Ideal for space critical applications, the LM4040 and
LM4041 precision voltage references are available in
the subminiature SOT-23 surface-mount package.
The LM4040 is available in fixed reverse-breakdown
voltages of 2.500V, 4.096V, and 5.000V. The LM4041
is available with a fixed 1.225V or an adjustable
reverse-breakdown voltage.
The minimum operating current ranges from 60
μA
for
the LM4041-1.2 to 74
μA
for the LM4040-5.0. LM4040
versions have a maximum operating current of 15 mA.
LM4041 versions have a maximum operating current of
12 mA.
The LM4040 and LM4041 have bandgap reference
temperature drift curvature correction and low dynamic
impedance, ensuring stable reverse-breakdown
voltage accuracy over a wide range of operating
temperatures and currents.
Applications
•
•
•
•
•
•
•
•
Battery-Powered Equipment
Data Acquisition Systems
Instrumentation
Process Control
Energy Management
Product Testing
Automotive Electronics
Precision Audio Components
Package Types
LM4040/LM4041 (F
IXED
V
ERSION
)
3-Pin SOT-23
LM4041 (A
DJUSTABLE
V
ERSION
)
3-Pin SOT-23
NC
3
-
3
1
+
2
-
1
FB
2
+
2017-2018 Microchip Technology Inc.
DS20005757B-page 1
LM4040/LM4041
Typical Application Diagrams
LM4040/LM4041 Fixed Shunt
Regulator Application
LM4041 Adjustable Shunt
Regulator Application
V
S
R
S
V
S
R
S
V
R
LM4040
I
Q
+ I
L
I
L
I
Q
V
O
LM4041
Adjustable
V
O
R
1
V
O
= 1.233 (R
2
/R
1
+ 1)
R
2
Functional Block Diagrams
LM4040/LM4041 Fixed
LM4041 Adjustable
+
+
V
REF
FB
DS20005757B-page 2
2017-2018 Microchip Technology Inc.
LM4040/LM4041
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Reverse Current......................................................................................................................................................20 mA
Forward Current ......................................................................................................................................................10 mA
Maximum Output Voltage (LM4041-ADJ) ...................................................................................................................15V
Reverse Current (LM4040-2.5) .................................................................................................................60 µA to 15 mA
Reverse Current (LM4040-4.1) .................................................................................................................68 µA to 15 mA
Reverse Current (LM4040-5.0) .................................................................................................................74 µA to 15 mA
Reverse Current (LM4041-1.2) .................................................................................................................60 µA to 12 mA
Reverse Current (LM4041-ADJ) ...............................................................................................................60 µA to 12 mA
Output Voltage Range (LM4041-ADJ) ......................................................................................................... 1.24V to 10V
† Notice:
Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of the device at those or any other conditions above those indicated
in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended
periods may affect device reliability.
‡ Notice:
The device is not guaranteed to function outside its operating ratings.
Note 1:
The maximum power dissipation must be derated at elevated temperatures and is dictated by T
JMAX
(max-
imum junction temperature),
Ɵ
JA
(junction-to-ambient thermal resistance), and T
A
(ambient temperature).
The maximum allowable power dissipation at any temperature is P
DMAX
= (T
JMAX
– T
A
)/
Ɵ
JA
or the number
given in the Absolute Maximum Ratings, whichever is lower. For the LM4040 and LM4041, T
JMAX
= +125°C
and the typical thermal resistance, when board-mounted, is +326°C/W for the SOT-23 package.
2:
Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5 kΩ in series
with 100 pF. The machine model is a 200 pF capacitor discharged directly into each pin.
2017-2018 Microchip Technology Inc.
DS20005757B-page 3
LM4040/LM4041
LM4040-2.5 ELECTRICAL CHARACTERISTICS (Note
1)
T
A
= Operating Temperature Range, T
A
= T
J
= –40°C to +85°C, unless noted.
