EDN Product fEEd

The M34 and the M35 wet-tantalum capacitors operate over a –55 to +85°C temperature range and at temperatures as high as 125°C with voltage derating with a ±20% standard capacitance tolerance. The M34 provides a capacitance range of 10 µF at 125V to 120 µF at 25V; the M35 has a capacitance range of 1.7 µF at 125V to 220 µF at 6V and features a 3V reverse-voltage capability at 85°C. Available in a surface-mount, molded package, the M34 and the M35 cost $41.15 and $29.10, respectively.

Vishay Intertechnology, www.vishay.com

Providing the surge-handling characteristics typical of wire-wound devices, the WWF (wire-wound-fusible) series of  conformal-coated devices also features a repeatable-fusing characteristic. This feature works well in applications subject to constant or sustained overload, which results in excessive heat buildup. The devices allow adjustments for quick fusing. Thus, they generate minimal heat and slow fusing for applications in which fusing resistors can open too quickly. The devices can withstand high-voltage surges and allow inherent increases or decreases in voltage. One device in the series survives 6-kV inrush pulses without failing; however, it fails at 120 or 240V-ac steady-state overloads without flame or excessive heat. Prices for the units range from 20 cents to $1.75 (250 to 2500).

Stackpole Electronics, www.seielect.com

The 110R series of silicon-chip resistors uses high-stability, self-passivating, and moisture-resistant tantalum-nitride resistor elements, enabling the development of quick-turnaround prototypes in hybrid-microelectronics labs. Comprising a string of 20 resistors, each chip allow wire-bonding for a range of resistances. The strings include a set of 10 2.5-kΩ resistors and a set of 10 25-kΩ resistors, allowing for a 275-kΩ total resistance. Comprising 21 wire-bond pads, the devices provide values of 2.5 to 275 kΩ. Operating over a –55 to +125°C temperature range, the resistors provide a 250-ppm/°C TCR with 10-ppm/°C-maximum-TCR tracking between resistors. Each 110R resistor measures  34×34 mils, and prices range from $3.90 to $7.25, based on tolerance and volume.

OnChip Devices, www.onchip.com

The OPA775 and the OPA776 LED-backlighting-strip series features white LEDs and suits illumination of small and midsize displays requiring lighting intensity and reliability. Operating at 12V, the OPA775 includes a strip of 7.5-in. FR-4 board with three LEDs with one to 30 strips connected per bus. The strips feature Zierick 1286T connectors, allowing the “Jacob’s ladder” construction, enabling 30 strips to draw a total of 3.75A current. The OPA776 backlighting strips meet the OPA775 performance at a 24V operation. An OPA776 comprises two 7.5-in- FR-4 board strips with three LEDs per strip and a jumper-wire connection. The strips come in sets of 60 and draw a total current of 3.75A. The OPA775 and the OPA776 have a 50-lumen-per-strip luminous flux, with a 125-mA drive current to each LED. The vendor crimps the bus wires during manufa...Read More

The LM3445 constant-current controller uses a forward or reverse phase-controller triac to enable offline, uniform, flicker-free dimming of high-brightness LEDs. The device has a 100-to-1 range of dimming capability and maintains a 1A constant current to LEDs. The driver interfaces with resistive loads, such as incandescent or halogen light bulbs. An LED bulb does not appear as a resistive load to the wall dimmer, so dimming an LED bulb using a typical triac dimmer yields suboptimal performance. The LM3445 translates the triac-chopped waveform to a dim signal and decodes the signal for a full range of uniform, flicker-free dimming, preventing 120-Hz flicker and the limited dimming range of many other LED drivers. The LM3445 constant-current controller costs $1.75 (1000).

National Semiconductor, www.national.com

The ACPL-570xL/573xL/177xL series of hermetically sealed, high-gain optocouplers includes single-, dual-, and quad-channel devices. The 3.3V logic-gate devices enable operation over a –55 to +125°C temperature range, meeting aerospace, industrial, and military applications. The optocouplers allow designers to use low-power components, suiting microprocessor-system interfaces, process-control I/O isolation, voltage-level shifting, and logic-ground isolation. The devices reduce or eliminate the need for extra interface components or voltage converters. Each channel contains a GaAsP LED and an integrated high-gain photon detector. A high-gain output stage features an open-collector output, enabling lower saturation voltage and higher signal speed than typical photo-Darlington optocouplers. The supply voltage for the optocouplers suits operation...Read More

Based on the vendor’s LX1996 LED driver, the LXMG1960-28 backlight-driving integrated plug-and-play system suits midsized LED-backlit panels. Aiming at LCD televisions, notebook computers, automotive, and other display platforms and applications, the module consists of a boost converter and six programmable precision current sinks. The system drives as many as six strings of LEDs with string-to-string current matching of 1% for panel-brightness uniformity. A dedicated input pin works with an external thermistor, providing output-current foldback to protect the LEDs in overtemperature scenarios. Additional features include a 4.75 to 28V input voltage and support for dc-voltage, PWM-signal, and potentiometer-dimming methods, and a combination of analog and digital dimming, providing a 1000-to-1 dimming ratio. Available in an ROHS-compliant package...Read More

The 12-channel ADCLK954 LVPECL and the ADCLK854 LVDS/CMOS clock-fanout buffers provide 75- and 100-fsec jitter, respectively. The clock buffers have a 9-psec skew, suiting use in high-speed ADCs and DACs, wireless-infrastructure equipment, medical-imaging applications, and industrial applications. The 4.8-GHz ADCLK954 has two selectable differential inputs using the input-select control pin. Both inputs have 100Ω on-chip termination resistors. The clock buffers operation over a –40 to +85°C temperature range. The ADCLK954 comes in a lead LFCSP-48 with 12 or 24 channels and costs $5.95 (1000); the ADCLK954 comes in a lead LFCSP-40 package with 12 channels and costs $6.95 (1000).

