LT6402CUD-6#PBF Linear Technology, LT6402CUD-6#PBF Datasheet

IC DIFF AMP/ADC DVR 6DB 16-QFN

LT6402CUD-6#PBF

Manufacturer Part Number
LT6402CUD-6#PBF
Description
IC DIFF AMP/ADC DVR 6DB 16-QFN
Manufacturer
Linear Technology
Datasheet

Specifications of LT6402CUD-6#PBF

Amplifier Type
Differential
Number Of Circuits
2
Output Type
Differential
Slew Rate
400 V/µs
-3db Bandwidth
300MHz
Current - Input Bias
5µA
Voltage - Input Offset
1000µV
Current - Supply
30mA
Current - Output / Channel
35mA
Voltage - Supply, Single/dual (±)
4 V ~ 5.5 V, ±2 V ~ 2.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
16-WQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Gain Bandwidth Product
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LT6402CUD-6#PBFLT6402CUD-6
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LT6402CUD-6#PBF
Manufacturer:
LT
Quantity:
310
Company:
Part Number:
LT6402CUD-6#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LT6402CUD-6#PBFLT6402CUD-6#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LT6402CUD-6#PBFLT6402CUD-6/I
Manufacturer:
LT
Quantity:
310
FEATURES
APPLICATIONS
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TYPICAL APPLICATION
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
300 MHz –3dB Bandwidth
Fixed Gain of 6dB
Low Distortion:
Low Noise:
Differential Inputs and Outputs
Additional Filtered Outputs
Adjustable Output Common Mode Voltage
DC- or AC-Coupled Operation
Minimal Support Circuitry Required
Small 0.75mm Profi le 16-Lead 3mm × 3mm QFN
Package
Differential ADC Driver for:
Differential Driver/Receiver
Single Ended to Differential Conversion
Differential to Single Ended Conversion
Level Shifting
IF Sampling Receivers
SAW Filter Interfacing/Buffering
IF IN
49dBm OIP3, –85dBc HD3 (20MHz, 2V
18.6dB NF , e
Imaging
Communications
0.1μF
0.1μF
0.1μF
–INB
–INA
+INB
+INA
n
V
V
LT6402-6
5V
CC
EE
= 3.8nV/√Hz (20MHz)
V
OCM
+OUT
–OUT
0.1μF
10Ω
10Ω
AIN
AIN
+
LTC
P-P
V
®
CM
2249
)
64026 TA01a
300MHz Low Distortion, Low
Noise Differential Amplifi er/
DESCRIPTION
The LT
amplifi er/ADC driver for use in applications from DC to
300MHz. The LT6402-6 has been designed for ease of
use, with minimal support circuitry required. Exceptionally
low input-referred noise and low distortion (with either
single-ended or differential inputs) make the LT6402-6 an
excellent solution for driving high speed 12-bit and 14-bit
ADCs. In addition to the normal unfi ltered outputs (+OUT
and –OUT), the LT6402-6 has a built-in 75MHz differential
low pass fi lter and an additional pair of fi ltered outputs
(+OUTFILTERED, –OUTFILTERED) to reduce external fi l-
tering components when driving high speed ADCs. The
output common mode voltage is easily set via the V
pin, eliminating an output transformer or AC-coupling
capacitors in many applications.
The LT6402-6 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 other applications requir-
ing differential drive. The LT6402-6 can be used in data
acquisition systems required to function at frequencies
down to DC.
The LT6402-6 operates on a 5V supply and consumes 30mA.
It comes in a compact 16-lead 3mm × 3mm QFN package
and operates over a –40°C to 85°C temperature range.
Distortion vs Frequency, Differential Input, No R
®
6402-6 is a low distortion, low noise differential
ADC Driver (A
–100
–40
–50
–60
–70
–80
–90
1
FILTERED OUTPUTS
V
OUT
= 2V
P-P
FREQUENCY (MHz)
HD3
HD2
10
64026 TA01b
LT6402-6
V
100
= 6dB)
LOAD
64026fa
OCM
1

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LT6402CUD-6#PBF Summary of contents

Page 1

... Single Ended to Differential Conversion n Differential to Single Ended Conversion n Level Shifting n IF Sampling Receivers n SAW Filter Interfacing/Buffering L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION 5V 0.1μF 0.1μF –INB V CC – ...

