ZRA245
PRECISION 2.45 VOLT VOLTAGE REFERENCE
DEVICE DESCRIPTION
The ZRA245 uses a bandgap circuit design to achieve
a precision voltage reference of 2.45 volts. The
device is available in small outline surface mount
packages, ideal for applications where space saving
is important.
The ZRA245 design provides a stable voltage
without an external capacitor and is stable with
capacitive loads. The ZRA245 is recommended for
operation between 2mA and 120mA.
FEATURES
APPLICATIONS
•
Small outline SOT23, SO8 and TO92
style package
•
Battery powered and portable equipment.
•
Metering and measurement systems.
•
Instrumentation.
•
Test equipment.
•
Data acquisition systems.
•
Precision power supplies.
•
No stabilising capacitor required
•
Typical T
C
15ppm/°C
•
Typical slope resistance 0.26Ω
•
±
3% , 2% and 1% tolerance
•
Industrial temperature range
•
Operating current 2mA to 120mA
SCHEMATIC DIAGRAM
V
R
1.25V
REF
GND
ISSUE 4 — JANUARY 2006
1
SEMICONDUCTORS
ZRA245
ABSOLUTE MAXIMUM RATING
Reverse Current
Forward Current
Operating Temperature
Storage Temperature
200mA
25mA
-40 to 85°C
-55 to 125°C
Power Dissipation (T
amb
=25°C)
SOT23
E-Line, 3 pin (TO92)
E-Line, 2 pin (TO92)
SO8
330mW
500mW
500mW
625mW
ELECTRICAL CHARACTERISTICS TEST CONDITIONS
(Unless otherwise stated) T
amb
=25°C
SYMBOL
PARAMETER
CONDITIONS
LIMITS
MIN. TYP. MAX.
TOL.
%
UNITS
VR
Reverse Breakdown Voltage
I =5mA
R
2.43
2.40
2.38
2.45
2.45
2.45
2.47
2.50
2.52
2
1
2
3
V
I MIN
IR
TC †
RS §
ZR
Minimum Operating Current
Recommended Operating
Current
Average Reverse Breakdown
Voltage Temp. Co.
Slope Resistance
Reverse Dynamic Impedance
I R(min) to
I R(max)
2
15
0.26
0.28
mA
mA
ppm/°C
Ω
Ω
120
50
0.5
1
I
R
=5mA
f =100Hz
I
AC
=0.1 I
R
IR
=
5mA
f = 10Hz to
10kHz
EN
Wideband Noise Voltage
65
µV(rms)
†
T
C
=
(
V
R
(
max
)
−
V
R
(
min
)
)
x
1000000
V
R
x
(
T
(
max
)
−
T
(
min
)
)
Note: V R(max) - V R(min) is the
maximum deviation in reference voltage
measured over the full operating
temperature range.
§
R
S
=
V
R
Change
(
I
R
(
MIN
)
to I
R
(
MAX
)
)
I
R
(
MAX
)
−
I
R
(
MIN
)
ISSUE 4 — JANUARY 2006
SEMICONDUCTORS
2
ZRA245
TYPICAL CHARACTERISTICS
ISSUE 4 — JANUARY 2006
3
SEMICONDUCTORS
ZRA245
CONNECTION DIAGRAMS
E-Line, 2 pin
Package Suffix – Y
E-Line, 3 pin,Rev Package Suffix – R
ST
LA
Bottom View
E
IM
T
UY
B
E
ET
L
SO
OB
Bottom View –
Pin 3 floating or connected to pin 1
E-Line, 3 pin Package Suffix – A
SO8
Package Suffix – N8
E
ET
OL
S
OB
Bottom View –
Pin 1 floating or connected to pin 3
Top View
E
ET
L
SO
OB
SOT23 Package Suffix – F
D
DE
S
EN
M IGN
M S
CO DE
RE
T NEW
NO R
FO
Top View –
Pin 1 floating or connected to pin 2
ISSUE 4 — JANUARY 2006
SEMICONDUCTORS
4
ZRA245
ORDERING INFORMATION
Part No
ZRA245A03
ZRA245A02
ZRA245A01
ZRA245F03
ZRA245F02
ZRA245F01
ZRA245N803
ZRA245N802
ZRA245N801
Tol. %
3
2
1
3
2
1
3
2
1
Package
E-Line •
E-Line •
E-Line •
SOT23
SOT23
SOT23
SO8
SO8
SO8
Partmark
ZRA24503
ZRA24502
ZRA24501
24A
24B
24C
ZRA24503
ZRA24502
ZRA24501
Part No
ZRA245R03
ZRA245R02
ZRA245R01
ZRA245Y03
ZRA245Y02
ZRA245Y01
Tol. %
3
2
1
3
2
1
Package
E-Line *
E-Line *
E-Line *
E-Line †
E-Line †
E-Line †
Partmark
ZRA245R3
ZRA245R2
ZRA245R1
ZRA24503
ZRA24502
ZRA24501
*
†
•
E-Line 3 pin Reversed
E-Line 2 pin
E-Line 3 pin
© Zetex Semiconductors plc 2006
Europe
Zetex GmbH
Streitfeldstraße 19
D-81673 München
Germany
Telefon: (49) 89 45 49 49 0
Fax: (49) 89 45 49 49 49
europe.sales@zetex.com
Americas
Zetex Inc
700 Veterans Memorial Hwy
Hauppauge, NY 11788
USA
Telephone: (1) 631 360 2222
Fax: (1) 631 360 8222
usa.sales@zetex.com
Asia Pacific
Zetex (Asia) Ltd
3701-04 Metroplaza Tower 1
Hing Fong Road, Kwai Fong
Hong Kong
Telephone: (852) 26100 611
Fax: (852) 24250 494
asia.sales@zetex.com
Corporate Headquarters
Zetex Semiconductors plc
Zetex Technology Park
Chadderton, Oldham, OL9 9LL
United Kingdom
Telephone (44) 161 622 4444
Fax: (44) 161 622 4446
hq@zetex.com
These offices are supported by agents and distributors in major countries world-wide.
This publication is issued to provide outline information only which (unless agreed by the Company in writing) may not be used, applied or reproduced
for any purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. The Company
reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service.
For the latest product information, log on to www.zetex.com
ISSUE 4 — JANUARY 2006
5
SEMICONDUCTORS
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