4
DB3–DB0
44
EOC
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相關代理商/技術參數 |
參數描述 |
|---|---|
| AD7865AS-3REEL | 制造商:Analog Devices 功能描述:ADC Single SAR 350ksps 14-bit Parallel 44-Pin MQFP T/R |
| AD7865ASZ | 制造商:AD 制造商全稱:Analog Devices 功能描述:Four-Channel, Simultaneous Sampling, Fast, 14-Bit ADC |
| AD7865ASZ-1 | 功能描述:IC ADC 14BIT DUAL 4CH 44-MQFP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1 系列:microPOWER™ 位數:8 采樣率（每秒）:1M 數據接口:串行，SPI? 轉換器數目:1 功率耗散（最大）:- 電壓電源:模擬和數字 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 供應商設備封裝:24-VQFN 裸露焊盤（4x4） 包裝:Digi-Reel® 輸入數目和類型:8 個單端，單極 產品目錄頁面:892 (CN2011-ZH PDF) 其它名稱:296-25851-6 |
| AD7865ASZ-1REEL | 功能描述:IC ADC 14BIT 4CHAN 5V 44-MQFP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1,000 系列:- 位數:12 采樣率（每秒）:300k 數據接口:并聯 轉換器數目: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) 輸入數目和類型:1 個單端，單極；1 個單端，雙極 |
| AD7865ASZ-2 | 功能描述:IC ADC 14BIT 4CHAN 5V 44MQFP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:- 標準包裝:1 系列:- 位數:14 采樣率（每秒）:83k 數據接口:串行，并聯 轉換器數目:1 功率耗散（最大）:95mW 電壓電源:雙 ± 工作溫度:0°C ~ 70°C 安裝類型:通孔 封裝/外殼:28-DIP（0.600"，15.24mm） 供應商設備封裝:28-PDIP 包裝:管件 輸入數目和類型:1 個單端，雙極 |
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