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Analog Devices offers a comprehensive portfolio of innovative, high performance analog ICs specifically designed to extend today's consumer digital lifestyle to cellular handsets. more ...
Power Management for Wireless Devices
Power control is essential in a modern handset design, as integrated multimedia and control features continue to push power consumption while long standby and talk times need to be maintained. Analog Devices offers a range of specifically designed, high efficiency, integrated solutions requiring reduced component count and more compact cellular handset design.
High Efficiency, High Power, Feature-Rich Flash LED Driver for Mid- to High End Camera Phones
The ADP1653 is an ultracompact, high efficiency, 12 V boost converter, specifically designed and optimized for use in cellular camera phones. The ADP1653 consumes a mere 7.2 mm × 6.4 mm of board space while still offering high efficiency flash circuitry that can drive one string of high brightness LEDs up to 500 mA, as well as a separate indicator LED at lower currents up to 17 mA. This device employs a dual-mode interface, which can be set to I2C® or to a 2-bit logic interface. With both interfaces, the flash LED may be driven in torch or flash mode. The ADP1653 also offers a unique Tx masking feature intended to dynamically reduce the current of the flash LED in less than 50 µs, when the current of the power amplifier bursts in RF transmission. The ADP1653 integrates multiple safety features such as soft start, flash timeout, power NFET current limit, overthermal protection, and overvoltage protection. Small size, high efficiency, advanced programmability, and safety are just some of the key advantages of the new ADP1653 flash LED driver.
RF Power Detectors for 3G+ Communications
Third-generation communications systems utilize complex modulation schemes to provide increasing data rates. The resulting signals have large and changing crest factors (peak to average ratios). To avoid clipping of these signals, PAs must be operated in their linear region where they are less efficient and, thus, consume higher levels of power. Accurate power measurement and control will help extend the battery usage time as well as assure compliance to the local regulatory requirements, such as ETSI and FCC. Measuring the true power levels of complex waveforms can be very difficult. RMS power detectors are the best for this application as they measure the true rms power level of the signal. Log detectors and peak detectors are much more sensitive to crest factors and can introduce errors of 2 dB to 5 dB. Temperature stability is another factor since PAs will drift with time and temperature. Power detectors from Analog Devices exhibit minimal drift over the full �40°C to +85°C range. The two newest rms power detectors for handsets/mobile terminals from ADI are the ADL5500 and ADL5501.
Parallel Backlight Drivers
End users are demanding bigger, brighter, and thinner displays. The ADM8845 and ADM8843 charge-pump-based backlight drivers are designed for driving up to six and four white LEDs in parallel, respectively, while ensuring uniform brightness of a backlit LCD display. By individually monitoring each LED current, excellent matching performance is achieved. The ADM8843 and ADM8845 are also designed to maximize power efficiency by switching automatically between three charge pump modes based on the input voltage. For applications with severe height restrictions, the ADM8843 offers an ultrathin package height of 0.5 mm.
Video Camera/Display for Wireless Devices
ADI offers a wide range of solutions for video cameras and displays that make it easy to add video interface, integrated camera, digital television, digital radio, finger-driven navigation, touch screens, gaming, and lots more. Our technology enables precision lens control, brighter camera flash, brighter display lighting, and HDMI™ output to provide the ultimate user experience.
Lens Driver Optimized for Voice Coil Motor (VCM) Autofocus Camera Modules
The AD5821 lens driver is a single 10-bit DAC with 120 mA output sink current capability. It is designed to meet the requirements of autofocus (AF) applications in camera phones, camera modules, webcams, and PC cams. The IC operates from a single 2.7 V to 5.5 V supply and is controlled via a 2-wire (I2C-compatible) serial interface and has 1.8 V-compatible logic thresholds compatible with new digital cores.
Feature-Rich, Volume-Priced Video Buffer Reduces Power and Size for Portable Applications
The ADA4431-1 video buffer includes a standard definition video filter, automatic load detection, and a capless output stage. The device has a low quiescent current of 4 mA. The load detection feature turns on most circuitry the moment a cable is connected to the outputs. The charge pump reduces the need for a negative supply and eliminates the need for large ac coupling capacitors. This integrated product eliminates large passive filter networks, ac coupling, and the board space required to accommodate multiple components. It is available in a 24-lead LFCSP.
ADV7520NK: Low Power HDMI Transmitter with On-Chip Consumer Electronics Control (CEC) Support
The ADV7520NK is an 80 MHz High-Definition Multimedia Interface (HDMI) transmitter that is perfect for cellular handsets. The digital video interface contains an HDMI v1.3 and DVI v1.0 compatible transmitter and supports HDTV formats up to 720p/1080i. The ADV7520NK also supports the programmable AVI InfoFrames and x.v.Color™ features of HDMI v1.3. With the inclusion of HDCP, the ADV7520NK allows the secure transmission of protected content as specified by the HDCP v1.3 protocol.
