MAXIM Manuals

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The MAX187/MAX189 are 12-bit serial analog-to-digital converters (ADCs) from Texas Instruments with 8.5µs sampling rate and 75ksps throughput rate. They support SPI™, QSPI™ and Microwire™ interface.

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MAX1744/MAX1745 are high-voltage, step-down DC-DC controllers in µMAX capable of handling up to 36V inputs. These parts use a proprietary current-limited control scheme for excellent light- and full-load efficiency, while their 330kHz (max) switching frequency permits small external components for space-critical applications. Operation to 100% duty cycle permits the lowest possible dropout voltage. The MAX1744 contains an internal feedback network that provides a pin-selectable output voltage of either 3.3V or 5V. The MAX1745 uses an external feedback network to generate an adjustable output voltage between 1.25V and 18V. The MAX1744/MAX1745 are available in a space-saving 10-pin µMAX package.

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The MAX1583 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board for evaluating the MAX1583 white LED flash boost converter. The EV kit accepts a 2.6V to 5.5V input voltage and drives up to five series white LEDs with a constant current to pro- vide camera flash/strobe in cell phones, PDAs, DSCs, and other hand-held devices. The MAX1583 switching frequency is 1MHz, allowing tiny external components. Two logic inputs control four modes of operation: shut- down mode (0.5µA max), movie mode for high-efficien- cy continuous lighting (programmable up to 100mA), precharge mode for charging a reservoir capacitor to 24V while the LEDs are off (POK output indicates a full reservoir capacitor), and strobe mode for firing the flash during an exposure with a regulated current program- mable up to 300mA (100mA with installed compo- nents). A pushbutton pulse generator is installed to sim- ulate a 30ms flash pulse. The MAX1583 comes with the MAX1583X (1A current limit) installed, but the entire MAX1583 family can be eval- uated with this EV kit with minor component changes.

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The MAX1242/MAX1243 are low-power, 10-bit analog-to-digital converters (ADCs) available in 8-pin pack- ages. They operate with a single +2.7V to +5.25V supply and feature a 7.5µs successive-approximation ADC, a fast track/hold (1.5µs), an on-chip clock, and a high-speed, 3-wire serial interface. Power consumption is only 3mW (VDD = 3V) at the 73ksps maximum sampling speed. A 2µA shutdown mode reduces power at slower throughput rates. The MAX1242 has an internal 2.5V reference, while the MAX1243 requires an external reference. The MAX1243 accepts signals from 0V to VREF, and the reference input range includes the positive supply rail. An exter- nal clock accesses data from the 3-wire interface, which connects directly to standard microcontroller I/O ports. The interface is compatible with SPI™, QSPI™, and Microwire™. Excellent AC characteristics and very low power com- bined with ease of use and small package size make these converters ideal for remote-sensor and data- acquisition applications, or for other circuits with demanding power consumption and space require- ments. The MAX1242/MAX1243 are available in 8-pin DIP and SO packages. Applications Portable Data Logging Process Control Monitoring Test Equipment Temperature Measurement Isolated Data Acquisition

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The MAX1065/MAX1066 are 14-bit, low-power successive approximation analog-to-digital converters (ADCs) that feature automatic power-down, a factory-trimmed internal clock, and a high-speed, 14-bit-wide (MAX1065) or byte-wide (MAX1066) parallel interface. The devices operate from a single 4.75V to 5.25V analog supply and a 2.7V to 5.25V digital supply. The MAX1065/MAX1066 use an internal 4.096V reference or an external reference. The MAX1065/MAX1066 consume only 1.8mA at a sampling rate of 165ksps with external reference and 2.7mA with internal reference. AutoShutdown™ reduces supply current to 0.1mA at 10ksps. The MAX1065/MAX1066 are ideal for high-performance, battery-powered, data-acquisition applications. Excellent dynamic performance and low-power consumption in a small package make the MAX1065/ MAX1066 the best choice for circuits with demanding power consumption and space requirements. The 14-bit-wide MAX1065 is available in a 28-pin TSSOP package, and the byte-wide MAX1066 is available in a 20-pin TSSOP package. Both devices are available in either the 0°C to +70°C commercial, or the -40°C to +85°C extended temperature range.

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The MAX6315 is a low-power CMOS microprocessor (µP) supervisory circuit designed specifically for monitoring power supplies in µPs and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments.

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The MAX522 is a dual-channel 8-bit digital-to-analog converter with low power consumption and a compact SO package. It can be used for voltage adjustment, current source, bias control, and VCO tuning.

