Datasheet Component Blog

January 18, 2010

LM7909 3-Terminal 1A Negative Voltage Regulator

Filed under: Uncategorized — Tags: , , — Brad @ 12:48 pm
The LM7909 three terminal negative regulator is available in TO-220 package and with a fixed -9V output voltage, it is useful in a wide range of applications. Each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible.

Features
• Output Current in Excess of 1A
• Internal Thermal Overload Protection
• Short Circuit Protection
• Output Transistor Safe Operating Area Compensation

October 15, 2009

Microchip dsPIC30F1010 202X Enhanced Flash SMPS 16-Bit Digital Signal Controller

Filed under: Uncategorized — Tags: , , , — Brad @ 5:57 pm

The dsPIC series of microcontrollers are very high performance and are excellent for digital signal porcessing. These devices contain extensive Digital Signal Processor (DSP) functionality within a high-performance 16-bit microcontroller (MCU) architecture.

The dsPIC30F1010/202X High-Performance Modified RISC CPU has the following specs:
• Modified Harvard architecture
• C compiler optimized instruction set architecture
• 83 base instructions with flexible addressing
modes
• 24-bit wide instructions, 16-bit wide data path
• 12 Kbytes on-chip Flash program space
• 512 bytes on-chip data RAM
• 16 x 16-bit working register array
• Up to 30 MIPS operation:
- Dual Internal RC
- 9.7 and 14.55 MHz (±1%) Industrial Temp
- 6.4 and 9.7 MHz (±1%) Extended Temp
- 32X PLL with 480 MHz VCO
- PLL inputs ±3%
- External EC clock 6.0 to 14.55 MHz
- HS Crystal mode 6.0 to 14.55 MHz
• 32 interrupt sources
• Three external interrupt sources
• 8 user-selectable priority levels for each interrupt
• 4 processor exceptions and software traps
DSP Engine Features:
• Modulo and Bit-Reversed modes
• Two 40-bit wide accumulators with optional
saturation logic
• 17-bit x 17-bit single-cycle hardware fractional/
integer multiplier
• Single-cycle Multiply-Accumulate (MAC)
operation
• 40-stage Barrel Shifter
• Dual data fetch

June 21, 2009

Analog Devices ADXL series Accelerometers

Filed under: Uncategorized — Tags: , , , — Brad @ 12:52 pm

The Analog Devices ADXL series of Accelerometers are an amazing set of devices. As an example, the ADXL325 is a small, low power, complete 3-axis accelerometer with signal conditioned voltage outputs. The product measures acceleration with a minimum full-scale range of ±5 g. It can measure the static acceleration of gravity in tilt sensing applications, as well as dynamic acceleration resulting from motion, shock, or vibration.

The user selects the bandwidth of the accelerometer using the CX, CY, and CZ capacitors at the XOUT, YOUT, and ZOUT pins. Bandwidths can be selected to suit the application, with a range of 0.5 Hz to 1600 Hz for X and Y axes, and a range of 0.5 Hz to 550 Hz for the Z axis. The ADXL325 is available in a small, low profile, 4 mm × 4 mm × 1.45 mm, 16-lead, plastic lead frame chip scale package (LFCSP_LQ).

Functional Block Diagram:

June 13, 2009

LM386 Low Voltage Audio Power Amplifier

Filed under: Uncategorized — Tags: , , , — Brad @ 9:53 am

The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200.
The inputs are ground referenced while the output automatically biases to one-half the supply voltage. The quiescent power drain is only 24 milliwatts when operating from a 6 volt supply, making the LM386 ideal for battery operation.

Typical low part count application:


To make the LM386 a more versatile amplifier, two pins (1 and 8) are provided for gain control. With pins 1 and 8 open the 1.35 kW resistor sets the gain at 20 (26 dB). If a capacitor is put from pin 1 to 8, bypassing the 1.35 kW resistor, the gain will go up to 200 (46 dB). If a resistor is placed in series with the capacitor, the gain can be set to any value from 20 to 200. Gain control can also be done by capacitively coupling a resistor (or FET) from pin 1 to ground.

