19-1730; Rev 0; 8/00
1µA SOT23 Precision Shunt
Voltage Reference
General Description
The MAX6006–MAX6009 ultra-low-power shunt refer-
ences are ideal for space-critical and low-power appli-
cations. They are offered in 3-pin SOT23 packages,
and the minimum operating current is guaranteed to be
<1µA. The devices feature low temperature coefficients
of <30ppm/°C and initial accuracy of better than 0.2%.
Available in +1.25V, +2.048V, +2.5V, and 3V output
voltages, the MAX6006–MAX6009 have references of
+1.25V, +2.048V, +2.5V, and +3.0V, respectively. The
devices can be used as lower-power, higher-precision
upgrades to the ICL8069, LM385, LT1004, and LM4040
references. The MAX6006–MAX6009 are available in
two grades: A and B. The A grade features a tempera-
ture coefficient of 30ppm/°C over the extended temper-
ature range of -40°C to +85°C, with an initial accuracy
of 0.2%. Grade B features a temperature coefficient of
75ppm/°C with an initial accuracy of 0.5%. MAX6006
in+1.25V and MAX6008 in +2.5V are offered in 8-pin
SOIC packages, as plug in upgrades for LT1004 and
LM285.
o
Small 3-Pin SOT23 Package
o
Initial Voltage Accuracy: 0.2%
o
Temperature Coefficient: 30ppm/°C max
o
Temperature Range: -40°C to +85°C
o
Factory-Trimmed Output Voltages: +1.25V,
+2.048V, +2.5V, +3.0V
o
Wide Operating Range: 1µA to 2mA
Features
o
Ultra-Low Operating Current: Guaranteed <1µA
MAX6006–MAX6009
Selector Guide
PART
MAX6006A
OUTPUT
VOLTAGE
(V)
1.25
1.25
2.048
2.048
2.5
2.5
3.0
3.0
INITIAL
TEMPERATURE
ACCURACY COEFFICIENT
(%)
(ppm/°C)
0.2
0.5
0.2
0.5
0.2
0.5
0.2
0.5
30
75
30
75
30
75
30
75
________________________Applications
Battery-Powered Equipment
Portable Meters
Precision Regulators
A/D and D/A Converters
MAX6006B
MAX6007A
MAX6007B
MAX6008A
MAX6008B
MAX6009A
MAX6009B
Ordering Information appears at end of data sheet
Typical Operating Circuit
V
S
Pin Configuration
TOP VIEW
MAX6006
MAX6007
MAX6008
MAX6009
I
RMIN
+ I
L
R
BIAS
I
L
V
R
I
RMIN
V
OUT
OUT
1
3
GND
2
I.C.
N.C.
N.C.
N.C.
1
2
3
8
7
6
5
OUT
N.C.
OUT
N.C.
MAX6006
MAX6007
MAX6008
MAX6009
V -V
R
BIAS
=
S R
I
L
+ I
RMIN
0.01µF
GND
4
SOT23-3
SO
1
________________________________________________________________
Maxim Integrated Products
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1µA SOT23 Precision Shunt
Voltage Reference
MAX6006–MAX6009
ABSOLUTE MAXIMUM RATINGS
Operating Current (OUT to GND) ......................................20mA
Forward Current (GND to OUT) ..........................................20mA
Continuous Power Dissipation (T
A
= +70°C)
3-Pin SOT23 (derate 4mW/°C above +70°C) ..............320mW
8-Pin SO (derate 5.48mW/°C above +70°C)...............471mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS—MAX6006
(T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Reverse Breakdown Voltage
Minimum Operating Current
Reverse Breakdown Change
with Current
Reverse Dynamic Impedance
Low-Frequency Noise
Temperature Coefficient
(Note 3)
Long-Term Drift
Thermal Hysteresis (Note 4)
TC
SYMBOL
V
R
I
RMIN
T
A
= +25°C,
I
R
= 1.2µA
I
R
= 1.2µA to 200µA
I
R
= 200µA to 2mA
I
R
= 1.2µA to 2mA (Note 2)
I
R
= 1.2µA, f = 0.1Hz to 10Hz
I
R
= 1.2µA
1000h at T
A
= +25°C
MAX6006A
MAX6006B
150
200
30
30
75
CONDITIONS
MAX6006A (0.2%)
MAX6006B (0.5%)
MIN
1.2475
1.2438
TYP
1.2500
1.2500
0.5
MAX
1.2525
1.2563
1.0
1.0
2.0
1.5
UNITS
V
µA
mV
Ω
µV
p-p
ppm/°C
ppm
ppm
V
R
change <0.2% from V
R
at I
R
= 1.2µA
2
_______________________________________________________________________________________
1µA SOT23 Precision Shunt
Voltage Reference
ELECTRICAL CHARACTERISTICS—MAX6007
(T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Reverse Breakdown Voltage
Minimum Operating Current
Reverse Breakdown Change
with Current
Reverse Dynamic Impedance
Low-Frequency Noise
Temperature Coefficient
(Note 3)
Long-Term Drift
Thermal Hysteresis (Note 4)
TC
SYMBOL
V
R
I
RMIN
T
A
= +25°C,
I
R
= 1.2µA
I
R
= 1.2µA to 200µA
I
R
= 200µA to 2mA
