- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄6030 > AD8370AREZ (Analog Devices Inc)IC AMP VGA DIFF LN 16TSSOP PDF資料下載
參數(shù)資料
| 型號： | AD8370AREZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 9/28頁 |
| 文件大小： | 0K |
| 描述： | IC AMP VGA DIFF LN 16TSSOP |
| 產(chǎn)品培訓(xùn)模塊： | Differential Circuit Design Techniques for Communication Applications |
| 標準包裝： | 96 |
| 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： | 5750 V/ns |
| -3db帶寬： | 750MHz |
| 電流 - 輸入偏壓： | 400pA |
| 電流 - 電源： | 79mA |
| 電壓 - 電源，單路/雙路(±)： | 3 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-TSSOP（0.173"，4.40mm）裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 16-TSSOP-EP |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 775 (CN2011-ZH PDF) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁當前第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
Data Sheet
AD8370
Rev. B | Page 17 of 28
The AD8370 contains both digital and analog sections. Care
should be taken to ensure that the digital and analog sections
are adequately isolated on the PC board. The use of separate
ground planes for each section connected at only one point via
a ferrite bead inductor ensures that the digital pulses do not
adversely affect the analog section of the AD8370.
Due to the nature of the AD8370’s circuit design, care must be
taken to minimize parasitic capacitance on the input and output.
The AD8370 could become unstable with more than a few pF of
shunt capacitance on each input. Using resistors in series with
input pins is recommended under conditions of high source
capacitance.
High transient and noise levels on the power supply, ground,
and digital inputs can, under some circumstances, reprogram the
AD8370 to an unintended gain code. This further reinforces the
need for proper supply bypassing and decoupling. The user
should also be aware that probing the AD8370 and associated
circuitry during circuit debug may also induce the same effect.
PACKAGE CONSIDERATIONS
The package of the AD8370 is a compact, thermally enhanced
TSSOP 16-lead design. A large exposed paddle on the bottom of
the device provides both a thermal benefit and a low inductance
path to ground for the circuit. To make proper use of this pack-
aging feature, the PCB needs to make contact directly under the
device, connected to an ac/dc common ground reference with
as many vias as possible to lower the inductance and thermal
impedance.
SINGLE-ENDED-TO-DIFFERENTIAL CONVERSION
AD8370
INHI
ICOM
VCCI
PWUP
VOCM
VCCO
OCOM
OPHI
OPLO
OCOM
VCCO
LTCH
CLCK
DATA
ICOM
INLO
6
7
8
2
3
5
1
11
10
9
15
14
16
13
12
4
SERIAL CONTROL
INTERFACE
0.1
F
1nF
0.1
F
+VS
CAC
RL
SINGLE-
ENDED
SOURCE
RS
03692-045
Figure 47. Single-Ended-to-Differential Conversion
The AD8370 is primarily designed for differential signal inter-
facing. The device can be used for single-ended-to-differential
conversion simply by terminating the unused input to ground
using a capacitor as depicted in Figure 47. The ac coupling
capacitors should be selected such that their reactance is
negligible at the frequency of operation. For example, using
1 nF capacitors for CAC presents a capacitive reactance of
j1.6 on each input node at 100 MHz. This attenuates the
applied input voltage by 0.003 dB. If 10 pF capacitors had been
selected, the voltage delivered to the input would be reduced
by 2.1 dB when operating with a 200 source impedance.
DIFFERENTIAL
BALANCE
(dB)
–1.0
0
–0.5
0.5
0
100
200
300
400
500
FREQUENCY (MHz)
03692-046
HIGH GAIN MODE
(GAIN CODE HG255)
LOW GAIN MODE
(GAIN CODE LG127)
Figure 48. Differential Output Balance for a Single-Ended Input Drive at
Maximum Gain (RL = 1 k, CAC = 10 nF)
Figure 48 illustrates the differential balance at the output for a
single-ended input drive for multiple gain codes. The differential
balance is better than 0.5 dB for signal frequencies less than
250 MHz. Figure 49 depicts the differential balance over the
entire gain range at 10 MHz. The balance is degraded for lower
gain settings because the finite common gain allows some of the
input signal applied to INHI to pass directly through to the
OPLO pin. At higher gain settings, the differential gain dominates
and balance is restored.
0
0.1
0.2
0.3
0.4
0.5
0.6
DIFFERENTIAL
BALANCE
(dB)
0
96
32
64
0
32
64
96
128
GAIN CODE
03692-047
LOW GAIN MODE
HIGH GAIN MODE
Figure 49. Differential Output Balance at 10 MHz for a Single-Ended Drive vs.
Gain Code (RL = 1 k, CAC = 10 nF)
Even though the amplifier is no longer being driven in a balanced
manner, the distortion performance remains adequate for most
applications. Figure 50 illustrates the harmonic distortion
performance of the circuit in Figure 47 over the entire gain range.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1352IS8#PBF | IC OP AMP DUAL HI SPD 3MHZ 8SOIC |
| AD8625ARUZ | IC OPAMP JFET 5MHZ QUAD 14TSSOP |
| 4-103327-0-26 | CONN HEADR BRKWAY .100 26POS STR |
| AD8625ARZ | IC OPAMP JFET 5MHZ QUAD 14SOIC |
| AD8024ARZ | IC OPAMP CF QUAD LP 50MA 16SOIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8370AREZ | 制造商:Analog Devices 功能描述:IC VARIABLE GAIN AMP 750MHZ TSSOP-16 制造商:Analog Devices 功能描述:IC, VARIABLE GAIN AMP, 750MHZ, TSSOP-16 |
| AD8370AREZ1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:LF to 750 MHz, Digitally Controlled VGA |
| AD8370AREZ-RL7 | 功能描述:IC AMP VGA DIFF LN 16TSSOP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:150 系列:- 放大器類型:音頻 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:5 V/µs 增益帶寬積:12MHz -3db帶寬:- 電流 - 輸入偏壓:100nA 電壓 - 輸入偏移:500µV 電流 - 電源:6mA 電流 - 輸出 / 通道:50mA 電壓 - 電源，單路/雙路(±):4 V ~ 32 V，±2 V ~ 16 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:8-TSSOP 包裝:管件 |
| AD8370-EVAL | 制造商:Analog Devices 功能描述:AD8370 EVAL BOARD - Bulk |
| AD8370-EVALZ | 制造商:Analog Devices 功能描述:- Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。