Obsolescence Notice
This product is obsolete.
This information is available for your
convenience only.
For more information on
Zarlink's obsolete products and
replacement product lists, please visit
http://products.zarlink.com/obsolete_products/
ZN404 / ZN404D
2.45V PRECISION REFERENCE REGULATOR
The ZN404 is a monolithic integrated circuit providing a
precise stable reference source of 2.45V without the need for
an external shaping capacitor.
FEATURES
s
Low Temperature Coefficient
s
Low Slope Resistance
s
Very Good Long Term Stability
s
Low Noise
s
Internally Shaped
s
Tight Tolerance
s
ZN404 - 2-Lead TO-18 Metal Can Package
s
ZN404D - 8-Lead Miniature Plastic Surface Mount
Package
DS3030 - 2.1
Fig.1 Pin connections
Device
ZN404
ZN404D
Package
-20
C to +70
C
-20
C to +70
C
Operating Temperature
CM2
MP8
ORDERING INFORMATION
ABSOLUTE MAXIMUM RATINGS
Dissipation
300mW
Operating temperature range
ZN404
-20
C to +70
C
ZN404D
-20
C to +70
C
Storage temperature range
-55
C to +125
C
Fig.2 Circuit diagram
AV
-VE
+VE
BAND
GAP
REFERENCE
GND
R
R =
VS
VREF
VS - VREF
IREF
GND
VREF
1
VREF
8
NC
2
NC
7
NC
3
NC
6
NC
4
NC
5
GND
ZN404 (CM2) - BOTTOM VIEW
ZN404D (MP8) - TOP VIEW
ZN404
2
ELECTRICAL CHARACTERISTICS
(at T
amb
= 25
C unless otherwise specified)
Output voltage
Slope resistance
Reference current
Maximum change in V
REF
RMS noise voltage 1Hz-10kHz
V
REF
drift at 70
C
V
REF
R
REF
I
REF
V
REF
2.38
-
2.0
-
2.45
0.1
-
6
10
10
2.52
0.2
120
33
-
-
V
mA
mV
V
ppm/1000
hours
Measured at 2mA
-20 to +70
C
1kHz - 10kHz
CM2 Package
Parameter
Symbol
Min.
Typ.
Max.
Units
Test conditions
Fig.3 Dynamic impedance
10
1.0
0.1
DYNAMIC IMPEDANCE (ohms)
0.1
1.0
10
100
FREQUENCY (kHz)
IREF = 2mA
IREF = 20mA
ZN404
3
0.4
0.8
1.2
1.6
2.0
2.4
2.8
10
-1
10
-2
10
-3
10
-4
FORWARD VOLTAGE (V)
FORWARD CURRENT (A)
0
10
20
30
40
50
60
70
80
-10
-8
-6
-4
-2
0
2
4
6
8
10
TEMPERATURE (C)
CHANGE IN REFERENCE VOLTAGE,
V (mV)
Fig.4 Forward characteristic (typical)
Fig.5 Temperature characteristic (typical)
Fig.6 Derating curve
0
10
20 25 30
40
50
60
70
AMBIENT TEMPERATURE (C)
140
120
100
80
75
60
40
20
0
IREF (MAX)
(mA)
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