OP27
Rev. F | Page 9 of 20
TOTAL SUPPLY VOLTAGE, V+ – V–, (V)
VOLTA
GE
N
OISE
(
n
V/
√Hz)
5
4
3
2
1
040
TA = 25°C
10
20
30
AT 10Hz
AT 1kHz
00317-010
Figure 10. Voltage Noise Density vs. Supply Voltage
10.0
0.1
10
10k
FREQUENCY (Hz)
CURRE
NT
NOIS
E
(pA/
√Hz)
I/F CORNER = 140Hz
1.0
100
1k
00317-011
Figure 11. Current Noise Density vs. Frequency
5.0
1.0
545
00317-012
60
–70
–75
175
TEMPERATURE (
°C)
OFFSET
VOLTA
GE
(
μV)
OP27C
TOTAL SUPPLY VOLTAGE (V)
S
U
P
L
Y
CURRE
NT
(mA)
TA = –55°C
TA = +125°C
4.0
3.0
2.0
15
25
35
TA = +25°C
Figure 12. Supply Current vs. Supply Voltage
50
40
30
20
10
0
–10
–20
–30
–40
–50
–60
OP27A
OP27C
–50
–25
0
25
50
75
100
125
150
TRIMMING WITH
10k
Ω POT DOES
NOT CHANGE
TCVOS
00317-013
Figure 13. Offset Voltage Drift of Five Representative Units vs. Temperature
6
–6
07
TIME (Months)
CHANGE
IN
OFFS
E
T
V
O
LTAGE
(
μV)
4
2
0
–2
–4
–6
6
4
2
0
–2
–4
123
45
6
00317-014
Figure 14. Long-Term Offset Voltage Drift of Six Representative Units
1
0
5
TIME AFTER POWER ON (Min)
CHANGE
IN
INP
U
T
OFFS
E
T
V
O
LTAGE
(
μV)
TA = 25°C
VS = 15V
10
5
12
34
OP27 F
OP27 A/E
OP27 C/G
00317-015
Figure 15. Warm-Up Offset Voltage Drift