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PDF AD5932 Data sheet ( Hoja de datos )
| Número de pieza | AD5932 | |
| Descripción | Programmable Frequency Scan Waveform Generator | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Programmable Frequency Scan
Waveform Generator
AD5932
FEATURES
Programmable frequency profile
No external components necessary
Output frequency up to 25 MHz
Burst-and-listen capability
Preprogrammable frequency profile minimizes number of
DSP/microcontroller writes
Sinusoidal/triangular/square wave outputs
Automatic or single pin control of frequency stepping
Power-down mode: 20 μA
Power supply: 2.3 V to 5.5 V
Automotive temperature range: −40°C to +125°C
16-lead, Pb-free TSSOP
APPLICATIONS
Frequency scanning/radar
Network/impedance measurements
Incremental frequency stimulus
Sensory applications
Proximity and motion
GENERAL DESCRIPTION
The AD59321 is a waveform generator offering a programmable
frequency scan. Utilizing embedded digital processing that
allows enhanced frequency control, the device generates
synthesized analog or digital frequency-stepped waveforms.
Because frequency profiles are preprogrammed, continuous
write cycles are eliminated, thereby freeing up valuable
DSP/microcontroller resources. Waveforms start from a known
phase and are incremented phase-continuously, which allows
phase shifts to be easily determined. Consuming only 6.7 mA,
the AD5932 provides a convenient low power solution to
waveform generation.
The AD5932 outputs each frequency in the range of interest for
a defined length of time and then steps to the next frequency in
the scan range. The length of time the device outputs a particular
frequency is preprogrammed, and the device increments the
frequency automatically; or, alternatively, the frequency is
incremented externally via the CTRL pin. At the end of the
range, the AD5932 continues to output the last frequency until
the device is reset. The AD5932 also offers a digital output via
the MSBOUT pin.
DVDD CAP/2.5V
FUNCTIONAL BLOCK DIAGRAM
DGND
INTERRUPT
STANDBY
AGND AVDD
(continued on Page 3)
MCLK
CTRL
REGULATOR
VCC
2.5V
SYNC
INCREMENT
CONTROLLER
DATA
INCR
FREQUENCY
CONTROLLER
/
24
DATA AND CONTROL
AD5932
24-BIT
PIPELINED
DDS CORE
BUFFER
BUFFER
10-BIT
DAC
SYNCOUT
MSBOUT
VOUT
SERIAL INTERFACE
CONTROL
REGISTER
ON-BOARD
REFERENCE
FULL-SCALE
CONTROL
COMP
FSYNC
SCLK
SDATA
Figure 1.
1 Protected by U.S. patent number 6747583; other patents pending.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or 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
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
1 page  
AD5932
Parameter
Low Power Sleep Mode
Y Grade1
Min
Typ
Max Unit
Test Conditions/Comments
Device is reset before putting into standby
20
85 μA
All outputs powered down, MCLK = 0 V,
serial interface active
140 240 μA
All outputs powered down, MCLK active,
serial interface active
1 Operating temperature range is as follows: Y version: −40°C to +125°C; typical specifications are at +25°C.
2 Guaranteed by design, not production tested.
SPECIFICATIONS TEST CIRCUIT
100nF
10nF
CAP/2.5V
REGULATOR
AVDD
10nF
COMP
12
AD5932
SIN
ROM
10-BIT
DAC
VOUT
Figure 2. Test Circuit Used to Test the Specifications
20pF
Rev. 0 | Page 5 of 28
5 Page 
70
TA = 25°C
AVDD = DVDD = 5V
65 fOUT = FMCLK/4096
60
55
50
45
40
0 10M 20M 30M 40M
MCLK FREQUENCY (MHz)
Figure 14. SNR vs. MCLK Frequency
50M
1.25
AVDD = DVDD = 5V
1.23
1.21
1.19
1.17
1.15
–40
–20 0
20 40 60 80
TEMPERATURE (°C)
Figure 15. VREF vs. Temperature
100 120
2.0
1.9 AVDD = DVDD = 2.3V
1.8
1.7 AVDD = DVDD = 5V
1.6
1.5
1.4
1.3
1.2
–40
–20 0
20 40 60 80 100
TEMPERATURE (°C)
Figure 16. Wake-up Time vs. Temperature
120
AD5932
90
80
70
60
50
40
30
20
10
0
V p-p (mV)
Figure 17. Histogram of VOUT Peak-to-Peak
80
70
60
50
40
30
20
10
0
VOFFSET (mV)
Figure 18. Histogram of VOUT Offset
0
TA = 25°C
–10 100mV p-p RIPPLE
NO DECOUPLING ON SUPPLIES
AVDD = DVDD = 5V
–20
–30
DVDD (on CAP/2.5V)
–40
–50
–60
–70 AVDD (on VOUT)
–80
10
100 1k 10k 100k
MODULATING FREQUENCY (Hz)
Figure 19. PSSR
1M
Rev. 0 | Page 11 of 28
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet AD5932.PDF ] | |
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