AD8348ARU Analog Devices Inc, AD8348ARU Datasheet
AD8348ARU
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AD8348ARU Summary of contents
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FEATURES Integrated I/Q demodulator with IF VGA amplifier Operating IF frequency 50 MHz to 1000 MHz ( 500 MHz driven from R Demodulation bandwidth 75 MHz Linear-in-decibel AGC range 44 dB Third-order intercept IIP3 +28 dBm ...
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AD8348 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. 7 Equivalent Circuits ........................................................................... ...
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SPECIFICATIONS 380 MHz otherwise noted. Table 1. Parameter OPERATING CONDITIONS LO Frequency Range IF Frequency Range Baseband Bandwidth LO Input Level ...
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AD8348 Parameter IF FRONT END WITHOUT VGA Input Impedance Conversion voltage Gain 3 dB Output Bandwidth IF Gain Flatness Input 1 dB Compression Point (P1dB) Third-Order Input Intercept (IIP3) LO Leakage Demodulation Bandwidth Quadrature Phase Error I/Q Amplitude Imbalance Noise ...
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Parameter POWER-UP CONTROL ENBL Threshold Low ENBL Threshold High Input Bias Current Power-Up Time Power-Down Time POWER SUPPLIES Voltage Current (Enabled) Current (Standby) These parameters are guaranteed but not tested in production. Limits are ±6 Σ from the mean. 1 ...
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AD8348 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage on VPOS1, VPOS2, VPOS3 Pins LO Input Power IF Input Power Internal Power Dissipation θ JA Maximum Junction Temperature Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering, 60 sec) ESD ...
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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 3. Pin Function Descriptions—28-Lead TSSOP Pin No. Mnemonic Description 1, 28 LOIP, LOIN LO Inputs. For optimum performance, these inputs should be ac-coupled and driven differentially. Differential drive from single-ended sources can be achieved ...
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AD8348 Pin No. Mnemonic Description 15 ENBL Chip Enable Input. Active high. Threshold is equal VGIN Gain Control Input. The voltage on this pin controls the gain on the IF VGA. The gain control voltage range is ...
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EQUIVALENT CIRCUITS VPOS1 LOIN LOIP COM1 Figure 3. Circuit A COM3 Figure 4. Circuit B VPOS3 VCMO COM3 Figure 5. Circuit C VPOS3 IOPP, IOPN, QOPP, QOPN VCMO Rev Page VPOS3 IAIN, QAIN, VGIN, ENBL, ...
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AD8348 VPOS2 VREF COM2 Figure 9. Circuit G COM3 Figure 10. Circuit H VPOS3 IMXO, QMXO Rev Page VPOS3 MXIP MXIN COM3 Figure 11. Circuit I ...
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TYPICAL PERFORMANCE CHARACTERISTICS VGA AND DEMODULATOR 30 LINERR T = +85° 5V, FREQ = 380MHz POS 25 LINERR T = +25° 5V, FREQ = 380MHz POS 20 LINERR T = –40° 5V, FREQ = ...
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AD8348 27 5V, 0.2V, +25° 2.7V, 0.2V, +85°C 24 2.7V, 0.2V, +25°C 23 2.7V, 0.2V, –40°C 22 5V, 0.2V, +85° BASEBAND FREQUENCY (MHz) Figure 18. Gain ...
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BASEBAND FREQUENCY (MHz) Figure 24. IIP3 vs. F ...
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AD8348 DEMODULATOR USING MXIP AND MXIN 11.0 10.5 TEMP = –40°C, V POS 10.0 TEMP = –40°C, V 9.5 TEMP = +25° POS 9.0 TEMP = +25° 2.7V POS 8.5 TEMP = +85°C, V ...
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FINAL BASEBAND AMPLIFIERS 21 –40° +25°C, 2.7V 19 +25° +85° BASEBAND FREQUENCY (MHz) Figure 33. Gain vs VREF = ...
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AD8348 VGA/DEMODULATOR AND BASEBAND AMPLIFIER 2.0 1.5 1.0 2.7V, 0.2V, –40°C 0.5 0 2.7V, 0.2V, +85°C –0.5 5V, 0.2V, +25°C –1.0 –1.5 –2.0 100 200 300 400 500 600 IF FREQUENCY (MHz) Figure 37. Quadrature Phase Error vs ...
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CAPACITANCE) 240 220 200 180 160 (SHUNT RESISTANCE) 140 120 100 IF FREQUENCY (MHz) Figure 43. Input Impedance of Mixer Input vs 120 150 MX INPUTS WITH 4:1 BALUN 180 MXIP INPUT PIN ...
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AD8348 THEORY OF OPERATION VREF IMXO IOFS BIAS VREF ENBL 15 CELL IFIP 11 IFIN 10 GAIN VGIN 17 CONTROL VCMO MXIP MXIN ENVG QXMO QOFS Figure 48. Functional Block Diagram VGA ...
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VCMO. This forms a high-pass response for the baseband signal path with a lower 3 dB frequency π × Ω × PASS 2 2650 COFS Alternatively, the user can externally adjust the dc offset by driving ...
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AD8348 APPLICATIONS BASIC CONNECTIONS Figure 49 shows the basic connections schematic for the AD8348. J21 T21 ETC1-1- C21 C22 R21 1000pF 1000pF 60.4Ω AD8348 1 LOIP LOIN VPOS1 COM1 27 S C52 ...
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MXIN 19 MXIP 18 1000pF Figure 53. Driving the MX Inputs from a Differential Source If the MX inputs are to be driven from a single-ended 50 Ω source, a 4:1 balun can be used to transform the 200 ...
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AD8348 The level of the mixer output (or the output of the baseband filter) can then be set by varying the setpoint voltage fed to Pin 11 (VSET) of the AD8362. Care should be taken to ensure that blockers—unwanted signals ...
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LO GENERATION Analog Devices has a line of PLLs that can be used for generating the LO signal. Table 4 lists the PLLs and their maximum frequency and phase noise performance. Table 4. ADI PLL Selection Table Frequency F IN ...
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AD8348 differential impedance of 200 Ω (100 Ω per side). The differential inputs should then be fed into SMA connectors MXIP and MXIN. Mixer Outputs The I and Q mixer outputs are available through the IMXO and QMXO SMA connectors. ...
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Figure 61. Evaluation Board Top Layer Figure 62. Evaluation Board Top Silkscreen Rev Page AD8348 ...
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AD8348 Figure 63. Evaluation Board Bottom Layer Figure 64. Evaluation Board Bottom Silkscreen Rev Page ...
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Table 6. Evaluation Board Configuration Options Component Function V , GND Power supply and ground vector pins. S SW11, ENBL Device enable: Place SW11 in the ENBL position to connect the ENBL pin to V the DENBL position to disable ...
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... Temperature Range AD8348ARU −40°C to +85°C AD8348ARU-REEL7 −40°C to +85°C 1 AD8348ARUZ −40°C to +85°C AD8348ARUZ-REEL7 1 −40°C to +85°C AD8348-EVAL Pb-free part. ©2006 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. ...