SNOS633H – OCTOBER 2000 – REVISED APRIL 2013
2.0-V LM4040-N Electrical Characteristics
V
R
Tolerance Grades 'C', 'D', and 'E'; Temperature Grade 'E'
Boldface limits apply for T
A
= T
J
= T
MIN
to T
MAX
;
all other limits T
A
= T
J
= 25°C. The grades C, D and E designate initial
Reverse Breakdown Voltage tolerances of ±0.5%, ±1.0% and ±2.0%, respectively.
Symbol
Parameter
Reverse Breakdown
Voltage
V
R
Reverse Breakdown
Voltage Tolerance
(3)
Minimum Operating
Current
Average Reverse
Breakdown Voltage
Temperature
Coefficient
(3)
I
R
= 10 mA
I
R
= 1 mA
I
R
= 100
μA
I
RMIN
≤
I
R
≤
1 mA
2.5
1 mA
≤
I
R
≤
15 mA
I
R
= 1 mA, f = 120 Hz,
I
AC
= 0.1 I
R
I
R
= 100
μA
10 Hz
≤
f
≤
10 kHz
t = 1000 hrs
T = 25°C ±0.1°C
I
R
= 100
μA
ΔT
=
−40°C
to +125°C
0.3
0.9
35
120
0.08
1.1
1.1
6.0
8.0
Z
R
e
N
ΔV
R
V
HYST
(1)
(2)
(3)
Reverse Dynamic
Impedance
Wideband Noise
Reverse Breakdown
Voltage Long Term
Stability
Thermal Hysteresis
(5)
8.0
10.0
8.0
10.0
±20
±15
±15
0.3
Reverse Breakdown
Voltage Change with
Operating Current
Change
(4)
0.8
1.0
1.0
1.2
1.0
1.2
±100
±150
±150
Conditions
I
R
= 100
μA
I
R
= 100
μA
45
I
RMIN
60
68
ΔV
R
/ΔT
65
73
65
73
Typical
(1)
2.048
±10
±30
±20
±50
±41
±70
LM4040CEM3
Limits
(2)
LM4040DEM3
Limits
(2)
LM4040EEM3
Limits
(2)
Units
V
mV (max)
mV (max)
μA
μA
(max)
μA
(max)
ppm/°C
ppm/°C (max)
ppm/°C
mV
mV (max)
mV (max)
mV
mV (max)
mV (max)
Ω
Ω
(max)
μV
rms
ppm
%
ΔV
R
/ΔI
R
(4)
(5)
Typicals are at T
J
= 25°C and represent most likely parametric norm.
Limits are 100% production tested at 25°C. Limits over temperature are ensured through correlation using Statistical Quality Control
(SQC) methods. The limits are used to calculate AOQL.
The boldface (over-temperature) 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 over-
temperature tolerance for the different grades in the industrial temperature range where maxΔT = 65°C is shown below:
A-grade: ±0.75% = ±0.1% ±100 ppm/°C × 65°C
B-grade: ±0.85% = ±0.2% ±100 ppm/°C × 65°C
C-grade: ±1.15% = ±0.5% ±100 ppm/°C × 65°C
D-grade: ±1.98% = ±1.0% ±150 ppm/°C × 65°C
E-grade: ±2.98% = ±2.0% ±150 ppm/°C × 65°C
The total over-temperature tolerance for the different grades in the extended temperature range where max
ΔT
= 100 °C is shown
below:
C-grade: ±1.5% = ±0.5% ±100 ppm/°C × 100°C
D-grade: ±2.5% = ±1.0% ±150 ppm/°C × 100°C
E-grade: ±3.5% = ±2.0% ±150 ppm/°C × 100°C
Therefore, as an example, the A-grade 2.5-V LM4040-N has an over-temperature Reverse Breakdown Voltage tolerance of ±2.5V ×
0.75% = ±19 mV.
Load regulation is measured on pulse basis from no load to the specified load current. Output changes due to die temperature change
must be taken into account separately.
Thermal hysteresis is defined as the difference in voltage measured at +25°C after cycling to temperature -40°C and the 25°C
measurement after cycling to temperature +125°C.
Copyright © 2000–2013, Texas Instruments Incorporated
7
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