AD8331ARQ-REEL Analog Devices Inc, AD8331ARQ-REEL Datasheet - Page 29

• Manufacturer Part Number: AD8331ARQ-REEL
• Description: IC VGA SINGLE W/PREAMP 20-SSOP
• Manufacturer: Analog Devices Inc
• Series: X-AMP®r
• Type: Variable Gain Amplifierr

Specifications of AD8331ARQ-REEL

• Rohs Status: RoHS non-compliant
• Design Resources: Interfacing the High Frequency AD8331 to AD9215 (CN0096)
• Applications: Signal Processing
• Mounting Type: Surface Mount
• Package / Case: 20-QSOP
• For Use With: AD8331-EVALZ - BOARD EVAL FOR AD8331

Output Clamping
Outputs are internally limited to a level of 4.5 V p-p differential
when operating at a 2.5 V common-mode voltage. The postamp
implements an optional output clamp engaged through a resistor
from R
resistor values.
Output clamping can be used for ADC input overload protection, if
needed, or postamp overload protection when operating from a
lower common-mode level, such as 1.5 V. The user should be
aware that distortion products increase as output levels approach
the clamping levels, and the user should adjust the clamp resistor
accordingly. For additional information, see the Applications
Information section.
The accuracy of the clamping levels is approximately ±5% in LO
or HI mode. Figure 80 illustrates the output characteristics for a
few values of R
CLMP
to ground. Table 8 shows a list of recommended
CLMP
.
Rev. G | Page 29 of 56
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
–3
R
8.8kΩ
3.5kΩ
3.5kΩ
8.8kΩ
Figure 80. Output Clamping Characteristics
CLMP
R
R
–2
= 1.86kΩ
CLMP
CLMP
=
=
∞
∞
AD8331/AD8332/AD8334
–1
V
INH
0
(V)
1
2
3