ncy9100 ON Semiconductor, ncy9100 Datasheet - Page 9

• Manufacturer Part Number: ncy9100
• Description: Compandor
• Manufacturer: ON Semiconductor

The maximum output level before clipping occurs in the
gain cell is plotted along with the output noise in a 20 kHz
bandwidth. Note that the noise drops as the gain is reduced
for the first 20 dB of gain reduction. At high gains, the signal
to noise ratio is 90 dB, and the total dynamic range from
maximum signal to minimum noise is 110 dB.
imperfect device matching and mismatches in the current
sources, I
I
effective in nulling out any control signal feedthrough, but
in general, the null for minimum feedthrough will be
different than the null in distortion. The control signal
feedthrough can be trimmed independently of distortion by
tying a current source to the DG input pin. This effectively
trims I
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
G
ORDERING INFORMATION
Specifications Brochure, BRD8011/D.
NCY9100DWR2G
Figure 15 shows the noise performance of the DG cell.
Control signal feedthrough is generated in the gain cell by
will cause a small output signal. The distortion trim is
1
. Figure 16 shows such a trim network.
1
Device
−100
and I
+20
−20
−40
−60
−80
0
−40
Figure 15. Dynamic Range
2
. When no input signal is present, changing
110dB
VCA GAIN (0dB)
−20
SIGNAL LEVEL
MAXIMUM
0
SO−16 WB Package
20kHz BW
NOISE IN
Description
90dB
(Pb−Free)
http://onsemi.com
9
Operation Amplifier
equivalent to a 741 with a 1.0 MHz bandwidth. Figure 17
shows the basic circuit. Split collectors are used in the input
pair to reduce g
just 10 pF may be used. The output stage, although capable
of output currents in excess of 20 mA, is biased for a low
quiescent current to conserve power. When driving heavy
loads, this leads to a small amount of crossover distortion.
The main op amp shown in the chip block diagram is
−IN
Figure 17. Operational Amplifier
Figure 16. Control Signal Feedthrough
Temperature Range
Q
−40 to +85°C
100kW
3
Q
M
1
, so that a small compensation capacitor of
V
CC
I
Q
R−SELECT FOR
1
Q
2
4
3.6V
470kW
+IN
C
C
Q
D
D
2
I
2
1
2
TO PIN 3 OR 14
1000 / Tape & Reel
Q
6
Shipping
OUT
†