Parameters
LM4040C
Reverse-Breakdown Voltage
Reverse-Breakdown Voltage
Tolerance (Note
2)
Minimum Operating Current
Average Reverse-Breakdown
Voltage Temperature
Coefficient
Reverse-Breakdown Voltage
Change with Operating
Current Change
I
RMIN
∆V
R
/∆
T
V
R
—
—
—
—
—
—
—
—
∆V
R
/∆I
R
—
—
—
—
Reverse Dynamic Impedance
Wideband Noise
Reverse-Breakdown Voltage
Long-Term Stability
LM4040D
Reverse-Breakdown Voltage
Reverse-Breakdown Voltage
Tolerance (Note
2)
Minimum Operating Current
Average Reverse-Breakdown
Voltage Temperature
Coefficient
Note 1:
2:
I
RMIN
∆V
R
/∆
T
V
R
—
—
—
—
—
—
—
—
2.500
—
—
45
—
±20
±15
±15
—
±25
±49
65
70
—
±150
—
V
mV
mV
µA
I
R
= 100 µA, T
A
= +25°C
I
R
= 100 µA, T
A
= +25°C
I
R
= 100 µA
T
A
= +25°C
—
ppm/°C I
R
= 10 mA, T
A
= +25°C
I
R
= 1 mA
I
R
= 100 µA, T
A
= +25°C
Z
R
e
N
∆V
R
—
—
—
2.500
—
—
45
—
±20
±15
±15
0.3
—
2.5
—
0.3
35
120
—
±12
±29
60
65
—
±100
—
0.8
1.0
6.0
8.0
0.9
—
—
Ω
mV
V
mV
mV
µA
I
R
= 100 µA, T
A
= +25°C
I
R
= 100 µA, T
A
= +25°C
I
R
= 100 µA
T
A
= +25°C
—
ppm/°C I
R
= 10 mA, T
A
= +25°C
I
R
= 1 mA
I
R
= 100 µA, T
A
= +25°C
I
RMIN
≤
I
R
≤
1 mA,
T
A
= +25°C
I
RMIN
≤
I
R
≤
1 mA
1 mA
≤
I
R
≤
15 mA,
T
A
= +25°C
1 mA
≤
I
R
≤
15 mA
I
R
= 1 mA, f = 120 Hz,
I
AC
= 0.1 I
R
, T
A
= +25°C
Sym.
Min.
Typ.
Max.
Units
Conditions
µV
RMS
I
R
= 100 µA, T
A
= +25°C,
10 Hz
≤
f
≤
10 kHz
ppm
t = 1000 hrs., T
A
= +25°C
±0.1°C, I
R
= 100 µA
Specification for packaged product only.
The boldface (overtemperature) limit for Reverse-Breakdown Voltage Tolerance is defined as the room
temperature Reverse-Breakdown Voltage Tolerance ±[(∆V
R
/∆T)(65°C)(V
R
)].
∆V
R
/∆T is the V
R
tempera-
ture coefficient, 65°C is the temperature range from –40°C to the reference point of 25°C, and V
R
is the
reverse-breakdown voltage. The total overtemperature tolerance for the different grades follows:
a. C-grade: ±1.15% = ±0.5% ±100 ppm/°C × 65°C
b. D-grade: ±1.98% = ±1.0% ±150 ppm/°C × 65°C
Example: The C-grade LM4040-2.5 has an overtemperature Reverse-Breakdown Voltage tolerance of
±2.5 × 1.15% = ±29 mV.
DS20005757B-page 4
2017-2018 Microchip Technology Inc.
LM4040/LM4041
LM4040-2.5 ELECTRICAL CHARACTERISTICS (Note
1)
(CONTINUED)
T
A
= Operating Temperature Range, T
A
= T
J
= –40°C to +85°C, unless noted.
Parameters
Reverse-Breakdown Voltage
Change with Operating
Current Change
Sym.
∆V
R
/∆I
R
Min.
—
—
—
—
Reverse Dynamic Impedance
Wideband Noise
Reverse-Breakdown Voltage
Long-Term Stability
Note 1:
2:
Z
R
e
N
∆V
R
—
—
—
Typ.
0.3
—
2.5
—
0.3
35
120
Max.
1.0
1.2
8.0
10.0
1.1
—
—
Ω
Units
mV
Conditions
I
RMIN
≤
I
R
≤
1 mA,
T
A
= +25°C
I
RMIN
≤
I
R
≤
1 mA
1 mA
≤
I
R
≤
15 mA,
T
A
= +25°C
1 mA
≤
I
R
≤
15 mA
I
R
= 1 mA, f = 120 Hz,
I
AC
= 0.1 I
R
, T
A
= +25°C
µV
RMS
I
R
= 100 µA,
10 Hz
≤
f
≤
10 kHz
ppm
t = 1000 hrs., T
A
= +25°C
±0.1°C, I
R
= 100 µA
Specification for packaged product only.
