MAX6138CEXR21+T [MAXIM]
Two Terminal Voltage Reference, 1 Output, 2.048V, BICMOS, PDSO3, ULTRA SMALL, SC-70, 3 PIN;
| 型号： | MAX6138CEXR21+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Two Terminal Voltage Reference, 1 Output, 2.048V, BICMOS, PDSO3, ULTRA SMALL, SC-70, 3 PIN 电源电路 参考电压源 光电二极管 信息通信管理 |
| 文件： | 总13页 (文件大小：331K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-2090; Rev 2; 4/04
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
General Description
Features
The MAX6138 is a precision, two-terminal shunt mode,
bandgap voltage reference available in fixed reverse
breakdown voltages of 1.2205V, 2.048V, 2.5V, 3.0V,
3.3V, 4.096V, and 5.0V. Ideal for space-critical applica-
tions, the MAX6138 is offered in the subminiature 3-pin
SC70 surface-mount package (1.8mm X 1.8mm), 50%
smaller than comparable devices in SOT23 surface-
mount packages.
o Ultra-Small 3-Pin SC70 Package
o 0.1% (max) Initial Accuracy
o 25ppm/°C (max) Temperature Coefficient
Guaranteed Over -40°C to +85°C Temperature
Range
o Wide Operating Current Range: 60µA to 15mA
o Low 28µV
Output Noise (10Hz to 10kHz)
RMS
Laser-trimmed resistors ensure precise initial accuracy.
With a 25ppm/°C temperature coefficient, the device is
offered in three grades of initial accuracy ranging from
0.1% to 0.5%. The MAX6138 has a 60µA to 15mA shunt-
current capability with low-dynamic impedance, ensuring
stable reverse breakdown voltage accuracy over a wide
range of operating temperatures and currents.
o 1.2205V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V, and 5.0V
Fixed Reverse Breakdown Voltages
o No Output Capacitors Required
o Stable with Capacitive Loads
Selector Guide
The MAX6138 does not require an external stabilizing
capacitor while ensuring stability with capacitive loads.
The MAX6138 is a higher precision device in a smaller
package than the LM4040/LM4050.
OUTPUT
VOLTAGE
(V)
TEMP
RANGE
PIN-
PART
PACKAGE
Applications
Portable, Battery-Powered Equipment
Notebook Computers
MAX6138_EXR12-T -40°C to +85°C 3 SC70-3
MAX6138_EXR21-T -40°C to +85°C 3 SC70-3
MAX6138_EXR25-T -40°C to +85°C 3 SC70-3
MAX6138_EXR30-T -40°C to +85°C 3 SC70-3
MAX6138_EXR33-T -40°C to +85°C 3 SC70-3
MAX6138_EXR41-T -40°C to +85°C 3 SC70-3
MAX6138_EXR50-T -40°C to +85°C 3 SC70-3
Ordering Information appears at end of data sheet.
