AD8349AREZ Analog Devices Inc, AD8349AREZ Datasheet
AD8349AREZ
Specifications of AD8349AREZ
Available stocks
Related parts for AD8349AREZ
AD8349AREZ Summary of contents
Page 1
FEATURES Output frequency range: 700 MHz to 2700 MHz Modulation bandwidth 160 MHz (large signal BW output compression: 5.6 dBm @ 2140 MHz Output disable function: output below –50 dBm in < Noise floor: ...
Page 2
AD8349 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configuration and Functional Descriptions.......................... 6 Equivalent Circuits ........................................................................... 7 Typical Performance Characteristics ............................................. 8 Circuit Description......................................................................... 14 Overview...................................................................................... 14 LO Interface................................................................................. 14 V-to-I Converter......................................................................... 14 Mixers ...
Page 3
SPECIFICATIONS ambient temperature ( 25° –6 dBm; I/Q inputs = 1.2 V p-p differential sine waves in quadrature on a 400 bias; baseband frequency = 1 MHz; LO ...
Page 4
AD8349 Parameter Conditions Bandwidth (3 dB 1500 MHz, baseband input = 600 mV p-p sine wave on 400 1500 MHz, baseband input = 60 mV p-p sine wave on 400 mV dc OUTPUT ENABLE ...
Page 5
ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage VPOS IBBP, IBBN, QBBP, QBBN LOIP and LOIN Internal Power Dissipation θ (Exposed Paddle Soldered Down) JA Maximum Junction Temperature Operating Temperature Range Storage Temperature Range ESD CAUTION ESD (electrostatic discharge) sensitive ...
Page 6
AD8349 PIN CONFIGURATION AND FUNCTIONAL DESCRIPTIONS Table 3. Pin Function Descriptions Pin No. Mnemonic Description 1, 2, IBBP, IBBN, Differential In-Phase and Quadrature Baseband Inputs. These high impedance inputs must be 15, 16 QBBN, QBBP dc-biased to approximately 400 mV ...
Page 7
EQUIVALENT CIRCUITS VPS2 IBBP COM3 Figure 3. Circuit A VPS1 LOIN LOIP COM1 Figure 4. Circuit B VPS2 ENOP COM3 Figure 5. Circuit C 40Ω 40Ω Figure 6. Circuit D Rev Page AD8349 VPS2 VOUT ...
Page 8
AD8349 TYPICAL PERFORMANCE CHARACTERISTICS 5.25V 4.75V –1 –2 –3 –4 700 900 1100 1300 1500 1700 1900 2100 2300 2500 2700 ...
Page 9
V = 5.25V S –30 – 4.75V S – –45 –50 –55 –60 700 900 1100 1300 1500 1700 1900 2100 2300 2500 2700 LO FREQUENCY (MHz) Figure 13. Sideband ...
Page 10
AD8349 –10 3USB, dBc –15 SSB, dBm –20 –25 –30 –35 USB, dBC –40 –45 –50 LO, dBm –55 –60 –65 –70 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 BASEBAND DIFFERENTIAL INPUT VOLTAGE (V p-p) Figure 19. ...
Page 11
NOISE FLOOR (dBm/Hz) Figure 25. 20 MHz Offset Noise Floor Distribution at F (BB Inputs at a Bias of 400 mV with no AC ...
Page 12
AD8349 –140 –142 –144 –146 –148 WITH AC INPUT –150 –152 –154 WITHOUT AC INPUT –156 –158 –160 –10 –8 –6 –4 –2 LO INPUT (dBm) Figure 31. 20 MHz Offset Noise Floor vs. LO Input Power (F = 2140 ...
Page 13
CARRIER FEEDTHROUGH (dBm) Figure 37. Carrier Feedthrough Distribution and Q Inputs Driven in Quadrature at 1 ...
Page 14
AD8349 CIRCUIT DESCRIPTION OVERVIEW The AD8349 can be divided into five sections: the local oscil- lator (LO) interface, the baseband voltage-to-current (V-to-I) converter, the mixers, the differential-to-single-ended (D-to-S) amplifier, and the bias circuit. A detailed block diagram of the device ...
