AD8538 Analog Devices, AD8538 Datasheet - Page 16

• Manufacturer Part Number: AD8538
• Description: Low Power, Precision, Auto-Zero Op Amp (5-lead TSOT-23)
• Manufacturer: Analog Devices

Specifications of AD8538

• -3db Bandwidth: 430kHz
• Slew Rate: 0.4V/µs
• Vos: 5µV
• Ib: 15pA
• # Opamps Per Pkg: 1
• Input Noise (nv/rthz): 50nV/rtHz
• Vcc-vee: 2.7V to 5.5V
• Isy Per Amplifier: 180µA
• Packages: SOIC,SOT

AD8538/AD8539
Figure 46. AD8539 Closed-Loop Output Impedance vs. Frequency
Figure 47. AD8539 Small Signal Overshoot vs. Load Capacitance
1000
0.01
900
800
700
600
500
400
300
200
100
60
50
40
30
20
10
0
100
1
AD8539
V
A
C
R
AD8539
V
R
Figure 48. AD8539 Small Signal Transient Response
AD8539
V
SY
V
L
L
SY
L
SY
= 1
= 300pF
= 2kΩ
= 2kΩ
= 5V
= ±2.5V
= ±2.5V
A
V
1k
= 100
10
CAPACITANCE (pF)
FREQUENCY (Hz)
TIME (2µs/DIV)
A
10k
V
= 10
100k
A
V
100
= 1
1M
OS+
OS–
10M
1k
Rev. A | Page 16 of 24
–0.05
–0.10
–0.15
–0.20
–0.25
–0.30
–0.35
–0.05
–0.10
–0.15
–0.20
–0.25
0.05
0.15
0.10
0.05
0
0
AD8539
V
A
C
R
Figure 49. AD8539 Large Signal Transient Response
SY
V
L
L
Figure 51. AD8539 Negative Overload Recovery
= 1
= 300pF
= 10kΩ
Figure 50. AD8539 Positive Overload Recovery
= 5V
INPUT VOLTAGE
INPUT VOLTAGE
TIME (20µs/DIV)
TIME (20µs/DIV)
TIME (4µs/DIV)
OUTPUT VOLTAGE
OUTPUT VOLTAGE
AD8539
V
A
SY
V
AD8539
V
A
= –50
= ±2.5V
SY
V
= –50
= ±2.5V
7.5
6.5
5.5
4.5
3.5
2.5
1.5
0.5
–0.5
5
4
3
2
1
0
–1
–2
–3