Datasheet

ADA4857-1/ADA4857-2 Data Sheet
Rev. C | Page 10 of 20
1 10 100
1000
07040-014
FREQUENCY (MHz)
CLOSED-LOOP GAIN (dB)
R
L
= 100Ω
G = +2
V
S
= ±5V
V
OUT
= 0.2V p-p
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
4
5
6
7
8
9
R
L
= 1kΩ
Figure 14. Small Signal Frequency Response for Various Resistive Loads (LFCSP)
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
1 10 100 1000
07040-015
FREQUENCY (MHz)
NORMALIZED CLOSED-LOOP GAIN (dB)
V
S
= 5V
R
L
= 1kΩ
V
OUT
= 0.2V p-p
G = +1
G = +2
G = +10
G = +5
Figure 15. Small Signal Frequency Response for Various Gains (LFCSP)
–120
–110
–100
–90
–80
–70
–60
–50
–40
0.2 1 10 100
G = +1, HD2
G = +1, HD3
G = +2, HD2
G = +2, HD3
07040-016
FREQUENCY (MHz)
DISTORTION (dBc)
V
S
= ±5V
V
OUT
= 2V p-p
R
L
= 1k
Figure 16. Harmonic Distortion vs. Frequency and Gain (LFCSP)
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
1
10
100
1000
07040-017
FREQUENCY (MHz)
CLOSED-LOOP GAIN (dB)
G = +1
V
S
= ±5V
V
OUT
= 2V p-p
R
L
= 100Ω
R
L
= 1kΩ
Figure 17. Large Signal Frequency Response for Various Resistive Loads (LFCSP)
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
1
2
3
1 10 100 1000
07040-018
FREQUENCY (MHz)
NORMALIZED CLOSED-LOOP GAIN (dB)
V
S
= ±5V
R
L
= 1kΩ
V
OUT
= 0.2V p-p
G = +1
G = +10
G = +5
G = +2
100Ω
V
IN
R
L
R
T
R
S
V
OUT
+V
S
–V
S
G = +1
Figure 18. Small Signal Frequency Response for Various Gains (SOIC),
R
S
= 100 Ω for G = +1
–120
–110
–100
–90
–80
–70
–60
–50
–40
0.2 1 10 100
R
L
= 100
, HD2
R
L
= 100, HD3
R
L
= 1k, HD3
07040-019
FREQUENCY (MHz)
DISTORTION (dBc)
G = +1
V
S
= ±5V
V
OUT
= 2V p-p
R
L
= 1k
, HD2
Figure 19. Harmonic Distortion vs. Frequency and Load (LFCSP)