STV-5410-R01 STMICROELECTRONICS [STMicroelectronics], STV-5410-R01 Datasheet - Page 89

• 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
11.1.4 Audio Amplifier Bandwidth
The audio circuit can be bandwidth limited to a first order, through the use of minimum external circuitry. The two outputs, AoutP
and AoutN, require compensation capacitors that may also be used to define the bandwidth of the circuit.
In addition, the inclusion of a resistor (microphone biasing) and decoupling capacitor at the input allows a first order high pass
filter to be realised. This can easily be designed to remove frequencies below 50Hz/60Hz (mains electricity noise).
11.2 Voltage Regulators
VV5410/VV6410 contains three on-chip voltage regulators, two of which are capable of being powered-down via the serial
interface. The third regulator, controlling the band gap references is never powered down. The band gap circuitry is extremely low
power consuming only 30 A.
11.2.1 Regulator for Digital System
The output of the regulator, Reg3V3, powers the digital logic and can power an external co-processor. The regulator is powered
up by default. The regulator has its own discrete power supply and can source a load of 300 A -> 150mA and will regulate to
3.0V 10% from an input range of 4-6V. When VV5410/VV6410 is in the USB compatible suspend mode, the clocks to the digital
logic are removed to limit power consumption to approximately 80 A. If an external 3.3V supply is available, this regulator may
be overdriven by an external 3.3V supply to directly power the logic. This voltage regulator is never powered down.
11.2.2 Regulator for Audio Amplifier
The output of the regulator for the audio amplifier, Aud3V3, drives the load resistor for the microphone and the audio pre-
amplifier. As this regulator is capable of being powered-down via the serial interface, all control signals from the digital logic are
low during low power/standby. This regulator will be powered up by default.
11.2.3 Regulator for Video Supply/Analogue Core
The output of the regulator for the video supply,Vid3V3, powers the analog core. This regulator is capable of being powered-
down via the serial interface but will be powered up by default. Note that the sensor will be in low power mode initially and
therefore
11.3 Valid Supply Voltage Configurations
The power supplies to the VV5410 and VV6410 sensors can be configured such that the sensor will operate in a number of
systems:
The next 2figures will detail the options described above:
•
•
2. Minimum dynamic range includes dcout (i.e. Vclip- OUT_DC is greater than Vppmin/2)
3. Assumes 10 F bypass capacitors on all supplies and well separated supplies and grounds
1. Each audio output must have a capacitor (Ccomp) connected to ground to avoid any oscillation
USB system (sensor will regulate the nominal 5V supply to 3V3 internally) with optional BJT to provide power for a companion
chip.
Direct drive the sensor with 3V3 (internal voltage regulators will be powered down in this mode).
Compensation Capacitor (nF)
1
10
100
Table 62 : Compensation capacitor values
1
Commercial in confidence
cd5410-6410f-3-0.fm
3dB Bandwidth
175
41
4.2
Units
kHz
kHz
kHz
VV5410 & VV6410
89/105