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參數(shù)資料
| 型號(hào)： | AD7722AS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類(lèi)： | ADC |
| 英文描述： | 16-Bit, 195 kSPS CMOS, Sigma-Delta ADC |
| 中文描述： | 1-CH 16-BIT DELTA-SIGMA ADC, SERIAL/PARALLEL ACCESS, PQFP44 |
| 封裝： | MS-022AA, MQFP-44 |
| 文件頁(yè)數(shù)： | 21/24頁(yè) |
| 文件大小： | 526K |
| 代理商： | AD7722AS |
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AD7722
–21–
REV. 0
A minimum etch technique is generally best for ground planes
because it gives the best shielding. Noise can be minimized by
paying attention to the system layout and preventing different
signals from interfering with each other. High level analog
signals should be separated from low level analog signals, and
both should be kept away from digital signals. In waveform
sampling and reconstruction systems, the sampling clock
(CLKIN) is as vulnerable to noise as any analog signal. CLKIN
should be isolated from the analog and digital systems. Fast
switching signals like clocks should be shielded with their
associated ground to avoid radiating noise to other sections of
the board, and clock signals should never be routed near the
analog inputs.
Avoid running digital lines under the device as these will couple
noise onto the die. The analog ground plane should be allowed
to run under the AD7722 to shield it from noise coupling. The
power supply lines to the AD7722 should use as large a trace as
possible (preferably a plane) to provide a low impedance path
and reduce the effects of glitches on the power supply line.
Avoid crossover of digital and analog signals. Traces on opposite
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
44-Pin PQFP
(S-44)
0.557 (14.15)
0.537 (13.65)
(PINS DOWN)
1
33
34
44
11
12
23
22
0.033 (0.84)
0.029 (0.74)
0.398 (10.10)
0.390 (9.90)
0.018 (0.45)
0.012 (0.30)
0.083 (2.11)
0.077 (1.96)
0.040 (1.02)
0.032 (0.81)
0.040 (1.02)
0.032 (0.81)
SEATING
PLANE
0.096 (2.44)
MAX
0.037 (0.95)
0.026 (0.65)
8
°
0
°
sides of the board should run at right angles to each other. This
will reduce the effects of feedthrough through the board.
AV
DD
1
AGND1
AV
DD
AGND
AV
DD
AGND
DV
DD
DGND
DGND
14
10
20
19
23
25
39
6
28
100nF
100nF
100nF
1nF
10
100μF
10μF
100μF
100nF
10μF
+5V
Figure 44. Power Supply Decoupling
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7722AS-ES | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AD7722ASZ | 功能描述:IC ADC 16BIT 195KSPS 44-MQFP RoHS:是 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 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(lèi)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(lèi)型:1 個(gè)單端，雙極 |
| AD7722CSZ | 制造商:Analog Devices 功能描述: |
| AD7723 | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:16-Bit, 1.2 MSPS CMOS, Sigma-Delta ADC |
| AD7723BS | 制造商:Analog Devices 功能描述:ADC Single Delta-Sigma 19.2Msps 16-bit Parallel/Serial 44-Pin MQFP 制造商:Analog Devices 功能描述:Analog-Digital Converter IC Number of Bi |
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