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參數(shù)資料
| 型號(hào)： | AD7875KRZ |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 10/28頁(yè) |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT SAMPLING 5V 24SOIC |
| 產(chǎn)品變化通告： | Conversion Time Change |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 100k |
| 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： | 表面貼裝 |
| 封裝/外殼： | 24-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-SOIC W |
| 包裝： | 管件 |
| 輸入數(shù)目和類型： | 1 個(gè)單端，單極 |
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AD7870/AD7875/AD7876
Rev. C | Page 18 of
28
0
–30
–60
–90
–120
05
V(i), the estimated code transition point, is derived as follows:
0
07
73
0-
02
0
S
IG
NA
L
AM
P
L
IT
UDE
(
d
B)
FREQUENCY (kHz)
INPUT FREQUENCIES
F1 = 9.05kHz
F2 = 9.55kHz
SAMPLING FREQUENCY = 100kHz
TA = 25°C
IMD
ALL TERMS = 90.06dB
SECOND ORDER TERMS = 92.73dB
THIRD ORDER TERSM = 93.45dB
()
[
]
N
i
cum
Cos
A
i
V
×
π
×
=
where:
A is the peak signal amplitude.
N is the number of histogram samples.
cum(i) =
()
∑
=
i
n
V
0
occurrences.
0.5
–0.50
0.25
0
–0.25
0
511
1023
1535
2047
2559
3071
3583
4095
07
73
0-
02
1
A
C
RE
L
AT
IV
E
ACCU
RACY
(
L
S
B)
CODE
INPUT FREQUENCY = 25kHz
SAMPLE FREQUENCY = 100kHz
TA = 25°C
Figure 20. IMD Plot
AC Linearity Plot
When a sine wave of specified frequency is applied to the VIN
input of the AD7870/AD7875 and several million samples are
taken, a histogram showing the frequency of occurrence of each
of the 4096 ADC codes can be generated. From this histogram
data it is possible to generate an ac integral linearity plot as
shown in Figure 21. This shows very good integral linearity
performance from the AD7870/AD7875 at an input frequency
of 25 kHz. The absence of large spikes in the plot shows good
differential linearity. Simplified versions of the formulae used
are outlined below.
Figure 21. AC INL Plot
()
() ()
i
o
V
fs
V
o
V
i
V
i
INL
×
=
4096
where:
INL(i) is the integral linearity at code i.
V(fs) and V(o) are the estimated full-scale and offset transitions.
V(i) is the estimated transition for the ith code.
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| AD7875LNZ | 功能描述:IC ADC 12BIT SAMPLING 5V 24-DIP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉(zhuǎn)換器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 位數(shù):12 采樣率（每秒）:3M 數(shù)據(jù)接口:- 轉(zhuǎn)換器數(shù)目:- 功率耗散（最大）:- 電壓電源:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應(yīng)商設(shè)備封裝:SOT-23-6 包裝:帶卷 (TR) 輸入數(shù)目和類型:- |
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