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AD5451 Datasheet PDF : 28 Pages
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Data Sheet
8-/10-/12-/14-Bit High Bandwidth
Multiplying DACs with Serial Interface
AD5450/AD5451/AD5452/AD5453
FEATURES
12 MHz multiplying bandwidth
Integral nonlinearity (INL) of ±0.25 LSB at 8-bit
8-lead TSOT and MSOP packages
2.5 V to 5.5 V supply operation
Pin-compatible 8-/10-/12-/14-bit current output DACs
±10 V reference input
50 MHz serial interface
2.7 MSPS update rate
Extended temperature range: –40°C to +125°C
4-quadrant multiplication
Power-on reset with brownout detect
<0.4 µA typical current consumption
Guaranteed monotonic
Qualified for automotive applications
APPLICATIONS
Portable battery-powered applications
Waveform generators
Analog processing
Instrumentation applications
Programmable amplifiers and attenuators
Digitally controlled calibration
Programmable filters and oscillators
Composite video
Ultrasound
Gain, offset, and voltage trimming
Qualified for automotive applications
GENERAL DESCRIPTION
The AD5450/AD5451/AD5452/AD54531 are CMOS 8-/10-/12-/
14-bit current output digital-to-analog converters (DACs), respect-
tively. These devices operate from a 2.5 V to 5.5 V power supply,
making them suited to several applications including battery-
powered applications.
As a result of manufacture on a CMOS submicron process, these
DACs offer excellent 4-quadrant multiplication characteristics
of up to 12 MHz.
These DACs use a double-buffered, 3-wire serial interface that
is compatible with SPI, QSPI™, MICROWIRE™, and most digital
signal processor (DSP) interface standards. Upon power-up, the
internal shift register and latches are filled with 0s, and the DAC
output is at zero scale.
1 U.S. Patent Number 5,689,257.
FUNCTIONAL BLOCK DIAGRAM
VDD
VREF
AD5450/
AD5451/
AD5452/
AD5453
R
8-/10-/12-/14-BIT REF
R-2R DAC
RFB
IOUT1
POWER-ON
RESET
DAC REGISTER
INPUT LATCH
SYNC
SCLK
SDIN
CONTROL LOGIC
AND INPUT SHIFT
REGISTER
GND
Figure 1.
The applied external reference input voltage (VREF) determines
the full-scale output current. These devices can handle ±10 V
inputs on the reference, despite operating from a single-supply
power supply of 2.5 V to 5.5 V. An integrated feedback resistor
(RFB) provides temperature tracking and full-scale voltage
output when combined with an external current to voltage
precision amplifier.
The AD5450/AD5451/AD5452/AD5453 DACs are available in
small 8-lead TSOT, and the AD5452/AD5453 are also available
in MSOP packages. The AD5453 also comes in 8-lead LFCSP.
Rev. H
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