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LT1993CUD-4

Description
900mhz low distortion, low noise differential amplifi er/adc driver (AV = 4V/V)
CategoryAnalog mixed-signal IC    Amplifier circuit   
File Size702KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LT1993CUD-4 Overview

900mhz low distortion, low noise differential amplifi er/adc driver (AV = 4V/V)

LT1993CUD-4 Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?incompatible
Parts packaging codeQFN
package instructionHVQCCN, LCC16,.12SQ,20
Contacts16
Manufacturer packaging codeUD
Reach Compliance Codenot_compliant
ECCN codeEAR99
Amplifier typeOPERATIONAL AMPLIFIER
Maximum average bias current (IIB)15 µA
Nominal Common Mode Rejection Ratio70 dB
Maximum input offset voltage10000 µV
JESD-30 codeS-PQCC-N16
JESD-609 codee0
length3 mm
Humidity sensitivity level1
Negative supply voltage upper limit
Nominal Negative Supply Voltage (Vsup)
Number of functions1
Number of terminals16
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeHVQCCN
Encapsulate equivalent codeLCC16,.12SQ,20
Package shapeSQUARE
Package formCHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)235
power supply5 V
Certification statusNot Qualified
Maximum seat height0.8 mm
Nominal slew rate1100 V/us
Maximum slew rate112 mA
Supply voltage upper limit5.5 V
Nominal supply voltage (Vsup)5 V
surface mountYES
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formNO LEAD
Terminal pitch0.5 mm
Terminal locationQUAD
Maximum time at peak reflow temperature20
width3 mm
Base Number Matches1
FEATURES
LT1993-4
900MHz Low Distortion, Low
Noise Differential Amplifier/
ADC Driver (A
V
= 4V/V)
DESCRIPTIO
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. Exception-
ally 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 set
via the V
OCM
pin, eliminating either an output transformer
or AC-coupling capacitors in many applications.
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.
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.
4-Tone WCDMA Waveform,
LT1993-4 Driving LTC2255
14-Bit ADC at 92.16Msps
0
–10
32768 POINT FFT
TONE CENTER FREQUENCIES
AT 62.5MHz, 67.5MHz,
72.5MHz, 77.5MHz
900MHz –3dB Bandwidth
Fixed Gain of 4V/V (12dB)
Low Distortion:
40dBm OIP3, –73dBc HD3 (70MHz 2V
P-P
)
51dBm OIP3, –94dBc HD3 (10MHz 2V
P-P
)
Low Noise: 14.5dB NF, e
n
= 2.35nV/√Hz (70MHz)
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
APPLICATIO S
Differential ADC Driver for:
Imaging
Communications
Differential Driver/Receiver
Single Ended to Differential Conversion
Differential to Single Ended Conversion
Level Shifting
IF Sampling Receivers
SAW Filter Interfacing/Buffering
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
1:1
Z-RATIO
ADC Driver with Single-Ended to Differential Conversion
0.1µF
–OUT
82nH
AMPLITUDE (dBFS)
–INB
–INA
12.2Ω
AIN–
52.3pF
LTC2255
ADC
AIN+
12.2Ω
LTC2255 125Msps
14-BIT ADC SAMPLING
AT 92.16Msps
19934 TA01
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
0
70MHz
IF IN
100Ω
MA/COM
ETC1-1-13
0.1µF
–OUTFILTERED
LT1993-4
+OUTFILTERED
+INB
+OUT
+INA
V
OCM
ENABLE
2.2V
12dB GAIN
U
U
U
5
10
15 20 25 30 35
FREQUENCY (MHz)
40
45
LT19934 TA02
19934fa
1

LT1993CUD-4 Related Products

LT1993CUD-4 LT1993IUD-4
Description 900mhz low distortion, low noise differential amplifi er/adc driver (AV = 4V/V) 900mhz low distortion, low noise differential amplifi er/adc driver (AV = 4V/V)
Brand Name Linear Technology Linear Technology
Is it Rohs certified? incompatible incompatible
Parts packaging code QFN QFN
package instruction HVQCCN, LCC16,.12SQ,20 HVQCCN, LCC16,.12SQ,20
Contacts 16 16
Manufacturer packaging code UD UD
Reach Compliance Code not_compliant not_compliant
ECCN code EAR99 EAR99
Amplifier type OPERATIONAL AMPLIFIER OPERATIONAL AMPLIFIER
Maximum average bias current (IIB) 15 µA 15 µA
Nominal Common Mode Rejection Ratio 70 dB 70 dB
Maximum input offset voltage 10000 µV 10000 µV
JESD-30 code S-PQCC-N16 S-PQCC-N16
JESD-609 code e0 e0
length 3 mm 3 mm
Humidity sensitivity level 1 1
Number of functions 1 1
Number of terminals 16 16
Maximum operating temperature 70 °C 85 °C
Package body material PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code HVQCCN HVQCCN
Encapsulate equivalent code LCC16,.12SQ,20 LCC16,.12SQ,20
Package shape SQUARE SQUARE
Package form CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius) 235 235
power supply 5 V 5 V
Certification status Not Qualified Not Qualified
Maximum seat height 0.8 mm 0.8 mm
Nominal slew rate 1100 V/us 1100 V/us
Maximum slew rate 112 mA 112 mA
Supply voltage upper limit 5.5 V 5.5 V
Nominal supply voltage (Vsup) 5 V 5 V
surface mount YES YES
Temperature level COMMERCIAL INDUSTRIAL
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb)
Terminal form NO LEAD NO LEAD
Terminal pitch 0.5 mm 0.5 mm
Terminal location QUAD QUAD
Maximum time at peak reflow temperature 20 20
width 3 mm 3 mm
Base Number Matches 1 1
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