AD5405_15 Datasheet, PDF (1/25 Pages) Analog Devices – Dual 12-Bit, High Bandwidth, Multiplying DAC with 4-Quadrant Resistors and Parallel Interface

Dual 12-Bit, High Bandwidth, Multiplying DAC with
4-Quadrant Resistors and Parallel Interface
AD5405
FEATURES
GENERAL DESCRIPTION
10 MHz multiplying bandwidth
On-chip 4-quadrant resistors allow flexible output ranges
INL of ±1 LSB
40-lead LFCSP package
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
The AD5405¹ is a CMOS, 12-bit, dual-channel, current output
digital-to-analog converter (DAC). This device operates from a
2.5 V to 5.5 V power supply, making it suited to battery-powered
and other applications.
As a result of manufacture with a CMOS submicron process, the
device offers excellent 4-quadrant multiplication characteristics,
with large signal multiplying bandwidths of up to 10 MHz.
4-quadrant multiplication
Power-on reset
0.5 μA typical current consumption
Guaranteed monotonic
Readback function
APPLICATIONS
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. This device
also contains the 4-quadrant resistors necessary for bipolar
operation and other configuration modes.
Portable battery-powered applications
Waveform generators
Analog processing
Instrumentation applications
Programmable amplifiers and attenuators
Digitally controlled calibration
This DAC uses 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.
The AD5405 has a 6 mm × 6 mm, 40-lead LFCSP package.
Programmable filters and oscillators
Composite video
1 _{U.S. Patent Number 5,689,257.}
Ultrasound
Gain, offset, and voltage trimming
FUNCTIONAL BLOCK DIAGRAM
R3A R2_3A R2A ^VREF^A R1A
V_DD
DATA
INPUTS
DB0
DB11
R3
AD5405
2R
INPUT
BUFFER
R2
2R
LATCH
R1 RFB
2R 2R
12-BIT
R-2R DAC A
R_FBA
I_OUT1A
I_OUT2A
DAC A/B
CS
R/W
LDAC
GND
CLR
CONTROL
LOGIC
LATCH
12-BIT
R-2R DAC B
POWER-ON
R1
RESET
R3
R2
2R
2R
2R
R3B R2_3B R2B V_REFB R1B
RFB
2R
Figure 1.
I_OUT1B
I_OUT2B
R_FBB
Rev. B
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