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參數(shù)資料
| 型號： | AD8375ACPZ-R7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 5/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP VGA DIFF ULDIST 24LFCSP |
| 產(chǎn)品培訓模塊： | Differential Circuit Design Techniques for Communication Applications |
| 標準包裝： | 1 |
| 放大器類型： | 可變增益 |
| 電路數(shù)： | 1 |
| 輸出類型： | 差分 |
| 轉(zhuǎn)換速率： | 5000 V/µs |
| -3db帶寬： | 630MHz |
| 電流 - 輸入偏壓： | 900nA |
| 電流 - 電源： | 125mA |
| 電壓 - 電源，單路/雙路(±)： | 4.5 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-VFQFN 裸露焊盤，CSP |
| 供應商設備封裝： | 24-LFCSP-VQ（4x4） |
| 包裝： | 標準包裝 |
| 產(chǎn)品目錄頁面： | 775 (CN2011-ZH PDF) |
| 其它名稱： | AD8375ACPZ-R7DKR |
Data Sheet
AD8375
Rev. A | Page 13 of 24
APPLICATIONS
BASIC CONNECTIONS
Figure 35 shows the basic connections for operating the
AD8375. A voltage between 4.5 V and 5.5 V should be applied
to the supply pins. Each supply pin should be decoupled with at
least one low inductance, surface-mount ceramic capacitor of
0.1 μF placed as close as possible to the device.
The outputs of the AD8375 are open collectors that need to be
pulled up to the positive supply with 1 H RF chokes. The
differential outputs are biased to the positive supply and require
ac coupling capacitors, preferably 0.1 F. Similarly, the input
pins are at bias voltages of about 2 V above ground and should
be ac-coupled as well. The ac coupling capacitors and the RF
chokes are the principle limitations for operation at low
frequencies.
To enable the AD8375, the PWUP pin must be pulled high.
Taking PWUP low puts the AD8375 in sleep mode, reducing
current consumption to 5 mA at ambient.
SINGLE-ENDED-TO-DIFFERENTIAL CONVERSION
The AD8375 can be configured as a single-ended input to
differential output driver as shown in Figure 33. A 150 Ω
resistor in parallel with the input impedance of input pin
provides an impedance matching of 50 Ω. The voltage gain and
the bandwidth of this configuration, using a 150 Ω load,
remains the same as when using a differential input.
5
0.1F
37.5
150
AD8375
1H
150
A0 TO A4
1H
+5V
06724-
035
VCM
0.1F
50
AC
Figure 33. Single-Ended-to-Differential Conversion
Using a single-ended input decreases the power gain by 3 dB
and limits distortion cancellation. Consequently, the second-
order distortion is degraded. The third-order distortion remains
low to 200 MHz, as shown in Figure 34.
06724-
036
–60
–65
–70
–75
–80
–85
–90
–95
–100
HARM
O
NI
C
DI
S
T
O
RT
IO
N
(
d
Bc)
0
200
150
100
50
FREQUENCY (MHz)
HD2
HD3
Figure 34. Harmonic Distortion vs. Frequency of
Single-Ended-to-Differential Conversion
PARALLEL CONTROL INTERFACE
0.1F
RS
2
RS
2
AC
BALANCED
SOURCE
0.1F
+VS
RL
BALANCED
LOAD
1H
0.1F
10F
+VS
06724-
034
COMM VPOS COMM COMM COMM PWUP
19
24
23
22
21
20
A1
A0
VPOS VPOS COMM VPOS
12
7
8
9
10
11
18
17
16
15
14
13
1
2
3
4
5
6
VCOM
VIN+
VIN–
A4
A3
A2
VOUT–
VOUT+
VOUT–
VOUT+
COMM
VPOS
AD8375
Figure 35. Basic Connections
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相關代理商/技術參數(shù) |
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| AD8375ACPZ-REEL7 | 制造商:AD 制造商全稱:Analog Devices 功能描述:24dB Range, 1dB Step Size Programmable VGA |
| AD8375ACPZ-WP | 制造商:Analog Devices 功能描述:SP Amp Variable Gain Amp Single 5.5V 24-Pin LFCSP EP Tray 制造商:Analog Devices 功能描述:ULTRALOW DISTORTION IF VGA - Bulk 制造商:Analog Devices 功能描述:IF CELLULAR SINGLE DGA |
| AD8375-EVALZ | 制造商:Analog Devices 功能描述:EVAL BOARD FOR AD8375 制造商:Analog Devices 功能描述:EVALUATION BOARDS - Bulk |
| AD8376 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Ultra Low Distortion IF Dual VGA |
| AD8376_1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Ultralow Distortion IF Dual VGA |
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