TL1431M_15 Datasheet, PDF (5/32 Pages) Texas Instruments – PRECISION PROGRAMMABLE REFERENCE

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TL1431
SLVS062M – DECEMBER 1991 – REVISED APRIL 2012
Electrical Characteristics
at specified free-air temperature, I_KA = 10 mA (unless otherwise noted)
PARAMETER
TEST CONDITIONS
T_A ⁽¹⁾
TEST
CIRCUIT
V_I(ref)
V_I(dev)
∆V_I(ref)
∆V_KA
I_I(ref)
I_I(dev)
I_min
I_off
|z_KA|
Reference input voltage V_KA = V_I(ref)
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 V to 36 V
Reference input current R1 = 10 kΩ, R2 = ∞
Deviation of reference
input current over full
temperature range⁽²⁾
Minimum cathode
current for regulation
R1 = 10 kΩ, R2 = ∞
V_KA = V_I(ref)
Off-state cathode
current
V_KA = 36 V, V_I(ref) = 0
Output impedance⁽⁴⁾
V_KA = V_I(ref), f ≤ 1 kHz,
I_KA = 1 mA 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
Figure 1
Figure 1
Figure 2
Figure 2
Figure 2
Figure 1
Figure 3
Figure 1
TL1431Q
MIN TYP MAX
2490 2500 2510
2470
2530
TL1431M
UNIT
MIN TYP MAX
2475 2500 2540
2460
mV
2550
17
55
17 55⁽³⁾ mV
–1.1
–2
1.5 2.5
4
0.5
2
0.45
1
0.18 0.5
2
0.2 0.4
–1.1
–2 mV/V
1.5 2.5
μA
5
0.5 3⁽³⁾ 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 and –55°C to 125°C for M-suffix devices.
(2) The deviation parameters V_I(dev) and I_I(dev) are defined as the differences between the maximum and minimum values obtained over the
rated temperature range. The average full-range temperature coefficient of the reference input voltage α_VI(ref) is defined as:
α_VI(ref)
( ppm
°C
=
( ^VI(dev)
° ^{VI(ref) at 25 C}
T_A
× 10⁶
Max V_I(ref)
where:
∆T_A is the rated operating temperature range of the device.
V_I(dev)
Min V_I(ref)
˙T_A
α_VI(ref) is positive or negative, depending on whether minimum V_I(ref) or maximum V_I(ref), respectively, occurs at the lower temperature.
(3) On products compliant to MIL-PRF-38535, this parameter is not production tested.
(4)
The
output
impedance
is
defined
as:
|z_KA|
=
∆V_KA
∆I_KA
When the device is operating with two external resistors (see Figure 2), the total dynamic impedance of the circuit is given by:
( ^|z'|
=
∆V
∆I
,
which
is
approximately
equal
to
|z_KA|
1
+
R1
R2
.
Copyright © 1991–2012, Texas Instruments Incorporated
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