MAXIM MAX6008B

19-1730; Rev 0; 8/00
1µA SOT23 Precision Shunt
Voltage Reference
Features
♦ Ultra-Low Operating Current: Guaranteed <1µA
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 temperature coefficient of 30ppm/°C over the extended temperature 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.
♦ Temperature Range: -40°C to +85°C
________________________Applications
Battery-Powered Equipment
Portable Meters
Precision Regulators
A/D and D/A Converters
♦ Small 3-Pin SOT23 Package
♦ Initial Voltage Accuracy: 0.2%
♦ Temperature Coefficient: 30ppm/°C max
♦ Factory-Trimmed Output Voltages: +1.25V,
+2.048V, +2.5V, +3.0V
♦ Wide Operating Range: 1µA to 2mA
Selector Guide
PART
OUTPUT
VOLTAGE
(V)
MAX6006A
1.25
0.2
30
MAX6006B
1.25
0.5
75
INITIAL
TEMPERATURE
ACCURACY COEFFICIENT
(%)
(ppm/°C)
MAX6007A
2.048
0.2
30
MAX6007B
2.048
0.5
75
MAX6008A
2.5
0.2
30
MAX6008B
2.5
0.5
75
MAX6009A
3.0
0.2
30
MAX6009B
3.0
0.5
75
Ordering Information appears at end of data sheet
Typical Operating Circuit
VS
IRMIN + IL
Pin Configuration
MAX6006
MAX6007
MAX6008
MAX6009
TOP VIEW
RBIAS
IL
VR
VOUT
OUT 1
N.C.
1
8
OUT
N.C.
2
7
N.C.
N.C.
3
6
OUT
GND 4
5
N.C.
IRMIN
MAX6006
MAX6007
MAX6008
MAX6009
V -V
RBIAS = S R
IL + IRMIN
3
0.01µF
GND 2
I.C.
SOT23-3
SO
________________________________________________________________ Maxim Integrated Products
1
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MAX6006–MAX6009
General Description
The MAX6006–MAX6009 ultra-low-power shunt references are ideal for space-critical and low-power applications. 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%.
MAX6006–MAX6009
1µA SOT23 Precision Shunt
Voltage Reference
ABSOLUTE MAXIMUM RATINGS
Operating Current (OUT to GND) ......................................20mA
Forward Current (GND to OUT) ..........................................20mA
Continuous Power Dissipation (TA = +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
(TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
Reverse Breakdown Voltage
VR
Minimum Operating Current
IRMIN
Reverse Breakdown Change
with Current
CONDITIONS
TA = +25°C,
IR = 1.2µA
MIN
TYP
MAX
MAX6006A (0.2%)
1.2475
1.2500
1.2525
MAX6006B (0.5%)
1.2438
1.2500
1.2563
VR change <0.2% from VR at IR = 1.2µA
IR = 200µA to 2mA
2.0
IR = 1.2µA to 2mA (Note 2)
Low-Frequency Noise
IR = 1.2µA, f = 0.1Hz to 10Hz
Long-Term Drift
Thermal Hysteresis (Note 4)
2
TC
1.0
1.0
Reverse Dynamic Impedance
Temperature Coefficient
(Note 3)
0.5
IR = 1.2µA to 200µA
IR = 1.2µA
1000h at TA = +25°C
1.5
UNITS
V
µA
mV
Ω
µVp-p
30
MAX6006A
30
MAX6006B
75
ppm/°C
150
ppm
200
ppm
_______________________________________________________________________________________
1µA SOT23 Precision Shunt
Voltage Reference
(TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
Reverse Breakdown Voltage
VR
Minimum Operating Current
IRMIN
Reverse Breakdown Change
with Current
CONDITIONS
TA = +25°C,
IR = 1.2µA
MIN
TYP
MAX
MAX6007A (0.2%)
2.0439
2.048
2.0521
MAX6007B (0.5%)
2.0378
2.048
2.0582
VR change <0.2% from VR at IR = 1.2µA
IR = 200µA to 2mA
2.3
IR = 1.2µA to 2mA (Note 2)
Low-Frequency Noise
IR = 1.2µA, f = 0.1Hz to 10Hz
TC
Long-Term Drift
1.0
1.3
Reverse Dynamic Impedance
Temperature Coefficient
(Note 3)
0.5
IR = 1.2µA to 200µA
IR = 1.2µA
1.8
MAX6007A
30
MAX6007B
75
Thermal Hysteresis (Note 4)
V
µA
mV
Ω
µVp-p
50
1000h at TA = +25°C
UNITS
ppm/°C
150
ppm
200
ppm
ELECTRICAL CHARACTERISTICS—MAX6008
(TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
Reverse Breakdown Voltage
VR
Minimum Operating Current
IRMIN
Reverse Breakdown Change with
Current
TA = +25°C,
IR = 1.2µA
CONDITIONS
MAX6008A (0.2%)
MIN
2.4950
TYP
2.5000
MAX
2.5050
MAX6008B (0.5%)
2.4875
2.5000
2.5125
0.5
1.0
VR change <0.2% from VR at IR = 1.2µA
IR = 1.2µA to 200µA
1.5
IR = 200µA to 2mA
2.5
Reverse Dynamic Impedance
IR = 1.2µA to 2mA (Note 2)
Low-Frequency Noise
IR = 1.2µA, f = 0.1Hz to 10Hz
Temperature Coefficient
(Note 3)
Long-Term Drift
TC
IR = 1.2µA
1000h at TA = +25°C
Thermal Hysteresis (Note 4)
2
60
UNITS
V
µA
mV
Ω
µVp-p
MAX6008A
30
MAX6008B
75
ppm/°C
150
ppm
200
ppm
_______________________________________________________________________________________
3
MAX6006–MAX6009
ELECTRICAL CHARACTERISTICS—MAX6007
ELECTRICAL CHARACTERISTICS—MAX6009
(TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
Reverse Breakdown Voltage
VR
Minimum Operating Current
IRMIN
CONDITIONS
TA = +25°C,
IR = 1.2µA
MIN
TYP
MAX
MAX6009A (0.2%)
2.9940
3.000
3.0060
MAX6009B (0.5%)
2.9850
3.000
3.0150
VR change <0.2% from VR at IR = 1.2µA
Reverse Breakdown Change
with Current
IR = 200µA to 2mA
2.7
IR = 1.2µA to 2mA (Note 2)
IR = 1.2µA, f = 0.1Hz to 10Hz
IR = 1.2µA
TC
Long-Term Drift
2.2
MAX6009A
30
MAX6009B
75
1000h at TA = +25°C
UNITS
V
µA
mV
Ω
µVp-p
75
Thermal Hysteresis (Note 4)
Note 1:
Note 2:
Note 3:
Note 4:
1.0
1.7
Low-Frequency Noise
Temperature Coefficient
(Note 3)
0.5
IR = 1.2µA to 200µA
Reverse Dynamic Impedance
ppm/°C
150
ppm
200
ppm
All devices are 100% production tested at TA = +25°C and are guaranteed by design for TA = TMIN to TMAX, as specified.
This parameter is guaranteed by the “reverse breakdown change with current” test.
TC is measured by the “box” method; i.e., (VMAX - VMIN) / (TMAX - TMIN).
Thermal hysteresis is defined as the change in the +25°C output voltage after cycling the device from TMIN to TMAX .
Typical Operating Characteristics
(CL = 0.01µF, TA = +25°C, unless otherwise noted.)
MAX6006
VOUT vs. CURRENT
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
0
50
TEMPERATURE (°C)
100
MAX6006/9-03
2.0
1.5V
1.5
0
1.0
TA = +85°C TA = -40°C
0.5
1.2µA
TA = +25°C
0
-50
4
2.5
MAX6006
STARTUP
MAX6006/9-02
0
IR = 1.2µA
VOUT = 2.5V
REVERSE VOLTAGE CHANGE (mV)
0.5
MAX6006/9-01
TEMPERATURE DRIFT
REFERENCE VOLTAGE CHANGE (mV)
MAX6006–MAX6009
1µA SOT23 Precision Shunt
Voltage Reference
0.001
0.01
0.1
1
10
20ms/div
REVERSE CURRENT (mA)
_______________________________________________________________________________________
1µA SOT23 Precision Shunt
Voltage Reference
1.2µA
IR = 6µA,
∆IR = 1.2µA
100
10
2.5
1
TIME (2s/div)
1
10
1.0
TA = -40°C
TA = +25°C
0.5
1000
TA = +85°C
0.001
0.01
0.1
1
10
REVERSE CURRENT (mA)
MAX6009
0.01Hz TO 10Hz NOISE
MAX6009
OUTPUT IMPEDANCE vs. FREQUENCY
1000
IR = 6µA,
∆ IR = 1.2µA
IMPEDANCE (Ω)
1.2µA
1.5
FREQUENCY (kHz)
NOISE VOLTAGE (20µV/div)
0
100
MAX6006/9-08
0.1
MAX6006/9-07
3V
2.0
0
0.01
MAX6009
STARTUP
MAX6006/9-06
MAX6006/9-05
MAX6009
VOUT vs. CURRENT
REVERSE VOLTAGE CHANGE (mV)
1000
IMPEDANCE (Ω)
NOISE VOLTAGE (20µ/div)
MAX6006/9-04
MAX6006
OUTPUT IMPEDANCE vs. FREQUENCY
MAX6006/9-09
MAX6006
0.01Hz TO 10Hz NOISE
100
10
1
20ms/div
TIME (2s/div)
0.01
0.1
1
10
100
1000
FREQUENCY (kHz)
_______________________________________________________________________________________
5
MAX6006–MAX6009
Typical Operating Characteristics (continued)
(CL = 0.01µF, TA = +25°C, unless otherwise noted.)
