HEF4521B View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
Manufacturer
HEF4521B Datasheet PDF : 18 Pages
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NXP Semiconductors
HEF4521B
24-stage frequency divider and oscillator
Rbias
560 kΩ
VDD
0.47 μF
Vi
(f = 1 kHz)
A2
input
Y2 100 μF
output
A io
VSS
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gfs = dio/dvi with vo constant (see Figure 11).
Fig 10. Test setup for measuring forward
transconductance
75
gain
(VO/VI)
50
001aae716
typ
25
12.5
gfs
(mA/V)
10
7.5
5
001aae658
(1)
(2)
(3)
2.5
0
0
5
10
15
VDD (V)
(1) Average + 2s.
(2) Average.
(3) Average 2s.
Where ‘s’ is the observed standard deviation.
Fig 11. Typical forward transconductance gfs as a
function of the supply voltage at Tamb = 25 C
20
IDD
(mA)
15
10
001aae717
typ
5
0
0
5
10
15
VDD (V)
Fig 12. Voltage gain VO/VI as a function of supply
voltage
0
0
5
10
15
VDD (V)
Fig 13. Supply current as a function of supply voltage
330 kΩ
A2
Y2
001aae718
Fig 14. Test setup for measuring the Figure 12 and Figure 13 graphs
HEF4521B
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 21 November 2011
© NXP B.V. 2011. All rights reserved.
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