參數(shù)資料
型號(hào)： AD602JRZ-RL
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 18/33頁(yè)
文件大?。?/td> 0K
描述： IC AMP VGA DUAL LN 50MA 16SOIC
標(biāo)準(zhǔn)包裝： 1,000
系列： X-AMP®
放大器類型： 可變?cè)鲆?br>
電路數(shù)： 2
轉(zhuǎn)換速率： 275 V/µs
-3db帶寬： 35MHz
電流 - 輸入偏壓： 350nA
電流 - 電源： 11mA
電流 - 輸出 / 通道： 50mA
電壓 - 電源，單路/雙路(±)： ±4.75 V ~ 5.25 V
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 16-SOIC（0.295"，7.50mm 寬）
供應(yīng)商設(shè)備封裝： 16-SOIC W
包裝： 帶卷 (TR)
AD600/AD602
Rev. F | Page 24 of 32
Figure 51 shows the circuit for the sequential control scheme.
R6 to R9 with R16 provide offsets of 42.14 dB between the
individual amplifiers to ensure smooth transitions between the
gain of each successive X-AMP, with the sequence of gain
increase being U1A, then U1B, and then U2A. The adjustable
attenuator provided by R3 + R17 and the 100 Ω input resistance
of U1A, as well as the fixed 6 dB attenuation provided by R2
and the input resistance of U1B, are included both to set VLOG to
read 0 dB when VIN is 3.16 mV rms and to center the 100 dB
range between 10 μV rms and 1 V rms input. R5 and C3
provide a 3 dB noise bandwidth of 30 kHz. R12 to R15 change
the scaling from 625 mV/decade at the control inputs to
1 V/decade at the output. At the same time, R12 to R15 center
the dynamic range at 60 dB, which occurs if the VG of U1B is
equal to 0. These arrangements ensure that the VLOG still fits
within the ±6 V supplies.
R14
7.32k
R15
5.11k
+6V DEC
R13
866
C1HI
A1CM
A1OP
VPOS
C1LO
A1HI
A1LO
GAT1
VNEG
A2OP
A2CM
C2HI
GAT2
A2LO
A2HI
C2LO
+6V
DEC
–6V
DEC
–6V
DEC
NC
C5
22F
+6V DEC
R11
56.2k
R10
3.16k
U3C
U3A
1/4
AD713
C2
0.1F
NC = NO CONNECT
R6
3.4k
R8
294
+6V
C1HI
A1CM
A1OP
VPOS
C1LO
A1HI
A1LO
GAT1
VNEG
A2OP
A2CM
C2HI
GAT2
A2LO
A2HI
C2LO
C4
2F
C1
0.1F
C3
0.001F
R4
133k
R5
5.36k
133k
R2
100
R1
C6
4.7F
+316.2mV
1
2
3
4
5
6
7
14
13
12
11
10
9
8
U4
AD636
FB
+6V
–6V
+6V
DEC
–6V
DEC
0.1F
POWER SUPPLY
DECOUPLING
NETWORK
U3B
1/4
AD713
1
2
3
16
15
14
4
5
6
7
8
13
12
11
10
9
REF
A1
A2
+
–
VOUT
+5V
+
–
U2 AD600
DEC
–5V
DEC
1/4
AD713
VLOG
R7
1k
R16
287
R9
1k
R17
115
R3
200
0dB
ADJUST
1
2
3
16
15
14
4
5
6
7
8
13
12
11
10
9
REF
INPUT
A1
A2
+
–
+
–
U1 AD600
R12
1k
00
53
8-
04
9
VIN
–VS
CAV
dB
BUF OUT
BUF IN
NC
+VS
COM
RL
IOUT
NC
Figure 51. 120 dB Dynamic Range RMS Responding Circuit Optimized for SNR
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