AD5392BSTZ-3(RevF) View Datasheet(PDF) - Analog Devices
Part Name
Description
Manufacturer
AD5392BSTZ-3
(Rev.:RevF)
(Rev.:RevF)
Analog Devices
AD5392BSTZ-3 Datasheet PDF : 44 Pages
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Data Sheet
Power Amplifier Control
Multistage power amplifier designs require a large number of
setpoints in the operation and control of the output stage. The
AD5390/AD5391/AD5392 are ideal for these applications
because of their small size (LFCSP) and the integration of 8 and
16 channels, offering 12- and 14-bit resolution. Figure 49 shows
a typical transmitter architecture, in which the AD5390/
AD5391/AD5392 DACs can be used in the following control
circuits: IBIAS control, average power control (APC), peak power
control (PPC), transmit gain control (TGC), and audio level
control (ALC). DACs are also required for variable voltage
attenuators, phase shifter control, and dc-setpoint control in the
overall amplifier design.
PHASE
SHIFT
IBIAS
AUDIO
SOURCE
EXCITER
POWER
AMPLIFIER
50Ω
LOAD
ALC
PPC
APC
TGC
Figure 49. Multistage Power Amplifier Control
Process Control Applications
The AD5390-5/AD5391-5/AD5392-5 are ideal for process
control applications because it offers a combination of 8 and 16
channels and 12-bit and 14-bit resolution. These applications
generally require output voltage ranges of 0 V to 5 V ± 5 V, 0 V
to 10 V ± 10 V, and current sink and source functions. The
AD5390-5/AD5391-5/AD5392-5 operate from a single 5 V
supply and, therefore, require external signal conditioning to
achieve the output ranges described here. Figure 50 shows
configurations to achieve these output ranges. The key
advantages of using AD5390-5/AD5391-5/AD5392-5 in these
applications are small package size, pin compatibility with the
ability to upgrade from 12 to 14 bits, integrated on-chip 2.5 V
reference with 10 ppm/°C maximum temperature coefficient,
and excellent accuracy specifications. The AD5390-5/AD5391-5/
AD5392-5 contain an offset and gain register for each channel,
so users can perform system-level calibration on a per-channel
basis.
AD5390/AD5391/AD5392
4R
±10V
R
RANGE
1/4 OP747/
1/4 OP4177
R
4R
0V TO 10V
RANGE
R
1/4 OP747/
R
1/4 OP4177
0.1µF
2.5V
REFERENCE
VOUT 3
VOUT 0
AD539x-5
VOUT 4
VOUT 1
VOUT 2
2R
R
±5V
RANGE
R
1/4 OP747/
2R 1/4 OP4177
0V TO 5V
RANGE
1/4 OP747/
1/4 OP4177
I SINK
R1
Figure 50. Output Configurations for Process Control Applications
Optical Transceivers
The AD5390-3/AD5391-3/AD5392-3 are ideally suited to optical
transceiver applications. In 300-pin MSA applications, for
example, digital-to-analog converters are required to control the
laser power, APD bias, and modulator amplitude. Diagnostic
information is required as analog outputs from the module. The
AD5390-3/AD5391-3/AD5392-3 offer a combination of 8/16
channels, a resolution of 12/14 bits in a 64-lead LFCSP, and
operate from a supply voltage of 2.7 V to 5.5 V supply with
internal reference. The AD5390-3/AD5391-3/AD5392-3 also
feature I2C-compatible and SPI inter-faces, making them ideal
components for use in these applications. Figure 51 shows a
typical configuration in an optical transceiver application.
3V
I2C
BUS
PIN/APD IRXP
AND TIA
10G LDD
AND
LASER
IMODMON
IMPD
IBIASMON
TIAs
CONTROLLER
SDA SCL
AVDD
REFIN
AIN
MUX
12-BIT
ADC
AD7994
DVDD AVDD
SDA
SCL
REFOUT/REFIN
AD539x-3
VLSRBIAS
VLSRPWRMON
VXLOPMON
IBIAS
IMOD
Figure 51. Optical Transceiver using the AD5390-3/AD5391-3/AD5392-3
Rev. F | Page 41 of 44
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