Sensors and User Interface ICs for Wireless Devices
Analog Devices offers design engineers a wide range of touch control and motion sensor solutions making it easy to add new features. Our technology enhances user interface and many motion-enabled applications for the ultimate user experience.
Touch Control ICs Enhance User Experience
For products with increasing feature convergence, finger-driven navigation enhances the user experience for both designers and consumers. The AD714x CapTouch® family of programmable capacitance-to-digital converters enables the design of innovative and robust touch control interfaces to replace mechanical switches in mobile handset devices. For single electrode capacitance sensors, the AD7147 provides highly accurate measurement and responsiveness. Featuring 13 capacitance inputs and femtofarad resolution, the AD7147 allows mobile electronics designers to implement a touch pad, scroll wheel, slider, or up to 36 buttons per device. The addition of integrated active shield technology on the AD7147 improves noise performance and allows designers the freedom to place the sensor farther away from the IC. The device also includes on-chip calibration algorithms that compensate for changes in temperature and humidity while ensuring that users with different finger sizes receive equally responsive sensor performance.
iMEMS Motion Signal Processing™
iMEMS® low power motion sensors can be used for numerous applications in cellular handsets, including enhanced user interface, situational awareness, gaming, tilt correction for compass-equipped phones, drop protection, camera image stabilization, and more. Recognized for its MEMS manufacturing technology and ability to combine MEMS sensor structures with signal conditioning circuitry, Analog Devices leveraged this expertise to reduce the power consumption of its ADXL3xx family of 3-axis motion sensors to a mere 180 µA at a supply voltage of 1.8 V. Available in a low profile 4 mm × 4 mm × 1.45 mm plastic lead frame chip scale package (LFCSP), iMEMS motion sensors are among the most reliable and smallest available today. Combined, these unique qualities allow designers to incorporate motion-sensing features into cellular handsets where space and power are at a premium.
Audio Systems for Wireless Devices
As a pioneer in digital audio, ADI offers a wide range of handset audio subsystem products that enable higher quality audio for music, videos, games, and voice recognition. This includes longer playback time, smaller size, lower noise, reduced distortion, and overall better sound.
High Efficiency, Mono Class-D Audio Amplifier with Automatic Level Control
The SSM2317 is a fully integrated, super high efficiency Class-D audio amplifier with ALC (auto level control) function built in. This function can be activated to suppress clipping and improve dynamic range. This feature only requires one external resistor tied to GND via the VTH pin and an activation voltage on the ALC_EN pin. It is designed to maximize audio performance for mobile phone applications. The SSM2317 also features a high efficiency, low noise modulation scheme that does not require any external LC output filters. The modulation continues to provide high efficiency even at low output power. It operates with 90% efficiency at 1.4 W into 8 Ω or 85% efficiency at 3 W into 3 Ω from a 5.0 V supply and has an SNR of >93 dB. Spread-spectrum pulse density modulation (PDM) is used to provide lower EMI radiated emissions compared with other Class-D architectures. The SSM2317 is specified over the industrial temperature range of -40°C to +85°C. It has built-in thermal shutdown and output short-circuit protection. It is available in a 9-ball, 1.5 mm × 1.5 mm wafer level chip scale package (WLCSP).
Low Noise, Ultralow Power, Digital Output Microphone Preamp
The ADAU1301 is a low noise, ultralow power, digital output preamp designed for embedding into miniature microphone modules where it offers best-in-class signal-to-noise ratio, low distortion, and unsurpassed EMI and RF immunity. Consuming typically 400 µA from a 1.8 V supply voltage, the ADAU1301 provides 20 kHz bandwidth, a signal-to-noise ratio exceeding 61 dB, and a dynamic range of more than 86 dB. The ADAU1301 includes sleep mode with rapid wake-up and can be configured to support left and right mode operation on one data input. The ADAU1301 is available in a 0.8 mm × 1.2 mm chip scale package as well as a bare die.
