PART AND COMPONENT

Using GT4123 & GT4123A Video Mixer ICs

noreply@blogger.com (Go2Media) — Wed, 21 Jan 2009 14:13:00 +0000

The GT4123 and GT4123A are two input video mixer ICs available to the professional video and multimedia markets. Each input signal is applied to a conventional differential amplifier (AMP A and AMP B). From the amplifiers, the signals are applied to analog multiplier circuits (XA and XB) whose outputs are the product of the input signals and internally generated controlling voltages VCA and VCB.

These voltages are derived from a unity gain differential amplifier (AMP C) whose outputs (true and invert) are the difference between an externally applied CONTROL voltage (VC) and an internal 0.5 volt reference voltage. In addition, the internal DC offset of 0.5 volts is applied to the controlling voltages.

There is a small ‘dead band’ at either extreme of the CONTROL input. The amount of ‘dead band’ is about 100 mV and is shown in Figure 2. The CONTROL input can be preceded by an operational amplifier so biased as to overcome this ‘dead band’ as well as level shift the control signal so that other than 0 to 1 volt ranges can be used. The bandwidth of the CONTROL input is sufficient to allow very fast keying and is in the order

Download GT4123 & GT4123A Video Mixer ICs Datasheets

DS18S20 High-Precision Digital Thermometer Datasheet

noreply@blogger.com (Go2Media) — Tue, 11 Nov 2008 04:43:00 +0000

The DS18S20 high-precision digital thermometer is a product of Dallas Semiconductor. It provides 9-bit Celsius temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18S20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. It has an operating temperature range of –55°C to +125°C and is accurate to ±0.5°C over the range of –10°C to +85°C. In addition, the DS18S20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply.

Each DS18S20 has a unique 64-bit serial code, which allows multiple DS18S20s to function on the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18S20s distributed over a large area. Applications that can benefit from this feature include HVAC environmental controls, temperature monitoring systems inside buildings, equipment, or machinery, and process monitoring and control systems.

Download DS18S20 High-Precision Digital Thermometer Datasheet

DS1820 Digital Thermometer Datasheet

noreply@blogger.com (Go2Media) — Tue, 11 Nov 2008 04:24:00 +0000

The DS1820 Digital Thermometer is a product of Dallas Semiconductor. It provides 9–bit temperature readings which indicate the temperature of the device.

Information is sent to/from the DS1820 over a 1–Wire interface, so that only one wire (and ground) needs to be connected from a central microprocessor to a DS1820. Power for reading, writing, and performing temperature conversions can be derived from the data line itself with no need for an external power source.

Because each DS1820 contains a unique silicon serial number, multiple DS1820s can exist on the same 1–Wire bus. This allows for placing temperature sensors in many different places. Applications where this feature is useful include HVAC environmental controls, sensing temperatures inside buildings, equipment or machinery, and in process monitoring and control.

Download DS1820 Digital Thermometer Datasheet

LM2005 20 Watt Automotive Power Amplifier

noreply@blogger.com (Go2Media) — Sat, 12 Jul 2008 10:24:00 +0000

The LM2005 can withstand a constant 28 VDC on the supply with no damage (maximum operating voltage is 18V). The device is also protected from load dump or dangerous transients up to 40V for 50 ms (every 1000 ms) on the supply with no damage.

Download LM2005 20 Watt Automotive Power Amplifier Datasheet

LM3915 Dot/Bar Display Driver

noreply@blogger.com (Go2Media) — Mon, 07 Jul 2008 18:41:00 +0000

The LM3915 is a monolithic integrated circuit that senses analog voltage levels and drives ten LEDs, LCDs or vacuum fluorescent displays, providing a logarithmic 3 dB/step analog display. One pin changes the display from a bar graph to a moving dot display. LED current drive is regulated and programmable, eliminating the need for current limiting resistors. The whole display system can operate from a single supply as low as 3V or as high as 25V.

The IC contains an adjustable voltage reference and an accurate ten-step voltage divider. The high-impedance input buffer accepts signals down to ground and up to within 1.5V of the positive supply. Further, it needs no protection against inputs of ±35V. The input buffer drives 10 individual comparators referenced to the precision divider. Accuracy is typically better than 1 dB.

