Datasheet

LM4041
Improved Precision Micropower
Shunt Voltage Reference
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(I
R
= 100µA, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
Note 1: All devices are 100% production tested at +25°C and are guaranteed by design for T
A
= T
MIN
to T
MAX
, as specified.
Note 2: The overtemperature limit for Reverse Breakdown Voltage Tolerance is defined as the room-temperature Reverse
Breakdown Voltage Tolerance ±[(ΔV
R
/ ΔT)(maxΔT)(V
R
)], where ΔV
R
/ ΔT is the V
R
temperature coefficient, maxΔT is the
maximum difference in temperature from the reference point of +25°C to T
MIN
or T
MAX
, and V
R
is the reverse breakdown
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.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Wideband Noise e
N
I
R
= 100μA, 10Hz ≤ f ≤ 10kHz 20 μV
RMS
Reverse Breakdown Voltage
Long-Term Stability
ΔV
R
T = 1000h, I
R
= 100μA 120 ppm
TEMPERATURE DRIFT
LM4041 toc02
TEMPERATURE (°C)
REFERENCE VOLTAGE CHANGE (mV)
1007550250-25
-2
-1
0
1
-3
-50 125
REVERSE VOLTAGE vs. CURRENT
LM4041 toc03
SOURCE CURRENT (mA)
REVERSE VOLTAGE CHANGE (mV)
15105
1
2
3
4
5
6
0
020
T
A
= +25°C
T
A
= -40°C
T
A
= +125°C
T
A
= +85°C
Typical Operating Characteristics
(I
R
= 100µA, SC70-3 package, T
A
= +25°C, unless otherwise noted.)
0
20
60
40
80
100
0 0.80.4 1.2 1.6 2.0
REVERSE CHARACTERISTICS AND
MINIMUM OPERATING CURRENT
LM4041-01
REVERSE VOLTAGE (V)
REVERSE CURRENT (µA)