AD8313ARM Analog Devices Inc, AD8313ARM Datasheet
AD8313ARM
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AD8313ARM Summary of contents
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FEATURES Wide bandwidth: 0.1 GHz to 2.5 GHz min High dynamic range ±3.0 dB High accuracy: ±1.0 dB over 65 dB range (@ 1.9 GHz) Fast response full-scale typical Controller mode with error output Scaling ...
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AD8313 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configurations and Function Description............................. 7 Typical Performance Characteristics ............................................. 8 Circuit Description......................................................................... 11 Interfaces.......................................................................................... 13 Power-Down Interface, PWDN................................................ 13 Signal Inputs, INHI, INLO ........................................................ 13 Logarithmic/Error ...
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SPECIFICATIONS kΩ, unless otherwise noted 25° Table 1. Parameter Conditions SIGNAL INPUT INTERFACE Specified Frequency Range DC Common-Mode Voltage Input Bias Currents Input Impedance f ...
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AD8313 Parameter Conditions 7 2.5 GHz Nominal conditions ±3 dB Dynamic Range Range Center ±1 dB Dynamic Range Slope Intercept 2.7 V ≤ V ±3 dB Dynamic Range Range Center ±1 dB Dynamic Range Slope Intercept Temperature Sensitivity P IN ...
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Except where otherwise noted; performance Minimum and maximum specified limits on parameters that are guaranteed but not tested are 6 sigma values. 3 Input impedance shown over frequency range in Figure 26. 4 Double vertical bars ...
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AD8313 ABSOLUTE MAXIMUM RATINGS Table 2. Supply Voltage V S VOUT, VSET, PWDN Input Power Differential (re: 50 Ω, 5.5 V) Input Power Single-Ended (re: 50 Ω, 5.5 V) Internal Power Dissipation θ JA Maximum Junction Temperature Operating Temperature Range ...
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PIN CONFIGURATIONS AND FUNCTION DESCRIPTION Table 3. Pin Function Descriptions Pin No. Mnemonic Description 1, 4 VPOS Positive Supply Voltage (VPOS INHI Noninverting Input. This input should be ac-coupled. 3 INLO Inverting Input. This ...
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AD8313 TYPICAL PERFORMANCE CHARACTERISTICS T = 25° input match shown in Figure 29, unless otherwise noted 2.0 1.8 1.6 1.4 1.2 1.9GHz 1.0 2.5GHz 0.8 0.6 0.4 900MHz 0.2 0 –70 –60 ...
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FREQUENCY (MHz) Figure 10. V Slope vs. Frequency for Multiple Temperatures OUT 24 23 SPECIFIED OPERATING RANGE 22 21 2.5GHz 20 100MHz 19 900MHz 18 1.9GHz ...
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AD8313 100.00 13.7mA 10.00 1. +3V V POS POS 0.10 0. PWDN VOLTAGE (V) Figure 16. Typical Supply Current vs. PWDN Voltage CH. 1 AND CH. 2: 1V/DIV CH. 1 GND CH. 2 GND ...
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CIRCUIT DESCRIPTION The AD8313 is an 8-stage logarithmic amplifier, specifically designed for use in RF measurement and power amplifier control applications at frequencies up to 2.5 GHz. A block diagram is shown in Figure 22. For a detailed description of ...
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AD8313 With Pins 7 and 8 connected (log amp mode), the output can be stated 100 dBm ) OUT SLOPE IN where P is the input power stated in dBm when the source ...
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INTERFACES This section describes the signal and control interfaces and their behavior. On-chip resistances and capacitances exhibit variations ±20%. These resistances are sometimes temperature-dependent, and the capacitances may be voltage- dependent. POWER-DOWN INTERFACE, PWDN The power-down threshold ...
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AD8313 SETPOINT INTERFACE, VSET The setpoint interface is shown in Figure 28. The voltage, V divided by a factor resistive attenuator of 18 kΩ total resistance. The signal is converted to a current by the action ...
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APPLICATIONS BASIC CONNECTIONS FOR LOG (RSSI) MODE Figure 29 shows the AD8313 connected in its basic measurement mode. A power supply between 2.7 V and 5 required. The power supply to each of the VPOS pins should be ...
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AD8313 INPUT COUPLING The signal can be coupled to the AD8313 in a variety of ways. In all cases, there must not path from the input pins to ground. Some of the possibilities include dual-input coupling capacitors, ...
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SOURCE C1 50Ω L MATCH C2 Figure 35. Narrow-Band Reactive Match Typically, the AD8313 needs to be matched to 50 Ω. The input impedance of the AD8313 at 100 MHz can be read from the Smith chart (Figure 26) ...
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AD8313 As previously discussed, a modification of the board layout produces networks that may not perform as specified. At 2.5 GHz, a shunt inductor is sufficient to achieve proper matching. Con- sequently, C1 and C2 are set sufficiently high that ...
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INCREASING OUTPUT CURRENT To drive a more substantial load, either a pull-up resistor or an emitter-follower can be used. In Figure 40 kΩ pull-up resistor is added at the output, which provides the load current necessary to drive ...
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AD8313 EVALUATION BOARD SCHEMATIC AND LAYOUT Figure 44 shows the schematic of the AD8313 evaluation board. Note that uninstalled components are indicated as open. This board contains the AD8313 as well as the AD8009 current- feedback operational amplifier. This is ...
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Figure 42. Layout of Signal Layer Figure 43. Signal Layer Silkscreen Rev Page AD8313 ...
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AD8313 R1 10Ω V PS1 C1 680pF INHI C2 680pF INLO R9 0Ω R2 10Ω R2 10Ω V PS1 Table 7. Evaluation Board Configuration Options Component Function VPS1, VPS2, Supply Pins. VPS1 is the positive supply pin for the AD8313. ...
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TRACE WIDTH 15 UNIT = MILS 27 Figure 45. Detail of PCB Footprint for Package and Pads for Matching Network 54.4 90 91.3 126 ...
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... AD8313ARM-REEL7 −40°C to +85°C 1 AD8313ARMZ −40°C to +85°C 1 AD8313ARMZ-REEL7 −40°C to +85°C AD8313-EVAL Pb-free part. © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 3.00 ...