參數(shù)資料
型號： CS5528-ASZR
廠商： Cirrus Logic Inc
文件頁數(shù)： 38/56頁
文件大?。?/td> 0K
描述： IC ADC 24BIT 8CH 24-SSOP
標準包裝： 1,000
位數(shù)： 24
數(shù)據(jù)接口： 串行
轉換器數(shù)目： 1
功率耗散（最大）： 14.8mW
電壓電源： 模擬和數(shù)字
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 24-SSOP（0.209"，5.30mm 寬）
供應商設備封裝： 24-SSOP
包裝： 帶卷 (TR)
輸入數(shù)目和類型： 8 個單端，單極；8 個單端，雙極
CS5521/22/23/24/28
DS317F8
43
1.8 Power Supply Arrangements
The CS5521/22/23/24/28 A/D converters are de-
signed to operate from a single +5 V analog supply
and a single +5 V or +3 V digital supply. A -2.1 V
supply is usually generated from the charge pump
drive to provide power to the instrumentation am-
plifier’s
NBV
(negative
bias
voltage)
pin.
Figure 21 illustrates the CS5522 connected with a
+5 V analog supply and with the external compo-
nents required for the charge pump drive. This en-
ables the CS5522 to measure ground-referenced
signals with magnitudes down to ±100 mV.
Figure 22 illustrates the CS5522 connected to mea-
sure ground-referenced unipolar signals of a posi-
tive polarity using the 1 V, 2.5 V, and 5 V ranges
on the converter. For the 25 mV, 55 mV, and
100 mV ranges, the signals being digitized must
have a common mode between +1.85 to +2.65 V
(NBV = 0 V).
Although CS5521/22/23/24/28 are optimized for
the measurement of thermocouple outputs, they are
also well suited for the measurement of ratiometric
bridge transducer outputs. Figure 23 illustrates the
CS5522 connected to measure the output of a rati-
ometric differential bridge transducer while operat-
ing from a single +5 V supply. Bridge outputs may
range from 5 mV to 400 mV. See “Digital Gain
Scaling” on page 45 section about manipulating the
gain register to achieve optimum gain scaling.
XO U T
VD +
VA +
VR E F +
VR E F -
DG ND
NB V
AIN 1 +
SC L K
SD O
SD I
C S 5522
XIN
CP D
CS
10
Ω
+5 V
An a lo g
Su p p ly
0.1
μF0 .1 μF
20
19
3
1
AG N D
21 4
11
10
15
12
8
9
13
5
O p tion al
Clo c k
S ourc e
Se ria l
Da ta
In te rfa ce
7
32 .7 68 ~ 1 0 0 k H z
2.5 V
U p to ± 1 00 m V In pu t
AIN 1 -
4
10 k
Ω
0.1
μF
10
μF
1 N 4148
1 N 41 48
+
BA V 1 9 9
18
AIN2 +
17
AIN 2 -
16
A1
6
A0
C harg e -p um p n e tw o rk
fo r V D + = 5 V o n ly a n d
X IN = 32.76 8 k H z .
Lo g ic O u tp u ts :
A0 - A 1 S w itc h fro m
V A + to A G ND.
10 k
Ω
301
Ω
49 9
Ω
+5 V
V+
R
LM 334
Ab s o lu te
Cu rre n t
R e fe renc e
V-
C o ld J u nction
BA T 8 5
0.0 33
μF
Figure 21. CS5522 Configured to use on-chip charge pump to supply NBV
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