ZXLT1004
SOT23 MICROPOWER (4
µ
A) 1.22V VOLTAGE REFERENCE
DESCRIPTION
The ZXLT1004 is a 1.22 volt bandgap reference circuit
designed for ultra low current operation, typically 4µA.
The device is available in a SOT23 surface mount
package offering the ultimate in space and power
saving. These features make the ZXLT1004 particularly
suitable for portable and battery powered applications.
SOT23 tolerance selection is available to 0.5% for
precision applications. Excellent performance is
maintained over the 8µA to 20mA operating current
range with a typical temperature coefficient of only
20ppm/°C. The device has been designed to be highly
tolerant of capacitive loads so maintaining excellent
stability.
As well as the SOT23, the ZXLT1004 can offer a pin for
pin compatible alternative to the REF1004, LT1004 and
LM185/385 series of voltage references with E-Line
(TO92 style) equivalent.
FEATURES
•
•
•
•
•
•
•
•
High performance alternative to REF1004, LT1004
and LM185/385 references
4µA typical knee current
Small outline SOT23 package
E-Line alternative available
20ppm/°C typical temperature coefficient
Unconditionally stable
0.5%, 1%, 2% and 3% tolerance
Contact Zetex marketing for availability of tighter
tolerance devices
APPLICATIONS
•
•
•
•
•
•
•
•
Battery powered equipment
Precision power supplies
Portable instrumentation
Portable communications devices
Notebook and palmtop computers
Data acquisition systems
A/D and D/A converters
Test equipment
SCHEMATIC DIAGRAM
V
R
APPLICATIONS CIRCUIT
1.5V
27k
1.22V
G
nd
Ultra low quiescent reference from a 1.5V battery
source.
ISSUE 1 - JANUARY 2003
1
ZXLT1004
ABSOLUTE MAXIMUM RATINGS
Reverse Current
Forward Current
Operating temperature.
Storage temperature.
30mA
10mA
-40 to 85°C
-55 to 125°C
Power Dissipation (T
amb
=25°C)
SOT23
330mW
E-Line
500mW
ELECTRICAL CHARACTERISTICS
TEST CONDITIONS (Unless otherwise stated) T
amb
=25°C
SYMBOL
PARAMETER
CONDITIONS
LIMITS
MIN
V
R
Reverse Breakdown Voltage
I
R
=100µA
1.214
1.208
1.196
1.183
TYP
1.22
1.22
1.22
1.22
4
0.008
I
R(min)
to
I
R(max)
I
R
=8µA to 1mA
I
R
=1mA to 20mA
I
R
=1mA
f =100Hz
I
AC
=0.1 I
R
I
R
=8µA to 100µA
f=10Hz to 10kHz
0.2
20
MAX
1.226
1.232
1.244
1.257
8
20
75
0.5 ‡
1
2
3
V
TOL. %
UNITS
I
MIN
I
R
T
C
†
Minimum Knee Current
Recommended Operating
Current Range
Average Reverse Breakdown
Voltage Temperature
Coefficient
Reverse Breakdown Voltage
change with Current
Reverse Dynamic Impedance
µA
mA
ppm/°C
∆V
R
∆I
R
Z
R
1
10
0.6
mV
mV
Ω
E
N
Wideband Noise Voltage
60
µV(rms)
10
Reverse Current (µA)
8
6
4
2
0
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
-40°C
25°C
85°C
†
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.
‡ Note: 0.5% SOT23 only
Reverse Voltage (V)
Reverse Characteristics
ISSUE 1 - JANUARY 2003
2
ZXLT1004
TYPICAL CHARACTERISTICS
1.25
1.24
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.1
1
10
100
1000
Reference Voltage (V)
Forward Voltage (V)
1.23
1.22
1.21
1.20
1.19
-40
-20
0
20
40
60
80
Forward Current (mA)
Temperature (°C)
Forward Characteristics
Temperature Drift
14
12
100
Slope Resistance (Ω)
10
8
6
4
2
0
0.001
-40°C
25°C
85°C
Slope Resistance (Ω)
10
1
20mA
1mA
100µA
0.01
0.1
1
10
100
0.1
0.01
0.1
1
10
100
Reference Current (mA)
Frequency (kHz)
Slope Resistance v Current
1.5
1.0
0.5
10µA
20mA
Slope Resistance v Frequency
80
70
Wideband Noise (µV)
80
120
140
V
R
(V)
60
50
40
30
20
10
0
0
I
in
(µA)
10
0
0
40
0
10 20
30
40
50
60
70
80
90
100
Time (µs)
Reference Current (µA)
Transient Response
Noise Voltage
ISSUE 1 - JANUARY 2003
3
ZXLT1004
Ordering Information
Device
ZXLT1004CF
ZXLT1004DF
ZXLT1004EF
ZXLT1004FF
ZXLT1004DR
ZXLT1004ER
ZXLT1004FR
†
†
†
TOL%
0.5
1
2
3
1
2
3
Package
SOT23
SOT23
SOT23
SOT23
E-Line
E-Line
E-Line
Partmarking
10D
10C
10B
10A
ZXRE1004D
ZXRE1004E
ZXRE1004F
†Contact Zetex marketing for availability of these package options
NOTE:
for tape and reel options add suffix TA to the part number
eg ZXLT1004DFTA
Connection Diagrams
SOT23
Package Suffix – F
E-Line, 3 pin,Rev
Package Suffix – R
Top View –
Pin 1 floating or
connected to pin 2
Bottom View –
Pin 3 floating or
connected to pin 1
Zetex plc.
Fields New Road, Chadderton, Oldham, OL9-8NP, United Kingdom.
Telephone: (44)161 622 4422 (Sales), (44)161 622 4444 (General Enquiries)
Fax: (44)161 622 4420
Zetex GmbH
Streitfeldstraße 19
D-81673 München
Germany
Telefon: (49) 89 45 49 49 0
Fax: (49) 89 45 49 49 49
Zetex Inc.
700 Veteran’s Memorial Hwy
Hauppauge, NY 11788
USA
Telephone: (631) 360-2222
Fax: (631) 360-8222
Zetex (Asia) Ltd.
3701-04 Metroplaza, Tower 1
Hing Fong Road,
Kwai Fong, Hong Kong
Telephone:(852) 26100 611
Fax: (852) 24250 494
These are supported by
agents and distributors in
major countries world-wide
Zetex
plc 2003
www.zetex.com
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.
ISSUE 1 - JANUARY 2003
4
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