1.2205
2.0480
2.5000
3.0000
3.3000
4.0960
5.0000
Cell Phones
Industrial Process Control
Typical Operating Circuit
V
S
Pin Configuration
I
+ I
SHUNT LOAD
R
S
TOP VIEW
I
LOAD
V
R
+
1
2
3
N.C.*
I
SHUNT
MAX6138
-
MAX6138
SC70
*PIN 3 MUST BE LEFT FLOATING
OR CONNECTED TO PIN 2.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
ABSOLUTE MAXIMUM RATINGS
Reverse Current (cathode to anode) ..................................20mA
Forward Current (anode to cathode) ..................................10mA
Operating Temperature Range .........................-40°C to +125°C
Storage Temperature Range.............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Continuous Power Dissipation (T = +70°C)
A
3-Pin SC70 (derate 2.17mW/°C above +70°C) ...........174mW
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—MAX6138_12 (1.2205V)
(I = 100µA, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
R
A
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX6138A (0.1%)
MAX6138B (0.2%)
1.2193
1.2181
1.2205
1.2205
1.2217
1.2229
Reverse Breakdown Voltage
(Note 2)
V
T
A
= +25°C
V
R
MAX6138C (0.5%)
1.2144
1.2205
45
1.2266
60
Minimum Operating Current
I
µA
RMIN
TC
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)
4
25
ppm/°C
I
≤ I ≤ 1mA
0.3
2.5
1.0
8.0
Reverse Breakdown Voltage
Change with Operating
Current Change
RMIN
R
∆V /∆I
mV
R
R
1mA ≤ I ≤ 12mA
R
Reverse Dynamic
Impedance (Note 3)
Z
e
I
I
= 1mA, f = 120Hz, I = 0.1I
R
0.3
0.8
Ω
R
R
AC
Wideband Noise
= 10µA, 10Hz ≤ f ≤ 10kHz
20
µV
RMS
N
R
t = 1000h
Reverse Breakdown Voltage
∆V
120
ppm
R
2
_______________________________________________________________________________________
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
ELECTRICAL CHARACTERISTICS—MAX6138_21 (2.048V)
(I = 100µA, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
R
A
A
PARAMETER
SYMBOL
CONDITIONS
MAX6138A (0.1%)
MIN
TYP
2.0480
2.0480
2.0480
45
MAX
2.0500
2.0521
2.0582
65
UNITS
V
2.0460
2.0439
2.0378
Reverse Breakdown
Voltage (Note 2)
V
T
A
= +25°C
MAX6138B (0.2%)
MAX6138C (0.5%)
R
Minimum Operating Current
I
µA
RMIN
TC
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)
4
25
ppm/°C
Reverse Breakdown
Voltage Change with
Operating Current Change
I
≤ I ≤ 1mA
0.3
2.5
1.0
8.0
RMIN
R
∆V /∆I
mV
R
R
1mA ≤ I ≤ 15mA
R
Reverse Dynamic
Impedance (Note 3)
Z
e
I
= 1mA, f = 120Hz, I = 0.1I
R
0.3
28
0.8
Ω
R
R
AC
Wideband Noise
10Hz ≤ f ≤ 10kHz
µV
RMS
N
Reverse Breakdown
Voltage Long-Term Stability
∆V
t = 1000h
120
ppm
R
ELECTRICAL CHARACTERISTICS—MAX6138_25 (2.5V)
(I = 100µA, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
R
A
A
PARAMETER
SYMBOL
CONDITIONS
MAX6138A (0.1%)
MIN
TYP
MAX
UNITS
2.4975
2.4950
2.4875
2.5000
2.5000
2.5000
45
2.5025
2.5050
2.5125
65
Reverse Breakdown Voltage
(Note 2)
V
R
T
A
= +25°C
V
MAX6138B (0.2%)
MAX6138C (0.2%)
Minimum Operating Current
I
µA
RMIN
TC
Reverse Voltage Temperature
Coefficient (Notes 2, 3)
4
25
ppm/°C
Reverse Breakdown Voltage
Change with Operating Current
Change
∆V /∆I
I
≤ I ≤ 1mA
R
0.3
1.0
mV
R
R
RMIN
Reverse Breakdown Voltage
Change with Operating Current
Change
∆V /∆I
1mA ≤ I ≤ 15mA
2.5
8.0
0.8
mV
R
R
R
Reverse Dynamic Impedance
(Note 3)
Z
I
R
= 1mA, f = 120Hz, I = 0.1I
R
0.3
35
Ω
R
AC
Wideband Noise
e
10Hz ≤ f ≤ 10kHz
µV
RMS
N
Reverse Breakdown Voltage
Long-Term Stability
∆V
t = 1000h
120
ppm
R
_______________________________________________________________________________________
3
