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ADF7012 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADF7012
Beschreibung Multichannel ISM Band FSK/GFSK/OOK/GOOK/ASK Transmitter
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 29 Seiten
ADF7012 Datasheet, Funktion
Multichannel ISM Band
FSK/GFSK/OOK/GOOK/ASK Transmitter
ADF7012
FEATURES
GENERAL DESCRIPTION
Single-chip, low power UHF transmitter
The ADF7012 is a low power FSK/GFSK/OOK/GOOK/ASK
75 MHz to 1 GHz frequency operation
UHF transmitter designed for short-range devices (SRDs). The
Multichannel operation using fractional-N PLL
output power, output channels, deviation frequency, and mod-
2.3 V to 3.6 V operation
ulation type are programmable by using four, 32-bit registers.
On-board regulator
Programmable output power
−16 dBm to +14 dBm, 0.4 dB steps
Data rates: dc to 179.2 kbps
Low current consumption
868 MHz, 10 dBm, 21 mA
433 MHz, 10 dBm, 17 mA
315 MHz, 0 dBm, 10 mA
Programmable low battery voltage indicator
24-lead TSSOP
The fractional-N PLL and VCO with external inductor enable
the user to select any frequency in the 75 MHz to 1 GHz band.
The fast lock times of the fractional-N PLL make the ADF7012
suitable in fast frequency hopping systems. The fine frequency
deviations available and PLL phase noise performance facilitates
narrow-band operation.
There are five selectable modulation schemes: binary frequency
shift keying (FSK), Gaussian frequency shift keying (GFSK),
binary on-off keying (OOK), Gaussian on-off keying (GOOK),
and amplitude shift keying (ASK). In the compensation register,
APPLICATIONS
the output can be moved in <1 ppm steps so that indirect com-
pensation for frequency error in the crystal reference can be made.
Low cost wireless data transfer
Security systems
RF remote controls
A simple 3-wire interface controls the registers. In power-down,
the part has a typical quiescent current of <0.1 μA.
Wireless metering
Secure keyless entry
FUNCTIONAL BLOCK DIAGRAM
PRINTED
INDUCTOR
OSC1
OSC2
CLKOUT
L1 L2 CVCO
DVDD
DGND
TxCLK
÷CLK
÷R
OOK\ASK
PFD/
CHARGE
PUMP
+FRACTIONAL N
VCO
OOK\ASK
PA
VDD
RFOUT
RFGND
LDO
REGULATOR
CREG
TxDATA
LE
DATA
CLK
FSK\GFSK
SERIAL
INTERFACE
FREQUENCY
COMPENSATION
CENTER
FREQUENCY
Σ-Δ
PLL LOCK
DETECT
BATTERY
MONITOR
MUXOUT
MUXOUT
RSET
CE AGND
Figure 1.
Rev. A
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 ©2007–2009 Analog Devices, Inc. All rights reserved.






ADF7012 Datasheet, Funktion
ADF7012
TIMING CHARACTERISTICS
DVDD = 3 V ± 10%; AGND = DGND = 0 V; TA = TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
t1
t2
t3
t4
t5
t6
t7
Limit at TMIN to TMAX (B Version)
20
10
10
25
25
10
20
Unit
ns min
ns min
ns min
ns min
ns min
ns min
ns min
Test Conditions/Comments
LE setup time
Data-to-clock setup time
Data-to-clock hold time
Clock high duration
Clock low duration
Clock-to-LE setup time
LE pulse width
CLK
t4 t5
DATA
DB23 (MSB)
LE
t1
LE
t2 t3
DB22
DB2
DB1
(CONTROL BIT C2)
Figure 2. Timing Diagram
DB0 (LSB)
(CONTROL BIT C1)
t7
t6
Rev. A | Page 5 of 28

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ADF7012 pdf, datenblatt
915 MHz
–40
–60
–80
–100
–120
–140
–160
–180
–200
1.0k
= NORMAL
FREQUENCY = 992.38 kHz
LEVEL = –102.34dBc/Hz
10.0k
100.0k
PHASE NOISE (Hz)
1.0M
10.0M
Figure 21. Phase Noise Response—ICP = 1.44 mA, IVCO = 3.0 mA,
RFOUT = 915.2 MHz, PFD =10 MHz, Power = 10 dBm, PA Bias = 5.5 mA
REF LVL
15dBm
15
10
0
–10
–20 1MAX
RBW 10kHz RF ATT 40dB
3.88dBm VBW 300kHz
915.19098196MHz SWT 15ms UNIT dBm
1A
1MA
–30
–40
–50
–60
–70
–80
–85
CENTER 915.190982MHz
50kHz/
SPAN 500kHz
Figure 22. FSK Modulation, Power = 10 dBm, Data Rate = 38.4 kbps,
FDEVIATION = ±19.2 kHz
REF LVL
15dBm
15
10
0
–10
–20
9.94dBm
915.23167977MHz
RBW 10kHz
VBW 300kHz
SWT 100ms
1
RF ATT
UNIT
40dB
dBm
*
A
SGL
1MA
–30
–40 D1 –41.5dBm
–50 D1 –49.5dBm
–60
–70
–80
–85
CENTER 915.2MHz
40MHz/
SPAN 400MHz
Figure 23. Spurious Components—Meets FCC Specs
ADF7012
REF LVL
15dBm
15
10 1
RBW 50MHz RF ATT 40dB
10.25dBm VBW 50MHz
907.81563126MHz SWT 6.4s UNIT dBm
A
0
2
–10
–20 1MAX
34
1MA
–30
–40 D1 –41.5dBm
–50
–60
1 [T1]
10.25dBm 3 [T1]
–70 907.81563126MHz
2 [T1]
–10.06dBm 4 [T1]
–80 1.83126253GHz
–85
CENTER 3.8GHz
640MHz/
–20.29dBm
2.74188377GHz
–17.50dBm
3.65250501GHz
SPAN 6.4GHz
Figure 24. Harmonic Response, RFOUT Matched to 50 Ω, No Filter
REF LVL
15dBm
15
10 1
0
–10
–20 1MAX
RBW 50MHz RF ATT 40dB
9.06dBm VBW 50MHz
907.81563126MHz SWT 6.4s UNIT dBm
A
1MA
–30
–40 2 3 4 D1 –41.5dBm
–50
–60
1 [T1]
9.06dBm 3 [T1]
–70 907.81563126MHz
2 [T1]
–48.40dBm 4 [T1]
–80 1.83126253GHz
–85
CENTER 3.8GHz
640MHz/
–46.22dBm
2.74188377GHz
–46.96dBm
3.65250501GHz
SPAN 6.4GHz
Figure 25. Harmonic Response, Fifth-Order Chebyshev Filter
Rev. A | Page 11 of 28

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