Datasheet

(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 limit over the full temperature range for the reverse breakdown voltage tolerance is defined as:
[V
RTOL
] ±[(∆V
R
/ ∆T) X (max∆T) X (V
R
)]
where ∆V
R
/ ∆T is the V
R
temperature coefficient, max∆T is the difference from the +25°C reference point to T
MIN
or T
MAX
,
and V
R
is the reverse breakdown voltage.
The total tolerance over the full temperature range for the different grades where max∆T = +100°C is shown below:
• A grade: ±0.6% = ±0.1% ±50ppm/°C x 100°C
• B grade: ±0.7% = ±0.2% ±50ppm/°C x 100°C
• C grade: ±1.0% = ±0.5% ±50ppm/°C x 100°C
Note 3: Guaranteed by design.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Reverse Breakdown Voltage V
R
T
A
= +25°C
LM4050A (0.1%) 4.9950 5.0000 5.0050
VLM4050B (0.2%) 4.9900 5.0000 5.0100
LM4050C (0.5%) 4.9750 5.0000 5.0250
Reverse Breakdown Voltage
Tolerance (Note 2)
V
RTOL
LM4050A ±5.0 ±30
mVLM4050B ±10 ±35
LM4050C ±25 ±50
Minimum Operating Current I
RMIN
54 80 µA
Average Reverse Voltage
Temperature Coefcient
(Notes 2, 3)
DV
R
/DT
I
R
= 10mA ±30
ppm/°CI
R
= 1mA ±20 ±50
I
R
= 100µA ±15
Reverse Breakdown Voltage
Change with Operating
Current Change
I
RMIN
≤ I
R
≤ 1mA 0.5 1.4
mV
1mA ≤ I
R
≤ 15mA 3.5 12.0
Reverse Dynamic
Impedance (Note 3)
Z
R
I
R
= 1mA, f = 120Hz, I
AC
= 0.1I
R
0.5 1.1 Ω
Wideband Noise e
N
I
R
= 100µA, 10Hz ≤ f ≤ 10kHz 80 µV
RMS
Reverse Breakdown Voltage
Long-Term Stability
DV
R
T = 1000h 120 ppm
LM4050/LM4051 50ppm/°C Precision Micropower Shunt Voltage
References with Multiple Reverse Breakdown Voltages
www.maximintegrated.com
Maxim Integrated │ 7
Electrical Characteristics—5.000V