Texas Instruments VCA2617EVM Evaluation Module VCA2617EVM VCA2617EVM Fiche De Données
Codes de produits
VCA2617EVM
www.ti.com
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Clamping Voltage
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Switch Settings
ON
OFF
1
3
OPEN
SW1
HG A
HG B
PD
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Physical Description
8.1
PCB Layout
Clamping Voltage
The VCA2617 allows for a user to limit the output voltage swing to a defined level. For this configuration,
the desired clamping voltage level is applied to the V
the desired clamping voltage level is applied to the V
CLMP
A and V
CLMP
B pins of the VCA2617. The EVM
includes a 3.3V reference (U3) that supplies a stable voltage. Using potentiometer RP1, the clamping
voltage can be adjusted to the desired value.
voltage can be adjusted to the desired value.
Use switch SW1 to control the post-gain and power-down functions of the VCA2617. (See
and
.)
Figure 1. Switch SW1 Settings
Table 1. Switch SW1 Summary
HG A / HG B
PD
ON = H (5V)
Low-Gain Mode (–16dB to +32dB range)
Normal operation
OFF = L (0V)
High-Gain Mode (–10dB to +38dB range)
Power-down mode
This section describes the physical characteristics and PCB layout of the evaluation module, and lists the
components used in the VCA2617EVM.
components used in the VCA2617EVM.
The EVM is constructed on a four-layer, 4.5in x 3.5in PCB using FR-4 material.
shows the
schematic of the VCA2617EVM.
through
give a brief description of the individual layers.
SBOU033 – November 2005
VCA2617EVM User's Guide
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