Page 15
BASIC CONNECTIONS The basic connections for operating the AD8349 are shown in Figure 43. A single power supply of between 4.75 V and 5 applied to pins VPS1 and VPS2. A pair of ESD protection diodes connect internally ...
Page 16
AD8349 10kΩ 866Ω 499Ω 49.9Ω 0.1µF 499Ω 24.8Ω 499Ω 49.9Ω 0.1µF 499Ω 24.9Ω LO INPUT DRIVE LEVEL The local oscillator inputs are designed to be driven differen- tially. The device is specified with an LO drive ...
Page 17
LO FREQUENCY (MHz) Figure 45. Sideband Suppression below 700 MHz 0 –1 USB –2 –3 –4 SSB –5 –6 –7 –8 2700 2750 2800 2850 2900 LO ...
Page 18
AD8349 –2 –4 –6 – TIME (ns) Figure 50. ENOP Disable Time, 900 MHz BASEBAND DAC INTERFACE The recommended baseband input swing and bias levels of the AD8349’s differential baseband inputs ...
Page 19
THIRD HARMONIC = –36.8dBc –10 –20 –30 –40 –50 –60 –70 –80 –90 Figure 53. AD8349 Single Sideband Spectrum at 2140 MHz REDUCING UNDESIRED SIDEBAND LEAKAGE Undesired sideband leakage is the result of phase and amplitude imbalances between ...
Page 20
AD8349 10 0 –10 THIRD HARMONIC = –36.8dBc –20 –30 –40 –50 –60 –70 –80 –90 Figure 55. AD8349 Single Sideband Spectrum at 2140 MHz after LO Nulling SIDEBAND SUPPRESSION AND LO FEEDTHROUGH VS. TEMPERATURE In practical applications, reduction of ...
Page 21
APPLICATIONS 3GPP WCDMA SINGLE-CARRIER APPLICATION The interpolation filter used for the measurement of WCDMA performance is shown in Figure 57. This third order Bessel filter has bandwidth of 12 MHz. While the 3GPP single channel bandwidth is ...
Page 22
AD8349 –54 –55 –56 –57 2140 ADJ CPR –58 1960 ADJ CPR –59 –60 –61 –62 2140 ALT CPR –63 –64 1960 NOISE –65 2140 NOISE –66 –29 –28 –27 –26 –25 –24 –23 –22 –21 –20 –19 –18 –17 ...
Page 23
SOLDERING INFORMATION The AD8349 is available in a 16-lead TSSOP package with an exposed paddle. The exposed paddle must be soldered to the exposed metal of a ground plane for a lowered thermal impedance and reduced inductance to ground. This ...
Page 24
AD8349 EVALUATION BOARD A populated AD8349 evaluation board is available. The AD8349 has an exposed paddle underneath the package, which is soldered to the board. The evaluation board is YuPing Toh Mike Chowkwanyun Figure 66. Layout of Evaluation Board, Top ...
Page 25
C8 OPEN R1 IP 0Ω 0Ω C11 OPEN TP4 GND R3 C1 200Ω 100pF R6 C2 OPEN 100pF ETC-1-1-13 200Ω 0Ω 0.1µF 100pF R10 10kΩ ENOP C9 AD 8349 OPEN ...
Page 26
AD8349 CHARACTERIZATION SETUPS SSB SETUP The primary setup used to characterize the AD8349 is shown in Figure 69. This setup was used to evaluate the product as a single-sideband modulator. The interface board has circuitry that converts the single-ended I ...
Page 27
... OUTLINE DIMENSIONS Figure 70. 16-Lead Thin Shrink Small Outline with Exposed Pad [TSSOP/EP] ORDERING GUIDE Model Temperature Range (°C) AD8349ARE –40 to +85 AD8349ARE-REEL7 –40 to +85 1 AD8349AREZ –40 to +85 AD8349AREZ-REEL7 1 –40 to +85 AD8349-EVAL Pb-free part. 5.10 5.00 4. 4.50 TOP 6.40 4.40 VIEW BSC 4 ...
Page 28
AD8349 NOTES © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. C03570-0-11/04(A) Rev Page ...