AD8317ACPZ-R7 Analog Devices Inc, AD8317ACPZ-R7 Datasheet

IC AMP LOG DETECT 8GHZ 8-LFCSP

AD8317ACPZ-R7

Manufacturer Part Number
AD8317ACPZ-R7
Description
IC AMP LOG DETECT 8GHZ 8-LFCSP
Manufacturer
Analog Devices Inc
Type
Logarithmic Amplifierr
Datasheet

Specifications of AD8317ACPZ-R7

Applications
Receiver Signal Strength Indication (RSSI)
Mounting Type
Surface Mount
Package / Case
8-LFCSP
No. Of Amplifiers
1
Dynamic Range, Decades
55
Response Time
20ns
Supply Voltage Range
3V To 5.5V
Amplifier Case Style
LFCSP
No. Of Pins
8
Supply Current
22mA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
AD8317ACPZ-R7TR
FEATURES
Wide bandwidth: 1 MHz to 10 GHz
High accuracy: ±1.0 dB over temperature
55 dB dynamic range up to 8 GHz ± 3 dB error
Stability over temperature: ±0.5 dB
Low noise measurement/controller output, VOUT
Pulse response time: 6 ns/10 ns (fall/rise)
Small footprint, 2 mm × 3 mm LFCSP
Supply operation: 3.0 V to 5.5 V @ 22 mA
Fabricated using high speed SiGe process
APPLICATIONS
RF transmitter PA setpoint control and level monitoring
Power monitoring in radio link transmitters
RSSI measurement in base stations, WLANs, WiMAX, and radars
GENERAL DESCRIPTION
The AD8317 is a demodulating logarithmic amplifier, capable
of accurately converting an RF input signal to a corresponding
decibel-scaled output. It employs the progressive compression
technique over a cascaded amplifier chain, each stage of which
is equipped with a detector cell. The device can be used in either
measurement or controller modes. The AD8317 maintains
accurate log conformance for signals of 1 MHz to 8 GHz and
provides useful operation to 10 GHz. The input dynamic range
is typically 55 dB (re: 50 Ω) with less than ±3 dB error. The
AD8317 has 6 ns/10 ns response time (fall time/rise time) that
enables RF burst detection to a pulse rate of beyond 50 MHz.
The device provides unprecedented logarithmic intercept stability
vs. ambient temperature conditions. A supply of 3.0 V to 5.5 V
is required to power the device. Current consumption is typically
22 mA, and it decreases to 200 μA when the device is disabled.
The AD8317 can be configured to provide a control voltage to a
power amplifier or a measurement output from the VOUT pin.
Because the output can be used for controller applications, special
attention has been paid to minimize wideband noise. In this
mode, the setpoint control voltage is applied to the VSET pin.
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
The feedback loop through an RF amplifier is closed via VOUT,
the output of which regulates the output of the amplifier to a
magnitude corresponding to V
(V
controller applications. As a measurement device, VOUT is
externally connected to VSET to produce an output voltage,
V
signal amplitude.
The logarithmic slope is −22 mV/dB, determined by the VSET
interface. The intercept is 15 dBm (re: 50 Ω, CW input) using
the INHI input. These parameters are very stable against supply
and temperature variations.
The AD8317 is fabricated on a SiGe bipolar IC process and is
available in a 2 mm × 3 mm, 8-lead LFCSP with an operating
temperature range of −40°C to +85°C.
INLO
INHI
OUT
POS
, that is a decreasing linear-in-dB function of the RF input
− 0.1 V) output capability at the VOUT pin, suitable for
DET
FUNCTIONAL BLOCK DIAGRAM
Log Detector/Controller
1 MHz to 10 GHz, 55 dB
©2005–2008 Analog Devices, Inc. All rights reserved.
DET
GAIN
BIAS
VPOS
DET
Figure 1.
SET
. The AD8317 provides 0 V to
SLOPE
COMM
DET
TADJ
AD8317
www.analog.com
I
I
V
V
VSET
VOUT
CLPF

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AD8317ACPZ-R7 Summary of contents

Page 1

FEATURES Wide bandwidth: 1 MHz to 10 GHz High accuracy: ±1.0 dB over temperature 55 dB dynamic range GHz ± error Stability over temperature: ±0.5 dB Low noise measurement/controller output, VOUT Pulse response time: 6 ...

Page 2

AD8317 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 ...

