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F1952 Datasheet(PDF) 10 Page - Renesas Technology Corp

Part # F1952
Description  6-bit 0.5dB Digital Step Attenuator 100MHz to 5000MHz
PDF  21 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

F1952 Datasheet(HTML) 10 Page - Renesas Technology Corp

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© 2021 Renesas Electronics Corporation
10
Sep 28, 2021
TOCS CONTINUED (-5-) [fRF = 900 MHz]
Transient [ 15.5 to 16.0 (MSB+) 3.3V F1951 ]
The graphs ABOVE show the transient overshoot and
settling time performance for both the MSB+ and MSB-
cases for the F1951. The device settles very quickly
(~400 ns) with benign (~0.5 dB) overshoot.
Transient [ 15.75 to 16.00 (MSB+) Standard DSA ]
Transient [ 16.0 to 15.5 (MSB-) 5.0V F1951 ]
The graphs BELOW show the transient overshoot and
settling time performance for a popular competing
DSA.
Note the overshoot/undershoot excursion of
almost 10 dB and the very long settling time. For the
MSB- case, the settling time is off the scale, ~ 3 µs.
Transient [ 16.00 to 15.75 (MSB-) Standard DSA ]
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
-20.0
-19.0
-18.0
-17.0
-16.0
-15.0
-14.0
-13.0
-12.0
-11.0
-10.0
-100
0
100
200
300
400
500
600
700
Time (nsec)
Glitch ~ 0.5 dB
Pwr (dBm)
Trigger
Settling Time = 400 nsec (+/- 0.1 dB)
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
-15.20
-14.20
-13.20
-12.20
-11.20
-10.20
-9.20
-8.20
-7.20
-6.20
-5.20
-100
0
100
200
300
400
500
600
700
Time (nsec)
Pwr (dBm)
Trigger
Settling Time = 600nsec (+/- 0.1 dB)
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
-20.0
-19.0
-18.0
-17.0
-16.0
-15.0
-14.0
-13.0
-12.0
-11.0
-10.0
-100
0
100
200
300
400
500
600
700
Time (nsec)
Glitch ~ 0.5 dB
Pwr (dBm)
Trigger
Settling Time = 390 nsec (+/- 0.1 dB)
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
-13.57
-12.57
-11.57
-10.57
-9.57
-8.57
-7.57
-6.57
-5.57
-4.57
-3.57
-100
0
100
200
300
400
500
600
700
Time (nsec)
Pwr (dBm)
Trigger
Settling Time >> 1 usec



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