CPF233AL
Front Monitor OEIC for 3-wavelength laser

１． Product Overview
CPF233AL is front monitor OEIC developed in order to control the laser power of the optical pickup for
BD/DVD/CD by one IC.
For serial interface are equipped,CPF233AL is possible to select four gain switching mode(rough adjustment)
and±4.7dB gain adjustment (fine adjustment).
Also,CPF233AL is no need variable resistance of gain adjustment , so it can be cut number of components.
Since CPF233AL is builds high-speed amplifier and the PIN photo diode, output impedance is low and obtainthe stable output.
By adoption of the COB-8PIN(2.4mm×2mm)package, it is best for small and a thin shape pickup.

２． Features






BD×8～×10 DVD-R/RW×16 CD-R/RW×48
Gain Adjustment by serial data
Four gain switching mode （Gain Step 7dB）
±4.7dB Gain Adjustment （number of gain steps 64）
OUTP,OUTN Output reference voltage switching mode by serial data 1.9/2.1/2.3/2.5[V]Sleep function by serial data
Frequency characteristic：160[MHz]High-speed amplifier built-in Tr/Tf：3ns
Small, a thin shape package（2.4mm×2mm LCOB-8PIN）
The special resin for preventing interference of light is adopted
Solder re_flowing permitted

３． Maximum ratings

Item

SymbolRatings

Unit

Supply voltage

VCC

6.0V

Power dissipation

Pd240mW

Operation temperatureTopr-20～70℃

Storage temperature

Tstg-40～85℃

Terminal input voltage

Vimax

GND-0.3～Vcc+0.3

V

Item

SymbolRatings

Unit

Supply voltage

VCC

5.0±0.5

V

４． Recommended operating conditions

Note： This document may be changed without prior notice. Please check the latest document for examination.

DS0207-10E 2021/6/211YITOA MICRO TECHNOLOGY CORPORATION

CPF233AL

BD/DVD/CD Differential FMD

５． Block diagram

ENDS0207-10E 2021/6/21

2

YITOA MICRO TECHNOLOGY CORPORATION

CPF233AL

BD/DVD/CD Differential FMD

６． Pin functions , Equivalent circuit

Terminal

Terminal

No

Sign

I/O

Terminal Function

Equivalent Circuit
VCC 88VCC－

Power supply terminal

1GND－

Ground terminal

GND 1

VCC 8Internal
3.3V

2ENI

Serial interface

EN 2

Data Enable input terminal
50k
GND 1
VCC 8Internal
3.3V

Serial interface
3DATA

I/O

DATA 3Data input and output terminal

GND 1

VCC 8Internal
3.3V

4CLKI

Serial interface

CLK 4Clock input terminal
50k
GND 15NC－NC pin

－
8 VCC

6OUTN

7OUTP

O

Negative output terminal
Positive output terminal

206 OUTN
7 OUTP

1 GND

DS0207-10E 2021/6/21

3YITOA MICRO TECHNOLOGY CORPORATION

CPF233AL

BD/DVD/CD Differential FMD

７． Serial interface
７．１ Timing chart

７．１．１ Timing chart of Write modeEN
CLKDATA

A7A6A5W

A4A3A2A1A0

D7D6D5

D4Address

D3D2D1D0Data

Each function settings changes at the falling edge of EN.

.

７．１．２ Timing chart of Read modeENCLKDATA(HOST)

A7RDATA(CPF233AL)

A6A5A4A3A2

A1A0

Hi-ZAddress(From Host)
D7Hi-Z

D6D5D4D3D2D1

D0

Data Output(From CPF233AL)

DS0207-10E 2021/6/21

4YITOA MICRO TECHNOLOGY CORPORATION

CPF233AL

BD/DVD/CD Differential FMD

７．２ Data Format
A7 ： Read，Write Serect Bit 0：Write 1：Read
A6 to A0 ： Address Bit (A6：MSB，A0：LSB)

D7 to D0 ： Data Bit (D7：MSB，D0：LSB)

