AD8348 Analog Devices, AD8348 Datasheet
AD8348
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AD8348 Summary of contents
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... QAM/QPSK Demodulator W-CDMA/CDMA/GSM/NADC Wireless Local Loop LMDS/MMDS General Description The AD8348 is a broadband quadrature demodulator with an integrated intermediate frequency (IF) variable-gain amplifier (VGA) and integrated baseband amplifiers suitable for use in communications receivers, performing quadrature demodulation from IF directly to baseband frequencies. The baseband amplifiers have been designed to directly interface with dual channel A-to-D converters such as the AD9201, AD9283, and AD9218 for digitizing and post-processing ...
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... PRELIMINARY TECHNICAL DATA AD8348-SPECIFICATIONS Parameter GENERAL LO Frequency Range IF Frequency Range Baseband bandwidth LO Input Level LO Input Impedance VGIN Input Level REFERENCE VOLTAGE V REF POWER SUPPLIES Voltage Current Active Current Standby (V = 5V =500MHz unless otherwise noted) Condition External input must frequency 50 Ω ...
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... Small-signal 3dB bandwidth LO=1GHz (LOIP/LOIN 2GHz, single- ended Min Typ Max 150 ||1pF 190 ||1pF 230 ||1pF 45 +/-1 33 -14 500 -23 10 12.5 -125 10 TBD 60 0.6 0.3 40 2.5 AD8348 Units || MHz dB p-p dBm dBm dBm dBm dBm dB dBm mVp-p MHz MHz deg RMS dB mA ...
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... PRELIMINARY TECHNICAL DATA AD8348 Parameter IF FRONT-END WITHOUT VGA Zin Conversion Gain Conversion Gain 3 dB Bandwidth IF Gain Flatness 2nd Order Input Intercept(IIP2) 3rd Order Input Intercept(IIP3) 1dB Input compression point Noise Figure Input LO Leakage Output LO Leakage Demodulation Bandwidth Quadrature Phase Error I/Q Amplitude Imbalance ...
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... Model AD8348XXX AD8348-EVAL Rev. PrF 2/11/03 ORDERING GUIDE Temp. Range Package Description 28-Lead TSSOP Thin Shrink Small Outline Package - +85 C Evaluation Board - 5 - AD8348 PIN CONFIGURATION ESD SENSITIVE DEVICE Package Option RU-28 ...
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... PRELIMINARY TECHNICAL DATA AD8348 Pin Name 1,28 LOIP,LOIN LO Input. For optimum performance, these inputs should be driven differentially. Typical input drive level is equal to –10 dBm. To obtain a broadband 50 and LOIN. 2, 12, VPS1, VPS2, Positive Supply for LO, IF, and Biasing & Baseband sections respectively. Each of these pins should be ...
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... The amplifiers use voltage feedback to linearize the gain over the demolation bandwidth. These amplifiers can be used to maximize the dynamic range at the input of an ADC following the AD8348. The input to the baseband amplifiers IAIN (QAIN) feeds into the base of a bipolar transistor with an input impedance of roughly 100kohm ...
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... The basic connections described here refer to the AD8348 evaluation board. The schematic for the evaluation board is shown in Figure 1. Power Supply The voltage supply for the AD8348, between 2.7V and 5V, should be connected to the +Vs test point and ground should be connected to one of the GND test points. Device Enable To enable the device, the pin ENBL should be driven to +Vs ...
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... PRELIMINARY TECHNICAL DATA Evaluation Board Figure 1 shows the schematic for the AD8348 evaluation board. Note that uninstalled components are indicated with the “OPEN” designation. The board is powered by a single supply in the range of 2.7 to 5.5 V. Table I details the various configuration options of the evaluation board. ...
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... AD8348 Figure 3. Evaluation Board Top Silkscreen. Figure 2. Evaluation Board Top Layer Rev. PrF 2/11/03 ...
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... PRELIMINARY TECHNICAL DATA Rev. PrF 2/11/03 Figure 4. Evaluation Board Bottom Layer. Figure 5. Evaluation Board Bottom Silkscreen AD8348 ...
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... AD8348 Table I Evaluation Board Configuration Options Component Function +Vs, GND Power Supply and Ground Vector Pins SW11, ENBL Device Enable: Place SW11 in the ENBL position to connect the ENBL pin to +Vs. Place in the DENBL position to disable the device by grounding the pin ENBL through a 50 Ohm pull down resistor. The device may also be enabled via an external voltage applied to ENBL or VENB ...
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... Rev. PrF 2/11/03 LK1 x OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 28-Lead TSSOP (RU-28) 0.386 (9.80) 0.378 (9.60 0.177 (4.50) 0.169 (4.30) 0.256 (6.50) 0.246 (6.25 PIN 1 0.006 (0.15) 0.0433 (1.10) MAX 0.002 (0.05) 8 deg 0.0256 (0.65) 0.0118 (0.30) 0 deg SEATING 0.0079 (0.20) BSC 0.0075 (0.19) PLANE 0.0035 (0.090 AD8348 LK2 LK3 LK4 0.028 (0.70) 0.020 (0.50) ...