NPC SM9103M Datasheet
SM9103M
NIPPON PRECISION CIRCUITS—1
NIPPON PRECISION CIRCUITS INC.
DVDRAM Head Amplifier LSI
OVERVIEW
The SM9103M is a photodiode photoelectric current-to-voltage conversion head amplifier LSI for
optical disk pickups in DVDRAM/DVDROM equipment. It sums the photodiode current data signals and
then converts the signals to a differential signal for
output. The output tracking servo and focusing servo
signals are derived from built-in sum and difference
circuits, and the gain for these servo signals can be
adjusted using serial interface controls. Each of the
signals from the photodiodes, used to generate DPD
(Differential Phase Detection) tracking servo signal,
is current-to-voltage converted and then also output.
It operates from a single 5 V supply, and is available
in 36-pin plastic SSOP packages.
FEATURES
■
RAM/ROM gain switching, low-noise RF signal
generator (differential output)
■
ROM tracking DPD signal output
■
Variable-gain RAM tracking push-pull signal output
■
Address signal, high-speed push-pull signal output
■
Variable-gain focus error signal output
■
Tracking PD sum signal output
■
Focus PD sum signal output
■
Offset correction timing output (logic)
■
Temperature monitor function
■
Serial interface to control internal parameter settings
■
Sleep-mode function
■
Single 5 V supply
■
36-pin plastic SSOP
TYPICAL APPLICATIONS
■
Double-speed DVDROM equipment
■
Double-speed DVDRAM equipment
ORDERING INFORMATION
PINOUT
36-pin SSOP
(Top view)
Device Package
SM9103M 36-pin SSOP
1MODE
2WRITE
3DGND
4DVCC
5TEMPO
6TEMPI
7T1
8T2
9T3
10T4
11F1
12F2
13AGND
14VREF
15FSUBB
16FSUB
17FADDB
18FADD 19 AGND
20 AVCC
21 DPDD
22 DPDC
23 DPDB
24 DPDA
25 DATAN
26 DATAP
27 TSUBB
28 TSUB
29 CAPAN
30 CAPAP
31 TADDB
32 TADD
33 CALREQ
34 SENB
35 SDATA
36 SCLK
SM9103M
NPC
SM9103M
NIPPON PRECISION CIRCUITS—2
PACKAGE DIMENSIONS
(Unit: mm)
BLOCK DIAGRAM
2.44 to 2.64
0.85
15.20 to 15.40
7.40 to 7.60
0.29 to 0.39
0.80
0.10 to 0.30
0.51 to 1.01
10.11 to 10.51
0.63 ± 0.10
7°
0 to 8°
0.23 to 0.32
7°
0.51 ± 0.20 45°
R0.63 to 0.89
A
B
C
D
A+B+C+D
(A+B)-(C+D)
DATAP
DATAN
TADDB
TADD
CAPAP
CAPAN
TSUBB
TSUB
DPDA
DPDB
DPDC
DPDD
CALREQ
FSUB
FSUBB
FADDB
FADD
F2
F1
AGND
AVCC
TEMPO
TEMPI
T4
T3
T2
T1
WRITE
MODE
SDATA
SENB
SCLK
VREF
to each block
Serial interface
Gain switching
amplifier
(RAM read/write,
ROM read)
Analog
Signal
processor
Offset canceller
Thermal sensor
Canceller control
Offset canceller
Gain switching
amplifier
Differential
output buffer
Amplifier
Gain switch
(2dB step)
Buffer
Buffer
Buffer
Buffer
Differential
output buffer
Gain switch
(2dB step)