７．３ Address map
Address（A6-A0）

Function71h［Gsel］ IV_Amp Gain Select72h[Vsel] OUTP,OUTN VREF Select[Gadj] Gain_Adjustment_Amp Gain Set up[Sleep] Sleep Mode Select
７．４ Bit map
７．４．１ Address 71h
D7

D6

D5

D4

D3

D2

D1

D0

Gsel1

Gsel0

Gadj5

Gadj4

Gadj3

Gadj2

Gadj1

Gadj0

D7-D6 IV_Amp Gain Select [Gsel]
D7

D6

IV_Amp Gain Select00

HH ( +21dB )

01

HL ( +14dB )

10

LH ( +7dB )

11

LL ( +0dB )D5-D0 Gain_Adjustment_Amp Set up [Gadj]
D5

D4

D3

D2

D1

D0000000

Gain_Adjustment_Amp Gain
+4.7dB・・・・・・・

1010000dB

111111-4.7dB・・・・・・・

７．４．２ Address 72h
D7

D6

D5

D4

D3

D2

D1

D0－－－－－Vsel1

Vsel0Sleep

D2-D1 OUTP,OUTN VREF Select [Vsel]
D2

D1002.5V

OUTP,OUTN VREF

012.3V

102.1V

111.9V

D0 Sleep Mode Select [Sleep]
D0Mode0Active

1Sleep（OUTP,OUTN become high impedance）

DS0207-10E 2021/6/21

5YITOA MICRO TECHNOLOGY CORPORATION

CPF233AL

BD/DVD/CD Differential FMD

DC Sensitivity[mV/uW]

７．５ Set up DC Sensitivity

24232221201918171615141312111098765432100IV Gain SelectD7,D6 HH

IV Gain SelectD7,D6 HL

IV Gain SelectD7,D6 LL

IV Gain SelectD7,D6 LH64
λ=650nm,780nm

λ=405nm63
128±4.7dB
127

192 D5-D0 64step
191
255064128192

256

DATA setup D7 - D0 （decimal number）

７．６ Operating precautions
Because this IC can be in sleep condition at power-on,
be sure to set registers to cancel sleep condition.
In case that gain is set to low sensitivity, it may cause damage to laser.
To avoid this, set gain and output reference voltage with registers before turning on laser

DS0207-10E 2021/6/21

6

YITOA MICRO TECHNOLOGY CORPORATION

CPF233AL

BD/DVD/CD Differential FMD

８．Electricity and optical characteristic
Measurement condition：VCC=5.0V, Ta=25℃, RL=10kΩ, CL=10pF
Optical input: semiconductor laser. Position of optical input：Center of PD

Size of optical input：200umφ

８．１ IV Amp，Gain Adjustment Amp
Gain
Adjustment
Amp GainSymbolIV_AmpGain

Consumption current

ICC

HH
HL
LH
LL

0dB

Sleep mode
Consumption current

ICCS－－Item

OUTP,OUTN
Output reference
voltage

VREF

LL～
HH

VRE
F

2.1－

+4.7dB
0dB-4.7dB+4.7dB
0dB-4.7dB+4.7dB
0dB-4.7dB+4.7dB
0dB-4.7dB
0dB,-4.7dB+4.7dB
0dB,-4.7dB+4.7dB
0dB,-4.7dB+4.7dB
0dB,-4.7dB+4.7dB

Optical Input Condition

MINTYPMAX

Unit

No input optical power-25%-25%-25%-25%

19.9
17.7
17.2
16.9

+25%+25%+25%+25%mA

No input optical power--1.6mA

2.41

2.50

2.59

2.21

2.30

2.39

2.5

2.3
No input optical power
GND reference

V

2.1

2.01

2.10

2.19

1.9

1.81

1.90

1.99

1.9
2.1
2.3
2.5
1.9
2.1
2.3
2.5

-15
-25-20-30-60-100-60-100

00000000

1525
2030
60
10060
100

OUTP – OUTN
Offset Voltage

DVOF

LL～HH

OUTP - OUTNOffset Voltage
Temperature Drift ＊1

TVOF

LL～
HHFC

LL～
HH+4.7dB
0dB-4.7dB－

λ=405nm1MHz reference –3dB

110

160-MHzFC

LL+4.7dB
0dB-4.7dB－

λ=650,780nm
1MHz reference –3dB

80

120-

MHz

Tr

LL～－

34ns

Tf

HH－

4.5

6.5

ns

OUTP – OUTN
Frequency
characteristic（405nm） ＊1
OUTP – OUTN
Frequency
characteristic（650,780nm） ＊1
OUTP – OUTN
Pulse response
characteristic(405nm) ＊1
OUTP – OUTN
Pulse response
characteristic(650,780nm) ＊1
OUTP Outputmaximum voltage ＊1
OUTN Output
maximum voltage ＊1

