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參數資料
| 型號： | AD7621ASTRL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | ADC |
| 英文描述： | 16-Bit, 1 LSB INL, 3 MSPS PulSAR ADC |
| 中文描述： | 1-CH 16-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PQFP48 |
| 封裝： | MO-026-BBC, LQFP-48 |
| 文件頁數： | 16/26頁 |
| 文件大?。?/td> | 265K |
| 代理商： | AD7621ASTRL |
REV. Pr D
PRELIMINARY TECHNICAL DATA
AD7621
–16–
100nF
10 F
100nF
10 F
AVDD
REFBUFIN
10 F
100nF
AGND
DGND
DVDD
OVDD
OGND
CNVST
BUSY
SDOUT
SCLK
RD
CS
RESET
PD
10
D
CLOCK
AD7621
C/ P/DSP
SERIAL
PORT
DIGITAL SUPPLY
(2.5V OR 3.3V)
ANALOG
SUPPLY
(2.5V)
DVDD
OB/2C
note 6
DVDD
IN+
IN-
ANALOG INPUT-
C
C
1.2nF
note 3
15
note 5
50
note 4
AD8021
NOTES :
Note 1 : See Voltage Reference Input Section.
Note 2 : CREF is 10 F ceramic capacitor or low esr tantalum. Ceramic size 1206 Panasonic ECJ-3xB0J106 is recommended. See Voltage Reference Input Section.
Note 3 : The AD8021 is recommended. See Driver Amplifier Choice Section.
Note 4 : See Analog Inputs Section.
Note 5 : Option. See Power Supply Section.
Note 6 : Optional Low jitter CNVST. See Conversion Control Section.
ANALOG INPUT+
C
C
1.2nF
note 3
15
note 4
AD8021
MODE1
MODE0
REFGND
C
REF
REF
10 F
note 2
PDBUF
PDREF
C
REF
100nF
note 1
Transfer Functions
Using the OB/
2C
digital input, the AD7621 offers two
output codings: straight binary and two’s complement.
The ideal transfer characteristic for the AD7621 is shown
in Figure 4 and Table III.
000...000
000...001
000...010
111...101
111...110
111...111
A
ANALOG INPUT
+FS-1.5 LSB
+FS-1 LSB
-FS+1 LSB
-FS
-FS+0.5 LSB
Figure 4. ADC Ideal Transfer Function
Table III. Output Codes and Ideal Input Voltages
Digital Output Code
Hexa
Straight
Binary
Analog
Input
V
REF
= 2.048V
Two’s
Comple-
ment
D
escription
FSR –1 LSB
FSR – 2 LSB
Midscale + 1 LSB 75.684μV
Midscale
Midscale – 1 LSB
–FSR + 1 LSB
–FSR
2.047924 V
2.047849 V
3FFFF
1
3FFFE
20001
20000
1FFFF
00001
00000
2
1FFFF
1
1FFE
00001
00000
3FFFF
20001
20000
2
0 V
-75.684μV
-2.047924 V
-2.048 V
NOTES
1
This is also the code for overrange analog input (V
IN+
– V
IN-
above
V
REF
– V
REFGND
).
2
This is also the code for underrange analog input (V
IN+
– V
IN-
below
-V
REF
+ V
REFGND
).
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相關代理商/技術參數 |
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| AD7621ASTZ | 功能描述:IC ADC 16BIT 2MSPS DIFF 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 |
| AD7621ASTZ1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:16-Bit, 2 LSB INL, 3 MSPS PulSAR?? ADC |
| AD7621ASTZRL | 功能描述:IC ADC 16BIT 2MSPS DIFF 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 |
| AD7621ASTZRL1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:16-Bit, 2 LSB INL, 3 MSPS PulSAR?? ADC |
| ad7621xst-u2 | 制造商:Analog Devices 功能描述:16-BIT, 1 LSB INL, 3 MSPS PULSAR- ADC - Bulk |
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