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AD5450 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer AD5450
Beschreibung 8-/10-/12-/14-Bit High Bandwidth Multiplying DACs
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 28 Seiten
AD5450 Datasheet, Funktion
Data Sheet
8-/10-/12-/14-Bit High Bandwidth
Multiplying DACs with Serial Interface
AD5450/AD5451/AD5452/AD5453
FEATURES
12 MHz multiplying bandwidth
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
GENERAL DESCRIPTION
The AD5450/AD5451/AD5452/AD54531 are CMOS 8-/10-/12-/
14-bit current output digital-to-analog converters, respectively.
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 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 parts 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.
The EV-AD5443/46/53SDZ evaluation board is available for
evaluating DAC performance. For more information, see the UG-
327 evaluation board user guide.
Rev. G
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2005–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com






AD5450 Datasheet, Funktion
AD5450/AD5451/AD5452/AD5453
ABSOLUTE MAXIMUM RATINGS
Transient currents of up to 100 mA do not cause SCR latch-up.
TA = 25°C, unless otherwise noted.
Table 3.
Parameter
VDD to GND
VREF, RFB to GND
IOUT1 to GND
Input Current to Any Pin Except Supplies
Logic Inputs and Output1
Operating Temperature Range, Extended
(Y Version)
Storage Temperature Range
Junction Temperature
θJA Thermal Impedance
8-Lead MSOP
8-Lead TSOT
Lead Temperature, Soldering (10 sec)
IR Reflow, Peak Temperature (<20 sec)
Rating
−0.3 V to +7 V
−12 V to +12 V
−0.3 V to +7 V
±10 mA
−0.3 V to VDD + 0.3 V
−40°C to +125°C
−65°C to +150°C
150°C
206°C/W
211°C/W
300°C
235°C
1 Overvoltages at SCLK, SYNC, and SDIN are clamped by internal diodes.
Data Sheet
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
Rev. G | Page 6 of 28

6 Page









AD5450 pdf, datenblatt
AD5450/AD5451/AD5452/AD5453
3
TA = 25°C
VDD = 5V
0
–3
–6
–9
10k
VREF = ±2V, AD8038 CCOMP = 1pF
VREF = ±2V, AD8038 CCOMP = 1.5pF
VREF = ±15V, AD8038 CCOMP = 1pF
VREF = ±15V, AD8038 CCOMP = 1.5pF
VREF = ±15V, AD8038 CCOMP = 1.8pF
100k
1M
FREQUENCY (Hz)
10M
100M
Figure 30. Reference Multiplying Bandwidth vs. Frequency and
Compensation Capacitor
0.08
0.06
0.04
0.02
VDD = 5V
0x7FF TO 0x800
NRG = 2.154nVs
TA = 25°C
VDD = 0V
AD8038 AMPLIFIER
CCOMP = 1.8pF
VDD = 3V
0x7FF TO 0x800
NRG = 1.794nVs
0
–0.02
–0.04
–0.06
50
VDD = 5V
0x800 TO 0x7FF
NRG = 0.694nVs
VDD = 5V
0x800 TO 0x7FF
NRG = 0.694nVs
75 100 125 150 175 200 225
TIME (ns)
Figure 31. Midscale Transition, VREF = 0 V
250
–1.66
–1.68
–1.70
–1.72
VDD = 5V
0x7FF TO 0x800
NRG = 2.154nVs
TA = 25°C
VDD = 3.5V
AD8038 AMPLIFIER
CCOMP = 1.8pF
VDD = 3V
0x7FF TO 0x800
NRG = 1.794nVs
–1.74
–1.76
–1.78
–1.80
50
VDD = 5V
0x800 TO 0x7FF
NRG = 0.694nVs
VDD = 5V
0x800 TO 0x7FF
NRG = 0.694nVs
75 100 125 150 175 200 225 250
TIME (ns)
Figure 32. Midscale Transition, VREF = 3.5 V
Data Sheet
10
TA = 25°C
0 VDD = 3V
AD8038 AMPLIFIER
–10
–20
–30
–40
–50 FULL SCALE
–60
ZERO SCALE
–70
–80
–90
–100
1
10 100 1k 10k 100k 1M
FREQUENCY (Hz)
10M
Figure 33. Power Supply Rejection Ratio vs. Frequency
–60
TA = 25°C
VDD = 5V
–65 VREF = ±3.5V
–70
–75
–80
–85
–90
100
1k 10k
FREQUENCY (Hz)
Figure 34. THD + Noise vs. Frequency
100k
100
MCLK = 500kHz
80
MCLK = 1MHz
60
MCLK = 200kHz
40
20
TA = 25°C
VREF = ±3.5V
AD8038 AMPLIFIER
0
0 10
20 30
fOUT (kHz)
40
Figure 35. Wideband SFDR vs. fOUT Frequency
50
Rev. G | Page 12 of 28

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