DS0207-10E 2021/6/21

No input optical power

No input optical power

Output Amplitude：2.0VP-P
Rise(fall)time
λ=405nmOutput Amplitude：2.0VP-P
Rise(fall)time
λ=650,780nm

mV

uV/℃

+4.7dB
0dB-4.7dB

2.5

LL+4.7dB
0dB-4.7dB

2.5

MVP

HH

+4.7dB－VCC reference

-1.1

－－

V

MVN

HH+4.7dB－

GND reference

－－

1.1

VTr
Tf

7YITOA MICRO TECHNOLOGY CORPORATION

CPF233AL

Item

BD/DVD/CD Differential FMD

SymbolOUTP – OUTN
DC Sensitivity ＊1

OUTP – OUTN
DC Sensitivity
Temperature Drift ＊1

DCS

TDCS

IV_AmpGain
HH
HL
LH
LL
HH
HL
LH
LL
HH
HL
LH
LL
HH
HL
LH
LL

Gain
Adjustment
Amp Gain

VREF

Optical Input
Condition

MIN

TYP

MAX

-25%
-25%-25%-25%-25%-25%-25%-25%-25%-25%-25%-25%

7.33
3.28
1.46
0.65
13.1
5.86
2.62
1.17
13.1
5.86
2.62
1.17

+25%+25%+25%+25%+25%+25%+25%+25%+25%+25%+25%+25%

Unit0dB－λ=405nm

0dB－

λ=650nm0dB－

λ=780nm0dB－

λ=405/650/780nm

-0.15

-

0.15％/℃

mV/uW

mV/uW

mV/uW

Gain Adjustment rangeof
Gain_Adjustment_Amp

GAJ－－－－

±4.2

±4.7

±5.2dB

IV_Amp Gain Step

GS

HH-HL
HL-LH
LH-LL－－－

6.3

77.7

dB

DG

－－－

＊2-50

050%

ZOUT

LL0dB－－

142026

Ω

Gain_Adjustment_Amp
Gain step Accuracy＊1
OUTP，OUTN
Output Impedance ＊1＊1： Design guarantee item＊2：

Gain_step = { Gain(0) - Gain(63) } / 63
Ex.

Gain(0) ： Gain_Adjustment_AMP Setup (D5-D0) >>>000000

Accuracy of Gain_Step (between 31 to 32)
DG(between 31 to 32)= { Gain(31) - Gain(32) } / Gain_step - 1

DS0207-10E 2021/6/21

8

YITOA MICRO TECHNOLOGY CORPORATION

CPF233AL

BD/DVD/CD Differential FMD

８．２ Serial interface（ＤＣ）
ItemHigh level input voltage

Symbol

MIN

TYP

MAX

Unit

VIH

2.4－VCC

VCondition

Low level input voltage

VIL0－0.6

V

High level input current1

IIH1466686uA

VIH=3.3V P2,4High level input current2

IIH2-10－10uA

VIH=3.3V P3Low level input current

IIL-10－10uA

VIL=0VHigh level output voltage 1

VOH1

2.9

3.3

3.7

V

IOH=0mA

High level output voltage 2VOH2

2.3

3.7

V

IOH=1mA

Low level output voltage

VOL01

V

IOL=1mA

８．３ Serial interface（ＡＣ）
８．３．１ Ｗｒｉｔｅ
EN(HOST)t5

CLK(HOST)

Tc
c
t1 t2

t6t7

90%
50%10%t3 t4

DATA(HOST)

