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RDA5815 PDF – Fully Integrated Satellite Receiver

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Part Number: RDA5815

Function: Fully Integrated Satellite receiver

Package: QFN 5×5 mm, 32 Pin Type

Manufacturer: RDA Microelectronics

Images:

RDA5815 datasheet pdf

Description

The RDA5815 is a fully integrated direct conversion RF front end for DVB-S, DVB-S2&ABS-S, MMDS digital satellite Reception standard CMOS process. The receiving frequency range is from 250MHz to 2300MHz, and the baseband filter’s bandwidth can be selected from 4MHz to 40MHz with 1MHz step.

The rda5815 consists of a variable gain LNA, quadrature downconverter, variable IF gain amplifiers, variable low-pass filters, reference oscillator, VCOs, synthesizer and output baseband amplifier to drive external ADC.

3 page
RDA5815 pinout

The loop lna is used to generate the loopout signal.An on chip variable gain LNA is used to provide wide tuner dynamic range. A direct conversion architecture is used to convert the RF signal to in-phase and quadrature baseband signals. The signals required for direct conversion are all generated within the chip by a fully integrated PLL and a quadrature LO generator.

 

Features

1. Single-chip RF-to-baseband Satellite receiver

2. CMOS Fully integrated RF front end

3. Low noise and wide dynamic range zero-IF receiver

4. Input frequency range: 250 to 2300 MHz

5. Input signal level: -100 to 5 dBm

6. More than 85dB gain control range

 

Applications:

1. Set-top boxes

2. Digital video recorders

3. Digital television

4. Satellite PC-TV

RDA5815 PDF Datasheet

RDA5815 pdf

3TK2804 PDF Datasheet – Contactor Safety Combination

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Part Number: 3TK2804

Function: Contactor Safety Combination

Package: Module type

Manufacturer: Siemens

Images:

2 page
siemens 3TK2804 datasheet

Description

The 3TK2804 is contactor. This is an electrical switching device used to control and switch electrical power circuits. It is typically used in applications where a high current load needs to be controlled by a lower current control signal. Contactors are commonly found in industrial and commercial electrical systems and play a crucial role in the operation of various machinery and equipment.

1. Capacity and Switching Capability:

(1) Contactors: Primarily used in high-power applications. Contactors are suitable for switching and controlling high current and voltage circuits, such as large motors, pumps, and compressors.

(2) Relays: Mainly used in low-power and medium-voltage applications. Relays are suitable for switching and controlling small current and voltage levels, isolating signal interference, or detecting control signals.

2. Size and Form Factor:

(1) Contactors: Larger in size and typically installed on DIN rails or within electrical panels.

(2) Relays: Available in various sizes and shapes, ranging from small to large form factors.

3. Types and Applications:

(1) Contactors: Mainly used in industrial and commercial settings to control power to large machinery and equipment.

(2) Relays: Primarily used in control systems and automation applications for signal processing, detection, and control.

The internal control circuit of the contactor safety combination is designed according to DIN EN 60204, Part 1 (VDE 0113, Part 1), para. 9.4.2.2, so that in the case of a fault in one of the contactor relays the function of the safety circuit is maintained. The supply voltage must meet the requirements of the DIN EN 60204 (VDE 0113, Part 1) (the terminals “L-/N; A2“ must be connected to that side of the control current circuit which is linked to the protective conductor system).The contacts of the contactor relays are checked for proper opening and closing in every ON and OFF cycle of the machine to be switched.

This is, for instance, done by

– connecting and disconnecting the control voltage with the main switch,

– activating and deactivating the EMERGENCY-OFF unit

– opening and closing of the protective screen.

The contactor safety combinations can be used in EMERGENCY-OFF circuits and for monitoring protective devices (e.g. protective screens).

 

3 page
3TK2804 pdf manual

Applications:

1. The contactor safety combinations can be used in EMERGENCY-OFF circuits and for monitoring protective devices (e.g. protective screens).

Other data sheets are available within the file: 3TK2803, 3TK2907

3TK2804 PDF Datasheet

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