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參數(shù)資料
型號: AD7679AST
廠商: ANALOG DEVICES INC
元件分類: ADC
英文描述: 18-Bit, 2.5 LSB INL, 570 kSPS SAR ADC
中文描述: 1-CH 18-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL/PARALLEL ACCESS, PQFP48
封裝: LOW PROFILE, MS-026BBC, LQFP-48
文件頁數(shù): 16/28頁
文件大?。?/td> 1186K
代理商: AD7679AST
AD7679
Transfer Functions
Except in 18-bit interface mode, the AD7679 offers straight
binary and twos complement output coding when using OB/2C.
See Figure 24 and Table 8 for the ideal transfer characteristic.
000...000
000...001
000...010
111...101
111...110
111...111
ANALOG INPUT
+FS – 1.5 LSB
+FS – 1 LSB
–FS + 1 LSB
–FS
–FS + 0.5 LSB
A
03085-0-026
Figure 24. ADC Ideal Transfer Function
Table 8. Output Codes and Ideal Input Voltages
Description
FSR –1 LSB
FSR – 2 LSB
Midscale +
1 LSB
Midscale
Midscale –
1 LSB
–FSR + 1 LSB
–FSR
Analog Input
V
REF
= 4.096 V
4.095962 V
4.095924 V
31.25 μV
Straight
Binary
(Hex)
3FFFF
1
3FFFE
20001
Twos
Complement
(Hex)
1FFFF
1
1FFFE
00001
0 V
–31.25 μV
20000
1FFFF
00000
3FFFF
-4.095962 V
-4.096 V
00001
00000
2
20001
20000
2
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
).
AVDD
AGND
DGND
DVDD
OVDD
OGND
CNVST
BUSY
SDOUT
SCLK
RD
CS
RESET
PD
2.5V REF
NOTE 1
REFBUFIN
20
D
CLOCK
AD7679
μ
C/
μ
P/DSP
SERIAL PORT
DIGITAL SUPPLY
(3.3V OR 5V)
ANALOG
SUPPLY
(5V)
DVDD
OB/2C
NOTE 6
PDBUF
DVDD
50k
100nF
1M
IN+
ANALOG INPUT+
C
C
2.7nF
U1
+
NOTE 3
NOTE 4
AD8021
30
NOTE 2
NOTE 5
ADR421
10
μ
F
100nF
+
10
μ
F
100nF
+
100nF
+
10
μ
F
IN–
ANALOG INPUT–
C
C
2.7nF
U2
+
NOTE 3
NOTE 4
AD8021
30
50
100nF
NOTES
1. SEE VOLTAGE REFERENCE INPUT SECTION.
2. OPTIONAL CIRCUITRY FOR HARDWARE GAIN CALIBRATION.
3.THE AD8021 IS RECOMMENDED. SEE DRIVER AMPLIFIER CHOICE SECTION.
4. SEE ANALOG INPUTS SECTION.
5. OPTION, SEE POWER SUPPLY SECTION.
6. OPTIONAL LOW JITTER CNVST, SEE CONVERSION CONTROL SECTION.
47
μ
F
MODE1
MODE0
NOTE 1
C
REF
REF
REFGND
03085-0-027
Figure 25. Typical Connection Diagram (Internal Reference Buffer, Serial Interface)
Rev. 0 | Page 16 of 28
相關(guān)PDF資料
PDF描述
AD7679ASTRL 18-Bit, 2.5 LSB INL, 570 kSPS SAR ADC
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD7679ASTRL 制造商:Analog Devices 功能描述:ADC Single SAR 570ksps 18-bit Parallel/Serial 48-Pin LQFP T/R 制造商:Analog Devices 功能描述:ADC SGL SAR 570KSPS 18BIT PARALLEL/SERL 48LQFP - Tape and Reel
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AD7679ASTZRL 功能描述:IC ADC 18BIT SAR W/BUFF 48LQFP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:PulSAR® 標(biāo)準(zhǔn)包裝:1 系列:- 位數(shù):14 采樣率(每秒):83k 數(shù)據(jù)接口:串行,并聯(lián) 轉(zhuǎn)換器數(shù)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(yīng)商設(shè)備封裝:28-PDIP 包裝:管件 輸入數(shù)目和類型:1 個單端,雙極
AD7679CB1 制造商:AD 制造商全稱:Analog Devices 功能描述:18-Bit, 2.5 LSB INL, 570 kSPS SAR ADC
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