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The document introduces the characteristics of MAX481, MAX483, MAX485, MAX487–MAX491, and MAX1487, including working voltage, supply current, data transmission rate, etc.

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MAX4754/MAX4755/MAX4756 are low on-resistance analog switches that can be used to switch audio or data signals. They operate from a single +1.8V to +5.5V power supply and feature low RON (0.5Ω) audio switches capable of handling full swing signals.

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The MXL1013/MXL1014 is a high-precision dual/quad op amp from Maxim with a typical offset voltage of 40µV, 0.3µV/°C drift and 117dB CMRR and 120dB PSRR.

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The MAX1945R/MAX1945S high-efficiency pulse-width modulation (PWM) switching regulators deliver up to 6A of output current. The devices operate from an input supply range of 2.6V to 5.5V and provide selectable output voltages of 1.8V, 2.5V, and adjustable output voltages from 0.8V to 85% of the supply voltage. With VCC at 3.3V/5V, the input voltage can be as low as 2.25V. The MAX1945R/MAX1945S are ideal for on-board post-regulation applications. Total output voltage error is less than ±1% over load, line, and temperature. The MAX1945R/MAX1945S operate at a selectable fixed frequency (500kHz or 1MHz) or can be synchronized to an external clock (400kHz to 1.2MHz). The high operating frequency minimizes the size of external components. The high bandwidth of the internal error amplifier provides excellent transient response. The MAX1945R/MAX1945S have internal dual N-channel MOSFETs to lower heat dissipation at heavy loads. Two MAX1945R/MAX1945Ss can operate 180 degrees out-of-phase of each other to minimize input capacitance. The devices provide output voltage margining for board-level testing. The MAX1945R provides a ±4% voltage margining. The MAX1945S provides a ±9% voltage margining. The MAX1945R/MAX1945S are available in 28-pin TSSOP-EP packages and are specified over the -40°C to +85°C industrial temperature range. An evaluation kit is available to speed designs.

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This file introduces the features of 80C51 series compatible 80C52, including 80C52 compatible 8051 pin and instruction set, four 8-bit I/O ports, three 16-bit timers/counters, 256 bytes of on-chip memory, 16KB of program memory, 1KB of additional on-chip SRAM for MOVX, ROMSIZE feature selects internal ROM size from 0 to 16KB, allows access to entire external memory mapping, dynamically adjustable by software, useful as boot block for external flash, high-speed architecture, 4 clocks/machine cycle(8051=12), runs DC to 33MHz clock rates, single-cycle instruction in 121ns, dual data pointer, optional variable length MOVX to access fast/slow RAM/peripherals, programmable clock source to save power, CPU runs from (crystal/64) or (crystal/1024), provides automatic hardware and software exit, EMI reduction mode disables ALE, two full-duplex hardware serial ports, high integration controller includes: power fail recovery, on-chip oscillator, on-chip power management, on-chip power monitor, on-chip reset, on-chip EEPROM, on-chip flash, on-chip RAM, on-chip I/O.

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The DS80C390 is a fast 8051-compatible microprocessor with dual CAN 2.0B controllers. It executes 8051 instructions up to 3X faster than the original for the same crystal speed.

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The DS1602 is a real-time clock/elapsed time counter designed to count seconds when VCC power is applied and continually count seconds under battery backup power with an accuracy of two 32-bit counters. The counters can track seconds for over 125 years. It can count seconds from the time the battery is attached until VBAT is less than 2.5V. It can also count seconds while VCC is above VTP and retain the count in the absence of VCC under battery backup power. The clear function resets the selected counter to 0. The read/write serial port affords low pin count. The maximum current drain is less than 1µA from the VBAT pin when the serial port is disabled. It uses a one byte protocol to define read/write, counter address, and software clear function. It is available in an 8-pin DIP or optional 8-pin SOIC package. It operates in a temperature range of -40°C to +85°C. It can operate with reduced performance down to VCC = 2.5V. It is recognized by Underwriters Laboratory (UL).

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The DS87C520/DS83C520 is a high-integration 80C52 compatible microcontroller with four 8-bit I/O ports, three 16-bit timers/counters, 256 bytes of on-chip RAM and 16KB of program memory.

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DS1603 is a dual counter real-time clock/elapsed time counter produced by Maxim, which has 2.5V battery power, 10-year ultra-long running time and ±2 minutes/month clock accuracy. The device adopts 32-bit dual counters, which can respectively record real-time time and cumulative time, respectively, under VCC and VBAT power supply.

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