PRELIMINARY DATA SHEET
PHOTOCOUPLER
PS9551L4
HIGH CMR, DIGITAL OUTPUT TYPE
OPTICAL COUPLED ISOLATION AMPLIFIER
(SIGMA-DELTA MODULATOR)
DESCRIPTION
The PS9551L4 is an optical coupled isolation amplifier that uses an IC provided with a high-accuracy A/D
conversion function (sigma-delta modulation method) and a GaAIAs light-emitting diode with high-speed response and
high luminance efficiency on the input side. On the output side IC provided with an encoding function.
The PS9551L4 is designed specifically for high common mode transient immunity (CMR) and high linearity (non-
linearity). The PS9551L4 is suitable for current sensing in motor drives.
−NEPOC
Series−
FEATURES
• Non-linearity (INL = 30 LSB MAX.)
• High common mode transient immunity (CMR = 10 kV/
μ
s MIN.)
• High isolation voltage (BV = 5 000 Vr.m.s.)
• Package: 8-pin DIP lead bending type (Gull-wing) for long creepage distance
for surface mount (L4)
• Ordering number of tape product: PS9551L4-E3: 1 000 pcs/reel
• Pb-Free product
• Safety standards
• UL approved: File No. E72422
• CSA approved: No. CA 101391
• BSI approved: No. 8937, 8938
• SEMKO approved: No. 611507
• NEMKO approved: No. P06207243
• DEMKO approved: No. 313935
• FIMKO approved: No. FI 22827
• DIN EN60747-5-2 (VDE0884 Part2) approved (Option)
1
A/D Converter
PIN CONNECTION
(Top View)
8
7
6
5
SHIELD
Decorder
2
3
4
1. V
DD
1
2. V
IN+
3. V
IN–
4. GND1
5. GND2
6. MDAT
7. MCLK
8. V
DD
2
APPLICATIONS
• AC Servo, inverter
• Measurement equipment
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Document No. PN10671EJ01V0DS (1st edition)
Date Published October 2007 NS
2007
PS9551L4
ABSOLUTE MAXIMUM RATINGS (T
A
= 25°C, unless otherwise specified)
Parameter
Operating Ambient Temperature
Storage Temperature
Supply Voltage
Input Voltage
2 Seconds Transient Input Voltage
Output Voltage
Symbol
T
A
T
stg
V
DD
1, V
DD
2
V
IN+
, V
IN−
V
IN+
, V
IN−
MCLK, MDAT
MIN.
−40
−55
0
−2
−6
−0.5
MAX.
85
125
5.5
V
DD
1+0.5
V
DD
1+0.5
V
DD
2+0.5
Unit
°C
°C
V
V
V
V
RECOMMENDED OPERATING CONDITIONS (T
A
= 25°C, unless otherwise specified)
Parameter
Operating Ambient Temperature
Supply Voltage
Input Voltage (Accurate and Linear)
Symbol
T
A
V
DD
1, V
DD
2
V
IN+
, V
IN−
MIN.
−40
4.5
−200
MAX.
85
5.5
200
Unit
°C
V
mV
4
Preliminary Data Sheet PN10671EJ01V0DS
PS9551L4
ELECTRICAL CHARACTERISTICS (DC Characteristics)
(TYP.: T
A
= 25°C, V
IN+
= V
IN−
= 0 V, V
DD
1 = V
DD
2 = 5 V,
MIN., MAX.: T
A
=
−40
to +85°C, V
IN+
= V
IN−
=
−200
to 200 mV, V
DD
1 = V
DD
2 = 4.5 to 5.5 V, unless
otherwise specified)
Parameter
Input Supply Current
Output Supply Current
Input Bias Current
Low Level Output Voltage
High Level Output Voltage
Output Short-circuit Current
Equivalent Input Resistance
Output Clock Frequency
Data Hold Time
*2
*1
Symbol
I
DD
1
I
DD
2
I
IN+
V
OL
V
OH
⏐I
OSC
⏐
R
IN
f
CLK
t
HDDAT
CMRR
IN
Conditions
V
IN+
= 350 mV
V
IN+
=
−
350 mV
MIN.
TYP.
14.5
10
−0.8
MAX.
18
15
Unit
mA
μ
A
0.6
V
V
mA
k
Ω
13.2
MH z
ns
I
OUT
= 1.6 mA
I
OUT
=
−100
μ
A
V
OUT
= V
DD
2 or V
OUT
= GND2
3.9
0.1
4.9
30
300
8.2
15
60
10
Input DC Common-Mode Rejection
Ratio
dB
*1
The data hold time is that MDAT will stay stable following the rising edge of MCLK.
*2
CMRR
IN
is defined as the ratio of the differential signal gain (apply the differential signal between V
IN+
and V
IN−
) to
the isolation-mode gain (connect both input pins to GND1 and apply the signal between (PS9551L4’s) input and
output) at 60 Hz. This value is indicated in dB.
Preliminary Data Sheet PN10671EJ01V0DS
5
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