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Part Number: ADF4208
Description: The ADF4206 family of dual frequency synthesizers can be used to implement local oscillators in the upconversion and do...
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ADF4208
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DataSheet
General Description
ADF4208 General Description
The ADF4206 family of dual frequency synthesizers can be used to implement local oscillators in the upconversion and downconversion sections of wireless receivers and transmitters. Each synthesizer consists of a low-noise digital PFD (Phase Frequency Detector), a precision charge pump, a programmable reference divider, programmable A and B counters and a dualmodulus prescaler (P/P + 1). The A (6-bit) and B (11-bit) counters, in conjunction with the dual modulus prescaler (P/P + 1), implement an N divider (N = BP + A). In addition, the 14-bit reference counter (R Counter), allows selectable REFIN frequencies at the PFD input. The on-chip oscillator circuitry allows the reference input to be derived from crystal oscillators. A complete PLL (Phase-Locked Loop) can be implemented if the synthesizers are used with an external loop filter and VCOs (Voltage Controlled Oscillators). Control of all the on-chip registers is via a simple 3-wire interface. The devices operate with a power supply ranging from 2.7 V to 5.5 V and can be powered down when not in use.
ADF4208 Maximum Ratings
VDD1 to GND3. . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +7 V
VDD1 to VDD2 . . . . . . . . . . . . . . . . . . . . . .0.3 V to +0.3 V
VP1, VP2 to GND . . . . . . . . . . . . . . . . . . . . . 0.3 V to +7 V
VP1, VP2 to VDD1 . . . . . . . . . . . . . . . . . . .0.3 V to +5.5 V
Digital I/O Voltage to GND . . . . . . 0.3 V to DVDD + 0.3 V
Analog I/O Voltage to GND . . . . . . . . 0.3 V to VP + 0.3 V
OSCIN, OSCOUT, RF1IN (A, B),
RF2IN (A, B) to GND . . . . . . . . . . . . 0.3 V to VDD + 0.3 V
RFINA to RFINB (RF1, RF2) . . . . . . . . . . . . . . . . . ±320 mV
Operating Temperature Range
Industrial (B Version) . . . . . . . . . . . . . . . 40°C to +85°C
Storage Temperature Range . . . . . . . . .65°C to +150°C
Maximum Junction Temperature . . . . . . . . . . . . . . . 150°C
TSSOP JA Thermal Impedance . . . . . . . . . . . . 150.4°C/W
VDD1 to VDD2 . . . . . . . . . . . . . . . . . . . . . .0.3 V to +0.3 V
VP1, VP2 to GND . . . . . . . . . . . . . . . . . . . . . 0.3 V to +7 V
VP1, VP2 to VDD1 . . . . . . . . . . . . . . . . . . .0.3 V to +5.5 V
Digital I/O Voltage to GND . . . . . . 0.3 V to DVDD + 0.3 V
Analog I/O Voltage to GND . . . . . . . . 0.3 V to VP + 0.3 V
OSCIN, OSCOUT, RF1IN (A, B),
RF2IN (A, B) to GND . . . . . . . . . . . . 0.3 V to VDD + 0.3 V
RFINA to RFINB (RF1, RF2) . . . . . . . . . . . . . . . . . ±320 mV
Operating Temperature Range
Industrial (B Version) . . . . . . . . . . . . . . . 40°C to +85°C
Storage Temperature Range . . . . . . . . .65°C to +150°C
Maximum Junction Temperature . . . . . . . . . . . . . . . 150°C
TSSOP JA Thermal Impedance . . . . . . . . . . . . 150.4°C/W
ADF4208 Features
ADF4206: 550 MHz/550 MHz
ADF4207: 1.1 GHz/1.1 GHz
ADF4208: 2.0 GHz/1.1 GHz
2.7 V to 5.5 V Power Supply
Selectable Charge Pump Supply (VP) Allows Extended Tuning Voltage in 3 V Systems
Selectable Charge Pump Currents
On-Chip Oscillator Circuit
Selectable Dual Modulus Prescaler
RF2: 32/33 or 64/65
RF1: 32/33 or 64/65
3-Wire Serial Interface
Power-Down Mode
ADF4207: 1.1 GHz/1.1 GHz
ADF4208: 2.0 GHz/1.1 GHz
2.7 V to 5.5 V Power Supply
Selectable Charge Pump Supply (VP) Allows Extended Tuning Voltage in 3 V Systems
Selectable Charge Pump Currents
On-Chip Oscillator Circuit
Selectable Dual Modulus Prescaler
RF2: 32/33 or 64/65
RF1: 32/33 or 64/65
3-Wire Serial Interface
Power-Down Mode
ADF4208 Typical Application
Wireless Handsets (GSM, PCS, DCS, CDMA, WCDMA)
Base Stations for Wireless Radio (GSM, PCS, DCS,CDMA, WCDMA)
Wireless LANS
Communications Test Equipment
CATV Equipment
Base Stations for Wireless Radio (GSM, PCS, DCS,CDMA, WCDMA)
Wireless LANS
Communications Test Equipment
CATV Equipment
ADF4208 Connection Diagram
ADF4208
PDF/DataSheet Download
- Datasheet: ADF4208
- File Size: 211188 KB
- Manufacturer: AD [Analog Devices]
- Click here to Download
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ADF4208 Relative Products
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The ADF4206 family of dual frequency synthesizers can be used to implement local oscillators in the upconversion and downconversion sections of wireless receivers and transmitters. Each ADF4206 consists of a low-noise digital PFD (Phase Frequency Detector), ...
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