LT1460 LINER [Linear Technology], LT1460 Datasheet - Page 16

• Manufacturer Part Number: LT1460
• Description: Micropower Precision Series Reference Family
• Manufacturer: LINER [Linear Technology]

APPLICATIO S I FOR ATIO
LT1460
R
large because it will limit the load regulation.
Figure 6 to Figure 8 illustrate response in the LT1460-5.
The 1V step from 5V to 4V produces a current step of
1mA or 100µA for R
the response of the reference with no load capacitance.
The reference settles to 5mV (0.1%) in less than 2µs for
a 100µA pulse and to 0.1% in 3µs with a 1mA step. When
load capacitance is greater than 0.01µF, the reference begins
to ring due to the pole formed with the output impedance.
Figure 8 shows the response of the reference to a 1mA
16
S
V
= 2Ω and C
IN
= 5V
0.1µF
V
V
V
V
V
V
C
GEN
OUT
OUT
GEN
OUT
OUT
IN
Figure 6. Response Time Test Circuit
L
= 1µF. R
Figure 8. C
U
LT1460-5
L
Figure 7. C
= 1k or R
S
10µs/DIV
U
2µs/DIV
should not be made arbitrarily
L
V
= 0.01µF
OUT
L
L
= 0
= 10k. Figure 7 shows
W
C
L
R
L
1460 F07
1460 F08
V
GEN
U
5V
4V
R
R
5V
4V
R
R
L
L
L
L
= 10k
= 1k
= 10k
= 1k
1460 F06
5V
4V
and 100µA load current step with a 0.01µF load capacitor.
Figure 9 to Figure 11 illustrate response of the LT1460-10.
The 1V step from 10V to 9V produces a current step of
1mA or 100µA for R
the response of the reference with no load capacitance.
The reference settles to 10mV (0.1%) in 0.4µs for a 100µA
pulse and to 0.1% in 0.8µs with a 1mA step. When load
capacitance is greater than 0.01µF, the reference begins
to ring due to the pole formed with the output impedance.
Figure 11 shows the response of the reference to a 1mA and
100µA load current step with a 0.01µF load capacitor.
V
IN
= 12.5V
0.1µF
V
V
V
V
V
V
GEN
OUT
OUT
GEN
OUT
OUT
C
IN
Figure 9. Response Time Test Circuit
Figure 11. C
LT1460-10
L
Figure 10. C
= 1k or R
10µs/DIV
2µs/DIV
L
V
= 0.01µF
L
OUT
L
= 0
= 10k. Figure 10 shows
C
L
R
L
1460 F10
1460 F11
V
GEN
10V
9V
R
R
10V
9V
R
R
L
L
L
L
= 10k
= 1k
= 10k
= 1k
1460 F09
10V
9V
1460f