MAX6006–MAX6009
1µA SOT23 Precision Shunt
Voltage Reference
Pin Description
PIN
NAME
FUNCTION
SOT23
SO
1
6, 8
OUT
Output Voltage. Bias OUT with a pullup resistor to a potential greater than OUT. Bypass OUT
to GND with a 0.01µF or larger capacitor.
2
4
GND
Ground
3
—
IC
—
1, 2, 3, 5,
7
N.C.
Internally connected test point. Leave this pin unconnected, or connect to GND.
No connection. Not internally connected.
Detailed Description
Typical Applications
The MAX6006–MAX6009 are precision, two-terminal,
series bandgap voltage references. On-chip thin-film
resistors are laser trimmed to provide 0.2% output voltage accuracies. Voltages of +1.25V, +2.048V,+2.5V,
and +3.0V are available in the space-saving SOT23
package (2.1mm ✕ 2.7mm).
In the typical shunt regulator application shown in
Figure 1, RBIAS is used to set the current through the
load (IL) and the current through the shunt regulator
(IRMIN). There are two worst-case situations that RBIAS
needs to be sized for:
1) RBIAS must be small enough that when VS (supply
voltage) is at its minimum and IL is at its maximum,
IRMIN is equal to at least the minimum operating
current of the shunt regulator.
2) RBIAS must be large enough that when VS is at its
maximum and IL is at its minimum, IRMIN is <2mA.
Applications Information
Output/Load Capacitance
For devices in this family, OUT needs to be bypassed
to GND with a 0.01µF or larger capacitor. In applications where the load or the supply can experience step
changes, additional capacitance will reduce the
amount of overshoot (or undershoot) and assist the circuit’s transient response.
Output Voltage Hysteresis
Output voltage hysteresis is the change in the output
voltage at TA = +25°C before and after the device is
cycled over its entire operating temperature range.
Hysteresis is caused by differential package stress
appearing across the bandgap core transistors. The
temperature hysteresis value is typically less than
200ppm.
Turn-On Time
The output capacitance and bias current of the
MAX6006–MAX6009 greatly affects turn-on settling
time. In the Typical Operating Characteristics, turn-on
time is shown with a 10nF output capacitor and a 1.2µA
bias current. Under these conditions, the MAX6006–
MAX6009 settle in 40ms. Settling time will linearly
decrease in proportion to the circuit’s bias current.
6
VS
IRMIN + IL
RBIAS
IL
VR
VOUT
IRMIN
MAX6006
MAX6007
MAX6008
MAX6009
V -V
RBIAS = S R
IL + IRMIN
Figure 1. Typical Application Circuit
_______________________________________________________________________________________
1µA SOT23 Precision Shunt
Voltage Reference
R1
200k
+10V MAX6008
R1
200k
4
5
4
5
1
3
1
MAX4162EUK
3
MAX4162EUK
2
2
IOUT
IOUT
R2
-1.0V TO -7V
IOUT =
MAX6006–MAX6009
MAX6008
R2
+1.0V TO +7V
2.5V
R2
-10V
Figure 2. Precision 1µA to 1mA Current Sources
Ordering Information
PART
MAX6006AEUR-T
TEMP.
RANGE
-40°C to +85°C
PINPACKAGE
3 SOT23
TOP
MARK
FZGH
MAX6006AESA
-40°C to +85°C
8 SO
MAX6006BEUR-T
-40°C to +85°C
3 SOT23
MAX6006BESA
-40°C to +85°C
8 SO
MAX6007AEUR-T
-40°C to +85°C
3 SOT23
MAX6007BEUR-T
-40°C to +85°C
3 SOT23
FZGL
MAX6008AEUR-T
-40°C to +85°C
3 SOT23
FZGN
MAX6008AESA
-40°C to +85°C
8 SO
MAX6008BEUR-T
-40°C to +85°C
3 SOT23
MAX6008BESA
-40°C to +85°C
8 SO
MAX6009AEUR-T
-40°C to +85°C
3 SOT23
FZGQ
MAX6009BEUR-T
-40°C to +85°C
3 SOT23
FZGR
Chip Information
TRANSISTOR COUNT: 60
PROCESS: BiCMOS
—
FZGI
—
FZGK
—
FZGO
—
_______________________________________________________________________________________
7
1µA SOT23 Precision Shunt
Voltage Reference
SOTPO3L.EPS
MAX6006–MAX6009
Package Information
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
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Printed USA
is a registered trademark of Maxim Integrated Products.