LM4041CEX3-1.2-T [MAXIM]
Improved Precision Micropower Shunt Voltage Reference; 改进的精密微功耗并联型电压基准
| 型号： | LM4041CEX3-1.2-T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Improved Precision Micropower Shunt Voltage Reference |
| 文件： | 总7页 (文件大小：143K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1704; Rev 5; 1/09
Improved Precision Micropower
Shunt Voltage Reference
General Description
Features
The LM4041 is a precision two-terminal shunt mode,
bandgap voltage reference with a fixed reverse break-
down voltage of 1.225V. Ideal for space-critical appli-
cations, the LM4041 is offered in the subminiature 3-pin
♦ Ultra-Small 3-Pin SC70 Package
♦ 0.1% (max) Initial Accuracy
♦ 100ppm/°C (max) Temperature Coefficient
Guaranteed over -40°C to +125°C Temperature
Range
✕
SC70 surface-mount package (1.8mm 1.8mm), 50%
smaller than comparable devices in SOT23 surface-
mount packages (SOT23 versions are also available).
♦ Wide Operating Current Range: 60µA to 12mA
Laser-trimmed resistors ensure precise initial accuracy.
With a 100ppm/°C temperature coefficient, the device
is offered in four grades of initial accuracy ranging from
0.1% to 1%. The LM4041 has a 60µA to 12mA shunt
current capability with low dynamic impedance, ensur-
ing stable reverse-breakdown voltage accuracy over a
wide range of operating temperatures and currents.
♦ Low 20µV
Output Noise (10Hz to 10kHz)
RMS
♦ 1.225V Fixed Reverse Breakdown Voltage
♦ No Output Capacitors Required
♦ Tolerates Capacitive Loads
Ordering Information
The LM4041 does not require an external stabilizing
capacitor while ensuring stability with any capacitive
load.
PIN-
TOP
PART
TEMP RANGE
PACKAGE MARK
LM4041AIX3-1.2+T
-40°C to +85°C
3 SC70-3 ABF
3 SOT23-3 FZEB
ALB
LM4041AEM3-1.2+T -40°C to +125°C 3 SOT23-3 FZNC
The LM4041 is guaranteed over the temperature range
-40°C to +125°C.
LM4041AIM3-1.2+T
-40°C to +85°C
LM4041AEX3-1.2+T -40°C to +125°C 3 SC70-3
LM4041BIX3-1.2+T
-40°C to +85°C
3 SC70-3
3 SOT23-3 FZEC
ALC
LM4041BEM3-1.2+T -40°C to +125°C 3 SOT23-3 FZND
LM4041CIX3-1.2+T -40°C to +85°C 3 SC70-3 ABH
LM4041CIM3-1.2+T -40°C to +85°C 3 SOT23-3 FZED
LM4041CEX3-1.2+T -40°C to +125°C 3 SC70-3 ALD
LM4041CEM3-1.2+T -40°C to +125°C 3 SOT23-3 FZNE
ABG
LM4041BIM3-1.2+T
-40°C to +85°C
________________________Applications
LM4041BEX3-1.2+T -40°C to +125°C 3 SC70-3
Portable, Battery-Powered Equipment
Notebook Computers
Cell Phones
Industrial Process Controls
LM4041DIX3-1.2+T
-40°C to +85°C
3 SC70-3
ABI
FZEE
ALE
LM4041DIM3-1.2+T -40°C to +85°C
3 SOT23-3
LM4041DEX3-1.2+T -40°C to +125°C 3 SC70-3
LM4041DEM3-1.2+T -40°C to +125°C 3 SOT23-3 FZNF
Pin Configuration
Note: For leaded version, contact factory.
*See Selector Guide for a listing of LM4041 Output Voltage,
Initial Accuracy, and Temperature Coefficient specifications.
+Denotes a lead(Pb)-free/RoHS-compliant package.
