LM4040-N, LM4040Q-N
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SNOS633H –OCTOBER 2000–REVISED APRIL 2013
2.5-V LM4040-N Electrical Characteristics
VR Tolerance Grades 'C', 'D', and 'E'; Temperature Grade 'I' (AEC Grade 3)
Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. The grades C, D and E designate initial
Reverse Breakdown Voltage tolerances of ±0.5%, ±1.0% and ±2.0%, respectively.
LM4040CIZ
LM4040DIZ
LM4040DIM3
LM4040DIM7
LM4040EIZ
LM4040EIM3
LM4040EIM7
LM4040CIM3
Typical(1) LM4040CIM7
Symbol
Parameter
Conditions
Units
LM4040QCIM3 LM4040QDIM3 LM4040QEIM3
Limits(2)
Limits(2)
Limits(2)
Reverse Breakdown
Voltage
IR = 100 μA
2.500
45
V
VR
±12
±25
±50
mV (max)
mV (max)
μA
Reverse Breakdown
Voltage Tolerance(3)
IR = 100 μA
±29
±49
±74
Minimum Operating
Current
IRMIN
60
65
65
μA (max)
μA (max)
ppm/°C
ppm/°C (max)
ppm/°C
mV
65
70
70
Average Reverse
Breakdown Voltage
Temperature
IR = 10 mA
IR = 1 mA
±20
±15
±15
0.3
±100
±150
±150
ΔVR/ΔT
Coefficient(3)
IR = 100 μA
I
RMIN ≤ IR ≤ 1 mA
0.8
1.0
1.0
mV (max)
mV (max)
mV
Reverse Breakdown
Voltage Change with
Operating Current
Change(4)
1.0
1.2
1.2
ΔVR/ΔIR
2.5
1 mA ≤ IR ≤ 15 mA
6.0
8.0
8.0
mV (max)
mV (max)
Ω
8.0
10.0
10.0
0.3
35
Reverse Dynamic
Impedance
IR = 1 mA, f = 120 Hz
IAC = 0.1 IR
ZR
eN
0.9
1.1
1.1
Ω(max)
IR = 100 μA
10 Hz ≤ f ≤ 10 kHz
Wideband Noise
μVrms
Reverse Breakdown
Voltage Long Term
Stability
t = 1000 hrs
T = 25°C ±0.1°C
IR = 100 μA
ΔVR
120
ppm
%
VHYST Thermal Hysteresis(5) ΔT= −40°C to +125°C
0.08
(1) Typicals are at TJ = 25°C and represent most likely parametric norm.
(2) 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.
(3) The boldface (over-temperature) limit for Reverse Breakdown Voltage Tolerance is defined as the room temperature Reverse
Breakdown Voltage Tolerance ±[(ΔVR/ΔT)(maxΔT)(VR)]. Where, ΔVR/ΔT is the VR temperature coefficient, maxΔT is the maximum
difference in temperature from the reference point of 25°C to T MIN or TMAX, and VR 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.
(4) 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.
(5) 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.
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