AD5392 Analog Devices, AD5392 Datasheet - Page 38

• Manufacturer Part Number: AD5392
• Description: 8-Channel 14-Bit Single-Supply Voltage-Output DAC
• Manufacturer: Analog Devices

Specifications of AD5392

• Resolution (bits): 14bit
• Dac Update Rate: 125kSPS
• Dac Settling Time: 8µs
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Voltage Out
• Dac Input Format: I2C/Ser 2-wire,Ser,SPI

AD5390/AD5391/AD5392
12- and 14-bit resolution. Figure 45 shows a typical transmitter
architecture, in which the AD539x DACs can be used in the
following control circuits: I
(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.
Process Control Applications
The AD539x-5 family is 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 AD539x-5 products
operate from a single 5 V supply and, therefore, require external
signal conditioning to achieve the output ranges described here.
Figure 46 shows configurations to achieve these output ranges.
The key advantages of using AD539x-5 products 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 AD539x-5 family
contains an offset and gain register for each channel, so users
can perform system-level calibration on a per-channel basis.
SOURCE
AUDIO
Figure 45. Multistage Power Amplifier Control
ALC
EXCITER
PPC
BIAS
control, average power control
PHASE
SHIFT
AMPLIFIER
APC
POWER
I
BIAS
TGC
LOAD
50Ω
Rev. C | Page 38 of 40
0V TO 10V
Optical Transceivers
The AD539x-3 family of products 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
AD539x-3 products 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 AD539x-3 parts also feature I
faces, making them ideal components for use in these applications.
Figure 47 shows a typical configuration in an optical transceiver
application.
RANGE
RANGE
10G LDD
PIN/APD
AND TIA
LASER
±10V
AND
1/4 OP4177
1/4 OP4177
1/4 OP747/
1/4 OP747/
Figure 46. Output Configurations for Process Control Applications
IRXP
IMODMON
IMPD
IBIASMON
4R
R
Figure 47. Optical Transceiver using the AD539x-3
BUS
I
3V
2
TIAs
C
4R
R
R
R
MUX
AIN
AV
DD
VOUT 3
VOUT 4
AD7994
CONTROLLER
SDA
AD539x-5
12-BIT
REFERENCE
ADC
REFIN
2.5V
SCL
VOUT 0
VOUT 1
VOUT 2
2
C-compatible and SPI inter-
0.1µF
SDA
SCL
REFOUT/REFIN
AD539x-3
DV
DD
AV
1/4 OP4177
1/4 OP747/
R
R
DD
VLSRBIAS
VLSRPWRMON
VXLOPMON
I
IMOD
BIAS
2R
2R
1/4 OP4177
1/4 OP747/
0V TO 5V
I SINK
R1
RANGE
RANGE
±5V