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| 型號： | AD600JNZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 15/33頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP VGA DUAL LN 50MA 16DIP |
| 標(biāo)準(zhǔn)包裝： | 25 |
| 系列： | X-AMP® |
| 放大器類型： | 可變增益 |
| 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： | 通孔 |
| 封裝/外殼： | 16-DIP（0.300"，7.62mm） |
| 供應(yīng)商設(shè)備封裝： | 16-PDIP |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 774 (CN2011-ZH PDF) |
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AD600/AD602
Rev. F | Page 21
–5
–4
of 32
This system can, of course, be used as an AGC amplifier in
which the rms value of the input is leveled. Figure 43 shows the
decibel output voltage. More revealing is Figure 44, which
shows that the deviation from the ideal output predicted by
Equation 1 over the input range 80 μV to 500 mV rms is within
±0.5 dB, and within ±1 dB for the 80 dB range from 80 μV to
800 mV. By suitable choice of the input attenuator, R1 + R2, this
can be centered to cover any range from a low of 25 mV to
250 mV to a high of 1 mV to 10 V, with appropriate correction
to the value of VREF. Note that VSCALE is not affected by the
changes in the range. The gain ripple of ±0.2 dB seen in this
curve is the result of the finite interpolation error of the
X-AMP. Note that it occurs with a periodicity of 12 dB, twice
the separation between the tap points (because of the two
cascaded stages).
5
0
1
2
3
4
–3
–2
–1
10
100
10
1
100m
10m
1m
INPUT SIGNAL (V rms)
2.5
0
0.5
1.0
1.5
2.0
–1.5
–1.0
–0.5
OU
TP
U
T
E
R
V
OU
T
(V
)
00
53
8-
0
41
–2.5
–2.0
Figure 43. The Decibel Output of the Circuit in Figure 41 Is Linear over an
80 dB Range
R
OR
(
d
B
)
10
100
10
1
100m
10m
1m
INPUT SIGNAL (V rms)
00
53
8-
0
4
2
Figure 44. Data from Figure 42 Presented as the Deviation
from the Ideal Output Given in Equation 4
This ripple can be canceled whenever the X-AMP stages are
cascaded by introducing a 3 dB offset between the two pairs of
control voltages. A simple means to achieve this is shown in
Figure 45: the voltages at C1HI and C2HI are split by ±46.875 mV,
or ±1.5 dB. Alternatively, either one of these pins can be offset
by 3 dB and a 1.5 dB gain adjustment made at the input
attenuator (R1 + R2).
16
15
14
13
12
11
10
9
U1
AD600
C1HI
A1CM
A1OP
VPOS
VNEG
A2OP
A2CM
C2HI
1
2
3
4
5
6
7
VIN
–VS
CAV
dB
BUF OUT
BUF IN
U2
+6V DEC
–6V DEC
C2
2F
AD636
NC
–6V DEC
–46.875mV
NC = NO CONNECT
10k
10k
+6V
DEC
–6V
DEC
78.7
78.7
3dB OFFSET
MODIFICATION
+46.875mV
00
53
8-
0
43
2.5
0
–2.5
0.5
1.0
1.5
2.0
–2.0
–1.5
–1.0
–0.5
O
UT
P
UT
E
R
O
R
(
d
B)
10
100
10
1
100m
10m
1m
INPUT SIGNAL (V rms)
Figure 45. Reducing the Gain Error Ripple
The error curve shown in Figure 46 demonstrates that, over the
central portion of the range, the output voltage can be maintained
close to the ideal value. The penalty for this modification is
higher errors at the extremities of the range. The next two
applications show how three amplifier sections can be cascaded
to extend the nominal conversion range to 120 dB, with the
inclusion of simple LP filters of the type shown in Figure 37.
Very low errors can then be maintained over a 100 dB range.
00
53
8-
0
44
Figure 46. Using a 3 dB Offset Network Reduces Ripple
100 dB TO 120 dB RMS RESPONDING CONSTANT
BANDWIDTH AGC SYSTEMS WITH HIGH
ACCURACY DECIBEL OUTPUTS
The next two applications double as both AGC amplifiers and
measurement systems. In both, precise gain offsets are used to
achieve either a high gain linearity of ±0.1 dB over the full
100 dB range or the optimal SNR at any gain.
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| AD600JR | 功能描述:IC AMP VGA DUAL LN 50MA 16SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 標(biāo)準(zhǔn)包裝:2,500 系列:Excalibur™ 放大器類型:J-FET 電路數(shù):1 輸出類型:- 轉(zhuǎn)換速率:45 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:20pA 電壓 - 輸入偏移:490µV 電流 - 電源:1.7mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOIC 包裝:帶卷 (TR) |
| AD600JR-REEL | 功能描述:IC AMP VGA DUAL LN 50MA 16SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 標(biāo)準(zhǔn)包裝:2,500 系列:Excalibur™ 放大器類型:J-FET 電路數(shù):1 輸出類型:- 轉(zhuǎn)換速率:45 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:20pA 電壓 - 輸入偏移:490µV 電流 - 電源:1.7mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOIC 包裝:帶卷 (TR) |
| AD600JR-REEL7 | 功能描述:IC AMP VGA DUAL LN 50MA 16SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 標(biāo)準(zhǔn)包裝:2,500 系列:Excalibur™ 放大器類型:J-FET 電路數(shù):1 輸出類型:- 轉(zhuǎn)換速率:45 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:20pA 電壓 - 輸入偏移:490µV 電流 - 電源:1.7mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOIC 包裝:帶卷 (TR) |
| AD600JRZ | 功能描述:IC AMP VGA DUAL LN 50MA 16SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:X-AMP® 標(biāo)準(zhǔn)包裝:2,500 系列:Excalibur™ 放大器類型:J-FET 電路數(shù):1 輸出類型:- 轉(zhuǎn)換速率:45 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:20pA 電壓 - 輸入偏移:490µV 電流 - 電源:1.7mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):4.5 V ~ 38 V，±2.25 V ~ 19 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:8-SOIC 包裝:帶卷 (TR) |
| AD600JRZ | 制造商:Analog Devices 功能描述:IC, VARIABLE GAIN AMP, 35MHZ, 1DB SOIC16 |
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