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
ELECTRICAL CHARACTERISTICS—MAX6138_30 (3.0V)
(I = 100µA, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
R
A
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
3.0030
3.0060
UNITS
MAX6138A (0.1%)
MAX6138B (0.2%)
2.9970
2.9940
3.0000
3.0000
Reverse Breakdown
Voltage (Note 2)
V
T
A
= +25°C
V
R
MAX6138C (0.5%)
2.9850
3.0000
3.0150
Minimum Operating
Current
I
45
65
µA
RMIN
TC
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)
4
25
ppm/°C
Reverse Breakdown
Voltage Change with
Operating Current Change
I
≤ I ≤ 1mA
0.3
2.5
1.0
8.0
RMIN
R
∆V /∆I
mV
R
R
1mA ≤ I ≤ 15mA
R
Reverse Dynamic
Impedance (Note 3)
Z
e
I
= 1mA, f =120Hz, I = 0.1I
R
0.3
45
0.8
Ω
R
R
AC
Wideband Noise
10Hz ≤ f ≤ 10kHz
µV
RMS
N
Reverse Breakdown
Voltage Long-Term
Stability
∆V
t = 1000h
120
ppm
R
ELECTRICAL CHARACTERISTICS—MAX6138_33 (3.3V)
(I = 100µA, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
R
A
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
3.3033
3.3066
UNITS
V
MAX6138A (0.1%)
MAX6138B (0.2%)
3.2967
3.2934
3.3000
3.3000
Reverse Breakdown
Voltage (Note 2)
V
T
A
= +25°C
R
MAX6138C (0.5%)
3.2835
3.3000
45
3.3165
67
Minimum Operating Current
I
µA
RMIN
TC
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)
4
25
ppm/°C
Reverse Breakdown
Voltage Change with
Operating Current Change
I
≤ I ≤ 1mA
0.3
1.0
8.0
RMIN
R
∆V /∆I
mV
R
R
1mA ≤ I ≤ 15mA
R
Reverse Dynamic
Impedance (Note 3)
Z
e
I
= 1mA, f =120Hz, I = 0.1I
R
0.3
50
0.8
Ω
R
R
AC
Wideband Noise
10Hz ≤ f ≤ 10kHz
µV
RMS
N
Reverse Breakdown
Voltage Long-Term
Stability
∆V
t = 1000h
120
ppm
R
4
_______________________________________________________________________________________
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
ELECTRICAL CHARACTERISTICS—MAX6138_41 (4.096V)
(I = 100µA, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
R
A
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX6138A (0.1%)
MAX6138B (0.2%)
MAX6138C (0.5%)
4.0919
4.0878
4.0755
4.0960
4.0960
4.0960
4.1001
4.1042
4.1165
Reverse Breakdown
Voltage (Note 2)
V
T
A
= +25°C
V
R
Minimum Operating
Current
I
50
73
µA
RMIN
TC
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)
4
25
ppm/°C
Reverse Breakdown
Voltage Change with
Operating Current Change
I
≤ I ≤ 1mA
0.5
3.0
1.2
RMIN
R
∆V /∆I
mV
R
R
1mA ≤ I ≤ 15mA
10.0
R
Reverse Dynamic
Impedance (Note 3)
Z
I
= 1mA, f = 120Hz, I = 0.1I
R
0.5
64
1.0
Ω
R
R
AC
Wideband Noise
e
10Hz ≤ f ≤ 10kHz
µV
RMS
N
Reverse Breakdown
Voltage Long-Term
Stability
∆V
t = 1000h
120
ppm
R
ELECTRICAL CHARACTERISTICS—MAX6138_50 (5.0V)
(I = 100µA, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
R
A
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
5.0000
5.0000
5.0000
54
MAX
5.0050
5.0100
5.0250
80
UNITS
V
MAX6138A (0.1%)
MAX6138B (0.2%)
MAX6138C (0.5%)
4.9950
4.9900
4.9750
Reverse Breakdown
Voltage (Note 2)
V
T
A
= +25°C
R
Minimum Operating Current
I
µA
RMIN
TC
Reverse Voltage
Temperature Coefficient
(Notes 2, 3)
4
25
ppm/°C
Reverse Breakdown
Voltage Change with
Operating Current Change
I
≤ I ≤ 1mA
0.5
3.5
1.4
RMIN
R
∆V /∆I
mV
R
R
1mA ≤ I ≤ 15mA
12.0
R
Reverse Dynamic
Impedance (Note 3)
Z
e
I
= 1mA, f = 120Hz, I = 0.1I
R
0.5
80
1.1
Ω
R
R
AC
Wideband Noise
10Hz ≤ f ≤ 10kHz
µV
RMS
N
Reverse Breakdown
Voltage Long-Term Stability
∆V
t = 1000h
120
ppm
, as specified.
