Maxim has extended its DirectDrive headphone amplifier series with the introduction of the MAX9721A/B/C devices. The MAX9721 operates from a 0,9 to 1,8 V single supply, allowing the device to be powered directly from a single AA or AAA battery.
These headphone amps employ a ground-referenced output from a single supply, eliminating the two bulky DC-blocking capacitors typically required between the amplifier and headphone. Eliminating the DC-blocking capacitors also improves the low-frequency response, allowing full-range audio reproduction - especially important for music playback.
The MAX9721 is ideal for single-cell portable audio equipment. Like Maxim's other DirectDrive headphone amps, it does not require a DC bias voltage to be applied to the headphone-jack ground pin, thus simplifying end-product design and reliability.
An 80 dB at 1 kHz power-supply rejection ratio allows the devices to operate from noisy digital supplies without an additional linear regulator. They consume only 2,2 mA of supply current, has short-circuit and thermal-overload protection, and is specified over -40 to +85°C. Internal fixed gains of -2 V/V (MAX9721A), -1,5 V/V (MAX9721B), and -1 V/V (MAX9721C) further reduce external component count.
The devices deliver 20 mW per channel into a 32 Ω load with VDD of 1,5 V. The typical THD+N is 0,006% and the outputs include ±8 kV ESD protection. Comprehensive click-and-pop circuitry suppresses audible clicks and pops on start-up and shutdown. A low-power shutdown mode reduces supply current to 1,0 µA to extend battery life. The MAX9721 is available in a tiny 12-bump (1,54 x 2,02 x 0,6 mm) UCSP and a 12-pin (4 x 4 x 0,8 mm) TQFN package.
Infineon launches Edge Ai software solution Altron Arrow
Analogue, Mixed Signal, LSI
Infineon has introduced DEEPCRAFT, a new software solution category brand for Edge AI and machine learning, after the company recognised the huge potential of Edge AI for the market.
Read more...16-bit voltage output denseDAC Altron Arrow
Analogue, Mixed Signal, LSI
The AD5766 uses a versatile four-wire serial interface that operates at clock rates of up to 50 MHz for write mode, and is compatible with SPI, QSPI, MICROWIRE, and DSP interface standards.
Read more...Programmable power and data acquisition modules CST Electronics
DSP, Micros & Memory
TapBus programmable power supply, metering and I/O modules include pre-implemented communication interfaces, automatic addressing, encryption, and configurable access control.
Read more...AFE enables the software-defined factory Avnet Silica
Analogue, Mixed Signal, LSI
With its software configurable analogue inputs, where each input can be configured for voltage, current, resistance, or temperature, NXP’s N-AFE enables a new level of flexibility.
Read more...Easy monitoring of remote farm assets CST Electronics
Telecoms, Datacoms, Wireless, IoT
NeoCortec, providers of ultra-low-power bi-directional wireless mesh network hardware and software solutions, is working together with farmIT to enable easy monitoring of remote Australian farm assets.
Read more...Managed gigabit PoE switch CST Electronics
Telecoms, Datacoms, Wireless, IoT
The SISPM1040-582-LRT from Lantronix is a managed PoE++ switch suitable for connecting and powering devices in hardened environments.
Read more...High-performance GNSS module CST Electronics
Telecoms, Datacoms, Wireless, IoT
Simcom’s SIM66D-R can acquire and track any mix of multiple satellite signals, making it useful for determining position in mountainous and dense urban areas.
Read more...Precision voltage reference Altron Arrow
Analogue, Mixed Signal, LSI
The ADR1001 is a fully integrated, ultra-low drift, buried Zener precision voltage reference solution in a single chip.
Read more...Microphones enable low-power always-on state Avnet Abacus
Analogue, Mixed Signal, LSI
TDK Corporation has announced its InvenSense SmartSound T5848 I2S microphones to enable intelligent keyword, voice command, and sound detection at ultra-low power.
Read more...Low power, low-noise amplifier Altron Arrow
Analogue, Mixed Signal, LSI
The ADL8141 is a low power consumption, low-noise amplifier that operates from 14 to 24 GHz, and draws a supply current of 25 mA from a 2 V supply.
printer friendly version