công cụ tìm kiếm bảng dữ liệu linh kiện điện tử
  Vietnamese  ▼
ALLDATASHEET.VN

X  

AD608AR-REEL bảng dữ liệu(PDF) 11 Page - Analog Devices

tên linh kiện AD608AR-REEL
Giải thích chi tiết về linh kiện  Low Power Mixer/Limiter/RSSI 3 V Receiver IF Subsystem
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  AD [Analog Devices]
Trang chủ  http://www.analog.com
Logo AD - Analog Devices

AD608AR-REEL bảng dữ liệu(HTML) 11 Page - Analog Devices

Back Button AD608AR-REEL Datasheet HTML 7Page - Analog Devices AD608AR-REEL Datasheet HTML 8Page - Analog Devices AD608AR-REEL Datasheet HTML 9Page - Analog Devices AD608AR-REEL Datasheet HTML 10Page - Analog Devices AD608AR-REEL Datasheet HTML 11Page - Analog Devices AD608AR-REEL Datasheet HTML 12Page - Analog Devices AD608AR-REEL Datasheet HTML 13Page - Analog Devices AD608AR-REEL Datasheet HTML 14Page - Analog Devices AD608AR-REEL Datasheet HTML 15Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 16 page
background image
AD608
Rev. C | Page 11 of 16
RSSI OUTPUT
The logarithmic amplifier uses a successive-detection architecture.
Each of the five stages has a full-wave detector; two additional
high level detectors are driven by attenuators at the input to the
limiting amplifiers, for a total of seven detector stages. Because
each detector is a full-wave rectifier, the ripple component in
the resulting dc is at twice the IF. The AD608 low-pass filter has
a 2 MHz cutoff frequency, which is one decade below the 21.4 MHz
ripple that results from a 10.7 MHz IF.
For operation at lower IFs, such as 450 kHz or 455 kHz, the
AD608 requires an external low-pass filter with a single pole
located at 90 kHz, a decade below the 900 kHz ripple frequency
for these IFs. The RSSI range is from the noise level at approx-
imately −80 dBm to overload at +15 dBm and is specified for
±1 dB accuracy from −75 dBm to +5 dBm. The +15 dBm
maximum IF input is provided to accommodate band-pass
filters of lower insertion loss than the nominal 4 dB for
10.7 MHz ceramic filters.
DIGITIZING THE RSSI
In typical cellular radio applications, the RSSI output of the
AD608 is digitized by an analog-to-digital converter (ADC).
The RSSI output of the AD608 is proportional to the power
supply voltage, which not only allows the ADC to use the
supply as a reference, but also causes the RSSI output and the
ADC output to track over power supply variations, reducing
system errors and component costs.
POWER CONSUMPTION
The total power supply current of the AD608 is a nominal
7.3 mA. The power is signal dependent, partly because the RSSI
output increases (the current is increased by 200 μA at an RSSI
output of +1.8 V), but mostly due to the IF consumption of the
band-pass filter when driven to ±891 mV, assuming a 4 dB loss
in this filter and a peak input of +5 dBm to the log-IF amp. In
addition, the power is temperature dependent because the
biasing system used in the AD608 is proportional to the
absolute temperature (PTAT).
TROUBLESHOOTING
The most common causes of problems with the AD608 are
incorrect component values for the offset feedback loop, poor
board layout, and pickup of radio frequency interference (RFI),
which all cause the AD608 to lose the low end (typically below
−65 dBm) of its RSSI output and cause the limiter to swing
randomly. Both poor board layout and incorrect component
values in the offset feedback loop can cause low level oscillations.
Pickup of RFI can be caused by improper layout and shielding
of the circuit.


Số phần tương tự - AD608AR-REEL

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
Analog Devices
AD608AR AD-AD608AR Datasheet
196Kb / 12P
   Low Power Mixer/Limiter/RSSI 3 V Receiver IF Subsystem
REV. B
More results

Mô tả tương tự - AD608AR-REEL

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
Analog Devices
AD608 AD-AD608 Datasheet
196Kb / 12P
   Low Power Mixer/Limiter/RSSI 3 V Receiver IF Subsystem
REV. B
AD608 AD-AD608_15 Datasheet
326Kb / 16P
   Low Power Mixer/Limiter/RSSI 3 V Receiver IF Subsystem
REV. C
AD607 AD-AD607 Datasheet
510Kb / 24P
   Low Power Mixer/AGC/RSSI 3 V Receiver IF Subsystem
REV. 0
AD61009 AD-AD61009_15 Datasheet
262Kb / 24P
   Low Power Mixer 3 V Receiver IF Subsystem
REV. 0
AD607ARSZ AD-AD607ARSZ Datasheet
1Mb / 24P
   Low Power Mixer 3 V Receiver IF Subsystem
REV. C
AD607 AD-AD607_15 Datasheet
1Mb / 24P
   Low Power Mixer 3 V Receiver IF Subsystem
REV. C
AD61009 AD-AD61009 Datasheet
261Kb / 24P
   Low Power Mixer 3 V Receiver IF Subsystem
REV. 0
AD6459 AD-AD6459 Datasheet
314Kb / 12P
   GSM 3 V Receiver IF Subsystem
REV. 0
AD6458 AD-AD6458 Datasheet
268Kb / 12P
   GSM 3 V Receiver IF Subsystem
REV. 0
logo
Maxim Integrated Produc...
MAX2511 MAXIM-MAX2511_97 Datasheet
126Kb / 16P
   Low-Voltage IF Transceiver with Limiter and RSSI
Rev 0; 10/97
More results


Html Pages

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


bảng dữ liệu tải về

Go To PDF Page


Link URL




Chính sách bảo mật
ALLDATASHEET.VN
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không?  [ DONATE ] 

Alldatasheet là   |   Quảng cáo   |   Liên lạc với chúng tôi   |   Chính sách bảo mật   |   Trao đổi link   |   Tìm kiếm theo nhà sản xuất
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