The LM3915’s 3 dB/step display is suited for signals with wide dynamic range, such as audio level, power, light intensity or vibration. Audio applications include average or peak level indicators, power meters and RF signal strength meters. Replacing conventional meters with an LED bar graph results in a faster responding, more rugged display with high visibility that retains the ease of interpretation of an analog display.

Download LM3915 Dot/Bar Display Driver Datasheet

Proximity Detector CS209A

noreply@blogger.com (Go2Media) — Mon, 07 Jul 2008 15:08:00 +0000

The CS209A is a bipolar monolithic integrated circuit for use in metal detection/ proximity sensing applications. The IC (see block diagram) contains two on-chip current regulators, oscillator and low-level feedback circuitry, peak detection/ demodulation circuit, a comparator and two complementary output stages.

The oscillator, along with an external LC network, provides controlled oscillations where amplitude is highly dependent on the Q of the LC tank. During low Q conditions, a variable low-level feedback circuit provides drive to maintain oscillation. The peak demodulator senses the negative portion of the oscillator envelop and provides a demodulated waveform as input to the comparator. The comparator sets the states of the complementary outputs by comparing the input from the demodulator to an internal reference. External loads are required for the output pins.

A transient suppression circuit is included to absorb negative transients at the tank circuit terminal.

Download Proximity Detector CS209A Datasheet

Complementary Silicon High-Power Transistors NPN 2N3055A MJ15015* PNP MJ2955A MJ15016*

noreply@blogger.com (Go2Media) — Mon, 07 Jul 2008 10:53:00 +0000

PowerBase complementary transistors designed for high power audio, stepping motor and other linear applications. These devices can also be used in power switching circuits such as relay or solenoid drivers, dc–to–dc converters, inverters, or for inductive loads requiring higher safe operating area than the 2N3055 and MJ2955.

15 AMPERE COMPLEMENTARY SILICON POWER TRANSISTORS 60, 120 VOLTS 115, 180 WATTS

Download Complementary Silicon High-Power Transistors Datasheets
NPN 2N3055A MJ15015* PNP MJ2955A MJ15016*

High Precision Voltage Regulator LM723

noreply@blogger.com (Go2Media) — Mon, 07 Jul 2008 10:48:00 +0000

The LM723 is a monolithic integrated programmable voltage regulator, assembled in 14-lead dual in-line plastic and SO-14 micro package. The circuit provides internal current limiting. When the output current exceeds 150mA an external NPN or PNP pass element may be used. Provisions are made for adjustable current limiting and remote shut-down.

Download High Precision Voltage Regulator LM723 Datasheet

4.5MHz, BiMOS Operational Amplifier with MOSFET Input/Bipolar Output - CA3140(A)

noreply@blogger.com (Go2Media) — Mon, 07 Jul 2008 10:16:00 +0000

The CA3140A and CA3140 are integrated circuit operational amplifiers that combine the advantages of high voltage PMOS transistors with high voltage bipolar transistors on a single monolithic chip.

The CA3140A and CA3140 BiMOS operational amplifiers feature gate protected MOSFET (PMOS) transistors in the input circuit to provide very high input impedance, very low input current, and high speed performance. The CA3140A and CA3140 operate at supply voltage from 4V to 36V (either single or dual supply). These operational amplifiers are internally phase compensated to achieve stable operation in unity gain follower operation, and additionally, have access terminal for a supplementary external capacitor if additional frequency roll-off is desired. Terminals are also provided for use in applications requiring input offset voltage nulling. The use of PMOS field effect transistors in the input stage results in common mode input voltage capability down to 0.5V below the negative supply terminal, an important attribute for single
supply applications. The output stage uses bipolar transistors and includes built-in protection against damage from load terminal short circuiting to either supply rail or to ground.

Download 4.5MHz, BiMOS Operational Amplifier with MOSFET Input/Bipolar Output

3½ Digit LCD Module DPM 200

noreply@blogger.com (Go2Media) — Sun, 06 Jul 2008 01:36:00 +0000

The DPM 200 uses advanced components and construction techniques to provide an unrivalled combination of high performance, elegant appearance and low cost. The module uses a bandgap reference for extra temperature stability. For single rail use, theDPM200S features a built in negative rail generator, enabling the meter to measure a signal referenced to its own power supply 0V.

