PT6901 is an open loop current mode control high brightness LED driver IC. PT6901 can be programmed TO operate in either constant frequency or constant off-time mode. The frequency can be programmable set as 30KHz~300KHz. The PT6901 is ideally suited for buck LED drivers. It exports PWM signal TO control the external MOS. The PT6901 supply VOLTAGE input range is from 8V TO 12V, and the output current can be programmed between a few milliamps and up TO more
than 1.0A. PT6901 can drive a single or multiple series LEDs, and provide reliability constant current output by detecting LED peak current.
• Constant frequency or constant off-time operation
• 8V TO 12V input range
• LED string from one TO hundreds diodes
• Applications from a few mA TO more than 1A LED driver
The AD ADC80 is a complete 12-bit successive-approximation analog-TO-digital CONVERTER that includes an internal clock, reference, and comparaTOr. Its hybrid IC design uses MSI digital and linear monolithic chips in conjunction with a 12-bit monolithic DAC TO provide modular performance and versatility with IC size, price, and reliability.
True 12-Bit Operation: Max Nonlinearity 0.012%
Low Gain T.C.: 30 ppm/C Max
Low Power: 800 mW
Fast Conversion Time: 25 s
Precision 6.3 V Reference for External Application
Parallel Data Output
Monolithic DAC with Scaling ResisTOrs for Stability
DESCRIPTION The SP9504 is a low power replacement for the popular SP9345, Quad 12-Bit Digital-TO-Analog CONVERTER. It features +4.5V output swings when using ±5 volt supplies. The CONVERTER is double buffered for easy microprocessor interface. Each 12-bit DAC is independently addressable and all DACS may be simultaneously updated using a single transfer command. The output settling time is specified at 4µs. The SP9504 is available in 28–pin SOIC and plastic DIP packages, specified over commercial temperature range.
■ Low Cost ■ Four 12–Bit DAC’s on a Single Chip ■ Low Power — 80 mW (20mW/DAC) ■ Double-Buffered Inputs ■ ± 5V Supply Operation ■ VOLTAGE Outputs, ±4.5V Range ■ Midscale Preset, Zero Volts Out ■ Guaranteed +0.5 LSB Max INL ■ Guaranteed +0.75 LSB Max DNL ■ 2MHz 4-Quadrant Multiplying Bandwidth ■ 28–pin SOIC and Plastic DIP Packages ■ Either 12 or 8 bit µP bus
■ DESCRIPTION The MB88146A is an 8-bit D/A CONVERTER with twelve built-in channels. The 12 analog outputs each have a builtin OP amplifier with large current drive-capability. The data input/output format is CS (chip select) with serial bus connection available. A built-in 12-bit I/O expander enables serial ↔ parallel conversion (8 of the 12 bits can also be used for analog output). This product can be used for microcontroller port expansion, electronic level adjustment, replacement of semi-fixed resistance for tuning, etc.
■ FEATURES • Ultra low power consumption (1.2 mW/chl: typical) • Ultra compact package • Built-in 12-channel R-2R type 8-bit D/A CONVERTER • Built-in 12-bit I/O expander (8 bits also function as analog output) • Built-in analog output amplifier (sink current 1.0 mA maximum, source current 1.0 mA maximum) • Built-in power-on detection circuit (initialized at detection of VccD power-on) • MCU interface compatible with 3 V TO 5 V systems • Power divided inTO MCU interface power supply (VccD) and OP amplifier power supply (VccA), D/A CONVERTER power supply (VccD) • Analog output capability from 0 V TO VccA • Serial data I/O operates TO maximum of 2.5 MHz (in cascade connection, up TO 2.5 MHz when VccD = 5 V, up TO 1.5 MHz when VccD = 3 V) • CMOS process • Choice of two packages: SDIP-24 pin and SSOP-24 pin.