参数资料
型号: AD603AQ
厂商: Analog Devices Inc
文件页数: 10/25页
文件大小: 0K
描述: IC AMP VGA 90MHZ LN 50MA 8CDIP
标准包装: 48
系列: X-AMP®
放大器类型: 可变增益
电路数: 1
转换速率: 275 V/µs
-3db带宽: 90MHz
电流 - 输入偏压: 200nA
电流 - 电源: 12.5mA
电流 - 输出 / 通道: 50mA
电压 - 电源,单路/双路(±): 9.5 V ~ 12.6 V,±4.75 V ~ 6.3 V
工作温度: -40°C ~ 85°C
安装类型: 通孔
封装/外壳: 8-CDIP(0.300",7.62mm)
供应商设备封装: 8-CERDIP
包装: 管件
产品目录页面: 774 (CN2011-ZH PDF)
配用: AD603-EVALZ-ND - BOARD EVALUATION FOR AD603
Data Sheet
AD603
Rev. K | Page 17 of 24
connected to the control voltage and the GNEW inputs are
grounded. The gain scaling is then doubled to 80 dB/V,
requiring only a 1.00 V change for an 80 dB change of gain
Gain = (dB) = 80 VG + GO
(4)
where, as before, GO depends on the range selected; for example,
in the maximum bandwidth mode, GO is 20 dB. Alternatively,
the GNEG pins may be connected to an offset voltage of
0.500 V, in which case GO is 20 dB.
The amplitude of the gain ripple in this case is also doubled, as
shown in Figure 45, while the ISNR at the output of A2 now
decreases linearly as the gain increases, as shown in Figure 46.
00539-
043
VC (V)
2.2
–0.2
0
0.2
0.4
0.6
1.0
1.2
0.8
1.6
1.8
2.0
1.4
G
AI
N
E
RRO
R
(
d
B)
2.0
1.5
1.0
0.5
0
–0.5
–1.0
–1.5
–2.0
Figure 45. Gain Error for Cascaded Stages—Parallel Control
00539-
044
VC (V)
1.2
–0.2
0
0.2
0.4
0.6
0.8
1.0
IS
NR
(
d
B)
90
80
85
75
65
70
55
60
50
Figure 46. ISNR for Cascaded Stages—Parallel Control
LOW GAIN RIPPLE MODE (MINIMUM GAIN ERROR)
As can be seen in Figure 44 and Figure 45, the error in the gain
is periodic, that is, it shows a small ripple. (Note that there is
also a variation in the output offset voltage, which is due to the
gain interpolation, but this is not exact in amplitude.) By
offsetting the gains of A1 and A2 by half the period of the ripple,
that is, by 3 dB, the residual gain errors of the two amplifiers
can be made to cancel. Figure 47 shows much lower gain ripple
when configured in this manner. Figure 48 plots the ISNR as a
function of gain; it is very similar to that in the parallel mode.
00539-
045
VC (V)
1.1
–0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
G
AI
N
E
RRO
R
(
d
B)
3.0
2.5
2.0
1.5
1.0
0.5
–0.5
–1.0
0
–1.5
–2.0
–2.5
–3.0
Figure 47. Gain Error for Cascaded Stages—Low Ripple Mode
00539-
046
VC (V)
1.2
–0.2
0
0.2
0.4
0.6
0.8
1.0
IS
NR
(
d
B)
90
85
80
75
70
65
60
55
50
Figure 48. ISNR vs. Control Voltage—Low Ripple Mode
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AD603AR-REEL7 功能描述:IC AMP VGA 90MHZ LN 50MA 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 标准包装:2,500 系列:Excalibur™ 放大器类型:J-FET 电路数:1 输出类型:- 转换速率:45 V/µs 增益带宽积:10MHz -3db带宽:- 电流 - 输入偏压:20pA 电压 - 输入偏移:490µV 电流 - 电源:1.7mA 电流 - 输出 / 通道:48mA 电压 - 电源,单路/双路(±):4.5 V ~ 38 V,±2.25 V ~ 19 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC(0.154",3.90mm 宽) 供应商设备封装:8-SOIC 包装:带卷 (TR)
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