Analog Devices, www.analog.com

The pin- and software-compatible 16-bit MAX5138 and 12-bit MAX5139 precision DACs accept three-wire SPI-, QSPI-, Microwire-, and DSP-compatible serial interfaces. Suiting industrial-control and -automation applications, the devices include a power-down feature that reduces power consumption by 200 nA and an integrated voltage reference with a 100-ppm/°C temperature coefficient. Measuring 3×3 mm, the MAX5138 and MAX5139 cost $3.39 and $1.60 (1000), respectively.

Maxim Integrated Products, www.maxim-ic.com

Aiming at automotive and industrial applications, the triple-air-core-gauge MLX10420 driver has a serial interface and drives two 360° meters and one 90° meter. The device uses sin/cos PWM drivers and serial commands to control two sets of CMOS power bridges. An on-chip oscillator sets 9-bit-per-quadrant-resolution PWM and a 10-bit angle display. Other features include a power-on self -test, which detects open- or short-circuit outputs for each meter and provides a real-time-angle-tracking scheme to avoid display errors. The device enables communication with the microprocessor using a three-wire serial link and provides an error-status output pin. Available in an SSOP20 package, the MLX10420 costs 98 cents (10,000).

Melexis Microelectronic Integrated Systems, www.melexis.com

Measuring tilt, shock, and acceleration, the ultralow-power, high-resolution ADXL346 iMEMS accelerometer operates at a 1.8V primary supply voltage. The digital three-axis smart-motion sensor provides selectable measurement ranges and measures dynamic acceleration from motion or shock and static acceleration, allowing use as a tilt sensor. The device includes an on-chip FIFO memory block storing as much as 32 samples of X-, Y-, and Z-axis data and off-loads the FIFO function from the host processor. This process allows the host processor and other peripherals to enter sleep mode when not in use. Features include a 0.1- to 1600-Hz selectable bandwidth and 150-µA power-consumption ranges at 1600-Hz bandwidth as low as 25 µA at less than 10 Hz. The accelerometer measures dynamic acceleration with user-selectable measurement ranges of ±2,...Read More

Providing acceleration values in the form of absolute analog outputs, the LIS352AX three-axis accelerometer motion sensor with operates with supply voltages of 2.16 to 3.6V and provides stability over temperature and time. Internal regulation voltage makes the measurements insensitive to variations in power-supply voltage that typically occur in battery-operated devices, such as mobile phones and other portable devices. This method enables space saving and reduced cost by connecting the sensor directly to the battery without a separate voltage regulator and by providing compatibility with the power-supply voltage that the application uses. The LIS352AX has high stability over a temperature range for zero-gravity offset and sensitivity, a ±0.3-mg/°C offset drift, and an accurate output over a full-scale range of ±2g. Available in a 3&...Read More

Suiting autofocus and zoom applications in camera-phone lenses, the A3907ECGTR voice-coil-motor driver has an I²C serial interface and a 2.3 to 5.5V operating range. The driver has a 102-mA maximum output current and operates at –40 to +85°C. Programmed using the I²C interface in 100-µA increments, the I²C inputs sets the internal 10-bit DAC output-voltage reference for linear-current control using a MOSFET output sink transistor and sense-resistor feedback. Additional features include a 10-nA input-supply current in sleep mode and I²C-compatible logic-input levels. Available in a 1.465×0.965-mm six-bump WLCSP-CG package, the A3907ECGTR costs 34 cents (1000).

Allegro Microsystems, www.allegromicro.com

The 10W CS3511 stereo analog-input Class D amplifier uses true spread-spectrum-switching-controller technology and a delta-sigma modulator with a patented closed-loop architecture. Features include 0.025% THD+N at 5W and 0.019% at 1W, support for single-ended or fully differential inputs, and operation from 9 or 12V. The amplifier offers built-in protection and error reporting with automatic recovery from overcurrent, thermal-overload and undervoltage conditions. Measuring 6×6 mm in a thermally enhanced QFN-32 package, the CS3511 costs $1.39 (10,000).

Cirrus Logic, www.cirrus.com

The low-power, long-life-cycle computer-on-module line includes Diamondville, a low-power Intel Atom N270 processor that operates at 1.5 GHz. Available in ETX and PICMG’s COM Express basic and compact sizes, the Express-AT basic measures 125×95 mm, and the Express-ATC compact measures 95×95 mm. Suiting medical equipment, portable devices, and industrial controllers, the Express-AT, Express-ATC, and ETX-AT claim seven-year life cycles. Prices for the modules start at $200.

Adlink Technology, www.adlinktech.com