A7 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0Symbol

Item

MIN

TYPMAXUnit－－20MHz

CLK

CLK frequency ＊Tcc

CLK cycle ＊50－

－

nst1

CLK ”H” pulse width ＊15－

－nst2

CLK ”L” pulse width ＊15－

－

nst3

DATA setup time ＊

15－

－

nst4

DATA hold time ＊15－

－

nst5

EN setup time ＊15－

－

nst6

EN hold time ＊1/CLK－－st7

EN “L” time ＊100－－ns＊ ：Design guarantee item

DS0207-10E 2021/6/21

9YITOA MICRO TECHNOLOGY CORPORATION

CPF233AL

BD/DVD/CD Differential FMD

８．３．２ ＲｅａｄEN(HOST)

Tcct1 t2t5

CLK(HOST)

t6t7

90%50%10%t3 t4DATA(HOST)Hi-Z

A7 A6 A5 A4 A3 A2 A1 A0Symbol

t8

Hi-Z

DATA
(CPF233AL)

t9

D7 D6 D5 D4 D3 D2 D1 D0Item

MIN

TYP

MAX

Unit

CLK

CLK frequency ＊－－5MHzTcc

CLK cycle ＊200－

－

nst1

CLK “H” pulse width ＊90－

－

nst2

CLK “L” pulse width ＊90

－

－

nst3

DATA setup time ＊90

－

－

nst4

DATA hold time ＊90－

－

nst5

EN setup time ＊90

－

－

nst6

EN hold time ＊1/CLK－－st7

EN “L” time ＊100－－nst8

DATA output delay time ＊－－90nst9

DATA output hold time ＊－－90

ns＊ ：Design guarantee item

DS0207-10E 2021/6/2110

YITOA MICRO TECHNOLOGY CORPORATION

CPF233AL

BD/DVD/CD Differential FMD

９． Exterminal dimension

LCOB-8PIN（2.4mm×2.0mm） Terminal pitch：0.5mm
PD Size 500umφDS0207-10E 2021/6/21

11

YITOA MICRO TECHNOLOGY CORPORATION

CPF233AL

BD/DVD/CD Differential FMD

１０． Dimensions and Location of Photo Detector
1.2mm(PD Center)

Photo Detector：500umφ2.0mm

1.4mm(PD Center)#12.4mm

１１． Reference land pattern

DS0207-10E 2021/6/21

12YITOA MICRO TECHNOLOGY CORPORATION

CPF233AL

BD/DVD/CD Differential FMD

To Customers:
If any product described in this document corresponds to goods or technologies which are restricted to export under theJapanese “Foreign Exchange and Foreign Trade Control Law” or other applicable laws of a government having
jurisdiction, then, appropriate permission for exporting such products or technologies are required to be taken.
In relation to use of the information contained in this document, no license is granted to you with regard to any
intellectual property rights of YITOA MICRO TECHNOLOGY CORPORATION (hereinafter referred to as "MTC") or
any third party. MTC will not be liable in any way for any claim related to infringement of intellectual property rights
or other rights of third parties arising from the use of the information contained in this document.
The information concerning the circuits and other related information contained in this document is provided forreferential purpose only to explain the operation or application of the products, and it will be your sole responsibility touse such information for designing of your own devices. MTC will not be liable in any way for any loss or damages
incurred to you or any other party arising from the use of such information.
In general, failures in semiconductor products occur at certain percentage. Therefore, upon designing your own devices,
please give due consideration to the redundancy, safety of your devices and methods to prevent occurrence ofmalfunction in order to avoid personal injuries, accidents or other social damages which might happen as the result of a
failure of semiconductor products used in your devices.
For application of MTC products to medical equipment or other purposes where high reliability of the device is required,please contact MTC sales representative.
The contents of this documents may be subject to change without any notice, due to improvement of reliability or designof the products.
It is inhibited to reproduce or copy the whole or part of this document without the permission of MTC.

YITOA Micro Technology Corporation
Sales Division
465 Osato-cho, Kofu-shi, Yamanashi
400-0053 Japan
Phone (81)-55- 241 – 8622

DS0207-10E 2021/6/21

13YITOA MICRO TECHNOLOGY CORPORATION