Motore di ricerca datesheet componenti elettronici
  Italian  ▼
ALLDATASHEETIT.COM

X  

AD8319ACPZ-R2 Scheda tecnica(PDF) 10 Page - Analog Devices

Il numero della parte AD8319ACPZ-R2
Spiegazioni elettronici  1 MHz to 10 GHz, 40 dB Log Detector/Controller
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD8319ACPZ-R2 Scheda tecnica(HTML) 10 Page - Analog Devices

Back Button AD8319ACPZ-R2 Datasheet HTML 6Page - Analog Devices AD8319ACPZ-R2 Datasheet HTML 7Page - Analog Devices AD8319ACPZ-R2 Datasheet HTML 8Page - Analog Devices AD8319ACPZ-R2 Datasheet HTML 9Page - Analog Devices AD8319ACPZ-R2 Datasheet HTML 10Page - Analog Devices AD8319ACPZ-R2 Datasheet HTML 11Page - Analog Devices AD8319ACPZ-R2 Datasheet HTML 12Page - Analog Devices AD8319ACPZ-R2 Datasheet HTML 13Page - Analog Devices AD8319ACPZ-R2 Datasheet HTML 14Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 20 page
background image
AD8319
Rev. A | Page 10 of 20
THEORY OF OPERATION
The AD8319 is a 5-stage demodulating logarithmic amplifier,
specifically designed for use in RF measurement and power
control applications at frequencies up to 10 GHz. A block
diagram is shown in Figure 21. Sharing much of its design with
the AD8318 logarithmic detector/controller, the AD8319
maintains tight intercept variability vs. temperature over a
40 dB range. Additional enhancements over the AD8318, such
as reduced RF burst response time of 8 ns to 10 ns, 22 mA
supply current, and board space requirements of only 2 mm ×
3 mm add to the low cost and high performance benefits found
in the AD8319.
GAIN
BIAS
SLOPE
DET
DET
DET
DET
INHI
INLO
IV
VOUT
VSET
CLPF
TADJ
VPSO
COMM
IV
Figure 21. Block Diagram
A fully differential design, using a proprietary, high speed
SiGe process, extends high frequency performance. Input INHI
receives the signal with a low frequency impedance of nominally
500 Ω in parallel with 0.7 pF. The maximum input with ±1 dB
log conformance error is typically 0 dBm (re: 50 Ω). The noise
spectral density referred to the input is 1.15 nV/√Hz, which is
equivalent to a voltage of 118 μV rms in a 10.5 GHz bandwidth
or a noise power of −66 dBm (re: 50 Ω). This noise spectral
density sets the lower limit of the dynamic range. However, the
low end accuracy of the AD8319 is enhanced by specially
shaping the demodulating transfer characteristic to partially
compensate for errors due to internal noise. The common pin,
COMM, provides a quality low impedance connection to the
printed circuit board (PCB) ground. The package paddle, which
is internally connected to the COMM pin, should also be
grounded to the PCB to reduce thermal impedance from the
die to the PCB.
The logarithmic function is approximated in a piecewise
fashion by five cascaded gain stages. (For a more comprehensive
explanation of the logarithm approximation, refer to the AD8307
data sheet.) The cells have a nominal voltage gain of 9 dB each
and a 3 dB bandwidth of 10.5 GHz. Using precision biasing, the
gain is stabilized over temperature and supply variations. The
overall dc gain is high due to the cascaded nature of the gain
stages. An offset compensation loop is included to correct for
offsets within the cascaded cells. At the output of each of the
gain stages, a square-law detector cell is used to rectify the signal.
The RF signal voltages are converted to a fluctuating differential
current having an average value that increases with signal level.
Along with the five gain stages and detector cells, an additional
detector is included at the input of the AD8319, providing a
40 dB dynamic range in total. After the detector currents are
summed and filtered, the following function is formed at the
summing node
ID × log10(VIN/VINTERCEPT)
(1)
where:
ID is the internally set detector current.
VIN is the input signal voltage.
VINTERCEPT is the intercept voltage (that is, when VIN = VINTERCEPT,
the output voltage would be 0 V, if it were capable of going to 0 V).


Codice articolo simile - AD8319ACPZ-R2

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
Analog Devices
AD8319ACPZ-R2 AD-AD8319ACPZ-R2 Datasheet
1Mb / 20P
   1 MHz to 10 GHz, 40 dB Log Detector/Controller
REV. 0
AD8319ACPZ-R2 AD-AD8319ACPZ-R2 Datasheet
1Mb / 19P
   1 MHz to 10 GHz, 45 dB Log Detector/Controller
More results

Descrizione simile - AD8319ACPZ-R2

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
Analog Devices
AD8319 AD-AD8319 Datasheet
1Mb / 20P
   1 MHz to 10 GHz, 40 dB Log Detector/Controller
REV. 0
AD8317 AD-AD8317 Datasheet
1Mb / 20P
   1 MHz to 10 GHz, 50 dB Log Detector/Controller
REV. 0
AD8317 AD-AD8317_08 Datasheet
780Kb / 20P
   1 MHz to 10 GHz, 55 dB Log Detector/Controller
REV. B
AD8319 AD-AD8319_15 Datasheet
1,004Kb / 20P
   1 MHz to 10 GHz, 45 dB Log Detector/Controller
REV. C
AD8319 AD-AD8319_17 Datasheet
1Mb / 19P
   1 MHz to 10 GHz, 45 dB Log Detector/Controller
ADL5519 AD-ADL5519_17 Datasheet
3Mb / 39P
   1 MHz to 10 GHz, 62 dB Dual Log Detector/Controller
ADL5519 AD-ADL5519 Datasheet
654Kb / 27P
   1 MHz to 10 GHz, 50 dB Dual Log Detector/Controller
Rev. PrB
ADL5519 AD-ADL5519_08 Datasheet
3Mb / 40P
   1 MHz to 10 GHz, 62 dB Dual Log Detector/Controller
REV. 0
AD8318 AD-AD8318_07 Datasheet
1Mb / 24P
   1 MHz to 8 GHz, 70 dB Logarithmic Detector/Controller
REV. B
ADL5513 AD-ADL5513_08 Datasheet
1Mb / 28P
   1 MHz to 4 GHz, 80 dB Logarithmic Detector/Controller
REV. 0
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20


Scheda tecnica Scarica

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEETIT.COM
Lei ha avuto il aiuto da alldatasheet?  [ DONATE ] 

Di alldatasheet   |   Richest di pubblicita   |   contatti   |   Privacy Policy   |   scambio Link   |   Ricerca produttore
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com