ad8260 Analog Devices, Inc., ad8260 Datasheet - Page 14

• Manufacturer Part Number: ad8260
• Description: High Current Driver Amplifier And Digital Vga/preamplifier With 3 Db Steps
• Manufacturer: Analog Devices, Inc.

AD8260
Figure 40. Third-Order Intermodulation Distortion (IMD3) vs. Frequency for
–100
–120
Figure 39. Harmonic Distortion (HD2, HD3) vs. Frequency for the
–100
–120
–20
–40
–60
–80
–20
–40
–60
–80
60
50
40
30
20
10
0
0
1M
0
1M
1M
Figure 41. OIP3 vs. Frequency for the VGA/Preamplifier
GAIN CODE = 1011
V
OUT
GAIN CODE = 1011
TONES 1MHz APART
V
TONES 1MHz APART
EACH TONE 0.5V p-p
GAIN CODE = 1011
HD2
HD3
OUT
= 1V p-p
LOWER
UPPER
LOWER
UPPER
VGA/Preamplifier—See Figure 62
= 1V p-p
the VGA/Preamplifier
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
10M
10M
10M
100M
100M
100M
Rev. 0 | Page 14 of 32
Figure 42. Input 1 dB Compression (IP1dB) vs. Gain Select Code at 1 MHz and
Figure 43. Small-Signal Pulse Response for the VGA/Preamplifier
Figure 44. Large-Signal Pulse Response for the VGA/Preamplifier
–10
–15
–20
–25
–30
M
M
1
3
10
–5
5
0
CH1
MATH
CH3 20.0mVΩ
MATH
2mV/DIV
0V
50mV/DIV
0V
20mV/DIV
0V
500mV/DIV
0V
0001
IP1dB LIMITED AT LOW GAIN BY THE
DYNAMIC RANGE OF THE PREAMPLIFIER
2.00VΩ
0010
5.00mV
50.0mV
10 MHz for the VGA/Preamplifier
0011
T
T
0100
10.0ns
10.0ns
GAIN SELECT CODE
0101
OUTPUT
OUTPUT
INPUT
INPUT
1MHz
10MHz
0110
M10.0ns
M10.0ns
T
T
0111
27.2000ns
27.2000ns
1000
A
A
1001
CH4
CH4
1010
180µV
200µV
1011