參數(shù)資料
型號(hào)： ADA4938-1ACPZ-RL
廠商： Analog Devices Inc
文件頁數(shù)： 15/28頁
文件大?。?/td> 0K
描述： IC ADC DRIVER DIFF 16-LFCSP
標(biāo)準(zhǔn)包裝： 5,000
類型： ADC 驅(qū)動(dòng)器
應(yīng)用： 數(shù)據(jù)采集
安裝類型： 表面貼裝
封裝/外殼： 16-VFQFN 裸露焊盤，CSP
供應(yīng)商設(shè)備封裝： 16-LFCSP-VQ
包裝： 帶卷 (TR)
ADA4938-1/ADA4938-2
Rev. A | Page 22 of 28
Table 10 and Table 11 list several common gain settings, associated
resistor values, input impedances, and output noise densities for
both balanced and unbalanced input configurations. Also shown
are the input common-mode voltages under the given conditions
for different VOCM settings for both a 10 V single supply and
±5 V dual supplies.
Table 10. Differential Ground-Referenced Input, DC-Coupled; See Figure 59
Nominal
Gain (V/V)
RF (Ω)
RG (Ω)
RIN,dm (Ω)
Differential
Output
Noise Density
(nV/√Hz)
Common-Mode Level at +IN, IN (V)
+VS = 10 V, VS = 0 V
VOUT,dm = 2.0 V p-p
+VS = 5 V, VS = 5 V
VOUT,dm = 2.0 V p-p
VOCM = 2.5 V
VOCM = 3.5 V
VOCM = 1.0 V
VOCM = 3.2 V
1
200
400
6.5
1.25
1.75
0.50
1.60
2
402
200
400
10.4
0.83
1.16
0.33
1.06
3.16
402
127
254
13.4
0.60
0.84
0.24
0.77
5
402
80.6
161
18.2
0.42
0.58
0.17
0.53
Table 11. Single-Ended Ground-Referenced Input, DC-Coupled, RS = 50 Ω; See Figure 60
Nominal
Gain (V/V)
RF (Ω)
RG1 (Ω) RT (Ω)
RIN,se (Ω)
RG2 (Ω)1
Overall
Gain (V/V)2
Differential
Output
Noise
Density
(nV/√Hz)
Common-Mode Swing at +IN, IN (V)
+VS = 10 V, VS = 0 V
VOUT,dm = 2.0 V p-p
+VS = 5 V, VS = 5 V
VOUT,dm = 2.0 V p-p
VOCM = 2.5 V
VOCM = 3.5 V
VOCM = 0 V
VOCM = 2.0 V
1
200
60.4
267
226
0.9
6.2
1.00 to 1.50
1.50 to 2.00
0.25 to +0.25
0.75 to 1.25
2
402
200
60.4
300
226
1.8
9.8
0.66 to 1.00
1.00 to 1.33
0.17 to +0.17
0.50 to 0.83
3.16
402
127
66.5
205
158
2.5
11.8
0.48 to 0.72
0.72 to 0.96
0.12 to +0.12
0.36 to 0.60
5
402
80.6
76.8
138
110
3.6
14.7
0.33 to 0.50
0.50 to 0.67
0.08 to +0.08
0.25 to 0.42
1 RG2 = RG1 + RTS.
2 Includes effects of termination match.
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