LM4040 Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages Electrical Characteristics—5.000V (IR = 100μA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS LM4040A (0.1%) 4.995 5.000 5.005 LM4040B (0.2%) 4.990 5.000 5.010 Reverse Breakdown Voltage VR TA = +25°C V LM4040C (0.5%) 4.975 5.000 5.025 LM4040D (1.0%) 4.950 5.000 5.050 LM4040A ±5.0 ±38 Reverse Breakdown Voltage LM4040B ±10 ±43 Tolerance (Note 2) VR mV LM4040C ±25 ±58 LM4040D ±50 ±99 LM4040A/B/C 54 80 Minimum Operating Current IRMIN µA LM4040D 54 85 IR = 10mA ±30 Average Reverse Voltage LM4040A/B/C ±20 ±100 Temperature Coefficient ∆VR/∆T IR = 1mA ppm/°C (Notes 2 and 3) LM4040D ±20 ±150 IR = 100µA ±15 LM4040A/B/C 0.5 1.4 Reverse Breakdown Voltage IRMIN ≤ I ≤ 1mA R LM4040D 0.5 1.8 Change with Operating mV Current Change LM4040A/B/C 3.5 12.0 1mA ≤ IR ≤ 15mA LM4040D 3.5 15.0 Reverse Dynamic IR = 1mA, f = 120Hz, LM4040A/B/C 0.5 1.1 Impedance (Note 3) ZR I Ω AC = 0.1IR LM4040D 0.5 1.5 Wideband Noise eN IR = 100µA, 10Hz ≤ f ≤ 10kHz 80 µVRMS Reverse Breakdown Voltage Long-Term Stability ∆VR T = 1000h 120 ppm Note 1: All devices are 100% production tested at TA = +25°C and are guaranteed by design for TA = TMIN to TMAX, as specified. Note 2: The overtemperature limit for Reverse Breakdown Voltage Tolerance is defined as the room-temperature Reverse Breakdown Voltage Tolerance ±[(∆VR/∆T)(max∆T)(VR)], where ∆VR/∆T is the VR temperature coefficient, max∆T is the max- imum difference in temperature from the reference point of +25°C to TMIN or TMAX, and VR is the reverse breakdown volt- age. The total overtemperature tolerance for the different grades in the temperature range where max∆T = +65°C is shown below: A grade: ±0.75% = ±0.1% ±100ppm/°C x 65°C B grade: ±0.85% = ±0.2% ±100ppm/°C x 65°C C grade: ±1.15% = ±0.5% ±100ppm/°C x 65°C D grade: ±1.98% = ±1.0% ±150ppm/°C x 65°C The total over-temperature tolerance for the different grades in the extended temperature range where max ∆T = +100°C is shown below: A grade: ±1.1% = ±0.1% ±100ppm/°C x 100°C B grade: ±1.2% = ±0.2% ±100ppm/°C x 100°C C grade: ±1.5% = ±0.5% ±100ppm/°C x 100°C D grade: ±2.5% = ±1.0% ±150ppm/°C x 100°C Therefore, as an example, the A-grade LM4040-2.5 has an over-temperature reverse breakdown voltage tolerance of ±2.5V x 0.75% = ±19mV. Note 3: Guaranteed by design. www.maximintegrated.com Maxim Integrated │ 8