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參數資料
| 型號： | AD7664AST |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 16-Bit, 570 kSPS CMOS ADC |
| 中文描述： | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PQFP48 |
| 封裝： | MS-026BBC, LQFP-48 |
| 文件頁數： | 11/19頁 |
| 文件大?。?/td> | 392K |
| 代理商： | AD7664AST |
REV. 0
AD7664
–11–
Table I. Output Codes and Ideal Input Voltages
Digital Output Code
Hexa
Straight
Binary
Analog
Input
Two’s
Complement
D
escription
FSR –1 LSB
FSR – 2 LSB
Midscale + 1 LSB
Midscale
Midscale – 1 LSB
–FSR + 1 LSB
–FSR
2.499962 V
2.499923 V
1.250038 V
1.25 V
1.249962 V
38
μ
V
0 V
FFFF
1
FFFE
8001
8000
7FFF
0001
0000
2
7FFF
1
7FFE
0001
0000
FFFF
8001
8000
2
NOTES
1
This is also the code for overrange analog input (V
IN
– V
INGND
above
V
– V
).
2
This is also the code for underrange analog input (V
IN
below V
INGND
)
TYPICAL CONNECTION DIAGRAM
Figure 5 shows a typical connection diagram for the AD7664.
Analog Input
Figure 6 shows an equivalent circuit of the input structure of
the AD7664.
C2
R1
D1
D2
C1
IN
OR INGND
AGND
AVDD
Figure 6. Equivalent Analog Input Circuit
The two diodes D1 and D2 provide ESD protection for the
analog inputs IN and INGND. Care must be taken to ensure
that the analog input signal never exceeds the supply rails by more
than 0.3 V. This will cause these diodes to become forward-
biased and start conducting current. These diodes can handle
a forward-biased current of 100 mA maximum. For instance,
these conditions could eventually occur when the input buffer’s
(U1) supplies are different from AVDD. In such case, an input
buffer with a short circuit current limitation can be used to
protect the part.
100nF
10 F
100nF
10 F
AVDD
10 F
100nF
AGND
DGND
DVDD
OVDD
OGND
WARP
IMPULSE
SER/
PAR
CNVST
BUSY
SDOUT
SCLK
RD
CS
RESET
PD
IN
INGND
REFGND
100nF
C
REF1
2.5V REF
1
REF
100
D
3
CLOCK
AD7664
ANALOG INPUT
(0V TO 2.5V)
C/ P/DSP
SERIAL
PORT
DIGITAL SUPPLY
(3.3V OR 5V)
ANALOG
SUPPLY
(5V)
NOTES:
1
THE AD780 IS RECOMMENDED WITH C
REF
= 47 F.
2
THE AD829 IS RECOMMENDED WITH A COMPENSATION CAPACITOR C
C
= 82 pF, TYPE CERAMIC NPO.
3
OPTIONAL LOW JITTER
CNVST
.
DVDD
C
C
OB/
2C
2.7nF
U1
2
15
Figure 5. Typical Connection Diagram
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相關代理商/技術參數 |
參數描述 |
|---|---|
| AD7664ASTRL | 制造商:Analog Devices 功能描述:ADC Single SAR 570ksps 16-bit Parallel/Serial 48-Pin LQFP T/R |
| AD7664ASTZ | 功能描述:IC ADC 16BIT UNIPOLAR 48-LQFP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:PulSAR® 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 |
| AD7664ASTZRL | 功能描述:IC ADC 16BIT UNIPOLAR 48LQFP RoHS:是 類別:集成電路 (IC) >> 數據采集 - 模數轉換器 系列:PulSAR® 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 |
| AD7664CST | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog to Digital Converter |
| AD7664CSTRL | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog to Digital Converter |
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