参数资料
| 型号： | AD603AQ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 8/25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 15 of 24
USING THE AD603 IN CASCADE
Two or more AD603s can be connected in series to achieve
higher gain. Invariably, ac coupling must be used to prevent the
dc offset voltage at the output of each amplifier from overloading
the following amplifier at maximum gain. The required high-
pass coupling network is usually just a capacitor, chosen to set
the desired corner frequency in conjunction with the well-
defined 100 Ω input resistance of the following amplifier.
For two AD603s, the total gain control range becomes 84 dB
(2 × 42.14 dB); the overall 3 dB bandwidth of cascaded stages
is somewhat reduced. Depending on the pin strapping, the gain
and bandwidth for two cascaded amplifiers can range from
22 dB to +62 dB (with a bandwidth of about 70 MHz) to
+22 dB to +102 dB (with a bandwidth of about 6 MHz).
There are several ways of connecting the gain control inputs
in cascaded operation. The choice depends on whether it is
important to achieve the highest possible instantaneous signal-
to-noise ratio (ISNR), or, alternatively, to minimize the ripple
in the gain error. The following examples feature the AD603
programmed for maximum bandwidth; the explanations apply
to other gain/bandwidth combinations with appropriate
changes to the arrangements for setting the maximum gain.
SEQUENTIAL MODE (OPTIMAL SNR)
In the sequential mode of operation, the ISNR is maintained at
its highest level for as much of the gain control range as possible.
Figure 37 shows the SNR over a gain range of 22 dB to +62 dB,
assuming an output of 1 V rms and a 1 MHz bandwidth. Figure 38,
Figure 39, and Figure 40 show the general connections to
accomplish this. Here, both the positive gain control inputs
(GPOS) are driven in parallel by a positive-only, ground-referenced
source with a range of 0 V to 2 V, while the negative gain
control inputs (GNEG) are biased by stable voltages to provide
the needed gain offsets. These voltages may be provided by
resistive dividers operating from a common voltage reference.
00
53
9-
0
3
5
VC (V)
2.2
–0.2
0.6
0.2
1.4
1.0
1.8
S
NR
(
d
B)
90
80
85
70
75
65
55
60
50
Figure 37. SNR vs. Control Voltage, Sequential Control (1 MHz Bandwidth)
31.07dB
–42.14dB
GPOS
GNEG
31.07dB
–42.14dB
GPOS
GNEG
–40.00dB
–51.07dB
–8.93dB
INPUT
0dB
VC = 0V
VG1
VG2
VO1 = 0.473V
VO2 = 1.526V
OUTPUT
–20dB
A2
A1
005
39
-03
6
Figure 38. AD603 Gain Control Input Calculations for Sequential Control Operation VC = 0 V
31.07dB
–42.14dB
GPOS
GNEG
31.07dB
0dB
GPOS
GNEG
0dB
–11.07dB
31.07dB
INPUT
0dB
VC = 1.0V
VG1
VG2
VO1 = 0.473V
VO2 = 1.526V
OUTPUT
20dB
00
53
9-
0
37
Figure 39. AD603 Gain Control Calculations for Sequential Control Operation VC = 1.0 V
31.07dB
–2.14dB
GPOS
GNEG
31.07dB
0dB
GPOS
GNEG
0dB
–28.93dB
31.07dB
INPUT
0dB
VC = 2.0V
VG1
VG2
VO1 = 0.473V
VO2 = 1.526V
OUTPUT
60dB
00
53
9-
03
8
Figure 40. AD603 Gain Control Input Calculations for Sequential Operation VC = 2.0 V
相关PDF资料 |
PDF描述 |
|---|---|
| LT1101IN8#PBF | IC PREC INSTRMNT-AMP SNGL 8-DIP |
| RMCF0603JT180R | RES 180 OHM 1/10W 5% 0603 SMD |
| LT1885IS#PBF | IC OPAMP QUAD R-R PICO/IN 14SOIC |
| RMCF0603JT33R0 | RES 33 OHM 1/10W 5% 0603 SMD |
| LT1362CS#PBF | IC OP-AMP HISPD 50MHZ QUAD16SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD603AR | 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) |
| AD603AR-REEL | 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) |
| 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) |
| AD603ARZ | 功能描述:IC AMP VGA 90MHZ LN 50MA 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 标准包装:2,500 系列:- 放大器类型:通用 电路数:4 输出类型:- 转换速率:0.6 V/µs 增益带宽积:1MHz -3db带宽:- 电流 - 输入偏压:45nA 电压 - 输入偏移:2000µV 电流 - 电源:1.4mA 电流 - 输出 / 通道:40mA 电压 - 电源，单路/双路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:14-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:14-TSSOP 包装:带卷 (TR) 其它名称:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| AD603ARZ | 制造商:Analog Devices 功能描述:Programmable Gain Amplifier IC |
发布紧急采购，3分钟左右您将得到回复。