I
R
= 1.2µA to 2mA (Note 2)
I
R
= 1.2µA, f = 0.1Hz to 10Hz
I
R
= 1.2µA
1000h at T
A
= +25°C
MAX6007A
MAX6007B
150
200
50
30
75
CONDITIONS
MAX6007A (0.2%)
MAX6007B (0.5%)
MIN
2.0439
2.0378
TYP
2.048
2.048
0.5
MAX
2.0521
2.0582
1.0
1.3
2.3
1.8
UNITS
V
µA
mV
Ω
µV
p-p
ppm/°C
ppm
ppm
MAX6006–MAX6009
V
R
change <0.2% from V
R
at I
R
= 1.2µA
ELECTRICAL CHARACTERISTICS—MAX6008
(T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Reverse Breakdown Voltage
Minimum Operating Current
Reverse Breakdown Change with
Current
Reverse Dynamic Impedance
Low-Frequency Noise
Temperature Coefficient
(Note 3)
Long-Term Drift
Thermal Hysteresis (Note 4)
TC
SYMBOL
V
R
I
RMIN
T
A
= +25
°
C,
I
R
= 1.2µA
CONDITIONS
MAX6008A (0.2%)
MAX6008B (0.5%)
MIN
2.4950
2.4875
TYP
2.5000
2.5000
0.5
MAX
2.5050
2.5125
1.0
1.5
2.5
2
60
30
75
150
200
UNITS
V
µA
mV
Ω
V
p-p
µ
ppm/
°
C
ppm
ppm
V
R
change <0.2% from V
R
at I
R
= 1.2µA
I
R
= 1.2µA to 200µA
I
R
= 200µA to 2mA
I
R
= 1.2µA to 2mA (Note 2)
I
R
= 1.2µA, f = 0.1Hz to 10Hz
I
R
= 1.2µA
1000h at T
A
= +25°C
MAX6008A
MAX6008B
_______________________________________________________________________________________
3
1µA SOT23 Precision Shunt
Voltage Reference
MAX6006–MAX6009
ELECTRICAL CHARACTERISTICS—MAX6009
(T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Reverse Breakdown Voltage
Minimum Operating Current
Reverse Breakdown Change
with Current
Reverse Dynamic Impedance
Low-Frequency Noise
Temperature Coefficient
(Note 3)
Long-Term Drift
Thermal Hysteresis (Note 4)
TC
SYMBOL
V
R
I
RMIN
T
A
= +25°C,
I
R
= 1.2µA
I
R
= 1.2µA to 200µA
I
R
= 200µA to 2mA
I
R
= 1.2µA to 2mA (Note 2)
I
R
= 1.2µA, f = 0.1Hz to 10Hz
I
R
= 1.2µA
1000h at T
A
= +25°C
MAX6009A
MAX6009B
150
200
75
30
75
CONDITIONS
MAX6009A (0.2%)
MAX6009B (0.5%)
MIN
2.9940
2.9850
TYP
3.000
3.000
0.5
MAX
3.0060
3.0150
1.0
1.7
2.7
2.2
UNITS
V
µA
mV
Ω
µV
p-p
ppm/°C
ppm
ppm
V
R
change <0.2% from V
R
at I
R
= 1.2µA
Note 1:
Note 2:
Note 3:
Note 4:
All devices are 100% production tested at T
A
= +25°C and are guaranteed by design for T
A
= T
MIN
to T
MAX
, as specified.
This parameter is guaranteed by the “reverse breakdown change with current” test.
TC is measured by the “box” method; i.e., (V
MAX
- V
MIN
) / (T
MAX
- T
MIN
).
Thermal hysteresis is defined as the change in the +25°C output voltage after cycling the device from T
MIN
to T
MAX
.
Typical Operating Characteristics
(C
L
= 0.01µF, T
A
= +25°C, unless otherwise noted.)
MAX6006
V
OUT
vs. CURRENT
MAX6006/9-01
MAX6006/9-02
TEMPERATURE DRIFT
0.5
REFERENCE VOLTAGE CHANGE (mV)
0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-50
0
50
100
TEMPERATURE (°C)
I
R
= 1.2µA
V
OUT
= 2.5V
2.5
REVERSE VOLTAGE CHANGE (mV)
MAX6006
STARTUP
1.5V
MAX6006/9-03
2.0
1.5
0
1.0
T
A
= +85°C T
A
= -40°C
T
A
= +25°C
0.001
0.01
0.1
1
10
20ms/div
1.2µA
0.5
0
REVERSE CURRENT (mA)
4
_______________________________________________________________________________________
1µA SOT23 Precision Shunt
Voltage Reference
Typical Operating Characteristics (continued)
(C
L
= 0.01µF, T
A
= +25°C, unless otherwise noted.)
MAX6006
0.01Hz TO 10Hz NOISE
MAX6006/9-04
MAX6006–MAX6009
MAX6006
OUTPUT IMPEDANCE vs. FREQUENCY
MAX6006/9-05
MAX6009
V
OUT
vs. CURRENT
MAX6006/9-06
1000
I
R
= 6µA,
∆
I
R
= 1.2µA
2.5
REVERSE VOLTAGE CHANGE (mV)
NOISE VOLTAGE (20µ/div)
2.0
IMPEDANCE (Ω)
100
1.5
1.2µA
1.0
T
A
= -40°C
T
A
= +25°C
0.5
T
A
= +85°C
0.001
0.01
0.1
1
10
10
1
TIME (2s/div)
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
0
REVERSE CURRENT (mA)
MAX6009
STARTUP
MAX6006/9-07
MAX6009
0.01Hz TO 10Hz NOISE
MAX6006/9-08
MAX6009
OUTPUT IMPEDANCE vs. FREQUENCY
I
R
= 6µA,
∆
I
R
= 1.2µA
MAX6006/9-09
1000
3V
NOISE VOLTAGE (20µV/div)
0
1.2µA
IMPEDANCE (Ω)
100
10
1
20ms/div
TIME (2s/div)
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
_______________________________________________________________________________________
5
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