Rf Gain Control; If Gain Control; Automated Chip Reset; Manual Chip Reset - Analog Devices ADMV4530IQ-EVALZ User Manual

ADMV4530IQ-EVALZ/ADMV4530IF-EVALZ

RF GAIN CONTROL

To adjust the RF gain control on either the ADMV4530IQ-
EVALZ or the ADMV4530IF-EVALZ evaluation board, take
the following steps:
1. Connect a power supply to the RF_GAIN_TP test point
and one ground test point on the ADMV4530IQ-EVALZ
or ADMV4530IF-EVALZ evaluation board. Alternatively,
the power supply can be connected to the RF_GAIN SMA
port. The power supply current limit must be set to 1 mA.
2. Adjust the power supply voltage as desired from 0 V to
1.8 V. The maximum gain corresponds to 1.8 V, and the
minimum gain corresponds to 0 V. Refer to the
ADMV4530 data sheet for more information regarding
gain performance.

IF GAIN CONTROL

To adjust the IF gain control on ADMV4530IF-EVALZ
evaluation board, take the following steps:
1. Connect a power supply to the IF_GAIN_TP test point
and one ground test point on the ADMV4530IF-EVALZ
evaluation board. Alternatively, the power supply can be
connected to the IF_GAIN SMA port. The power supply
current limit must be set to 1 mA.
2. Adjust the power supply voltage as desired from 0 V to
3.3 V. The maximum gain corresponds to 0 V, and the
minimum gain corresponds to 3.3 V. Refer to the
ADMV4530 data sheet for more information regarding
gain performance.

AUTOMATED CHIP RESET

If a reset of the ADMV4530
ADMV4530IQ-EVALZ or ADMV4530IF-EVALZ evaluation
board, it is recommended to use the automated reset sequence.
Click Reset Chip (see Figure 9, Label K3 and Table 1 for
additional information). This automated sequence performs
the following actions:

Toggles all SDP-S general-purpose input/outputs (GPIOs)
to a low state, which sets both the RST and PD pins of the
ADMV4530 low.

Toggles the RST pin high to bring the
back to the normal operating state.

Programs Register 0x00 to 0x81, which also resets the
ADMV4530. This step covers legacy boards that did not
have the RST pin connected.

Programs Register 0x00 to 0x18 to enable the SDO pin on
the ADMV4530.

Programs the recommended mixer settings for IF mode.
chip is required on the
ADMV4530 chip
Evaluation Board User Guide

Programs the PLL for a 28 GHz LO frequency anticipating
a 200 MHz reference input frequency.

Reads back the register settings of the ADMV4530.

MANUAL CHIP RESET

For manual reset operations, the following outlines various
ways to perform a reset.

There is a reset button (S1) on the ADMV4530IQ-EVALZ
or the ADMV4530IF-EVALZ evaluation board. Pressing
this button pulls the RST pin low to initiate a reset to the
factory power-up state.

The RST pin can also be pulled low from within the
software by using the dropdown menu in the lower left
corner of Figure 9 (see Label G). When using this option,
be sure to return the dropdown menu back to Normal
Operation after resetting the device.

Register 0x00 can be programmed to 0x81 to initiate a
reset of the ADMV4530.
Regardless of the manual reset option used, it is recommended
to perform the following after the device resets:

Program Register 0x00 to 0x18 to enable the SDO pin on
the ADMV4530.

Read back all registers on the ADMV4530.

LOSS OF BOARD COMMUNICATION

When the ADMV4530
cable is unplugged and plugged back in while the
is open, communication with the
regain communication, click the System tab, click the USB
symbol in the SDP-S Controller subsystem, and then click
Acquire. If this step does not work, restart the
reinitiate communication with the ADMV4530IQ-EVALZ or the
ADMV4530IF-EVALZ evaluation board.

REGULATOR BYPASS

Both the ADMV4530IQ-EVALZ and the ADMV4530IF-
EVALZ evaluation boards have voltage regulators that allow
the user to operate these evaluation boards from a single 5 V dc
power supply. The on-board voltage regulators supply several
bias voltages to the various supply pins on the chip. If desired,
these voltage regulators can be bypassed by removing the 0 Ω
registers (R25 to R28) from the ADMV4530IQ-EVALZ or the
ADMV4530IF-EVALZ evaluation board and then by injecting
each voltage independently by using the corresponding test points.
See the schematics for details (see Figure 13 and Figure 19).
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is turned off and then on, or if the USB
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ADMV4530 may be lost. To
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software
software to