参数资料
型号: ADA4938-2ACPZ-RL
厂商: Analog Devices Inc
文件页数: 15/28页
文件大小: 0K
描述: IC ADC DRIVER DUAL DIFF 24LFCSP
标准包装: 5,000
类型: ADC 驱动器
应用: 数据采集
安装类型: 表面贴装
封装/外壳: 24-VFQFN 裸露焊盘,CSP
供应商设备封装: 24-LFCSP-VQ(4x4)
包装: 带卷 (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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