Download DPM 200 3½ Digit LCD Module Datasheet

Video Sync Separator LM1881

noreply@blogger.com (Go2Media) — Thu, 03 Jul 2008 16:39:00 +0000

The LM1881 Video sync separator extracts timing information including composite and vertical sync, burst/back porch timing, and odd/even field information from standard negative going sync NTSC, PAL* and SECAM video signals with amplitude from 0.5V to 2V p-p. The integrated circuit is also capable of providing sync separation for on-standard, faster horizontal rate video signals. The vertical output is produced on the rising edge of the first serration in the vertical sync period. A default vertical output is produced after a time delay if the rising edge mentioned above does not occur within the externally set delay period, such as might be the case for a non-standard video signal.

Download Video Sync Separator LM1881

Wireless Audio Link IC BH1415F

noreply@blogger.com (Go2Media) — Tue, 01 Jul 2008 08:20:00 +0000

The BH1415F is a FM stereo transmitter IC that transmits simple configuration. The IC consists of a stereo modulator for generating stereo composite signals and a FM transmitter for broadcasting a FM signal on the air. The stereo modulator generates a composite signal which consists of the MAIN, SUB, and pilot signal from a 38kHz oscillator. The FM transmitter radiates FM wave on the air by modulating the carrier signal with a composite signal.

Download BH1415F Datasheet

LM75 Digital Temperature Sensor and Thermal Watchdog with Two-Wire Interface

noreply@blogger.com (Go2Media) — Tue, 01 Jul 2008 07:26:00 +0000

The LM75 is a temperature sensor, Delta-Sigma analog-to-digital converter, and digital over-temperature detector with I2C® interface. The host can query the LM75 at any time to read temperature. The open-drain Overtemperature Shutdown (O.S.) output becomes active when the temperature exceeds a programmable limit. This pin can operate in either “Comparator” or “Interrupt” mode.

Download LM75 Datasheet

2.0 GHz Frequency Synthesizer for RF Personal Communications LMX2322

noreply@blogger.com (Go2Media) — Mon, 30 Jun 2008 15:25:00 +0000

The LMX2322 is a high performance frequency synthesizer with integrated 32/33 dual modulus prescaler designed for RF operation up to 2.0 GHz. Using a proprietary digital phase locked loop technique, the LMX2322’s linear phase detector characteristics can generate very stable, low noise control signals for UHF and VHF voltage controlled oscillators.

Download LMX2322 Datasheet

FM Stereo Transmitter IC BA1404(F)

noreply@blogger.com (Go2Media) — Mon, 30 Jun 2008 04:39:00 +0000

The BA1404 and BA1404F monolithic ICs are stereo transmitters. Each IC consists of a stereo modulator that creates stereo composites signals, an FM Modulator creates FM signals and an RF amplfier. The stereo modulator develops composite signals made up of a MAIN (L+R) signal, a SUB (L-R) signal and a pilot (19KHz) signal using 38 KHzcrystal oscillators.

The FM modulator has carries on the FM broadcast band (75-108 MHz). The RF amplifier transmits the stereo encoded FM signal an is also a buffer for the FM modulator. The stereo transmitter is equipped with a constant voltage pin for a variable capacitor that is used to finely adjust the FM frequency.

Download FM Stereo transmitter IC BA1404(F) datasheet.

Wireless Audio Link IC BH1417F

noreply@blogger.com (Go2Media) — Mon, 30 Jun 2008 04:29:00 +0000

The BH1417F is a FM stereo transmitter IC that transmits simple configuration. The IC consists of a stereo modulator for generating stereo composite signals and a FM transmitter for broadcasting a FM signal on the air. The stereo modulator generates a composite signal which consists of the MAIN, SUB, and pilot signal from a 38kHz oscillator.

The FM transmitter radiates FM wave on the air by modulating the carrier signal with a composite signal.

Download Wireless Audio Link IC BH1417F

1.0 A, Adjustable Output Voltage, Step−Down Switching Regulator LM2575

noreply@blogger.com (Go2Media) — Sun, 29 Jun 2008 19:10:00 +0000

The LM2575 series of regulators are monolithic integrated circuits ideally suited for easy and convenient design of a step−down switching regulator (buck converter). All circuits of this series are capable of driving a 1.0 A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5.0 V,
12 V, 15 V, and an adjustable output version.

