AD8347ARUZ Analog Devices Inc, AD8347ARUZ Datasheet
AD8347ARUZ
Specifications of AD8347ARUZ
Available stocks
Related parts for AD8347ARUZ
AD8347ARUZ Summary of contents
Page 1
FEATURES Integrated RF and baseband AGC amplifiers Quadrature phase accuracy 1° typ I/Q amplitude balance 0.3 dB typ Third-order intercept (IIP3) +11.5 dBm @ min gain Noise figure max gain AGC range 69.5 dB Baseband level control ...
Page 2
AD8347 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. 6 Typical Performance Characteristics ...
Page 3
SPECIFICATIONS 25° 1.9 GHz VCMO otherwise noted. Table 1. Parameter OPERATING CONDITIONS LO/RF Frequency Range LO Input Level VGIN Input Level SUPPLY S Temperature Range ...
Page 4
AD8347 Parameter CONTROL INPUT/OUTPUTS VCMO Input Gain Control Input Bias Current Offset Input Overriding Current VREF Output RESPONSE FROM RF INPUT TO FINAL BB AMP Gain @ V = 0.2 V VGIN Gain @ V = 1.2 V VGIN Gain ...
Page 5
ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage VPS1, VPS2, VPS3 LO and RF Input Power Internal Power Dissipation θ JA Maximum Junction Temperature Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering 60 sec) ESD CAUTION ESD (electrostatic discharge) ...
Page 6
AD8347 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 3. Pin Function Descriptions Equiv. Pin No. Mnemonic Circuit Description 1, 28 LOIN, LOIP A LO Input. For optimum performance, these inputs are differentially driven. Typical input drive level is equal to −8 ...
Page 7
Equiv. Pin No. Mnemonic Circuit Description 18, 20 VDT2, VDT1 D Detector Inputs. These pins are the inputs to the on-board detector. VDT2 and VDT1, which have high input impedances, are normally connected to IMXO and QMXO, respectively. 19 VAGC ...
Page 8
AD8347 TYPICAL PERFORMANCE CHARACTERISTICS RF AMP AND DEMODULATOR –40° +85° +25° – +25°C A –10 –15 – ...
Page 9
V = 2.7V 5V +85° 2.7V +25° 5V –1 V ...
Page 10
AD8347 –10 –12 – 5V +85° – 2.7V +85° –18 – 5V +25°C – – 5V –40°C S ...
Page 11
BASEBAND OUTPUT AMPLIFIERS –40° –40° +25° +85° 2. ...
Page 12
AD8347 RF AMP/DEMOD AND BASEBAND OUTPUT AMPLIFIERS –40° 2. –40° +25° 2. +25° ...
Page 13
LO PORT WITHOUT TERMINATION –4 –6 –8 –10 –12 LO PORT WITH TERMINATION –14 800 1000 1200 1400 1600 1800 2000 2200 RF FREQUENCY (MHz) Figure 32. Return Loss of LOIP vs 0.7 V, ...
Page 14
AD8347 EQUIVALENT CIRCUITS VPS1 LOIN LOIP COM1 Figure 36. Circuit A VPS3 IOPP , IOPN, QOPP , QOPN, IMXO, QMXO COM3 Figure 37. Circuit B VPS3 VCMO CURRENT MIRROR COM3 Figure 38. Circuit C PHASE SPLITTER CONTINUES Rev ...
Page 15
VPS3 VREF COM3 Figure 42. Circuit G VPS3 ENBL COM3 Figure 43. Circuit H Figure 44. Circuit I Rev Page AD8347 VPS3 VAGC COM3 ...
Page 16
AD8347 THEORY OF OPERATION VPS1 VPS2 2 12 AD8347 BIAS ENBL 15 CELL RFIN 10 RFIP 11 GAIN VGIN 17 CONTROL INTERFACE The AD8347 is a direct I/Q demodulator usable in digital wireless communication systems including cellular, PCS, and digital ...
Page 17
RC constants. Each branch goes through a buffer to make up for the loss and high frequency roll-off. The output from the buffers then goes into another polyphase phase splitter to enhance the accuracy of phase ...
Page 18
AD8347 APPLICATIONS BASIC CONNECTIONS The basic connections for operating the AD8347 are shown in Figure 46. The device is powered through three power supply pins: VPS1, VPS2, and VPS3. These pins supply current to different parts of the overall circuit. ...
Page 19
LO LOIN 200 Ω AD8347 LOIP 100pF Figure 47. Single-Ended LO Drive OPERATING THE VGA A three-stage VGA sets the gain in the RF section. Two of the three stages come before the mixer while the third amplifies the ...
Page 20
AD8347 +V + 0.1 μ F 0.1 μ F 0.1 μ F 100pF 100pF VPS1 VPS2 2 12 AD8347 BIAS 15 CELL ENBL C1 100pF RFIN 10 R1 200 Ω RFIP 11 C2 100pF RF ...
Page 21
The differential output offset voltages of the baseband amplifiers are typically ±50 mV. This offset voltage results from both input and output effects. The overall signal-to-noise ratio can be improved by increasing the VGA gain by driving it with an ...
Page 22
AD8347 FREQUENCY (MHz) Figure 52. Group Delay of 20 MHz Baseband Low-Pass Filter If the VGA is operating in AGC mode, the detector inputs (VDT1 and VDT2) ...
Page 23
EVALUATION BOARD Figure 53 shows the schematic of the AD8347 evaluation board. Note that uninstalled components are indicated with the open designation. The board is powered by a single supply in the range of 2 5.5 V. Table ...
Page 24
AD8347 Figure 55. Layout of Component Side Figure 54. Silkscreen of Component Side Rev Page Figure 56. Layout of Circuit Side ...
Page 25
Table 4. Evaluation Board Configuration Options Component Function TP1, TP4, TP5 Power Supply and Ground Vector Pins. TP2, TP6 IOFS and QOFS Probe Points. TP3 VREF Probe Point. LK1, J11 Baseband Amplifier Output Bias. Installing this link connects VREF to ...
Page 26
... AD8347 OUTLINE DIMENSIONS PIN 1 0.15 0.05 COPLANARITY ORDERING GUIDE Model Temperature Range AD8347ARU −40°C to +85°C AD8347ARU-REEL7 −40°C to +85°C AD8347ARUZ 1 −40°C to +85°C 1 AD8347ARUZ-REEL7 −40°C to +85°C AD8347-EVAL Pb-free part. 9.80 9.70 9. 4.50 4.40 4. 0.65 BSC 1 ...
Page 27
NOTES Rev Page AD8347 ...
Page 28
AD8347 NOTES © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C02675-0-10/05(A) Rev Page ...