MAXIM Manuals

The MAX5354/MAX5355 combine a low-power, voltage-output, 10-bit digital-to-analog converter (DAC) and a precision output amplifier in an 8-pin µMAX or DIP package. The MAX5354 operates from a single +5V supply, and the MAX5355 operates from a single +3.3V supply. Both devices draw less than 280µA of supply current. The output amplifier’s inverting input is available to the user, allowing specific gain configurations, remote sensing, and high output current capability. This makes the MAX5354/MAX5355 ideal for a wide range of applications, including industrial process control. Other features include a software shutdown and power-on reset. The serial interface is compatible with SPI™/QSPI™ and Microwire™. The DAC has a double-buffered input, organized as an input register followed by a DAC register. A 16-bit serial word loads data into the input register. The DAC register can be updated independently or simultaneously with the input register. All logic inputs are TTL/CMOS-logic compatible and buffered with Schmitt triggers to allow direct interfacing to opto-couplers.

The MAX8545/MAX8546/MAX8548 are voltage-mode pulse-width-modulated (PWM), step-down DC-DC controllers ideal for a variety of cost-sensitive applications. They drive low-cost n-channel MOSFETs for both the high-side switch and synchronous rectifier, and require no external current-sense resistor. These devices can supply output voltages as low as 0.8V. The MAX8545/MAX8546/MAX8548 have a wide 2.7V to 28V input range, and do not need any additional bias voltage. The output voltage can be precisely regulated from 0.8V to 0.83 x VIN. These devices can provide efficiency up to 95%. Lossless short-circuit and current-limit protection is provided by monitoring the RDS(ON) of the low-side MOSFET. The MAX8545 and MAX8548 have a current-limit threshold of 320mV, while the MAX8546 has a current-limit threshold of 165mV. All devices feature foldback-current capability to minimize power dissipation under short-circuit condition. Pulling the COMP/EN pin low with an open-collector or low-capacitance, open-drain device can shut down all devices. The MAX8545/MAX8546 operate at 300kHz and the MAX8548 operates at 100kHz. The MAX8545/MAX8546/MAX8548 are compatible with low-cost aluminum electrolytic capacitors. Input undervoltage lockout prevents proper operation under power-sag operations to prevent external MOSFETs from overheating. Internal soft-start is included to reduce inrush current. These devices are offered in space-saving 10-pin µMAX® packages.

This document introduces the characteristics of MAX3238 true RS-232 transceiver. The chip can operate at a power supply of 3.3V-5.5V and supports 5-driver/3-receiver. The maximum data transmission rate can reach 250kbps.

The MAX749 is a negative LCD-bias contrast voltage generator from Maxim Integrated that supports 2V to 6V input voltages. The full-scale output voltage can be scaled to -100V or greater, and is digitally adjustable in 64 equal steps by an internal digital-to-analog converter (DAC). The output voltage can also be adjusted using a PWM signal or a potentiometer. The MAX749 has a low static current (maximum 60µA) and a shutdown mode of only 15µA. It supports external P-channel MOSFET or PNP transistor driving, and is used in notebook computers, laptop computers, palmtop computers, personal digital assistants, communicating computers and portable data-collection terminals.

The MAX1602 is a single-channel CardBus and PCMCIA VCC/VPP power-switching network that features low-resistance MOSFET switches, small packaging, soft-switching action, and compliance with PCMCIA specifications for 3V/5V switching.

MAX3050/MAX3057 is a CAN bus interface device for automotive systems, with ±80V fault protection function, supporting 40kbps to 500kbps data rate, and can be used in automotive systems, HVAC controllers, telecom systems and 72V systems.

The MAX8667/MAX8668 are dual step-down converters and dual low-dropout (LDO) linear regulators designed to power low-voltage microprocessors or DSPs in portable devices. They offer high efficiency and small external component size. The step-down converters can be adjusted from 0.6V to 3.3V (MAX8668) or factory preset (MAX8667), with a guaranteed output current of 600mA for OUT1 and 1200mA for OUT2. The 1.5MHz hysteretic-PWM control scheme allows for tiny external components and reduces no-load operating current to 100µA. The dual low-quiescent-current, low-noise LDOs operate down to 1.7V supply voltage. The MAX8667/MAX8668 have individual enables for each output, maximizing flexibility. They are available in a space-saving, 3mm x 3mm, 16-pin thin QFN package.

The MAX9814 is a low-cost, high-quality microphone amplifier with automatic gain control (AGC) and low- noise microphone bias. The device features a low-noise preamplifier, variable gain amplifier (VGA), output amplifier, microphone-bias-voltage generator and AGC control circuitry. The low-noise preamplifier has a fixed 12dB gain, while the VGA gain automatically adjusts from 20dB to 0dB, depending on the output voltage and the AGC threshold. The output amplifier offers selectable gains of 8dB, 18dB, and 28dB. With no compression, the cascade of the amplifiers results in an overall gain of 40dB, 50dB, or 60dB. A trilevel digital input programs the output amplifier gain. An external resistive divider controls the AGC threshold and a single capacitor programs the attack/release times. A trilevel digital input programs the ratio of attack-to-release time. The hold time of the AGC is fixed at 30ms. The low-noise microphone-bias- voltage generator can bias most electret microphones. The MAX9814 is available in the space-saving 12-bump UCSP™ (1.5mm x 2mm) and 14-pin TDFN packages. This device is specified over the -40°C to +85°C extended temperature range.

