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LT1993-4

更新时间： 2024-11-30 14:58:11
品牌 Logo 应用领域
亚德诺 - ADI 放大器驱动驱动器
页数 文件大小 规格书
20页 2334K
描述
900MHz、低失真、低噪声差分放大器 / ADC 驱动器 (AV = 4V/V)

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LT1993-4 数据手册

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LT1993-4  
900MHz Low Distortion, Low  
Noise Differential Amplifier/  
ADC Driver (A = 4  
V/V)  
V
FEATURES  
DESCRIPTION  
®
n
900MHz –3dB Bandwidth  
The LT 1993-4 is a low distortion, low noise Differential  
Amplifier/ADC driver for use in applications from DC to  
900MHz. The LT1993-4 has been designed for ease of  
use, with minimal support circuitry required. Exceptionally  
low input-referred noise and low distortion products  
(with either single-ended or differential inputs) make the  
LT1993-4 an excellent solution for driving high speed  
12-bit and 14-bit ADCs. In addition to the normal unfiltered  
outputs (+OUT and –OUT), the LT1993-4 has a built-in  
175MHz differential lowpass filter and an additional pair  
of filtered outputs (+OUTFILTERED, –OUTFILTERED) to  
reduce external filtering components when driving high  
speed ADCs. The output common mode voltage is easily  
n
Fixed Gain of 4V/V (12dB)  
n
Low Distortion:  
40dBm OIP3, –73dBc HD3 (70MHz 2V  
)
P-P  
51dBm OIP3, –94dBc HD3 (10MHz 2V  
)
P-P  
n
Low Noise: 14.5dB NF, e = 2.35nV/√Hz (70MHz)  
n
n
n
n
n
n
n
Differential Inputs and Outputs  
Additional Filtered Outputs  
Adjustable Output Common Mode Voltage  
DC- or AC-Coupled Operation  
Minimal Support Circuitry Required  
Small 0.75mm Tall 16-Lead 3 × 3 QFN Package  
set via the V  
pin, eliminating either an output trans-  
OCM  
APPLICATIONS  
former or AC-coupling capacitors in many applications.  
n
Differential ADC Driver for:  
The LT1993-4 is designed to meet the demanding require-  
ments of communications transceiver applications. It can  
be used as a differential ADC driver, a general-purpose  
differential gain block, or in any other application requir-  
ing differential drive. The LT1993-4 can be used in data  
acquisition systems required to function at frequencies  
down to DC.  
Imaging  
Communications  
n
Differential Driver/Receiver  
n
Single Ended to Differential Conversion  
n
Differential to Single Ended Conversion  
n
Level Shifting  
n
IF Sampling Receivers  
n
SAW Filter Interfacing/Buffering  
The LT1993-4 operates on a 5V supply and consumes  
100mA. It comes in a compact 16-lead 3 × 3 QFN package  
and operates over a –40°C to 85°C temperature range.  
All registered trademarks and trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
4-Tone WCDMA Waveform,  
LT1993-4 Driving LTC2255  
14-Bit ADC at 92.16Msps  
ADC Driver with Single-Ended to Differential Conversion  
0
32768 POINT FFT  
–10  
1:1  
0.1ꢀF  
TONE CENTER FREQUENCIES  
Z-RATIO  
70MHz  
–20  
AT 62.5MHz, 67.5MHz,  
–INB  
12.2ꢁ  
72.5MHz, 77.5MHz  
–30  
IF IN  
–OUT  
AIN–  
–INA  
LT1993-4  
–40  
–50  
–60  
–70  
–80  
–OUTFILTERED  
LTC2255  
ADC  
100ꢁ  
82nH 52.3pF  
+OUTFILTERED  
+OUT  
+INB  
AIN+  
MA/COM  
12.2ꢁ  
+INA  
0.1ꢀF  
V
OCM  
ETC1-1-13  
LTC2255 125Msps  
14-BIT ADC SAMPLING  
AT 92.16Msps  
ENABLE  
–90  
–100  
–110  
–120  
2.2V  
12dB GAIN  
19934 TA01  
0
10 15 20 25 30 35 40 45  
FREQUENCY (MHz)  
5
LT19934 TA02  
Rev B  
1
Document Feedback  
For more information www.analog.com  
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 		LT1993-4 - 900MHz Low Distortion, Low Noise Differential Amplifier/ADC Driver (AV = 4V/V);
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LT1993IUD-10#PBF Linear

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