Euvis

Differential Limiting Amplifier, LA310Z

High-Speed Data Communication
LA310Z – 8.3 GHz Differential Limiting Amplifier
16-pin Plastic QFN Package
PRODUCT DESCRIPTION
The LA310Z is an ultra-broadband fully differential limiting amplifier designed for highspeed wide-band communication applications up to 10 Gb/s. The amplifier has an
excellent input sensitivity of 2.5 mVpp and a small-signal bandwidth of 8.3 GHz. Its
wide bandwidth and high sensitivity ensure a low bit error rate in high-speed datacommunication. The device features 100-Ω differential impedances at both the inputs andoutputs. Its lost-of-signal detector can warn the receiver as the incoming signal is too
small for a certain bit error rate. The device can be used as an input sensing amplifier, a
repeater, and a wide-band single-ended-to-differential converter.

KEY FEATURES• 39-dB differential gain
• 8.3 GHz bandwidth• < 2.5 mVpp single-ended/differential input sensitivity• Differential 100-Ω inputs and outputs• 750m-Vpp maximum differential output swing• Lost-of-Signal (LOS) detector• Output waveform envelope detector• Output waveform crossing control• Power consumption: 0.3 W with +5 V single power supply

BLOCK DIAGRAM

VREF

LOS
ENVP
EnvelopeDetector

IPOPDriverIN
CC

Rev. (none), 1/10/07

ON
Crossing
Control1EuvisDifferential Limiting Amplifier, LA310Z

ELECTRICAL SPECIFICATIONS
Testing Condition: VCC = 5 V

Parameter

SymbolMin

TypicalMax

Unit

Operating TemperatureTo−402585oSmall-Signal Max Gain1Go,max

39dB

Small-Signal 3-dB Bandwidthf3dB,max

8.3

GHz750mVpp

Output Swing1 (RL=50Ω)

CDiff. Input Return Loss2

RLI

10dBDiff. Output Return Loss2

RLO

12dB3

Tr30

psOutput Fall Time3Tf25

ps0%

1.4

psVsen2.5mVpp

Voff5mV

Output Rise Time

Output Overshoot4

Output Jitter, RMS
5

Sensitivity

Output DC Offset

6

Positive VCC supply Voltage

VCC

4.5

55.5

V

Positive VCC supply Current

Itotal50

6370mA1

differential I/O
2
DC to f3dB
320%~80%4for Input 500 mVpp,single ended
5
where bit error rate < 10–12 with 231-1 pseudo-random data
6measured with zero inputs

Rev. (none), 1/10/07

2

EuvisDifferential Limiting Amplifier, LA310ZTERMINAL DESCRIPTION
I/O

Name

Function

VEEGround

DCVCC

Power, +5 V

DCIPData Input+

IN

Data Input−

CC

Output Crossing Control

OP

Output +ON

Output −LOS

Lost-Of-Signal Detector

VCS

VCS Generator Bypass

ENVP
VREF

Rev. (none), 1/10/07

Signal

I
I

RFI
O

DCOO

RFRF

RFDC
DC

Output Swing EnvelopeOO

Reference Voltage for LOS

IDC

DC3

EuvisDifferential Limiting Amplifier, LA310ZPIN ARRANGEMENTS AND PACKAGE INFORMATION• Unit: mm• Package Format: 16-pin QFN• Package Size: 3 mm x 3 mm
• Pin Pitch: 0.5 mm

1Pin1VEE

2IP

3VEE

4IN

16151413LOS

VREF

ENVP

VCC

Top View

VCS

CC

VCC

VEE

EUVIS
310Z
5678VEE

12OP

11VEE

10ON

9MetalLead

30.025

Seating
Plane

30.5

1.45

1.45

0.4

0.23
0.9

Bottom View
Rev. (none), 1/10/07

Side View
4

EuvisDifferential Limiting Amplifier, LA310Z

TYPICAL CONNECTION
Reference Output
Voltage Envelope
VCC

R1C2C3C4ENVP

VREF

LOS

C1

VCC

Lost-of-Signal
Detector

Pin1
VEE

VEE

EUVIS
310Z

CB2IP

RFInputs

T2VEE
T1
CB1CB3CB4ONT4VEE

VCC

CC

RFOutputs

VEE

IN
VCS

T3OP

VCC
C7C8VR1

C5C6Notes:
VCC is +5 V
VEE’s are connected to power supply and package ground
Center pad of package is connected to groundT1 and T2: 100-Ω differential transmission lines
T3 and T4: 50-Ω single-ended transmission lines or 100-Ω differential transmission lines
VR1: 50-kΩ potentiometer
R1: 1-kΩ surface-mount resistor
C1 ~ C5 and C8: 100-nF surface-mount capacitors
C7: 100-pF surface-mount capacitor
C6: 10-µF capacitor
CB1 ~ CB4: 100-nF by-pass surface-mount capacitors

Rev. (none), 1/10/07

5EuvisDifferential Limiting Amplifier, LA310Z

Euvis
Ordering Information:
Email to: Sales@euvis.com
Or call: (805) 583-9888 x108 Sales Department
Or fax: (805) 583-9889
The information contained in this document is based on simulation results. Characteristic data and otherspecifications are subject to change without notice. Customers are advised to confirm information in thisadvanced datasheet prior to using this information or placing the order.
Euvis Inc. does not assume any liability arising from the application or use of any product or circuitdescribed herein, neither does it convey any license under its patents or any other rights.

Rev. (none), 1/10/07

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