R
Note 1: All devices are 100% production tested at +25°C and are guaranteed by correlation for T = T
to T
MIN
A
MAX
Note 2: TC is measured by the “box” method, i.e. (V
Note 3: Guaranteed by design.
- V
) / (T
- T
)
MAX
MIN
MAX
MIN
_______________________________________________________________________________________
5
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
Typical Operating Characteristics
(I = 100µA, T = +25°C, unless otherwise noted.)
R
A
MAX6138_12
TEMPERATURE DRIFT
REVERSE CHARACTERISTICS AND
MINIMUM OPERATING CURRENT
MAX6138_25
TEMPERATURE DRIFT
2.5015
2.5010
2.5005
2.5000
2.4995
2.4990
2.4895
2.4890
1.2215
1.2210
1.2205
1.2200
1.2195
6
5
4
3
2
1
0
MAX6138_50
MAX6138_41
MAX6138_30
MAX6138_25
MAX6138_20
MAX6138_12
3 TYPICAL PARTS
-40 -20
3 TYPICAL PARTS
0
20
40
60
80
-40
-20
0
20
40
60
80
0
20
40
60
80
100
TEMPERATURE (°C)
TEMPERATURE (°C)
REVERSE CURRENT (µA)
MAX6138_12
REVERSE VOLTAGE vs. I
MAX6138_50
TEMPERATURE DRIFT
SHUNT
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
5.003
5.002
5.001
5.000
4.999
4.998
4.997
T
= +85°C
A
T
= +25°C
A
T
= -40°C
A
3 TYPICAL PARTS
4.996
-40
-20
0
20
40
60
80
0
5
10
(mA)
15
20
TEMPERATURE (°C)
I
SHUNT
6
_______________________________________________________________________________________
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
Typical Operating Characteristics (continued)
(I = 100µA, T = +25°C, unless otherwise noted.)
R
A
MAX6138_25
REVERSE VOLTAGE vs. I
MAX6138_50
REVERSE VOLTAGE vs. I
SHUNT
SHUNT
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
T
= +85°C
A
T
= +85°C
A
T
= +25°C
A
T
= +25°C
A
T = -40°C
A
T
= -40°C
A
0
5
10
15
20
0
5
10
15
20
I
(mA)
I
(mA)
SHUNT
SHUNT
MAX6138_25
LOAD-TRANSIENT RESPONSE
MAX6138_12
LOAD-TRANSIENT RESPONSE
MAX6138 toc09
MAX6138 toc08
+25µA
+25µA
-25µA
-25µA
V
AC-COUPLED
V
AC-COUPLED
R
R
10mV/div
10mV/div
10µs/div
4µs/div
= 100µA 25µA
I
= 100µA
I
SHUNT
R = 100kΩ
L
SHUNT
R = 48kΩ
L
I
+ I
SHUNT LOAD
1kΩ
+
-
V
B
R
L
V
R
V
GEN
Figure 1. Load-Transient Circuit
_______________________________________________________________________________________
7
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
Typical Operating Characteristics (continued)
(I = 100µA, T = +25°C, unless otherwise noted.)
