ADA2200-EVALZ User Guide
UG-702
QUICK START AND SETUP PROCEDURE
The recommended configuration for initial evaluation is shown
in Figure 2. The signal inputs can handle voltages from 0 V to
3.3 V. Power is supplied through the mini-B USB plug by
connecting it to any powered USB port.
Set up the
by completing the following steps:
1.
Power the board by plugging it into a PC or powered USB
hub. The green LED (DS1) turns on when power is
available.
2.
Verify that the jumper configuration matches the settings
shown in Table 1. With this configuration, the IN+
terminal can be driven with a single-ended source.
3.
Configure a signal generator to source a 6.25 kHz signal.
Offset the output voltage to make sure the signal remains
between 0 V and 3.3 V. An offset at midsupply (1.65 V)
allows maximum signal swing.
Note that many signal generators have a 50 Ω source
impedance and are configured for 50 Ω loads. Therefore,
the voltage swing doubles when the instrument is not
loaded with a 50 Ω impedance. This condition applies to
both the amplitude and offset setting. Verify the actual
signal output with a high input impedance scope before
connecting the signal generator to the
board.
4.
Synchronize the signal generator and the board by
connecting the reference clock output signal (available
through the P9 pins) to a trigger input on the generator.
The signal generation must be configured to start on this
trigger event (burst generation) or to lock to the reference
clock signal (RCK). The detailed configuration depends on
the specific source used.
5.
Connect the signal generator to the IN+ terminal through
the P2 pins and enable the output.
6.
To observe the demodulated signal, probe at P11 and P12.
P11 and P12 are arranged for differential scope probes, but
standard probes or clips work as well. Both the output
synchronization pulse (SYNCO) and RCK can be used to
trigger an oscilloscope.
7.
Observe the filtered output by measuring the voltage
between P7 and P8 with a digital multimeter (DMM).
Table 1. Default Jumper Settings
Designator Position Description
P5
1 and 2
IN+ connected to INP
P6
2 and 3
IN− connected to VOCM
P13
2 and 3
On-board clock selected
Pin 1 can be identified by the chamfered corner and number on
the silkscreen.
12359-
002
50
Ω
50
Ω
50
Ω
P13
P5
P2
P9
P6
P11
P7
P8
USB
(POWER ONLY)
1.58k
Ω
1.58k
Ω
20µF
20µF
ADA2200
50
Ω
RCK OUTPUT
50
Ω
CLK INPUT
0V TO 3.0V
SYNC OUTPUT
OSCILLOSCOPE
00000
-00
0
CH1
5.00V
CH2 100m V
M2.00m s
A CH1
3.00V
VW
2
1
T
3.92000m s
IN+
OUT+
VOCM
IN–
OUT–
TRIG
CH1
CH2
CONFIG
EEPROM
I/Q
SEL
RESET
FUNCTION
GENERATOR
DMM
TRIG
OUT
P4
P10
P3
P12
Figure 2. Suggested Configuration for Quick Start, Showing Connections to Standard Test Equipment
Rev. 0 | Page 3 of 10
