LT1009 Datasheet, PDF (4/22 Pages) Texas Instruments – 2.5-V INTEGRATED REFERENCE CIRCUITS

LT1009
SLVS013N – MAY 1987 – REVISED MAY 2009................................................................................................................................................................. www.ti.com
ELECTRICAL CHARACTERISTICS
at specified free-air temperature
PARAMETER
TEST CONDITIONS
T_A ⁽¹⁾
V_Z
V_F
ΔV_Z(temp)
αV_Z
ΔV_Z
ΔV_Z/Δt
Z_Z
Reference voltage
I_Z = 1 mA
D/PW package
LP package
D/PW package
LP package
25°C
Full range
Forward voltage
Adjustment range
Change in reference
voltage with
temperature
I_F = 2 mA
I_Z = 1 mA,
V_ADJ = GND to V_Z
I_Z = 1 mA,
V_ADJ = 0.6 V to V_Z – 0.6 V
D/PW package
LP package
25°C
25°C
Full range
Average temperature
coefficient of
I_Z = 1 mA, V_ADJ = open
reference voltage⁽²⁾
0°C to 70°C
–40°C to 85°C
Change in reference
voltage with current
I_Z = 400 µA to 10 mA
25°C
Full range
Long-term change in
reference voltage
I_Z = 1 mA
25°C
Reference impedance I_Z = 1 mA
25°C
Full range
LT1009C
MIN TYP MAX
2.49 2.5 2.51
2.495 2.5 2.505
2.485
2.515
2.491
2.509
0.4
1
125
45
5
4
15
25
2.6
10
12
20
0.3
1
1.4
LT1009I
MIN TYP MAX
2.49 2.5 2.51
2.495 2.5 2.505
2.475
2.525
2.48
2.52
0.4
1
UNIT
V
V
125
mV
45
15
mV
15
15
25 _ppm/
20
35 ^°C
2.6
6
mV
10
20
ppm/
khr
0.3
1
Ω
1.4
(1) Full range is 0°C to 70°C for the LT1009C and –40°C to 85°C for the LT1009I.
(2) The deviation parameter V_Z(dev) is defined as the difference between the maximum and minimum values obtained over the
recommended operating temperature range, measured at I_Z = 1 mA. The average full-range temperature coefficient of the reference
voltage (αV_Z) is defined as:
|aV_Z|
ppm
°C
=
V_Z(dev)
× 10⁶
V_Z at 25°C
DT_A
Maximum V_Z
Minimum V_Z
DT_A
V_Z(dev) at I_Z = 1 mA
αV_Z can be positive or negative, depending upon whether the minimum V_Z or maximum V_Z, respectively, occurs at the lower
temperature.
For example, at I_Z = 1 mA, maximum V_Z = 2501 mV at 30°C, minimum V_Z = 2497 mV at 0°C, V_Z = 2500 mV at 25°C, ΔT_A = 70°C for
LT1009C:
|aV_Z| =
4 mV
× 10⁶
2500 mV
ppm
70°C
» 23 _°C
Because minimum V_Z occurs at the lower temperature, the coefficient in this example is positive.
4
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