This data sheet describes the MAX3224E/MAX3225E/MAX3226E/MAX3227E/ MAX3244E/MAX3245E. It contains information on the features, applications, pinout, electrical parameters, and usage of these devices.

The MAX9140/MAX9141/MAX9142/MAX9144 are high-speed comparators optimized for systems powered from a 3V or 5V supply.

The MAX4411 is a fixed-gain, stereo headphone amplifier from MAXIM that is designed for portable equipment where board space is at a premium. The MAX4411 uses a unique, patented DirectDrive architecture to produce a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, board space, and component height. Additionally, the gain of the amplifier is set internally (-1.5V/V, MAX4411 and -2V/V, MAX4411B), further reducing component count. The MAX4411 delivers up to 80mW per channel into a 16Ω load and has low 0.003% THD+N. An 86dB at 217Hz power-supply rejection ratio (PSRR) allows this device to operate from noisy digital supplies without an additional linear regulator. The MAX4411 includes ±8kV ESD protection on the headphone outputs. Com- prehensive click-and-pop circuitry suppresses audible clicks and pops on startup and shutdown. Independent left/right, low-power shutdown controls make it possible to optimize power savings in mixed-mode, mono/stereo applications. The MAX4411 operates from a single 1.8V to 3.6V supply, consumes only 5mA of supply current, has short-circuit and thermal-overload protection, and is specified over the extended -40°C to +85°C temperature range. The MAX4411 is available in a tiny (2mm ✕ 2mm ✕ 0.6mm), 16-bump chip-scale package (UCSP™) and a 20-pin thin QFN package (4mm ✕ 4mm ✕ 0.8mm).

DS1306 is a Maxim company's IC chip with a real-time clock (RTC) and 96-byte non-volatile memory (NV RAM) that can count seconds, minutes, hours, day of the month, month, day of the week, year, and support Leap-Year compensation, valid up to 2100.

The MAX9701 stereo Class D audio power amplifier provides Class AB amplifier audio performance with the benefits of Class D efficiency, eliminating the need for a heatsink while extending battery life. The MAX9701 delivers up to 1.3W per channel into an 8Ω load while offering 87% efficiency. Maxim's next-generation, low-EMI modulation scheme allows the amplifier to operate without an external LC filter while still meeting FCC EMI emission levels. The MAX9701 offers two modulation schemes: a fixed-frequency (FFM) mode, and a spread-spectrum (SSM) mode that reduces EMI-radiated emissions. The MAX9701 oscillator can be synchronized to an external clock through the SYNC input, allowing synchronization of multiple Maxim Class D amplifiers. The sync output (SYNC_OUT) can be used for a master-slave application where more channels are required. The MAX9701 features a fully differential architecture, a full bridge-tied load (BTL) output, and comprehensive click-and-pop suppression. The device features internally set gains of 0dB, 6dB, 12dB, and 18dB selected through two gain-select inputs, further reducing external component count. The MAX9701 features high 80dB PSRR, less than 0.1% THD+N, and SNR in excess of 88dB. Short-circuit and thermal-overload protection prevent the device from being damaged during a fault condition. The MAX9701 is available in 24-pin thin QFN-EP (4mm x 4mm x 0.8mm), and 20-bump UCSP™ (2mm x 2.5mm x 0.6mm) packages. The MAX9701 is a high-efficiency, low-EMI Class D amplifier designed specifically for mobile device applications, enabling low power consumption and high audio quality.

The MAX5109 is a dual 8-bit D/A converter from TI. It uses the I2C interface and is powered by a single supply ranging from +2.7V to +5.25V. The maximum operating temperature is -40 to +85 degrees Celsius. The product has non-volatile registers, independent high and low reference voltage inputs, software controlled power down mode and software controlled mute mode.

The MAX881R is a low-noise, inverting power supply designed for biasing GaAsFET power amplifiers in portable wireless applications. It has an input voltage range of 2.5V to 5.5V and the output is preset at -2.0V or can be set to any voltage from -0.5V to (-VIN + 0.6V) using two resistors. It can deliver up to 4mA of current. The internal linear regulator also filters the output to 1mVp-p ripple and noise. Other features include a power-OK (POK) output that signals when the negative voltage is within 7.5% of its set point. It protects the GaAsFET by not allowing power to be applied to the GaAsFET’s drain until it is properly biased. The signal can be routed either to a microcontroller or directly to a switch at the GaAsFET drain. The MAX881R is available in a 10-pin µMAX package.