1.2V and 2.5V Micropower
VOLTAGE REFERENCE
FEATURES
q
INITIAL ACCURACY:
REF1004-1.2
4mV
REF1004-2.5
20mV
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MINIMUM OPERATING CURRENT:
REF1004-1.2 10
A
REF1004-2.5 20
A
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EXCELLENT LONG TERM
TEMPERATURE STABILITY
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VERY LOW DYNAMIC IMPEDANCE
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OPERATES UP TO 20mA
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PACKAGE: 8-Lead SOIC
International Airport Industrial Park Mailing Address: PO Box 11400 Tucson, AZ 85734 Street Address: 6730 S. Tucson Blvd. Tucson, AZ 85706
Tel: (520) 746-1111 Twx: 910-952-1111 Cable: BBRCORP Telex: 066-6491 FAX: (520) 889-1510 Immediate Product Info: (800) 548-6132
REF1004
NC
NC
NC
Anode
Cathode
NC
Cathode
NC
1
2
3
4
8
7
6
5
Typical Operating Circuit
(Top View)
APPLICATIONS
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BATTERY POWERED TEST EQUIPMENT
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PORTABLE MEDICAL INSTRUMENTATION
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PORTABLE COMMUNICATIONS DEVICES
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A/D AND D/A CONVERTERS
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NOTEBOOK AND PALMTOP COMPUTERS
DESCRIPTION
The REF1004-1.2 and REF1004-2.5 are two terminal
bandgap reference diodes designed for high accuracy
with outstanding temperature characteristics at low
operating currents. Prior to the introduction of the
REF1004 Micropower Voltage References, accuracy
and stability specifications could only be attained by
expensive screening of standard devices. The REF1004
is a cost effective solution when reference voltage
accuracy, low power, and long term temperature sta-
bility are required.
REF1004 is a drop-in replacement for the LT1004 as
well as an upgraded replacement of the LM185/385
series references. The REF1004C is characterized for
operation from 0
C to 70
C and the REF1004I is
characterized for operation from 40
C to +85
C.
The REF1004 is offered in an 8-lead Plastic SOIC
package and shipped in anti-static rails or tape and
reel.
1992 Burr-Brown Corporation
PDS-1172
Printed in U.S.A. October, 1993
2
REF1004
REF1004-1.2
REF1004-2.5
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
REFERENCE VOLTAGE
I
R
= 100
A
1.231
1.235
1.239
2.490
2.500
2.511
V
REF1004C
(1)
1.229
1.235
1.239
2.487
2.500
2.511
REF1004I
(2)
1.225
1.235
1.239
2.480
2.500
2.511
AVERAGE TEMPERATURE
COEFFICIENT
I
MIN
I
R
20mA
20
20
ppm/
C
MINIMUM OPERATION
CURRENT
(3)
8
10
12
20
A
REVERSE BREAKDOWN
I
MIN
I
R
1mA
1
1
mV
VOLTAGE
CHANGE WITH
1.5
(3)
1.5
(3)
CURRENT
1mA
I
R
20mA
10
10
20
(3)
20
(3)
REVERSE DYNAMIC
IMPEDANCE
(3)
I
R
= 100
A
0.2
0.6
0.2
0.6
WIDE BAND NOISE (RMS)
I
R
= 100
A
10Hz
I
R
10kHz
60
120
V
LONG TERM STABILITY
I
R
= 100
A
T
A
= 25
C
0.1
C
20
20
ppm/KHr
NOTES: (1) This specification applies over the full operating temperature range of 0
C
T
A
70
C. (2) This specification applies over the full operating
temperature range of 40
C
T
A
+85
C. (3) Denotes the specifications which apply over the full operating temperature range.
SPECIFICATIONS
ELECTRICAL
T
A
= +25
C unless otherwise noted.
MODEL
T
A
V
Z
PACKAGE
REF1004C-1.2
0
C to +70
C
1.2V
8-Lead SOIC
REF1004C-2.5
0
C to +70
C
2.5V
8-Lead SOIC
REF1004I-1.2
40
C to +85
C
1.2V
8-Lead SOIC
REF1004I-2.5
40
C to +85
C
2.5V
8-Lead SOIC
NOTE: Available in Tape and Reel, Add TR to Model Number.
