LT6402CUD-20#TRPBF Linear Technology, LT6402CUD-20#TRPBF Datasheet

IC DIFF AMP/ADC DRVR 16-QFN

LT6402CUD-20#TRPBF

Manufacturer Part Number
LT6402CUD-20#TRPBF
Description
IC DIFF AMP/ADC DRVR 16-QFN
Manufacturer
Linear Technology
Datasheet

Specifications of LT6402CUD-20#TRPBF

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-20#TRPBFLT6402CUD-20
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LT6402CUD-20#TRPBFLT6402CUD-20#PBF
Manufacturer:
LTC
Quantity:
141
Company:
Part Number:
LT6402CUD-20#TRPBFLT6402CUD-20#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LT6402CUD-20#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
APPLICATIO S
FEATURES
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
300 MHz –3dB Bandwidth
Fixed Gain of 20dB
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
51dBm OIP3, –81dBc HD3 (20MHz, 2V
12.4dB NF, e
Imaging
Communications
IF IN
0.1µF
0.1µF
0.1µF
n
U
= 1.9nV/√Hz (20MHz)
–INB
–INA
+INB
+INA
LT6402-20
V
V
5V
CC
EE
V
OCM
+OUT
–OUT
U
0.1µF
10Ω
10Ω
P-P
AIN
AIN
)
+
LTC
V
®
CM
2249
6402 TA01a
300MHz Low Distortion, Low
Noise Differential Amplifi er/
DESCRIPTIO
The LT
amplifi er/ADC driver for use in applications from DC to
300MHz. The LT6402-20 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 LT6402-20
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 LT6402-20 has a built-in 75MHz
differential low pass fi lter and an additional pair of fi ltered
outputs (+OUTFILTERED, –OUTFILTERED) to reduce
external fi ltering components when driving high speed
ADCs. The output common mode voltage is easily set via
the V
coupling capacitors in many applications.
The LT6402-20 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 requiring
differential drive. The LT6402-20 can be used in data
acquisition systems required to function at frequencies
down to DC.
The LT6402-20 operates on a 5V supply and consumes
30mA. It comes in a compact 16-lead 3mm × 3mm QFN pack-
age and operates over a –40°C to 85°C temperature range.
OCM
®
ADC Driver (A
6402-20 is a low distortion, low noise differential
pin, eliminating an output transformer or AC-
Distortion vs Frequency, Differential
–100
–40
–50
–60
–70
–80
–90
1
U
FILTERED OUTPUTS
V
OUT
= 2V
Input, No R
P-P
FREQUENCY (MHz)
10
HD3
HD2
LOAD
LT6402-20
V
= 20dB)
64022 G08
100
640220fa
1

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LT6402CUD-20#TRPBF Summary of contents

Page 1

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

Page 2

... PLASTIC QFN T = 125°C, θ = 68°C/W, θ = 4.2°C/W JMAX JA JC EXPOSED PAD IS V (PIN 17) EE MUST BE SOLDERED TO THE PCB UD PART MARKING* LT6402CUD-20 LCBC LT6402IUD-20 LCBC http://www.linear.com/leadfree/ = 0V, ⎯ E ⎯ N ⎯ A ⎯ B ⎯ L ⎯ 0.8V, +INA = 5V EEA EEB EEC unless otherwise noted. ...

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 I Input Voltage Range, MIN VRMIN I Input Voltage Range, MAX VRMAX R Input Resistance INDIFF C ...

Page 4

LT6402-20 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- TYPICAL PERFOR A CE CHARACTERISTICS Third Order Intermodulation Distortion vs Frequency Differential Input LOAD –60 2 TONES, 2V COMPOSITE P-P 1MHz TONE SPACING –65 –70 –75 UNFILTERED OUTPUTS –80 –85 –90 –95 FILTERED OUTPUTS –100 ...

Page 7

W U TYPICAL PERFOR A CE CHARACTERISTICS Noise Figure vs Frequency MEASURED USING DC954A DEMO BOARD 5 10 100 FREQUENCY (MHz) 64022 G15 Differential Input Impedance vs Frequency 400 350 300 250 200 150 IMPEDANCE ...

Page 8

LT6402-20 TYPICAL PERFORMANCE CHARACTERISTICS Large-Signal Transient Response 3 100Ω PER OUTPUT LOAD 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 TIME (10ns/DIV) 64022 G24 Turn-On Time 4 100 LOAD PER OUTPUT 3.5 3.0 ...

Page 9

CTIO S 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 ...

Page 10

LT6402- APPLICATIO S I FOR ATIO Circuit Description The LT6402- low noise, low distortion differential amplifi er/ADC driver with: • –3dB bandwidth DC to 300MHz • Fixed gain independent of R LOAD 10V/V (20dB) • Differential ...

Page 11

U U APPLICATIO S I FOR ATIO Single-Ended to Differential Operation The LT6402-20’s performance with single-ended inputs is comparable to its performance with differential inputs. This excellent single-ended performance is largely due to the internal topology of the LT6402-20. Referring ...

Page 12

LT6402- APPLICATIO S I FOR ATIO Filtered Applications (Using the +OUTFILTERED and –OUTFILTERED Pins) Filtering at the output of the LT6402-20 is often desired to provide either anti-aliasing or improved signal to noise ratio. To simplify this fi ...

Page 13

U U APPLICATIO S I FOR ATIO solution of 14pF from each fi ltered output to ground plus a 14pF capacitor between the fi ltered outputs would also halve the fi lter bandwidth (Figure 7). Bandpass fi ltering is also ...

Page 14

LT6402-20 U TYPICAL APPLICATIO 14 Top Silkscreen 640220fa ...

Page 15

... SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION 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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights Package 16-Lead Plastic QFN (3mm × ...

Page 16

... TCM 4-19 75Ω R13 C16 C22 [1] 0.1µF [ 4:1 TEST OUT 3 4 C20, 0.1µ MINI CIRCUITS TCM 4-19 6402 TA02 = 3.8nV/√Hz at 20MHz, 150mV n = 2.6nV/√Hz at 20MHz, 150mV n LT 0706 • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2005 J4 –OUT J5 +OUT 640220fa ...

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