Amplifier
Analog
Signal
processor
+5V
+5V
DGND
DVCC
SM9103M
NIPPON PRECISION CIRCUITS—3
PIN DESCRIPTION
Number Name I/O
1
1. I = input, Ipd = Input with built-in pull-down resistor, I/O = input/output, O = output
Function
1 MODE Ipd Mode switching/offset correction control input 1
2 WRITE Ipd Mode switching/offset correction control input 2
3 DGND – Logic circuit ground. Connect to the analog ground if there is no dedicated pickup or logic ground.
4 DVCC – Logic circuit supply. Connect to the analog supply if there is no dedicated pickup or logic supply.
5 TEMPO O Thermal sensor test output. Leave open for normal operation
6 TEMPI I Thermal sensor test input. Leave open for normal operation
7 T1 I Tracking PD input A
8 T2 I Tracking PD input B
9 T3 I Tracking PD input C
10 T4 I Tracking PD input D
11 F1 I Focus PD input E
12 F2 I Focus PD input F
13 AGND – Analog circuit ground
14 VREF I 2.0 V reference voltage input
15 FSUBB I Focus error signal feedback in put
16 FSUB O Focus error signal output
17 FADDB I Focus sum signal feedback input
18 FADD O Focus sum signal output
19 AGND – Analog circuit ground
20 AVCC – Analog circuit supply
21 DPDD O Buffered tracking signal output D for DPD servo
22 DPDC O Buffered tracking signal output C for DPD servo
23 DPDB O Buffered tracking signal output B for DPD servo
24 DPDA O Buffered tracking signal output A for DPD servo
25 DATAN O Phase-modulated data signal differential inverting output
26 DATAP O Phase-modulated data signal differential non-inverting output
27 TSUBB I Tracking push-pull signal feedback input
28 TSUB O Tracking push-pull signal output
29 CAPAN O ID data signal differential inverting output
30 CAPAP O ID data signal differential non-inverting output
31 TADDB I Tracking PD sum signal feedback input
32 TADD O Tracking PD sum signal output
33 CALREQ O Offset correction status/request output
34 SENB I Serial interface enable input
35 SDATA I/O Serial interface data input/acknowledge output
36 SCLK I Serial interface clock input
SM9103M
NIPPON PRECISION CIRCUITS—4
SPECIFICATIONS
Absolute Maximum Ratings
GND = 0 V
Recommended Operating Conditions
GND = 0 V
Parameter Symbol Condition Rating Unit
Supply voltage range V
CC
−
0.5 to 7.0 V
Input voltage range V
IN
−
0.5 to VCC + 0.5 V
Input current range I
IN
−
3.0 to +3.0 mA
Operating temperature range T
opr
0 to 70
°
C
Storage temperature range T
stg
−
40 to 125
°
C
Power dissipation P
D
250 mW
Soldering temperature T
sld
260
°
C
Soldering time t
sld
10 s
Parameter Symbol Condition Rating Unit
Specs-guaranteed supply voltage
range
V
CC
4.75 to 5.25 V
Operating supply voltage range V
CC
4.5 to 5.5 V
Reference voltage input V
REF
1.89 to 2.11 V
Operating temperature range T
opr
0 to 70
°
C
SM9103M
NIPPON PRECISION CIRCUITS—5
DC Electrical Characteristics
VCC = 5 V ± 5%, GND = 0 V, Ta = 0 to 70 °C
Tracking PD Input Characteristics (T1, T2, T3, T4)
VCC = 5 V ± 5%, GND = 0 V, Ta = 0 to 70 °C
Parameter Symbol Condition
Rating
Unit
min typ max
Current consumption
1
1. 18 kΩ resistor connected between TSUB and TSUBB
47 kΩ resistor connected between TADD and TADDB
22 kΩ resistor connected between FSUB and FSUBB
27 kΩ resistor connected between FADD and FADDB
SENB, SDATA, SCLK connected to GND; All other pins (excluding supply and ground pins) open circuit.
I
CC1
Operating mode – 2 4 30
mA
I
CC2
Sleep mode – – 1
MODE, WRITE, SENB, SDA TA, SCLK HIGH-level
input voltage
V
IH
0.8V
CC
––V
MODE, WRITE, SENB, SDATA, SCLK LOW-le v el
input voltage
V
IL
– – 0.2V
CC
V
MODE, WRITE HIGH-level input current I
IH1
VIN = V
CC
50 100 200 µA
SENB, SDATA, SCLK HIGH-level input current I
IH2
VIN = V
CC
––3µA
MODE, WRITE, SENB, SDATA, SCLK LOW-le v el
input current
I
IL
VIN = 0 V
−
3– –µA
CALREQ HIGH-level output voltage V
OH
IOH = −0.2 mA VCC − 0.2 – – V
CALREQ LOW-level output voltage V
OL1
IOL = 0.8 mA – – 0.4 V
SDATA LOW-level output voltage V
OL2
IOL = 7 mA – – 1.0 V
VREF input current I
REF
V
REF
= 2.0 V – – 250 µA
Parameter Condition
Rating
Unit
min typ max
Input impedance No signal – – 25 0
Ω
Input conversion noise current 100 kHz to 10 MHz
RAM read
1
1. DATAP − DATAN output difference operation when 10 pF capacitors are connected to T1, T2, T3, T4
– 0.035 –
µA
rms
ROM read
1
– 0.27 –
Pin voltage No signal – – 1.5 V
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