TOP VIEW
Selector Guide
+
1
2
INITIAL
OUTPUT
3
N.C.*
TEMPCO
(ppm/°C)
LM4041
PART
ACCURACY VOLTAGE
(%)
(V)
-
LM4041A___-1.2-T
LM4041B___-1.2-T
LM4041C___-1.2-T
LM4041D___-1.2-T
0.1
0.2
0.5
1.0
1.225
1.225
1.225
1.225
100
100
100
150
SC70-3/SOT23-3
*PIN 3 MUST BE LEFT FLOATING OR CONNECTED TO PIN 2.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Improved Precision Micropower
Shunt Voltage Reference
ABSOLUTE MAXIMUM RATINGS
Reverse Current (cathode to anode) ..................................20mA
Forward Current (anode to cathode) ..................................10mA
Operating Temperature Range
LM4041_I_ _ _..................................................-40°C to +85°C
LM4041_E_ _ _ ..............................................-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
3-Pin SOT23 (derate 4.01mW/°C above +70°C)..........320mW
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
(I = 100µA, T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
MAX A
R
A
MIN
PARAMETER
SYMBOL
CONDITIONS
LM4041A (0.1%)
MIN
TYP
MAX
UNITS
1.2238 1.2250 1.2262
1.2226 1.2250 1.2275
1.2189 1.2250 1.2311
1.2128 1.2250 1.2373
LM4041B (0.2%)
LM4041C (0.5%)
LM4041D (1.0%)
LM4041A (0.1%)
LM4041B (0.2%)
LM4041C (0.5%)
LM4041D (1.0%)
LM4041A/B/C
Reverse Breakdown Voltage
V
T
A
= +25°C
V
R
1.2
2.4
6.0
12
9.2
10.4
14
Reverse Breakdown Voltage
Tolerance (Note 2)
ΔV
mV
μA
R
24
45
60
Minimum Operating Current
I
RMIN
LM4041D
45
65
I
I
I
I
= 10mA
= 1mA
20
R
Average Reverse Voltage
Temperature Coefficient
(Notes 2 and 3)
LM4041A/B/C
LM4041D
15
100
150
ΔV /ΔT
ppm/°C
R
R
15
= 100μA
15
R
LM4041A/B/C
LM4041D
0.7
0.7
2.5
2.5
0.5
0.5
1.5
2.0
8.0
10.0
1.5
2.0
≤ I ≤ 1mA
R
RMIN
Reverse Breakdown Voltage
Change with Operating
Current Change
ΔV /ΔI
mV
R
R
LM4041A/B/C
LM4041D
1mA ≤ I ≤ 12mA
R
LM4041A/B/C
LM4041D
Reverse Dynamic
Impedance (Note 3)
I
I
= 1mA, f = 120Hz,
= 0.1I
R
R
Z
Ω
R
AC
2
_______________________________________________________________________________________
Improved Precision Micropower
Shunt Voltage Reference
ELECTRICAL CHARACTERISTICS (continued)
(I = 100µA, T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
MAX A
R
A
MIN
PARAMETER
Wideband Noise
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
μV
RMS
e
I
R
= 100μA, 10Hz ≤ f ≤ 10kHz
20
N
Reverse Breakdown Voltage
Long-Term Stability
ΔV
T = 1000h, I = 100μA
120
ppm
R
R
Note 1: All devices are 100% production tested at +25°C and are guaranteed by design for T = T
to T , as specified.
MAX
A
MIN
Note 2: The overtemperature limit for Reverse Breakdown Voltage Tolerance is defined as the room-temperature Reverse
Breakdown Voltage Tolerance ± ±(ΔV / ΔT)(maxΔT)(V )], where ΔV / ΔT is the V temperature coefficient, maxΔT is the
R
R
R
R
maximum difference in temperature from the reference point of +25°C to T
or T
, and V is the reverse breakdown
MIN
MAX R
voltage. The total overtemperature tolerance for the different grades in the temperature range where maxΔT = +65°C is
shown below:
A grade: ± 0.75% = ± 0.1% ± 100ppm/°C 65°C
B grade: ± 0.85% = ± 0.2% ± 100ppm/°C 65°C
C grade: ± 1.15% = ± 0.5% ± 100ppm/°C 65°C
✕
✕
✕
✕
D grade: ± 1.98% = ± 1.0% ± 150ppm/°C 65°C
The total overtemperature tolerance for the different grades in the extended temperature range where maxΔT = +100°C is
shown below:
A grade: ± 1.1% = ± 0.1% ± 100ppm/°C 100°C
B grade: ± 1.2% = ± 0.2% ± 100ppm/°C 100°C
C grade: ± 1.5% = ± 0.5% ± 100ppm/°C 100°C
✕
✕
✕
✕
D grade: ± 2.5% = ± 1.0% ± 150ppm/°C 100°C
Therefore, as an example, the A-grade LM4041-1.2 has an overtemperature reverse breakdown voltage tolerance of ± 2.5V
x 0.75% = ± 19mV.
Note 3: Guaranteed by design.
Typical Operating Characteristics
(I = 100µA, SC70-3 package, T = +25°C, unless otherwise noted.)
R
A
REVERSE CHARACTERISTICS AND
MINIMUM OPERATING CURRENT
TEMPERATURE DRIFT
REVERSE VOLTAGE vs. CURRENT
1
0
6
5
4
3
2
1
0
100
80
60
40
20
0
T
= +85°C
A
T
= +125°C
A
-1
-2
-3
T
= +25°C
A
T
= -40°C
A
0
0.4
0.8
1.2
1.6
2.0
-50 -25
0
25
50
75 100 125
0
5
10
15
20
REVERSE VOLTAGE (V)
TEMPERATURE (°C)
SOURCE CURRENT (mA)
_______________________________________________________________________________________
3
Improved Precision Micropower
Shunt Voltage Reference
Typical Operating Characteristics (continued)
(I = 100µA, SC70-3 package, T = +25°C, unless otherwise noted.)
