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6.19 LM4040A82I, LM4040B82I Electrical Characteristics

at industrial temperature range, full-range TA = –40°C to 85°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

LM4040A82I

LM4040B82I

UNIT

MIN

TYP

MAX

MIN

TYP

MAX

Reverse breakdown voltage

IZ = 150μA

25°C

8.192

ΔVZ

Reverse breakdown voltage

tolerance

IZ = 150μA

25°C

–8.2

8.2

–16

Full range

–61

–70

IZ,min

Minimum cathode current

25°C

106

μA

Full range

110

αVZ

Average temperature coefficient

of reverse breakdown voltage (2)

IZ = 10mA

25°C

±40

ppm/°C

IZ = 1mA

25°C

±20

Full range

±100

IZ = 150μA

25°C

±20

DVZ

DIZ

Reverse breakdown voltage

change with cathode current

change

IZ,min < IZ < 1mA

25°C

0.6

1.3

0.6

1.6

Full range

2.5

1mA < IZ < 15mA

25°C

Full range

Reverse dynamic impedance

IZ = 1mA, f = 120Hz,

IAC = 0.1 IZ

25°C

0.6

1.5

0.6

1.5

Ω

Wideband noise

IZ = 150μA,

10Hz ≤ f ≤ 10kHz

25°C

130

μVRMS

Long-term stability of reverse

breakdown voltage

t = 1000 h,

TA = 25°C ± 0.1°C,

IZ = 150μA

120

ppm

VHYST Thermal hysteresis(1)

ΔTA = –40°C to 125°C

0.08%

—

(1)

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.

(2)

The overtemperature 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 overtemperature

tolerance for the different grades in the industrial 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 max ΔT = 100 °C is shown

below:

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 2.5V LM4040 has an overtemperature Reverse Breakdown Voltage tolerance of ±2.5V × 0.75%

= ±19mV.

LM4040A, LM4040B, LM4040C, LM4040D

SLOS456O – JANUARY 2005 – REVISED JUNE 2024

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