STV-5410-R01 STMICROELECTRONICS [STMicroelectronics], STV-5410-R01 Datasheet - Page 87

• Manufacturer Part Number: STV-5410-R01
• Description: Mono and Colour Digital Video CMOS Image Sensors
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

CMOS Sensor; Customer Datasheet, Rev 3.0, 28 September 2000
11. Other Features
11.1 Audio Amplifier
VV5410/VV6410 contains an on-chip audio amplifier which can be configured via the serial interface. The amplifier may also be
powered down via the serial interface.
The following document outlines the implementation of audio circuitry on the VV5410/VV6410 sensor.
11.1.1 Audio Amplifier Configuration
The audio circuit is controlled through a single eight bit register on the VV5410/VV6410. This includes bits for power down, output
select, first and second stage gains and current boosting. Table 59 describes the functionality of the control register bits.
The first stage provides a gain of 0dB or 30dB using a low noise amplifier design.
The reference is provided from the on-chip bandgap voltage. This is buffered by a cut down version of the low-noise amplifier
used in the first gain stage.
The output of the first gain stage is fed to two output amplifiers. These can be configured with a 1mA or 2mA output drive current.
The inverting gain stage provides an additional gain between 0dB and 18dB.
The output of the inverting gain stage may be routed through the other output buffer to provide two single ended outputs.
Otherwise, the inverted and non-inverted outputs provide a fully differential output signal.
Some more circuit specifications may be found in Table 60.
0
1
2
3
4
5
7:6
Bit
Table 59 : Control register summary for VV5410/VV6410 audio circuit.
First stage gain
Second stage gain[1]
Second stage gain[0]
Power Down
Output Select
Current Boost
Unused
Function
Commercial in confidence
cd5410-6410f-3-0.fm
1
0
0
0
0
0
Default
0 - 0dB
1 - 30dB
gain[1] gain[0] - gain(dB)
0 - Powered up
1 - Power down
0 - Single ended
1 - Differential
0 - 1mA output drive in output buffers
1 - 2mA output drive in output buffers
0 0 - 0dB
0 1 - 6dB
1 0 - 12dB
1 1 - 18dB
Comments
VV5410 & VV6410
87/105