R
A
MAX6138_50
LOAD-TRANSIENT RESPONSE
MAX6138_12
LOAD-TRANSIENT RESPONSE
MAX6138 toc10
MAX6138 toc11
+25µA
-25µA
+250µA
-250µA
V
AC-COUPLED
V AC-COUPLED
R
2.0mV/div
R
20mV/div
40µs/div
10µs/div
I
= 100µA
I
= 1mA
SHUNT
L
SHUNT
R = 100kΩ
L
R = 10kΩ
MAX6138_50
LOAD-TRANSIENT RESPONSE
MAX6138_25
LOAD-TRANSIENT RESPONSE
MAX6138 toc13
MAX6138 toc12
+250µA
-250µA
+250µA
-250µA
V
AC-COUPLED
V
AC-COUPLED
R
R
2mV/div
10mV/div
40µs/div
10µs/div
I
= 1mA
I
= 1mA
SHUNT
R = 10kΩ
L
SHUNT
R = 10kΩ
L
R
S
V
IN
V
R
1Hz RATE
50%
DUTY CYCLE
Figure 2. Startup Characteristics Test Circuit
_______________________________________________________________________________________
8
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
Typical Operating Characteristics (continued)
(I = 100µA, T = +25°C, unless otherwise noted.)
R
A
MAX6138_12
LOAD-TRANSIENT RESPONSE
MAX6138_25
LOAD-TRANSIENT RESPONSE
MAX6138 toc14
MAX6138 toc15
+2.5mA
-2.5mA
+2.5mA
-2.5mA
V
AC-COUPLED
V AC-COUPLED
R
5mV/div
R
100mV/div
10µs/div
10µs/div
I
= 10mA
I
= 10mA
SHUNT
L
SHUNT
R = 1kΩ
L
R = 1kΩ
MAX6138_12
STARTUP CHARACTERISTICS
MAX6138_50
LOAD-TRANSIENT RESPONSE
MAX6138 toc17
MAX6138 toc16
5V
+2.5mA
-2.5mA
V
IN
0
1.2V
0
V
AC-COUPLED
R
100mV/div
V
OUT
200ns/div
40µs/div
I
= 100µA
SHUNT
I
= 10mA
SHUNT
R = 1kΩ
L
R
= 30kΩ
S
MAX6138_12
OUTPUT IMPEDANCE
vs. FREQUENCY
MAX6138_25
STARTUP CHARACTERISTICS
MAX6138_50
STARTUP CHARACTERISTICS
MAX6138 toc18
MAX6138 toc19
1000
C = 0
L
5V
5V
V
IN
V
IN
100
10
1
0
2V
0
5V
150µA
=
I
R
0
V
OUT
V
OUT
C = 1µF
L
0
I
= 1mA
10k
R
0.1
2µs/div
100µs/div
100
1k
100k
1M
I
= 100µA
I
= 100µA
SHUNT
FREQUENCY (Hz)
SHUNT
R
= 30kΩ
R = 16kΩ
S
S
_______________________________________________________________________________________
9
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
Typical Operating Characteristics (continued)
(I = 100µA, T = +25°C, unless otherwise noted.)
R
A
MAX6138_25
OUTPUT IMPEDANCE vs. FREQUENCY
MAX6138_50
OUTPUT IMPEDANCE vs. FREQUENCY
1000
100
10
1
C = 0
L
C = 1µF
L
100
10
I
= 150µA
R
I
= 150µA
R
C = 0
L
I = 1mA
R
1
C = 1µF
L
I
= 1mA
R
0.1
0.1
0.1
1
10
100
1000
0.1
1
10
100
1000
FREQUENCY (Hz)
FREQUENCY (Hz)
MAX6138_25
NOISE vs. FREQUENCY
MAX6138_12
NOISE vs. FREQUENCY
MAX6138 toc23
10,000
1000
100
10,000
1000
100
1
10
100
1k
10k
1
10
100
1k
10k
FREQUENCY (Hz)
FREQUENCY (Hz)
MAX6138_50
NOISE vs. FREQUENCY
10,000
1000
100
1
10
100
1k
10k
FREQUENCY (Hz)
10 ______________________________________________________________________________________
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
Pin Description
PIN
1
NAME
FUNCTION
+
-
Positive Terminal of the Shunt Reference
2
Negative Terminal of the Shunt Reference
3
N.C.
No Connection. Leave this pin unconnected or connect to Pin 2.
Detailed Description
V
S
The MAX6138 shunt reference uses the bandgap prin-
ciple to produce a stable, accurate voltage. The device
behaves similarly to an ideal zener diode; a fixed volt-
age is maintained across its output terminals when
biased with 60µA to 15mA of reverse current. The
MAX6138 behaves similarly to a silicon diode when
biased with forward currents up to 10mA.