The boldface (overtemperature) limit for Reverse-Breakdown Voltage Tolerance is defined as the room
temperature Reverse-Breakdown Voltage Tolerance ±[(∆V
R
/∆T)(65°C)(V
R
)].
∆V
R
/∆T is the V
R
tempera-
ture coefficient, 65°C is the temperature range from –40°C to the reference point of 25°C, and V
R
is the
reverse-breakdown voltage. The total overtemperature tolerance for the different grades follows:
a. C-grade: ±1.15% = ±0.5% ±100 ppm/°C × 65°C
b. D-grade: ±1.98% = ±1.0% ±150 ppm/°C × 65°C
Example: The C-grade LM4040-2.5 has an overtemperature Reverse-Breakdown Voltage tolerance of
Existing projects and individual teams are welcome to cooperate. It is best to be in Guangzhou or Shenzhen. If you are interested, please email yqb_box@163.com or QQ: 437395559...
Content: Design and make an electric car seesaw with a movable counterweight on one side of the starting end A of the seesaw. The position of the counterweight can be adjusted within the range of 200m...
After the alternating current is rectified by the diode, the direction becomes single, but the magnitude (current intensity) is still constantly changing. This kind of pulsating direct current cannot ...
Si24R1 is a single-chip wireless transceiver chip that works in the 2.4~2.5GHz universal ISM frequency band. The wireless transceiver includes: frequency generator , integrated embedded ARQ baseband p...
[size=4][font=宋体] As I was very busy recently and went on a business trip for two weeks, I didn't have time to try out the development board. [/font][size=12pt] After returning from the business trip,...
A brief discussion of the five stages of PLC learning . 1. Logical stage. The so-called logical stage is to realize the general logical design in the relay system . Since it is a relay system, the kno...
As cellular phones become more advanced, the power consumption of the system during operation and the power consumption during standby are also increasing. Therefore, the power management design of...[Details]
I. Introduction
In the field of power conversion, isolated converters (forward, flyback, and double-ended) with low output DC voltage all use MOSFET as the rectifier device. Since these devi...[Details]
1. Principle of displacement angle sensor
The angle sensor is used to detect angles. It has a hole in its body that fits the LEGO axle. When connected to the RCX, the angle sensor counts once ...[Details]
1. System Structure
This system is a simulation system of indoor air-conditioning temperature/humidity control system. The data acquisition and control center collects temperature/humidity...[Details]
In recent years, with the rapid development of the information industry, dot matrix LED display screens have been widely used in various advertising and information display systems such as the fina...[Details]
Investment in
the
medical device
industry has been on the rise in recent years. In the past two years, venture capital for medical devices has almost doubled, reaching $4 billion in 2007. Fr...[Details]
Today, the value of electronic components in cars accounts for 15-20% of the total vehicle. In the future, this proportion may be as high as 30-40% as more safety electronics, fuel consumption and ...[Details]
Recently, news came from the certification department that the photovoltaic grid-connected inverter of Samil New Energy Co., Ltd. (hereinafter referred to as "Samil New Energy") has once again obta...[Details]
Corelink Semiconductor has launched the CL1100-based 5-7W E27 LED lighting driver system solution DB2. This driver module meets the requirements of small size (L×W×H=5.1cm×2.1cm×1.8cm), low standby...[Details]
Introduction
In industrial control, speed measurement is often required. Generally, a contact tachometer is used. This tachometer must be placed against the center of the shaft to measure. It...[Details]
With the continuous advancement of various technologies in the field of measurement and control, the baseband subsystem of general measurement and control equipment has entered the fourth generation o...[Details]
1 Embedded Systems
Embedded System refers to a collection of computer hardware and software with specific functions or purposes, which is divided into embedded software system and embe...[Details]
Abstract: Based on the ZigBee parking lot SMS car search system, the location of the vehicle in the parking lot is sent to the owner through SMS, which is convenient for the owner to quickly find ...[Details]
Against the backdrop of global warming, energy conservation and emission reduction have become a global hotspot and focus, which has also sounded the clarion call for the take-off of the LED lighti...[Details]
Embedded System
京公网安备 11010802033920号
EEWORLD
