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參數(shù)資料
型號: AD8370
廠商: Analog Devices, Inc.
元件分類: 運動控制電子
英文描述: LF to 750 MHz Digitally Controlled VGA
中文描述: LF到750兆赫數(shù)字控制VGA
文件頁數(shù): 1/28頁
文件大小: 1043K
代理商: AD8370
LF to 750 MHz
Digitally Controlled VGA
AD8370
FEATURES
Programmable low and high gain (<2 dB resolution)
Low range: 11 dB to +17 dB
High range: +6 dB to +34 dB
Differential input and output:
200 differential input
100 differential output
7 dB noise figure @ maximum gain
Two-tone IP3 of +35 dBm @ 70 MHz
3 dB bandwidth of 750 MHz
40 dB precision gain range
Serial 8-bit digital interface
Wide input dynamic range
Power-down feature
Single 3 V to 5 V supply
APPLICATIONS
Differential ADC drivers
IF sampling receivers
RF/IF gain stages
Cable and video applications
SAW filter interfacing
Single-ended-to-differential conversion
GENERAL DESCRIPTION
Rev.
0
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
Tel: 781.329.4700
www.analog.com
The AD8370 is a low cost, digitally controlled, variable gain
amplifier that provides precision gain control, high IP3, and low
noise figure. The excellent distortion performance and wide
bandwidth make the AD8370 a suitable gain control device for
modern receiver designs.
For wide input, dynamic range applications, the AD8370 pro-
vides two input ranges: high gain mode and low gain mode. A
vernier 7-bit transconductance (Gm) stage provides 28 dB of
gain range at better than 2 dB resolution, and 22 dB of gain
range at better than 1 dB resolution. A second gain range, 17 dB
higher than the first, can be selected to provide improved noise
performance.
The AD8370 is powered on by applying the appropriate logic
level to the PWUP pin. When powered down, the AD8370
consumes less than 4 mA and offers excellent input to output
isolation. The gain setting is preserved when operating in a
power-down mode.
FUNCTIONAL BLOCK DIAGRAM
INHI
INLO
OPHI
OPLO
VCCO
11
OCOM
ICOM
VOCM
PWUP
VCCO
6
OCOM
VCCI
3
ICOM
BIAS CELL
SHIFT REGISTER
AND LATCHES
PRE
AMP
TRANSCONDUCTANCE
OUTPUT
AMP
1
16
4
14
13
12
5
9
8
2
10
7
15
DATA CLCK LTCH
AD8370
0
Figure 1.
0
10
20
30
40
50
60
70
–30
–20
–10
0
10
20
30
40
V
V
0
10
20
30
40
60
100
50
70
80
90
110 120 130
GAIN CODE
0
CODE = LAST 7 BITS OF GAIN CODE
(NO MSB)
HIGH GAIN MODE
HIGH GAIN MODE
LOW GAIN MODE
LOW GAIN MODE
GAIN
CODE
0.409
GAIN
CODE
0.059
Figure 2. Gain vs. Gain Code at 70 MHz
Gain control of the AD8370 is through a serial 8-bit gain control
word. The MSB selects between the two gain ranges, and the
remaining 7 bits adjust the overall gain in precise linear gain steps.
Fabricated on the ADI high speed XFCB process, the high band-
width of the AD8370 provides high frequency and low distortion.
The quiescent current of the AD8370 is 78 mA typically. The
AD8370 amplifier comes in a compact, thermally enhanced
16-lead TSSOP package and operates over the temperature
range of 40°C to +85°C.
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD8370_05 制造商:AD 制造商全稱:Analog Devices 功能描述:LF to 750 MHz, Digitally Controlled VGA
AD8370ARE 制造商:Analog Devices 功能描述:SP Amp Variable Gain Amp Single 5.5V 16-Pin TSSOP EP Tube 制造商:Analog Devices 功能描述:SP AMP VARIABLE GAIN AMP SGL 5.5V 16TSSOP - Rail/Tube 制造商:Analog Devices 功能描述:IC AMP VARIABLE GAIN
AD8370ARE-REEL7 功能描述:IC AMP VGA DIFF LN 16TSSOP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)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
AD8370AREZ 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(biāo)準(zhǔn)包裝:2,500 系列:- 放大器類型:通用 電路數(shù):4 輸出類型:- 轉(zhuǎn)換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源,單路/雙路(±):3 V ~ 32 V,±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP(0.173",4.40mm 寬) 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR
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
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