ORDERING INFORMATION
Reverse Breakdown Current ........................................................... 30mA
Forward Current ................................................................................ 10mA
Operating Temperature Range
REF1004C ........................................................................ 0
C to +70
C
REF1004I ...................................................................... 40
C to +85
C
Storage Temperature
REF1004C .................................................................. 65
C to +150
C
REF1004I .................................................................... 65
C to +150
C
Lead Temperature (soldering, 10s) ............................................... +300
C
ABSOLUTE MAXIMUM RATINGS
MODEL
PART MARKING
REF1004C-1.2
BBREF0412
REF1004C-2.5
BBREF0425
REF1004I-1.2
BBREF0412
REF1004I-2.5
BBREF0425
ORDERING INFORMATION
PACKAGE INFORMATION
PACKAGE DRAWING
MODEL
PACKAGE
NUMBER
(1)
REF1004C-1.2
8-Pin SOIC
182
REF1004C-2.5
8-Pin SOIC
182
REF1004I-1.2
8-Pin SOIC
182
REF1004I-2.5
8-Pin SOIC
182
NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix D of Burr-Brown IC Data Book.
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user's own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.
3
REF1004
TYPICAL PERFORMANCE CURVES 1.2V
T
A
= +25
C unless otherwise noted.
REVERSE CHARACTERISTICS
Reverse Voltage (V)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Reverse Current (A)
100
10
1
0.1
40C
T
A
+85C
Temperature (C)
55
35
15
5
25
45
65
85
105
125
1.245
1.240
1.235
1.230
1.225
Reverse Voltage (V)
TEMPERATURE DRIFT
REVERSE DYNAMIC IMPEDANCE
Reverse Current (mA)
0.01
0.1
1
10
100
100
10
1
0.1
Reverse Impedance (
)
f = 25Hz
40C to +85C
FORWARD CHARACTERISTICS
1.2
0.8
0.4
0.0
Forward Voltage (V)
Forward Current (mA)
0.01
0.1
1
10
100
T
A
= 25C
16
12
8
4
0
4
Output Voltage Change (mV)
REVERSE VOLTAGE CHANGE
Reverse Current (mA)
1
0.01
0.1
10
100
40C
T
A
+85C
REVERSE DYNAMIC IMPEDANCE
Frequency (Hz)
10
100
1k
10k
100k
1M
10k
1k
100
10
1
0.1
Dynamic Impedance (
)
T
A
= +25C
I
REF
= 100A
4
REF1004
TYPICAL PERFORMANCE CURVES 1.2V
(CONT)
T
A
= +25
C unless otherwise noted.
Frequency (Hz)
1k
10k
100k
100
10
700
600
500
400
300
200
100
0
Noise (nV/
Hz)
NOISE VOLTAGE
I
REF
= 100A
T
A
= 25C
FILTERED OUTPUT NOISE
100
1k
10k
100k
Cutoff Frequency (Hz)
Integrated Noise (V)
70
60
50
40
30
20
10
0
I
REF
= 100A
100A
R
C
RESPONSE TIME
Time (Sec)
0
100
200
300
400
500
600
1.5
1.0
0.5
0.0
5
2.5
0
Voltage (V)
36k
V
IN
V
OUT
Output
Input
5
REF1004
REVERSE CHARACTERISTICS
Reverse Current (A)
100
10
1
0.1
Reverse Voltage (V)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
40C
T
A
+85C
TYPICAL PERFORMANCE CURVES 2.5V
T
A
= +25
C unless otherwise noted.
FORWARD CHARACTERISTICS
1.2
1.0
0.8
0.6
0.4
0.2
0.0
Forward Voltage (V)
Forward Current (mA)
0.01
0.1
1
10
100
T
A
= +25C
REVERSE VOLTAGE CHANGE
Reverse Current (mA)
Output Voltage Change (mV)
6
5
4
3
2
1
0
1
2
0.01
0.1
1
10
100
40C
T
A
+85C
Temperature (C)
55
35
15
5
25
45
65
85
105
125
2.520
2.515
2.510
2.505
2.500
2.495
2.490
2.485
2.480
2.475
Reference Voltage (V)
TEMPERATURE DRIFT
REVERSE DYNAMIC IMPEDANCE
1000
100
10
1
0.1
Reverse Impedance (
)
Reverse Current (mA)
0.01
0.1
1
10
100
f = 25Hz
40C to +85C
REVERSE DYNAMIC IMPEDANCE
Frequency (Hz)
10
100
1k
10k
100k
1M
10k
1k
100
10
1
0.1
Dynamic Impedance (
)
T
A
= +25C
I
REF
= 100A
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