TL1431-EP_15 Datasheet, PDF (5/23 Pages) Texas Instruments – TL1431-EP Precision-Programmable Reference

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TL1431-EP
SLVS529D – APRIL 2004 – REVISED JANUARY 2015
7.6 Electrical Characteristics
at specified free-air temperature, I_KA = 10 mA (unless otherwise noted)
PARAMETER
TEST CONDITIONS
T_A ⁽¹⁾
V_I(ref) Reference input voltage
V_KA = V_I(ref)
V_I(dev)
DV_I(ref)
DV_KA
Deviation of reference input
voltage over full temperature
range ⁽²⁾
Ratio of change in reference
input voltage to the change in
cathode voltage
V_KA = V_I(ref)
ΔV_KA = 3 to 36 V
I_I(ref)
I_I(dev)
I_min
Reference input current
R1 = 10 kΩ,
Deviation of reference input
current over full temperature
range ⁽²⁾
Minimum cathode current for
regulation
R1 = 10 kΩ,
V_KA = V_I(ref)
R2 = ∞
R2 = ∞
I_off
|z_KA|
Off-state cathode current
Output impedance⁽³⁾
V_KA = 36 V,
V_I(ref) = 0
V_KA = V_I(ref), ƒ ≤ 1 kHz,
I_KA = 1 to 100 mA
25°C
Full range
Full range
Full range
25°C
Full range
Full range
25°C
25°C
Full range
25°C
TEST
CIRCUIT
Figure 8
Figure 8
Figure 9
Figure 9
Figure 9
Figure 8
Figure 10
Figure 8
MIN
2490
2470
TYP
2500
17
MAX UNIT
2510
mV
2530
mV
–1.1
–2 mV/V
1.5
2.5
μA
4
0.5
μA
0.45
1 mA
0.18
0.5
μA
2
0.2
0.4 Ω
(1) Full range is –40°C to 125°C for Q-suffix devices; –55°C to 125°C for M-suffix devices.
(2)
The deviation parameters V_I(dev) and I_I(dev) are defined as the
rated temperature range. The average full-range temperature
differences between the maximum and minimum values obtained
coefficient of the reference input voltage ^αVI(ref) is defined as:
over
the
| ( ) ^{( ) αVI(ref)}
ppm
°C
=
VI(dev)
° ^{VI(ref) at 25 C}
ΔT_A
× 10⁶
Max V_I(ref)
where:
ΔT_A is the rated operating temperature range of the device.
V_I(dev)
Min V_I(ref)
ΔT_A
(3)
αVI(ref) _{is positive or negative, depending on}
z_KA =
The output impedance is defined as:
whether
ΔV_KA
Δ I_KA
minimum
V_I(ref)
or
maximum
V_I(ref),
respectively,
occurs
at
the
lower
temperature.
When the device is operating with two external resistors (see Figure 9), the total dynamic impedance of the circuit is given by:
( ) ^,
|z | =
ΔV
ΔI
,
which
is
approximately
equal
to
z_KA
=
1+
R1
R2
.
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