Datasheet

AD8170/AD8174
–7–
REV. 0
*WORST CHANNEL
FREQUENCY – MHz
–30
–40
–120
–80
–90
–100
–110
–60
–70
–50
0.5 1001
HARMONIC DISTORTION – dB
10
V
OUT
= 2V p-p
G = +2
R
F
= 499Ω (AD8170R)
R
F
= 549Ω (AD8174R)
R
L
= 100Ω
2ND HARMONIC
3RD HARMONIC
Figure 16. Harmonic Distortion vs. Frequency
FREQUENCY – MHz
1M
316k
10
0.1 5001 10 100
10k
316
100
31.6
100k
31.6k
1k
3.16k
IMPEDANCE – Ω
V
IN
= +0.221V rms
G = +2
R
F
= 499Ω (AD8170R)
R
F
= 549Ω (AD8174R)
0.03
ENABLE, SD = LOGIC 1; G = +2
ENABLED OUTPUT IMPEDANCE (G = +2)
ENABLE, SD = LOGIC 0, R
S(OUT)
= 50Ω
DISABLED (OR SHUTDOWN)
OUTPUT IMPEDANCE (G= +2)
ENABLE,
SD = LOGIC 1;
G = +1
DISABLED
(OR SHUTDOWN)
OUTPUT IMPEDANCE
(G = +1)
ENABLED
(OR DISABLED)
INPUT
IMPEDANCE
Figure 17. Input & Output Impedance vs. Frequency
FREQUENCY – MHz
0
–10
0.1
5001 10 100
–40
–70
–80
–20
–30
–60
–50
PSRR – dB
V
IN
= 200mV rms
G = +2
R
F
= 499Ω (AD8170R)
R
F
= 549Ω (AD8174R)
R
L
= 100Ω
0.03
–PSRR
+PSRR
Figure 18. Power Supply Rejection vs. Frequency
FREQUENCY – Hz
0
–0.4
1G1M 10M 100M
–3
–0.1
–0.2
–0.3
–1
–2
0
+0.1
NORMALIZED FLATNESS – dB
V
OUT
= 2V p-p
G = +2
R
F
= 1kΩ
R
S(OUT)
= 20Ω
C
L
= 0
–9
–6
–7
–8
–5
–4
C
L
= 20pF
C
L
=
50pF
C
L
= 300pF
C
L
=
100pF
C
L
=
100pF
C
L
= 300pF
C
L
= 50pF
NORMALIZED OUTPUT – dB
Figure 19. Frequency Response vs. Capacitive Load, G = +2
NORMALIZED OUTPUT – dB
V
IN
= 50mV rms
G = +2
R
F
= 499Ω (AD8170R)
R
F
= 549Ω (AD8174R)
R
L
= 100Ω
FREQUENCY – Hz
–0.5
NORMALIZED FLATNESS – dB
–0.1
–0.2
–0.3
–0.4
0.1
0
0
–9
–5
–6
–7
–8
–3
–4
–1
–2
1M 10M 100M 1G
Figure 20. Small Signal Frequency Response
PHASE – Degrees
FREQUENCY – Hz
10
TRANSIMPEDANCE – Ω
10k
1k
100
1M
100k
180
–45
135
90
45
0
PHASE
TRANSIMPEDANCE
1k 10k 10M 1G100k 1M 100M
Figure 21. Open-Loop Transresistance and Phase
vs. Frequency