LM185-2.5/
LM285-2.5/LM385-2.5
The
q
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2)
SYMBOL
V
Z
PARAMETER
Reverse Breakdown Voltage
CONDITIONS
T
A
= 25°C, 20µA
≤
I
R
≤
20mA
LM185-2.5/285-2.5
LM385-2.5
LM385B-2.5 (Note 3)
20µA
≤
I
R
≤
20mA (Note 3)
T
MIN
≤
T
A
≤
T
MAX
20µA
≤
I
R
≤
1mA
T
A
= 25°C
T
MIN
≤
T
A
≤
T
MAX
1mA
≤
I
R
≤
20mA
T
A
= 25°C
T
MIN
≤
T
A
≤
T
MAX
r
Z
Reverse Dynamic Impedance
I
R
= 100µA (Note 4)
T
A
= 25°C
T
MIN
≤
T
A
≤
T
MAX
10Hz
≤
f
≤
10kHz, I
R
= 100µA
T
A
= 25°C
±
0.1°C, I
R
= 100µA
q
ELECTRICAL CHARACTERISTICS
LM185-2.5/285-2.5
MIN
TYP
MAX
2.462
2.500
2.538
LM385-2.5/385B-2.5
MIN
TYP MAX
UNITS
V
V
V
ppm/°C
2.425
2.462
20
8
20
1.0
1.5
10
20
0.2
q
2.500 2.575
2.500 2.538
20
8
20
2.0
2.5
20
25
0.4
120
20
1.0
1.5
∆V
Z
∆Temp
I
MIN
∆V
Z
∆I
R
Average Temperature Coefficient
Minimum Operating Current
Reverse Breakdown Voltage
Change With Current
µA
mV
mV
mV
mV
Ω
Ω
µV
ppm/kHr
q
q
0.6
1.5
e
n
∆V
Z
∆Time
Wide Band Noise (RMS)
Long Term Stability
120
20
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
All specifications are for T
A
= 25°C unless otherwise noted. For the
LM185-2.5 T
MIN
= – 55°C and T
MAX
= 125°C. For LM285-2.5, T
MIN
= –
40°C and T
MAX
= 85°C. For LM385-2.5, T
MIN
= 0°C and T
MAX
= 70°C.
Note 3:
For very low initial tolerance, consult LT1004 data sheet. The
LT1004 is a low cost, pin for pin substitution device. For guaranteed
temperature coefficient consult the LT1034-2.5 data sheet.
Note 4:
Guaranteed but not tested.
3
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