Page 3

SPECIFICATIONS 1000 pF 25°C, 52.3 Ω termination resistor at INHI, unless otherwise noted. POS LPF A Table 1. Parameter SIGNAL INPUT INTERFACE Specified Frequency Range DC Common-Mode Voltage MEASUREMENT MODE f = ...

Page 4

AD8317 Parameter f = 5.8 GHz Input Impedance ±1 dB Dynamic Range Maximum Input Level Minimum Input Level 1 Slope 1 Intercept Output Voltage, High Power In Output Voltage, Low Power 8.0 GHz Input Impedance ±1 dB ...

Page 5

ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Supply Voltage, V POS V Voltage SET Input Power (Single-Ended, Re: 50 Ω) Internal Power Dissipation θ JA Maximum Junction Temperature Operating Temperature Range Storage Temperature Range Lead Temperature (Soldering, 60 sec) Stresses above ...

Page 6

AD8317 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 3. Pin Function Descriptions Pin No. Mnemonic Description 1 INHI RF Input. Nominal input range of −50 dBm to 0 dBm, re: 50 Ω; ac-coupled RF input. 2 COMM Device Common. Connect to ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS +25°C, −40°C, +85°C; C POS A by using the best-fit line between P = −40 dBm and P IN 2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 0 –60 –55 –50 ...

Page 8

AD8317 2.00 1.75 1.50 1.25 1.00 0.75 0.50 0.25 0 –60 –55 –50 –45 –40 –35 –30 –25 –20 –15 –10 –5 P (dBm) IN Figure 9. V and Log Conformance vs. Input Amplitude at 900 MHz, OUT Multiple Devices, ...

Page 9

START FREQUENCY = 0.05GHz STOP FREQUENCY = 10GHz 5800MHz 10000MHz Figure 15. Input Impedance vs. Frequency; No Termination Resistor on INHI (Impedance De-Embedded to Input Pins ...

Page 10

AD8317 THEORY OF OPERATION The AD8317 is a 6-stage demodulating logarithmic amplifier, specifically designed for use in RF measurement and power control applications at frequencies GHz. A block diagram is shown in Figure 21. Sharing much of ...

Page 11

USING THE AD8317 BASIC CONNECTIONS The AD8317 is specified for operation GHz result, low impedance supply pins with adequate isolation between functions are essential. A power supply voltage of between 3.0 V and 5.5 V ...

Page 12

AD8317 The slope is given by −I × 2x × 1.5 kΩ = −22 mV/dB × For example resistor divider to ground is used to generate a V voltage The ...

Page 13

For example, P for a sinusoidal input signal expressed in INTERCEPT terms of dBm (decibels referred Ω system is P [dBm] = INTERCEPT P [dBV] − 10 × log (Z × 1 mW/1 V ...

Page 14

AD8317 RF INPUT SIGNAL DAC 1nF Figure 30. AD8317 Operating in Controller Mode to Provide Automatic Gain Control Functionality in Combination with the ADL5330 Figure 31 shows the transfer function of the output power vs. the setpoint voltage over temperature ...

Page 15

Figure 33 shows the response of the AGC RF output to a pulse on VSET decreases from 1 0.4 V, the AGC loop SET responds with an RF burst. In this configuration, the input signal to ...

Page 16

AD8317 EVALUATION BOARD Table 5. Evaluation Board (Rev. A) Configuration Options Component Function VPOS, GND Supply and Ground Connections. R1, C1, C2 Input Interface. The 52.3 Ω resistor in Position R1 combines with the internal input impedance of the AD8317 ...

Page 17

Figure 37. Component Side Layout Figure 38. Component Side Silkscreen Rev Page AD8317 ...

Page 18

AD8317 DIE INFORMATION Table 6. Die Pad Function Descriptions Pin No. Mnemonic Description 1 INHI RF Input. Nominal input range of −50 dBm to 0 dBm, re: 50 Ω; ac-coupled RF input COMM Device Common. Connect both pads ...

Page 19

... PIN 1 INDICATOR 12° MAX 1.00 0.85 0.80 SEATING PLANE ORDERING GUIDE Model Temperature Range 1 AD8317ACPZ-R7 −40°C to +85°C AD8317ACPZ-R2 1 −40°C to +85°C 1 AD8317ACPZ-WP −40°C to +85°C AD8317ACHIPS −40°C to +85°C 1 AD8317-EVALZ RoHS Compliant Part. 3.25 3 ...

Page 20

AD8317 NOTES ©2005–2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05541-0-3/08(B) Rev Page ...

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