Page 2

... Operating Temperature Range (Note 3).... –40°C to 85°C Specifi ed Temperature Range (Note 4) .... –40°C to 85°C Storage Temperature Range ................... –65°C to 125°C Junction Temperature ........................................... 125°C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LT6402CUD-6#PBF LT6402CUD-6#TRPBF LT6402IUD-6#PBF LT6402IUD-6#TRPBF LEAD BASED FINISH TAPE AND REEL LT6402CUD-6 ...

Page 3

DC ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T shorted to +INB (+IN), –INA shorted to –INB (–IN), V SYMBOL PARAMETER TCV Input Offset Voltage Drift OS I Input Voltage Range, MIN VRMIN I Input Voltage Range, MAX ...

Page 4

LT6402-6 AC ELECTRICAL CHARACTERISTICS ⎯ E ⎯ N ⎯ A ⎯ B ⎯ L ⎯ 0.8V, +INA shorted to +INB (+IN), –INA shorted to –INB (–IN), V unless otherwise noted. SYMBOL PARAMETER Input/Output Characteristics –3dBBW –3dB Bandwidth 0.1dBBW ...

Page 5

AC ELECTRICAL CHARACTERISTICS ⎯ E ⎯ N ⎯ A ⎯ B ⎯ L ⎯ 0.8V, +INA shorted to +INB (+IN), –INA shorted to –INB (–IN), V unless otherwise noted. SYMBOL PARAMETER 25MHz Signal Second/Third Harmonic Distortion Third-Order IMD ...

Page 6

LT6402-6 TYPICAL PERFORMANCE CHARACTERISTICS Third Order Intermodulation Distortion vs Frequency, Differential Input LOAD –45 2 TONES 2V COMPOSITE P-P –55 1MHz TONE SPACING UNFILTERED –65 OUTPUTS –75 FILTERED –85 OUTPUTS –95 –105 ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS Noise Figure vs Frequency 40 MEASURED USING DC954 DEMO BOARD 100 1000 FREQUENCY (MHz) 64026 G13 Differential Input Impedance vs Frequency 500 400 300 IMPEDANCE MAGNITUDE 200 100 IMPEDANCE PHASE ...

Page 8

LT6402-6 TYPICAL PERFORMANCE CHARACTERISTICS Overdrive Recovery Time 4.0 +OUT 3.5 3.0 2 100Ω LOAD 2.0 PER OUTPUT 1.5 1.0 –OUT 0.5 0 TIME (25ns/DIV) 64026 G22 Turn-Off Time 4 100Ω PER OUTPUT LOAD 3.5 3.0 +OUT ...

Page 9

PIN FUNCTIONS V (Pin 2): This pin sets the output common mode OCM voltage. Without additional biasing, both inputs bias to this voltage as well. This input is high impedance (Pins 3, 10, 1): Positive ...

Page 10

LT6402-6 BLOCK DIAGRAM –INA 200Ω 14 –INB 200Ω 13 200Ω 200Ω +INA 200Ω 16 +INB 200Ω CCA APPLICATIONS INFORMATION Circuit Description The LT6402 low noise, low distortion differential amplifi er/ADC driver with: • –3dB bandwidth ...

Page 11

APPLICATIONS INFORMATION The LT6402-6 has been designed to minimize the need for external support components such as transformers or AC-coupling capacitors ADC driver, the LT6402-6 requires no external components except for power-supply bypass capacitors. This allows DC-coupled operation ...

Page 12

LT6402-6 APPLICATIONS INFORMATION high impedance inputs of these differential ADCs. If the fi ltered outputs are used, then cutoff frequency and the type of fi lter can be tailored for the specifi c application if needed. Wideband Applications (Using the ...

Page 13

APPLICATIONS INFORMATION can also be used, but since it is being driven differentially it will appear at each fi ltered output as a single-ended capacitance of twice the value. To halve the fi lter band- width, for example, two 42pF ...

Page 14

LT6402-6 APPLICATIONS INFORMATION Large Output Voltage Swings The LT6402-6 has been designed to provide the 3.2V output swing needed by the LTC1748 family of 14-bit low-noise ADCs. This additional output swing improves system SNR 4dB. Input Bias ...

Page 15

... ON THE TOP AND BOTTOM OF PACKAGE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. UD Package 16-Lead Plastic QFN (3mm × ...

Page 16

... C16 C22 R13 [1] 0.1μF [ 4:1 TEST OUT 4 3 C20, 0.1μ MINI CIRCUITS TCM 4-19 64026 TA02 = 2.6nV/√Hz at 20MHz, 150mW n = 1.9nV/√Hz at 20MHz, 150mW n LT 1007 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2006 J4 –OUT J5 +OUT 64026fa ...

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