AD8317-EVALZ Analog Devices Inc, AD8317-EVALZ Datasheet

no-image

AD8317-EVALZ

Manufacturer Part Number
AD8317-EVALZ
Description
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD8317-EVALZ

Lead Free Status / Rohs Status
Compliant
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

AD8317-EVALZ Summary of contents

Page 1

... 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 × 3 mm, 8-lead LFCSP with an operating temperature range of −40°C to +85°C. ...

Page 2

... General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 5 ESD Caution .................................................................................. 5 Pin Configuration and Function Descriptions ............................. 6 Typical Performance Characteristics ............................................. 7 Theory of Operation ...................................................................... 10 Using the AD8317 .......................................................................... 11 Basic Connections ...................................................................... 11 REVISION HISTORY 3/08—Rev Rev. B Changes to Features .......................................................................... 1 Changes to General Description .................................................... 1 Changes to Measurement Mode Section ..................................... 12 Changes to Equation 12 ................................................................. 15 8/07— ...

Page 3

... −40 dBm kΩ TADJ T = 25°C A −40°C < T < +85°C A ±1 dB error ±1 dB error P = −10 dBm −40 dBm IN Rev Page AD8317 Min Typ Max Unit 0.001 10 GHz V − 0.6 V POS 1500||0.33 Ω|| −3 dBm −53 dBm −25 − ...

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 Dynamic Range Maximum Input Level Minimum Input Level 2 Slope 2 Intercept Output Voltage, High Power In ...

Page 5

... POS section of this specification is not implied. Exposure to absolute 12 dBm maximum rating conditions for extended periods may affect 0.73 W device reliability. 55°C/W 125°C −40°C to +85°C ESD CAUTION −65°C to +150°C 260°C Rev Page AD8317 ...

Page 6

... VPOS Positive Supply Voltage INLO RF Common for INHI. AC-coupled RF common. Paddle Internally connected to COMM; solder to a low impedance ground plane. INHI 1 8 INLO AD8317 COMM 2 7 VPOS TOP VIEW CLPF 3 6 TADJ (Not to Scale) VSET 4 5 VOUT Figure 2 ...

Page 7

... R = 500 Ω TADJ 0 –60 –55 –50 –45 –40 –35 –30 –25 –20 –15 –10 –5 P (dBm) IN and Log Conformance vs. Input Amplitude at 8.0 GHz, OUT = Open, Error Calculated from P = −34 dBm AD8317 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2 2.0 1.5 1 ...

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 kΩ TADJ 2.00 1.75 1.50 1.25 1.00 ...

Page 9

... Figure 18. Noise Spectral Density of Output; C 1000 100 10 1k 10k 100k 1M FREQUENCY (Hz 0.1 μF LPF 3.3V 3.0V 3.6V –55 –45 –35 –25 –15 –5 P (dBm) IN When V Varies by 10% POS AD8317 –10dBm 10M = Open LPF 10M 2.0 1.5 1.0 0.5 0 –0.5 –1.0 –1.5 –2 ...

Page 10

... Additional enhancements over the AD8318, such as a reduced RF burst response time ns supply current, and board space requirements of only 2 mm × 3 mm, add to the low cost and high performance benefits of the AD8317. VPOS TADJ GAIN ...

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 should be applied to VPOS. Power supply decoupling capacitors of 100 pF and 0.1 μF should be connected close to this power supply pin ...

Page 12

... Open MEASUREMENT MODE When the V voltage or a portion of the V OUT back to the VSET pin, the device operates in measurement mode. As seen in Figure 27, the AD8317 has an offset voltage, a negative slope, and a V measurement intercept at the high OUT end of its input signal range. 2.00 1 ...

Page 13

... VGA, increases V of the VGA must have a positive sense. A positive control voltage to the VGA increases the gain of the device. The basic connections for operating the AD8317 in an auto- matic gain control (AGC) loop with the Figure 30. The ADL5330 MHz to 3 GHz VGA. It offers a large gain control range with ± ...

Page 14

... 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 for a 900 MHz sine wave with an input power of −1.5 dBm. Note that the power control of the AD8317 has a negative sense ...

Page 15

... An example of a 4-pole active filter is shown in the OPERATION BEYOND 8 GHz The AD8317 is specified for operation GHz, but it provides useful measurement accuracy over a reduced dynamic range GHz. Figure 35 shows the performance of the AD8317 over temperature at 10 GHz when the device is configured as shown in Figure 22 ...

Page 16

... AD8317 RF input. A sample of the RF output signal from this variable gain component is selected, typically via a directional coupler, and applied to the AD8317 RF input. The voltage at the VOUT pin is applied to the gain control of the variable gain element. A control voltage is applied to the VSET pin. The ...

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 to a low impedance ground plane. 3 CLPF Loop Filter Capacitor. In measurement mode, this capacitor sets the pulse response time and video bandwidth ...

Page 19

... 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 3.00 0.55 2.75 0.40 0.30 2.25 2.00 TOP VIEW 0.60 1.75 0.45 ...

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 ...