参数资料
| 型号： | AD604AR-REEL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 13/33页 |
| 文件大小： | 0K |
| 描述： | IC AMP VGA DUAL ULN 40MA 24SOIC |
| 标准包装： | 1,000 |
| 系列： | X-AMP® |
| 放大器类型： | 可变增益 |
| 电路数： | 2 |
| 转换速率： | 170 V/µs |
| -3db带宽： | 40MHz |
| 电流 - 输入偏压： | 400nA |
| 电流 - 电源： | 32mA |
| 电流 - 输出 / 通道： | 40mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC W |
| 包装： | 带卷 (TR) |
| 配用： | AD604-EVALZ-ND - BOARD EVAL FOR AD604 AMP |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页当前第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页
AD604
Rev. G | Page 19 of 32
VG
13
16
15
14
19
18
17
24
23
22
21
20
12
11
10
9
8
1
2
3
4
7
6
5
AD604
–5V
+5V
VREF
RF OUT
–5V
+5V
8
7
6
5
1
2
3
4
AD711
NC
OUT
AD835
+5V
–5V
+5V
2
VSET (<0V)
–DSX1
+DSX1
PAI1
FBK1
PAO1
COM1
COM2
PAI2
FBK2
PAO2
+DSX2
–DSX2
VGN1
VREF
VPOS
GND1
OUT1
VNEG
VPOS
GND2
OUT2
VOCM
VGN2
FB
+5V
–5V
ALL SUPPLY PINS ARE DECOUPLED AS SHOWN.
1V
OFFS
NULL
C1
0.1F
C2
0.1F
VIN
(MAX
800mV p-p)
R1
49.9
C3
0.1F
C4
0.1F
C12
0.1F
C13
0.1F
C7
0.1F
C6
0.56F
R2
453
R3
1k
C7
0.33F
V1 = VIN ×G
R4
2k
C8
0.33F
87
6
5
1
234
C9
0.33F
R5
2k
R6
2k
–(A)2
IF V1 = A × cos (wt)
Y1
Y2
VN
Z
X1
X2
VP
W
–(V1)2
LOW-
PASS
FILTER
R7
1k
C10
1F
C11
1F
R8
2k
+VS
–VS
OFFS
NULL
00
54
0-
0
44
Figure 44. AGC Amplifier with 82 dB of Gain Range
ULTRALOW NOISE AGC AMPLIFIER WITH 82 dB TO
96 dB GAIN RANGE
Figure 44 shows an implementation of an AGC amplifier with
82 dB of gain range using a single AD604. The signal is applied
to connector VIN and, because the signal source is 50 Ω, a
terminating resistor (R1) of 49.9 Ω is added. The signal is then
amplified by 14 dB (Pin FBK1 shorted to PAO1) through the
Channel 1 preamplifier and is further processed by the Channel 1
DSX. Next, the signal is applied directly to the Channel 2 DSX. The
second preamplifier is powered down by connecting its COM2 pin
to the positive supply as explained in the Preamplifier section.
C1 and C2 level shift the signal from the preamplifier into the
first DSX and, at the same time, eliminate any offset contribution
of the preamplifier. C3 and C4 have the same offset cancellation
purpose for the second DSX. Each set of capacitors, combined
with the 175 Ω input resistance of the corresponding DSX,
provides a high-pass filter with a 3 dB corner frequency of
about 9.1 kHz. VOCM is decoupled to ground by a 0.1 μF
capacitor, while VREF can be externally provided; in this
application, the gain scale is set to 20 dB/V by applying 2.500 V.
Because each DSX amplifier operates from a single 5 V supply,
the output is ac-coupled via C6 and C7. The output signal can
be monitored at the connector labeled RF OUT.
the AD604 connected as shown in Figure 44. The gain range is
14 dB to +82 dB; the useful range is 0 dB to +82 dB if the RF
output amplitude is controlled to ±400 mV (+2 dBm). The main
limitation on the lower end of the signal range is the input
capability of
the preamplifier. This limitation can be overcome by adding an
attenuator in front of the preamplifier, but that would defeat the
advantage of the ultralow noise preamplifier. It should be noted
that the second preamplifier is not used because its ultralow
noise and the associated high-power consumption are overkill
after the first DSX stage. It is disabled in this application by
connecting the COM2 pin to the positive supply. Nevertheless,
the second preamplifier can be used, if so desired, and the
useful gain range increases by 14 dB to encompass 0 dB to
96 dB of gain. For the same +2 dBm output, this allows signals
as small as 94 dBm to be measured.
To achieve the highest gains, the input signal must be band-
limited to reduce the noise; this is especially true if the second
preamplifier is used. If the maximum signal at OUT2 of the AD604
is limited to ±400 mV (+2 dBm), the input signal level at the
AGC threshold is +25 μV rms (79 dBm). The circuit as shown in
Figure 44 has about 40 MHz of noise bandwidth; the 0.8 nV/√Hz
of input referred voltage noise spectral density of the AD604
results in an rms noise of 5.05 μV in the 40 MHz bandwidth.
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| AD604ARSZ | 功能描述:IC AMP VGA DUAL ULN 40MA 24SSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 标准包装:1 系列:- 放大器类型:通用 电路数:4 输出类型:满摆幅 转换速率:0.028 V/µs 增益带宽积:105kHz -3db带宽:- 电流 - 输入偏压:3nA 电压 - 输入偏移:100µV 电流 - 电源:3.3µA 电流 - 输出 / 通道:12mA 电压 - 电源，单路/双路(±):2.7 V ~ 12 V，±1.35 V ~ 6 V 工作温度:-40°C ~ 85°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:剪切带 (CT) 其它名称:OP481GRUZ-REELCT |
| AD604ARSZ-R7 | 功能描述:IC AMP VGA DUAL ULN 40MA 24SSOP RoHS:是 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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