EVAL-AD8332/AD9238 Analog Devices Inc, EVAL-AD8332/AD9238 Datasheet - Page 29

• Manufacturer Part Number: EVAL-AD8332/AD9238
• Description: BOARD EVALUATION AD8332/AD9238
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD8332/AD9238

• Module/board Type: Evaluation Board
• For Use With/related Products: AD8332, AD9238
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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