ADA4941-1 Analog Devices, ADA4941-1 Datasheet - Page 9

• Manufacturer Part Number: ADA4941-1
• Description: Single Supply Differential 18-Bit ADC Driver
• Manufacturer: Analog Devices

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Figure 13. REF Input Small Signal Frequency Response for Various Supplies
Figure 12. Small Signal Frequency Response for Various Capacitive Loads
Figure 11. Small Signal Frequency Response for Various Gains
–10
–12
–13
–14
–15
–16
–10
–12
–13
–14
–15
–16
–10
–12
–13
–14
–15
–16
–11
–11
–11
–1
–2
–3
–4
–5
–6
–7
–8
–9
–1
–2
–3
–4
–5
–6
–7
–8
–9
–1
–2
–3
–4
–5
–6
–7
–8
–9
2
1
0
2
1
0
2
1
0
1
1
1
10
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
C
L
= 0pF
G = +10
10
10
G = +4
100
V
S
C
V
= +3V
L
VREF = 0.05V p-p
S
V
V
= 20pF
O, dm
= +5V
O, dm
= 0.1V p-p
= 0.1V p-p
G = –2
V
S
G = +2
= ±5V
1000
1000
100
Rev. A | Page 9 of 24
–100
–120
–130
–140
–110
Figure 15. Frequency Response for Various Output Amplitudes
–10
–11
–12
–13
–14
–15
–16
Figure 14. Large Signal Frequency Response for Various Gains
–10
–11
–12
–13
–14
–15
–16
–70
–80
–90
–1
–2
–3
–4
–5
–6
–7
–8
–9
–1
–2
–3
–4
–5
–6
–7
–8
–9
2
1
0
2
1
0
0.1
0.1
1
Figure 16. Distortion vs. Frequency for Various Loads
V
VREF = MIDSUPPLY
O, dm
HD2
V
O, dm
V
= 2V p-p
O, dm
= 2V p-p
1
1
= 6V p-p
HD2
10
G = +4
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (kHz)
G = +10
G = –2
10
10
HD3
G = +2
100
V
O, dm
100
100
V
= 0.1V p-p
O, dm
ADA4941-1
R
R
R
L
L
L
= 2V p-p
= 2kΩ
= 1kΩ
= 500Ω
1000
1000
1000