STV0056A STMicroelectronics, STV0056A Datasheet - Page 14

• Manufacturer Part Number: STV0056A
• Description: Video ICs Analog Sound/Video
• Manufacturer: STMicroelectronics
• Type: Audio DSPr

Specifications of STV0056A

• Maximum Operating Temperature: + 70 C
• Package / Case: PDIP-56
• Minimum Operating Temperature: 0 C
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

STV0056A
PIN INTERNAL CIRCUITRY (continued)
VID IN
Figure 7
PK OUT R, PK OUT L
Figure 8
FC L, FC R
Ivar is controlled by the peak det audio level max.
Figure 9
VOL OUT R, VOL OUT L
Audio output with volume and scart driver with
+12dB of gain for up to 2V
push-pull output stage.
Figure 10
14/26
Audio
15 A (1V
2.4V Bias
Peak Detector
Audio
VID IN
PP
FC R
FC L
audio).
30k
15k
V
DD
1
Ivar
9V
V
10k
REF
6.5k
1
GND 0V
2.4V
30k
GND 0V
3.4V
5k
0.5pF
RMS
1
+
4.8V
. The opamp has a
Clamp
1
V
1
DD
85 A
9V
VOL OUT R
VOL OUT L
PK OUT R
PK OUT L
S2 OUT L, S2 OUT R, S3 OUT L, S3 OUT R
Same as above but with gain fixed at +6dB.
Figure 11
S2 RTN L, S2 RTN R, S3 RTN L, S3 RTN R
4.8V bias voltage is the same as the bias level on
the audio outputs.
Figure 12
FM IN
The other input for each channel is internally biased
in the same way via 10k
Figure 13
I
The optimum value if I
external resistor of 47.5k
Figure 14
REF
FM IN
2.4V Bias
S2 RTN R
S3 RTN R
S2 RTN L
S3 RTN L
Audio
2.4V
2.4V
Right Channel
20k
20k
4.8V
10k
10k
REF
GND 0V
25k
to the 2.4V V
1
1% is required.
is 50 A 2% so an
1
50 A
1
I
REF
S2 OUT L
S2 OUT R
S3 OUT L
S3 OUT R
Left Channel
50 A
1
50 A
REF
.