Sensors and User Input ICs
|Touch Control ICs|
|AD7142||Capacitive touch sensors for keypads, navigation wheels, buttons, and sliders||Order Samples|
|AD7143||Capacitive touch sensors for keypads, navigation wheels, buttons, and sliders||Order Samples|
|AD7147||Capacitive touch sensors for keypads, navigation wheels, buttons, and sliders||Order Samples|
|AD7148||Capacitive touch sensors for keypads, navigation wheels, buttons, and sliders||Order Samples|
|Touch Screen Controllers|
|AD7877||Touch screen controller with LCD noise reduction feature||Order Samples|
|AD7843||Touch screen digitizer, 1.4 mW power at 125 kSPS||Order Samples|
|AD7873||Touch screen digitizer, 1.4 mW power at 125 kSPS||Order Samples|
|ADXL323||2-Axis accelerometer, ±3 g range||Order Samples|
|ADXL330||3-Axis accelerometer, ±3 g range||Order Samples|
|ADT75||Digital-output temperature sensor, 8-lead, 3.0 mm × 4.9 mm MSOP||Order Samples|
RF Power Detectors/Controllers
|AD8314||45 dB RF detector/controller for GSM/CDMA/W-CDMA||Order Samples|
|AD8315||50 dB RF detector/controller for GSM/EDGE||Order Samples|
|AD8311||50 dB GSM PA controller, 1 mm × 1.5 mm WLCSP||Order Samples|
|AD8312||45 dB RF detector for GSM/CDMA/W-CDMA||Order Samples|
|TruPwr™ RMS Response|
|AD8361||30 dB detector for CDMA/W-CDMA||Order Samples|
|ADL5500||30 dB detector for CDMA/W-CDMA, 1 mm × 1 mm WLCSP||Order Samples|
|ADL5501||30 dB detector for CDMA/W-CDMA, SC70||Order Samples|
Power Management ICs
|LCD Display Backlight Drivers|
|ADM8843||Precision LED drivers for 4 LEDs: 1% current matching||Order Samples|
|ADM8845||Precision LED drivers for 6 LEDs: 1% current matching||Order Samples|
|White LED Flash Drivers|
|ADP1653||I2C-programmable, 3 W LED driver in 3 mm × 3 mm, 16-lead LFCSP||Order Samples|
|ADG787||Dual 2:1 USB 1.1 switch in 1.5 mm × 2.0 mm LFCSP||Order Samples|
|ADG772||USB 1.1/USB 2.0, 2 × SPDT audio switch in 1.3 mm × 1.6 mm LFCSP||Order Samples|
|ADG3242||2 × SPST USB 2.0 switch in 8-lead, 2.8 mm × 2.8 mm SOT-23||Order Samples|
Video, Imaging, and Display ICs
|Camera Module ICs|
|AD5398||Lens driver for autofocus with VCM, 1.5 mm × 1.7 mm WLCSP and LFCSP||Order Samples|
|AD5821||Lens driver for autofocus with VCM, 1.8 V I2C interface, 1.5 mm × 1.7 mm WLCSP, die and wafer available||Order Samples|
|TV Output Devices|
|AD9387NK||High performance, low power HDMI interface in 6 mm × 6 mm, 76-ball CSP_BGA||Order Samples|
|ADV7179||NTSC/PAL video encoder, 40-lead, 6 mm × 6 mm LFCSP||Order Samples|
|ADV7390||NTSC/PAL/HDTV video encoder, 32-lead, 5 mm × 5 mm LFCSP||Order Samples|
|ADV7520NK||Low power HDMI interface with on-chip CEC support, 1080i on 1.8 V single supply||Order Samples|
|ADA4431-1||Ultralow power SD video filter integrating load detection, dc output coupling, and SAG correction||Order Samples|
|TV Input Devices|
|ADV7180||10-Bit NTSC/PAL/SECAM decoder||Order Samples|
|AD8541||Audio microphone preamplifier 45 µA/amplifier||Order Samples|
|AD8692||Audio microphone preamplifier 8 nVvHz noise, 10 MHz BW||Order Samples|
|SSM2301||Mono filterless Class-D audio power amplifiers; 0.1% THD @ 1 W, 90% efficiency||Order Samples|
|SSM2311||Mono filterless Class-D audio power amplifiers; 0.1% THD @ 1 W, 90% efficiency||Order Samples|
|SSM2302||Stereo filterless Class-D audio power amplifiers; 0.1% THD @ 1 W, 90% efficiency||Order Samples|
|SSM2304||Stereo filterless Class-D audio power amplifiers; 0.1% THD @ 1 W, 90% efficiency||Order Samples|
|SSM2306||Stereo filterless Class-D audio power amplifiers; 0.1% THD @ 1 W, 90% efficiency||Order Samples|
|SSM2211||1.5 W, Class-AB audio power amplifier, 0.2% THD @ 1 W||Order Samples|
|ADG884||0.28 Ω, 400 µA, 2 × SPDT audio switch in 2 mm × 1.5 mm WLCSP||Order Samples|