June 3, 2009

Digi XBee X-CTU Manual and Utility

Filed under: Uncategorized — Tags: , , , — Brad @ 8:31 pm

If you use Digi XBee modules for wireless communication, the Digi X-CTU application is a must. X-CTU is a Windows-based application provided by Digi. This program was designed to interact with the firmware files found on Digi’s RF products and to provide a simple-to-use graphical user interface to them. X-CTU is designed to function with all Windows-based computers running Microsoft Windows 98 SE and above. X-CTU can either be downloaded from Digi’s Web site or an installation CD.

The Digi X-CTU Datasheet can be downloaded here.

The Digi X-CTU application can be downloaded from Digi here.

X-CTU Screenshot:

May 28, 2009

XBee XBee-PRO 802.15.4 OEM RF Modules

Filed under: Uncategorized — Tags: , , , , — Brad @ 11:58 pm

The XBee/XBee-PRO ZB RF Modules are designed to operate within the ZigBee protocol and support the unique needs of low-cost, low-power wireless sensor networks. The modules require minimal power and provide reliable delivery of data between remote devices. The modules operate within the ISM 2.4 GHz frequency band and are compatible with the following:

• XBee RS-232 Adapter
• XBee RS-232 PH (Power Harvester) Adapter
• XBee RS-485 Adapter
• XBee Analog I/O Adapter
• XBee Digital I/O Adapter
• XBee Sensor Adapter
• XBee USB Adapter
• XStick
• ConnectPort X Gateways
• XBee Wall Router.

These are very powerful wireless modules that I have used extensively in projects, they are well worth talking a look at if you have not played with them in your latest wireless project.

May 13, 2009

LM7812 3-Terminal 1A Positive Voltage Regulator

Filed under: Uncategorized — Tags: , , , , — Brad @ 10:54 am

The LM78XX series including the LM7812 device are three terminal positive regulators available in the TO-220 package and with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut down and safe operating area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 1A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents.

Features:

Output Current up to 1A
Output Voltages of 5, 6, 8, 9, 10, 12, 15, 18, 24
Thermal Overload Protection
Short Circuit Protection
Output Transistor Safe Operating Area Protection

LM7812 Pin Assignment:

May 11, 2009

LM337 3-Terminal Adjustable Negative Regulators

Filed under: Uncategorized — Tags: , , , — Brad @ 10:10 pm

The LM137/LM337 are adjustable 3-terminal negative voltage regulators capable of supplying in excess of −1.5A over an output voltage range of −1.2V to −37V. These regulators are exceptionally easy to apply, requiring only 2 external resistors to set the output voltage and 1 output capacitor for frequency compensation. The circuit design has been optimized for excellent regulation and low thermal transients. Further, the LM137 series features internal current limiting, thermal shutdown and safe-area compensation, making them virtually blowout-proof against overloads.

The LM137/LM337 serve a wide variety of applications including local on-card regulation, programmable-output voltage regulation or precision current regulation. The LM137/ LM337 are ideal complements to the LM117/LM317 adjustable positive regulators.

May 9, 2009

LM324 Low Power Quad Operational Amplifiers

Filed under: Uncategorized — Tags: , , , — Brad @ 10:20 pm

The LM324 series consists of four independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate from a single power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage.

Application areas include transducer amplifiers, DC gain blocks and all the conventional op amp circuits which now can be more easily implemented in single power supply systems. For example, the LM124 series can be directly operated off of the standard +5V power supply voltage which is used in digital systems and will easily provide the required interface electronics without requiring the additional ±15V power supplies.

Unique Characteristics

- In the linear mode the input common-mode voltage range includes ground and the output voltage can also swing to ground, even though operated from only a single power supply voltage
- The unity gain cross frequency is temperature compensated
- The input bias current is also temperature compensated

LM324 Pinout:

May 8, 2009

LM358 Low Power Dual Operational Amplifier

Filed under: Uncategorized — Tags: , , , — Brad @ 10:30 am

The LM358 series consists of two independent, high gain, internally frequency compensated operational amplifiers which were designed specifically to operate from a single
power supply over a wide range of voltages. Operation from split power supplies is also possible and the low power supply current drain is independent of the magnitude of the power supply voltage.

Application areas include transducer amplifiers, dc gain blocks and all the conventional op amp circuits which now can be more easily implemented in single power supply
systems. For example, the LM158 series can be directly operated off of the standard +5V power supply voltage which is used in digital systems and will easily provide the required interface electronics without requiring the additional ±15V power supplies.

Device pinout:

« Newer PostsOlder Posts »

Powered by WordPress