AD5440_15 Datasheet, PDF (1/33 Pages) Analog Devices – Dual 8-/10-/12-Bit, High Bandwidth, Multiplying DACs with Parallel Interface

Data Sheet
Dual 8-/10-/12-Bit, High Bandwidth,
Multiplying DACs with Parallel Interface
AD5428/AD5440/AD5447
FEATURES
GENERAL DESCRIPTION
10 MHz multiplying bandwidth
INL of ±0.25 LSB @ 8 bits
20-lead and 24-lead TSSOP packages
2.5 V to 5.5 V supply operation
±10 V reference input
21.3 MSPS update rate
Extended temperature range: −40°C to +125°C
4-quadrant multiplication
Power-on reset
The AD5428/AD5440/AD5447¹ are CMOS, 8-, 10-, and 12-bit,
dual-channel, current output digital-to-analog converters (DACs),
respectively. These devices operate from a 2.5 V to 5.5 V power
supply, making them suited to battery-powered and other
applications.
As a result of being manufactured on a CMOS submicron process,
they offer excellent 4-quadrant multiplication characteristics,
with large signal multiplying bandwidths of up to 10 MHz.
0.5 μA typical current consumption
Guaranteed monotonic
Readback function
AD7528 upgrade (AD5428)
AD7547 upgrade (AD5447)
The DACs use data readback, allowing the user to read the
contents of the DAC register via the DB pins. On power-up, the
internal register and latches are filled with 0s, and the DAC
outputs are at zero scale.
APPLICATIONS
Portable battery-powered applications
Waveform generators
The applied external reference input voltage (VREF) determines
the full-scale output current. An integrated feedback resistor (RFB)
provides temperature tracking and full-scale voltage output when
combined with an external I-to-V precision amplifier.
Analog processing
Instrumentation applications
Programmable amplifiers and attenuators
Digitally controlled calibration
The AD5428 is available in a small 20-lead TSSOP package, and
the AD5440/AD5447 DACs are available in small 24-lead TSSOP
packages.
Programmable filters and oscillators
Composite video
1 _{U.S. Patent Number 5,689,257.}
Ultrasound
Gain, offset, and voltage trimming
FUNCTIONAL BLOCK DIAGRAM
V_REFA
V_DD
DATA DB0
INPUTS
DB7
DB9
DB11
AD5428/AD5440/AD5447
INPUT
BUFFER
LATCH
R
8-/10-/12-BIT
R-2R DAC A
R_FBA
I_OUTA
AGND
DAC A/B
CS
R/W
DGND
CONTROL
LOGIC
LATCH
R
8-/10-/12-BIT
R-2R DAC B
R_FBB
I_OUTB
POWER-ON
RESET
V_REFB
Figure 1. AD5428/AD5440/AD5447
Rev. C
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