R
A
LOAD-TRANSIENT RESPONSE
LOAD-TRANSIENT RESPONSE
LOAD-TRANSIENT RESPONSE
LM4041-06
LM4041-04
LM4041-05
2V/div
2V/div
2V/div
2mV/div
2mV/div
2mV/div
I
= 100μA 25μA,
I
= 1mA 250μA,
I
= 10mA 2.5mA,
SHUNT
L
SHUNT
L
SHUNT
L
R = 100kΩ
SEE FIGURE 1
R = 10kΩ
SEE FIGURE 1
R = 1kΩ
SEE FIGURE 1
10μs/div
10μs/div
10μs/div
NOISE vs. FREQUENCY
OUTPUT IMPEDANCE vs. FREQUENCY
STARTUP CHARACTERISTICS
10,000
1000
100
10
I
= 200μA
R
R
= 30kΩ
S
C = 0
1
SEE FIGURE 2
5V
V
IN
OV
1000
1.5V
1.0V
150μA
=
I
R
V
OUT
O.5V
1
C = 1μF
1
0V
I
= 1mA
10k
R
100
0.1
10
100
1k
10k
100
1k
100k
1M
0
4
8
12
16
FREQUENCY (Hz)
FREQUENCY (Hz)
RESPONSE TIME (μs)
I
SHUNT
R
S
30kΩ
1kΩ
+
-
V
B
R
L
V
IN
V
R
V
R
1Hz RATE
V
GEN
Figure 1. Load-Transient Test Circuit
Figure 2. Startup Characteristics Test Circuit
4
_______________________________________________________________________________________
Improved Precision Micropower
Shunt Voltage Reference
Pin Description
PIN
1
NAME
+
FUNCTION
Positive Terminal of the Shunt Reference
2
−
Negative Terminal of the Shunt Reference
3
N.C.
Leave this pin unconnected, or connect to pin 2.
Detailed Description
V
S
The LM4041 shunt references use the bandgap princi-
ple to produce a stable, accurate voltage. The device
behaves similarly to an ideal zener diode; a fixed volt-
age of +1.225V is maintained across its output termi-
nals when biased with 60µA to 12mA of reverse
current. The LM4041 behaves similarly to a silicon
diode when biased with forward currents up 10mA.
I
+ I
SHUNT LOAD
R
S
I
LOAD
V
R
Figure 3 shows a typical operating circuit. The LM4041
is ideal for providing a stable reference from a high-
voltage power supply.
I
SHUNT
LM4041
Applications Information
The LM4041’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
current (I
SHUNT
) range, supply voltage (V ) variations,
, and desired quiescent current.
LOAD
S
V
Figure 3. Typical Operating Circuit
Choose the value of R when V is at a minimum and
S
S
I
is at a maximum. Maintain a minimum I
of
LOAD
SHUNT
used. Ensure that the resistor’s power rating is ade-
quate, using the following general power equation:
60µA at all times. The R value should be large enough
S
to keep I
less than 12mA for proper regulation
SHUNT
✕
when V is maximum and I
prevent damage to the device, I
exceed 20mA.
is at a minimum. To
P = I
(V
- V )
S(MAX) R
S
LOAD
R
SHUNT
should never
SHUNT
Output Capacitance
The LM4041 does not require an external capacitor for
frequency stability and is stable for any output capaci-
tance.
Therefore, the value of R is bounded by the following
S
equation:
±V
S(MIN)
±V
S(MAX)
- V ] / ±60µA + I
] > R >
R
LOAD(MAX) S
]
LOAD(MIN)
Temperature Performance
The LM4041 typically exhibits an output voltage tem-
perature coefficient within ± 15ppm/°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.
- V ] / ±20mA + I
R
Choosing a larger resistance minimizes the total power
dissipation in the circuit by reducing the shunt current
✕
(P
= V
I
). Provide a safety margin to
SHUNT
D(TOTAL)
S
incorporate the worst-case tolerance of the resistor
_______________________________________________________________________________________
5
Improved Precision Micropower
Shunt Voltage Reference
+125°C, the part operates at 159.56°C, thereby
High Temperature Operation
The maximum junction temperature of the LM4041 is
+150°C. The maximum operating temperature for the
LM4041_E_ is +125°C. At a maximum load current of
15mA and a maximum output voltage of 5V, the part
will dissipate 75mW of power. The power dissipation
limits of the 3-pin SC70 call for a derating value of
2.17mW/°C above +70°C and thus for 75mW of power
dissipation, the part will selfheat to 35.56°C above
ambient temperature. If the ambient temperature is
exceeding the maximum junction temperature value of
+150°C. For high-temperature operation, care must be
taken to ensure the combination of ambient tempera-
ture, output power dissipation, and package thermal
resistance does not conspire to raise the device tem-
perature beyond that listed in the Absolute Maximum
Ratings. Either reduce the output load current or the
ambient temperature to keep the part within the limits.
Chip Information
TRANSISTOR COUNT: 60
Package Information
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in
the package code indicates RoHS status only. Package draw-
ings may show a different suffix character, but the drawing per-
tains to the package regardless of RoHS status.
PROCESS: BiCMOS
PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
3 SC70-3
X3-2
U3-1
21-0075
21-0051
3 SOT23-3
6
_______________________________________________________________________________________
Improved Precision Micropower
Shunt Voltage Reference
Revision History
REVISION REVISION
PAGES
DESCRIPTION
CHANGED
NUMBER
DATE
5
1/09
Changed part numbers to indicate lead-free
1
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 _____________________ 7
© 2010 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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