Electronic Components Datasheet Search
  New Zealand  ▼
ALLDATASHEET.CO.NZ

X  

Preview PDF HTML

ADL5303ACPZ-R7 Datasheet(PDF) 14 Page - Analog Devices

Part # ADL5303ACPZ-R7
Description  160 dB Range 100 pA to 10 mA Low Cost Logarithmic Converter
PDF  24 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADL5303ACPZ-R7 Datasheet(HTML) 14 Page - Analog Devices

Back Button ADL5303ACPZ-R7 Datasheet HTML 10Page - Analog Devices ADL5303ACPZ-R7 Datasheet HTML 11Page - Analog Devices ADL5303ACPZ-R7 Datasheet HTML 12Page - Analog Devices ADL5303ACPZ-R7 Datasheet HTML 13Page - Analog Devices ADL5303ACPZ-R7 Datasheet HTML 14Page - Analog Devices ADL5303ACPZ-R7 Datasheet HTML 15Page - Analog Devices ADL5303ACPZ-R7 Datasheet HTML 16Page - Analog Devices ADL5303ACPZ-R7 Datasheet HTML 17Page - Analog Devices ADL5303ACPZ-R7 Datasheet HTML 18Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 14 / 24 page
background image
ADL5303
Data Sheet
Rev. 0 | Page 14 of 24
Generally, it is useful to raise the intercept. Keep in mind that
this moves the VLOG line in Figure 26 to the right, lowering all
output values. Figure 27 shows how raising the intercept is
achieved. The feedback resistors, RA and RB, around the buffer
are now augmented with a third resistor, RZ, placed between the
BFNG and VREF pins. Adding a third resistor raises the zero-
signal voltage on BFNG, which has the effect of pushing VOUT
lower. Note that the addition of the RZ resistor also alters the
feedback ratio. However, this change in feedback ratio is readily
compensated in the design of the network. Table 6 lists the
resistor values for representative intercepts.
Table 6. Examples of Raising the Intercept
VY (mV/decade)
IZ (nA)
RA (kΩ)
RB (kΩ)
RC (kΩ)
300
10
7.5
37.4
24.9
300
100
8.25
130
18.2
400
10
10
16.5
25.5
400
100
9.76
25.5
16.2
400
500
9.76
36.5
13.3
500
10
12.4
12.4
24.9
500
100
12.4
16.5
16.5
500
500
11.5
20.0
12.4
Use the following equation with Table 6:
+
×
=


×
=
C
B
A
B
A
REF
Z
PD
Y
OUT
R
R
R
R
R
V
I
I
V
G
V
10
log
(10)
where
.
and
1
B
A
B
A
B
A
C
B
A
R
R
R
R
R
R
R
R
R
G
×
×
=
+
=
NC
VOUT
500mV/DEC
R15
(RA)
R18
(RB)
NC = NO CONNECT
VP
100nF
R1
750
C1
1nF
IPD
C3
PDB
BIAS
VREF
VPDB
VSUM
INPT
VSUM
ACOM
VPS2
PWDN
VPS1
VREF
VLOG
BFIN
BFNG
VOUT
0.5V
ADL5303
~10k
Ω
5k
Ω
5
2
3
4
15
14
GND
GND
7
11
10
16
12
6
8
9
13
TEMPERATURE
COMPENSATION
R13
(RC)
Figure 27. Method for Raising the Intercept



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
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