HAMAMATSU C4890 Datasheet

PHOTODIODE

PIN photodiode amplifier

C4890

Wide bandwidth amplifier (1.5 GHz, 20 dB)

C4890 wide-band amplifier, when connected to a high-speed PIN photodiode (S5791, S5972, S5973, etc.) converts optical signals at a maximum
of 1.5 GHz into voltage outputs with exceptionally low distortion and 20 dB gain.
C4890 can also be combined with other types of PIN photodiodes and APDs (avalanche photodiodes) to serve as a high-frequency amplifier for
optical measurements in a wide range of fields including industry and research applications.

Features

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Wide bandwidth, high gain, flat gain spectrum

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Flat, low group delay characteristics and low noise

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Input/output impedance: 50 Ω

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Small size, light weight, low price

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Single power supply operation (+12 V)

Absolute maximum ratings

■

Parameter Condition Value Unit

Supply voltage +13.5 V

Input voltage

Operating temperature 0 to +60 °C
Storage temperature -10 to +70 °C

■

Electrical characteristics (Ta=25 °C, Vcc=12 V, Input/output is terminated with 50 Ω load.)

Parameter Condition Min. Typ. Max. Unit

Cut-off frequency
(-3 dB)

Gain f=1.0 GHz 18 20 - dB
Gain deviation within bandwidth f=10 MHz to 1.0 GHz - ±1.0 - dB
Group delay time - 700 - ps

VSWR

1 dB compression point - 7 - dBm
Rise time - 240 - ps
Noise figure - 8 - dB
Current consumption - 45 - mA

High band 1.0 1.5 - GHz
Low band - 5 10 MHz

Input - 1.1 - dB
Output

Continuation RF input +15 dBm
DC +1.25 V

f=1.0 GHz

Applications

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High frequency amplifier for measurement

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PIN photodiode evaluation

-1.5- dB

PIN photodiode amplifier

C4890

■ Gain vs. frequency

30

20

GAIN (dB)

10

0

0 0.5 1.0 1.5

FREQUENCY (GHz)

■ Dimensional outline (unit: mm)

WARRANTY REAL

DO NOT REMOVE

OUT

7

(2 ×) SMA JACK

11 30

7

WIDEBAND AMPLIFIER

IN MAX 15dBm

No.

40

C4890

Vcc=12V GND

2.0

KACCB0038EA

■ Group delay time vs. frequency

2

1

GROUP DELAY TIME (ns)

0

0

0.5

1.0

FREQUENCY (GHz)

1.5

2.0

KACCB0039EA

20

30

(4 ×) M3 (d-5)

20

KACCA0034EA

■ Application example: High-speed O/E converter module

A high-sensitivity O/E converter can be easily configured by
using C4890 in conjunction with a high-speed PIN photodiode
(S5973, etc). The following is an example when C4890 is used
with S5973 to amplify the output signal after receiving an
attenuator. Major performance items are shown below.

Effective bandwidth: 5 MHz to 1.5 GHz

The lower limit is determined by the amplifier (C4890)
and the upper limit by the photodiode.

Conversion sensitivity (V/W) = 0.5 A/W × 50 × (100 - α)/100 × 10 (λ=850 nm)

C4890 gain

Attenuator damp rate

Attenuator input impedance

Photodiode photoelectric sensitivity

Detection limit: 4.4 µWrms (λ=850 nm, BW=1.5 GHz)

Depends on the amplifier NF (NF=8 dB Typ.).

The above specifications are typical values and not guaranteed.

■ Connection example

+12

10 k

0.1 µ

PHOTODIODE

R1R3R2

Resistance value according to the attenuator damp quantity

Damp quantity

(dB)

00050

3 30 8.2 150

6501668

10 70 27 36

ATTENUATOR

SMA SMA

Damp rate

(%)

+12

C4890

R1, R2

(Ω)

Vout

R3
(Ω)

KPINC0003EB

Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions.
Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2001 Hamamatsu Photonics K.K.

HAMAMATSU PHOTONICS K.K., Solid State Division
1126-1 Ichino-cho, Hamamatsu City, 435-8558 Japan, Telephone: [phone], Fax: [phone], http://www.hamamatsu.com

U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P.O.Box 6910, Bridgewater, N.J. 08807-0910, U.S.A., Telephone: [phone], Fax: [phone]
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: [phone], Fax: [phone]
France: Hamamatsu Photonics France S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: [phone], Fax: [phone]
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: [phone], Fax: [phone]
North Europe: Hamamatsu Photonics Norden AB: Smidesvägen 12, SE-171 41 Solna, Sweden, Telephone: [phone], Fax: [phone]
Italy: Hamamatsu Photonics Italia S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: [phone], Fax: [phone]

Cat. No. KACC1055E01
Apr. 2001 DN