Download LM2575 Switching Regulator Datasheet.

LM555 Timer

noreply@blogger.com (Go2Media) — Sun, 29 Jun 2008 18:50:00 +0000

The LM555 is a highly stable device for generating accurate time delays or oscillation. Additional terminals are provided for triggering or resetting if desired. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor.

For astable operation as an oscillator, the free running frequency and duty cycle are accurately controlled with two external resistors and one capacitor.
The circuit may be triggered and reset on falling waveforms, and the output circuit can source or sink up to 200mA or drive TTL circuits.

Download LM555 Timer Datasheet

Triple Video Buffer with Filter for SD Video TSH173

noreply@blogger.com (Go2Media) — Sat, 28 Jun 2008 17:17:00 +0000

The TSH173 is a single supply triple video buffer featuring an internal gain of 6dB and an internal low pass filter of 8.2MHz cut-off frequency for each channel to fit with Standard Definition requirements for video line interfaces.

Download Triple Video Buffer with Filter for SD Video TSH173

2.2V to 5V Video Buffer with SAG Correction

noreply@blogger.com (Go2Media) — Sat, 28 Jun 2008 16:53:00 +0000

The TSH120 is a video buffer that includes a voltage feedback amplifier with an internal gain of 6dB, rail-to-rail output, internal input biasing and SAG correction. A power down function offers a sleep mode with ultra low consumption.

The TSH120 also features an internal reconstruction filter in order to attenuate the
parasitic 27MHz frequency from the clock of the video DAC.

Download 2.2V to 5V Video Buffer with SAG Correction

LM903 Fluid Level Detector

noreply@blogger.com (Go2Media) — Fri, 27 Jun 2008 18:55:00 +0000

All supervisory requirements to control the thermal-resistive probe, including short and open circuit probe detection, are incorporated within the device. The circuit has possible applications in the detection of hydraulic fluid, oil level, etc., and may be used with partially conducting fluids.

Download LM903 Fluid Level Detector Datasheet.

Stereo Tone - Volume Control Circuit TDA1524A

noreply@blogger.com (Go2Media) — Thu, 26 Jun 2008 11:04:00 +0000

The device is designed as an active stereo-tone/volume control for car radios, TV receivers and mains-fed equipment. It includes functions for bass and treble control, volume control with built-in contour (can be switched off) and balance. All these functions can be controlled by d.c. voltages or by single linear potentiometers.

Download Stereo-Tone - Volume Control Circuit TDA1524A Datasheet

2 x 1 W Portable-/Mains-Fed Stereo Power Amplifier TDA7053

noreply@blogger.com (Go2Media) — Thu, 26 Jun 2008 10:48:00 +0000

The TDA7053 is an integrated class-B stereo power amplifier in a 16-lead dual-in-line (DIL) plastic package. The device,consisting of two BTL amplifiers, is primarily developed for portable audio applications but may also be used in mains-fed applications.

Download Datasheet 2 x 1 W Portable-/Mains-Fed Stereo Power Amplifier TDA7053

The 7 Segment Display

noreply@blogger.com (Go2Media) — Thu, 26 Jun 2008 04:20:00 +0000

The 7 segment display is found in many displays such as microwaves or fancy toaster ovens and occasionally in non cooking devices. It is just 7 LEDs that have been combined into one case to make a convenient device for displaying numbers and some letters. The display is shown on the left. The pinout of the display is on the right.

This version is a common anode version. That means that the positive leg of each LED is connected to a common point which is pin 3 in this case. Each LED has a negative leg that is connected to one of the pins of the device. To make it work you need to connect pin 3 to 5 volts. Then to make each segment light up, connect the ground pin for that led to ground. A resistor is required to limit the current. Rather than using a resistor from each LED to ground, you can just use one resistor from Vcc to pin 3 to limit the current.

The following table shows how to form the numbers 0 to 9 and the letters A, b, C, d, E, and F.
'0' means that pin is connected to ground. '1' means that pin is connected to Vcc.

Audio Power Amplifier LM386

noreply@blogger.com (Go2Media) — Tue, 24 Jun 2008 03:53:00 +0000

The LM386 is a power amplifier designed for use in low voltage consumer applications.

Download LM386 Low Voltage Power Amplifier Datasheet