I
+ I
SHUNT LOAD
R
S
I
LOAD
V
R
I
SHUNT
Figure 3 shows a typical operating circuit. The
MAX6138 is ideal for providing a stable reference from
a high-voltage power supply.
MAX6138
Applications Information
The MAX6138’s internal pass transistor is used to main-
tain a constant output voltage (V ) by sinking the
SHUNT
necessary amount of current across a source resistor.
The source resistance (R ) is determined from the load
S
Figure 3. Typical Operating Circuit
current (I
) range, supply voltage (V ) variations,
LOAD
S
V
, and desired quiescent current.
SHUNT
Output Capacitance
Choose the value of R when V is at a minimum and
S
S
The MAX6138 does not require an external capacitor
for operational stability and is stable for any output
capacitance.
I
is at a maximum. Maintain a minimum I
of
LOAD
SHUNT
60µA at all times. The R value should be large enough
S
to keep I
less than 15mA for proper regulation
when V is maximum and I
prevent damage to the device, I
exceed 20mA.
SHUNT
Temperature Performance
The MAX6138 typically exhibits an output voltage tem-
perature coefficient within 4ppm/°C. The polarity of
the temperature coefficient may be different from one
device to another; some may have positive coefficients,
and others may have negative coefficients.
is at a minimum. To
LOAD
S
should never
SHUNT
Therefore, the value of R is bounded by the following
S
equation:
[V
- V ] / [60µA + I
] > R >
LOAD(MAX) S
S(MIN)
R
[V
S(MAX
) - V ] / [20mA + I
]
LOAD(MIN)
R
Chip Information
TRANSISTOR COUNT: 70
Choosing a larger resistance minimizes the total power
dissipation in the circuit by reducing the shunt current
PROCESS: BiCMOS
(P
= V X I
). Provide a safety margin to
D(TOTAL)
S
SHUNT
incorporate the worst-case tolerance of the resistor
used. Ensure that the resistor’s power rating is ade-
quate, using the following general power equation:
PD = I
✕ (V
- V
)
SHUNT
R
SHUNT
S(MAX)
______________________________________________________________________________________ 11
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
Ordering Information
OUTPUT
VOLTAGE
(V)
INITIAL
ACCURACY
(%)
PART
TEMP RANGE
PIN-PACKAGE
TOP MARK
MAX6138AEXR12-T
MAX6138BEXR12-T
MAX6138CEXR12-T
MAX6138AEXR21-T
MAX6138BEXR21-T
MAX6138CEXR21-T
MAX6138AEXR25-T
MAX6138BEXR25-T
MAX6138CEXR25-T
MAX6138AEXR30-T
MAX6138BEXR30-T
MAX6138CEXR30-T
MAX6138AEXR33-T
MAX6138BEXR33-T
MAX6138CEXR33-T
MAX6138AEXR41-T
MAX6138BEXR41-T
MAX6138CEXR41-T
MAX6138AEXR50-T
MAX6138BEXR50-T
MAX6138CEXR50-T
1.2205
1.2205
1.2205
2.0480
2.0480
2.0480
2.5000
2.5000
2.5000
3.0000
3.0000
3.0000
3.3000
3.3000
3.3000
4.0960
4.0960
4.0960
5.0000
5.0000
5.0000
0.1
0.2
0.5
0.1
0.2
0.5
0.1
0.2
0.5
0.1
0.2
0.5
0.1
0.2
0.5
0.1
0.2
0.5
0.1
0.2
0.5
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
3 SC70-3
AEW
AEX
AEY
AFA
AFB
AFC
AFE
AFF
AFG
AFI
AFJ
AFK
ANG
ANH
ANI
AFM
AFN
AFO
AFQ
AFR
AFS
12 ______________________________________________________________________________________
0.1%, 25ppm, SC70 Shunt Voltage Reference
with Multiple Reverse Breakdown Voltages
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13
© 2004 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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