NPC SM8750AV Datasheet
SM8750AV
NIPPON PRECISION CIRCUITS INC.
Data Jitter Measurement IC
OVERVIEW
The SM8750AV is a data jitter measurement CMOS LSI for adaptive control.
FEATURES
■
RDCLK and DATA signal phase difference to
voltage converter (75mV/ns (typ) coefficient)
■
RDCLK duty auto-adjust function (rising edge
reference)
■
DATA signal delay auto-adjust function (independently adjusted on rising and falling edges)
■
Offset auto-calibration function
■
3-wire serial interface mode control
■
Sleep function
■
Single 5V supply
■
16-pin VSOP
APPLICATIONS
■
Optical disc equipment
• CD-R
• CD-RW
• DVD-RAM
• Others
■
Control/governing equipment
PINOUT
START
DATA
CALMON
RDCLK
LIMIT
SENB
SCLK
SDATA
PACKAGE DIMENSIONS
1
8
Top view
87
50A
V
16
9
VDD
TVOUT
VREF2
RCP
RDUTY
RDATAF
RDATAR
GND
ORDERING INFORMATION
De vice Pack ag e
SM8750AV 16-pin VSOP
Unit: mm
0.65
0.275typ
5.1 ± 0.2
0.22
+ 0.1
− 0.05
0.10
4.4 ± 0.2
1.15 ± 0.1
0.12
6.4 ± 0.2
0.10 ± 0.05
M
0 to 10
0.15
+ 0.10
− 0.05
0.5 ± 0.2
NIPPON PRECISION CIRCUITS—1
BLOCK DIAGRAM
SM8750AV
VDD
47k
CALMON
RDCLK
LIMIT
SENB
Phase comparator
Automatic regulation
controller
to each block
Serial interface
SCLK
SDATA GND RDATAR
STARTDATA
VDD TVOUT
Charge pump
(phase difference to
voltage converter)
Duty correction
Delay correction
output buffer
39k
VREF2
RCP
33k
RDUTY
22k
RDATAF
39k
PIN DESCRIPTION
Number Name I/O Description
1 STAR T I Measurement start control. Phase difference to voltage conversion starts on the falling edge.
2 DATA I Tw o-valued signal input
3 CALMON O Internal calibration state signal monitor output. N-channel open drain. Active when calibrated.
4 RDCLK I PLL clock input
5 LIMIT I TVOUT output voltage-limit control voltage input
6 SENB I Serial interface: enable signal input
7 SCLK I Serial interface: clock signal input
8 S DATA I/O Serial interface: data signal input/acknowledge signal output. N-channel open drain.
9 G ND – Ground
10 R D ATAR O D ATA rising edge: delay adjust circuit reference-current setting resistor connection
11 RD ATAF O DATA falling edge: delay adjust circuit reference-current setting resistor connection
12 RDUTY O RDCLK duty adjust circuit reference-current setting resistor connection
13 R C P O Phase difference to voltage converter coefficient reference-current setting resistor connection
14 VREF2 I 2V reference voltage input
15 TV O U T O Phase difference to voltage conver ter output
16 VD D – 5V supply
NIPPON PRECISION CIRCUITS—2
+
−
−
−
°
° C
−
SM8750AV
SPECIFICATIONS
Absolute Maximum Ratings
GND = 0V
Parameter Symbol Rating Unit
Supply voltage range V
Input voltage range V
Storage temperature range T
Po w er dissipation P
Recommended Operating Conditions
GND = 0V
DD
IN
stg
D
0.5 to 7.0 V
0.5 to V
0.5 V
DD
40 to 125
250 m W
C
Parameter Symbol Rating Unit
Supply voltage (specifications guaranteed) V
Supply voltage (operation guaranteed) V
Reference voltage input V
Operating temperature range T
DC Electrical Characteristics
V
= 5V ± 5%, GND = 0V, T
DD
Parameter Symbol Condition
Current consumption
HIGH-level logic input voltage
L O W -level logic input voltage
HIGH-level logic input current
L O W -level logic input current
1
2
2
2
2
SD ATA, CALMON logic output voltage V
VREF2 input current I
1. 39k Ω resistor connected between RDATAR and GND
39k Ω resistor connected between RDATAF and GND
22k Ω resistor connected between RDUTY and GND
resistor connected between RCP and GND
33k Ω
60MHz RDCLK input frequency
7.5MHz DATA input frequency
200kHz STAR T input frequency
0ns DATA and RDCLK phase difference
Serial interface not operating.
2. Pins STA RT, DATA, RDCLK, SENB, SCLK, SDATA.
= 0 to 70 ° C
a
I
DD1
I
DD2
V
IH
V
IL
I
IH
I
IL
OL
REF
Normal operating mode – 9.0 13.0
Sleep mode – 0.5 0.7
V
= V
IN
DD
V
= GND
IN
I
= 10mA – – 1.0 V
OL
VRFE2 = 2V – 50 100 µA
DD
DD
REF2
opr
4.75 to 5.25 V
4.5 to 5.5 V
1.89 to 2.11 V
0 to 70
Rating
Unit
min typ max
mA
2.4 – – V
– – 0.6 V
––3µA
3– –µA
NIPPON PRECISION CIRCUITS—3
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