High-speed differential amplifier

21 January 2009 Analogue, Mixed Signal, LSI

Analog Devices recently introduced a high-speed differential amplifier that delivers a combination of high performance, low noise and reduced power consumption for engineers driving high-gain ADCs (analog-to-digital converters) in power-sensitive communications and instrumentation systems. Drawing very little current, the ADA4927 achieves greater than 80 dB SFDR (spurious-free dynamic range) at a gain of 10. Even at such high gain, the device’s current feedback architecture allows it to maintain performance over an input bandwidth range of DC to more than 100 MHz.

The device can be used in single-ended-to-differential and differential-to-differential configurations and is optimised for driving high-performance 14- and 16-bit converters. It is especially well suited to wireless communications applications as well as medical equipment and defence electronics that use low IF (intermediate frequency) and baseband signal processing at frequencies up to 100 MHz, and where 14- and 16-bit accuracy is required. The two-channel version, the ADA4927-2, is suitable for driving dual ADCs used in I/Q demodulation schemes and offers low cross-talk of -80 dB at 100 MHz while providing gain and phase matching.

The internal common-mode feedback loop of the ADA4927 allows the user to independently adjust the output common-mode level to match the input common-mode voltage of the ADC, while achieving good output balance and suppression of even-order harmonics.

The device achieves low levels of distortion with an input voltage noise of 2,3 nV/rt Hz, as well as -3 dB bandwidth of 1,4 GHz and a slew rate of 5000 V/μs. Consuming less than 120 mW from a single 3,3 V supply, it is specified to operate over the -40°C to +105°C temperature range for both 3,3 V and 5 V operation.

Further reading:

Smart IMU for high/low-g acceleration
Altron Arrow Analogue, Mixed Signal, LSI
The ISM6HG256X is a 6-axis intelligent inertial measurement unit that enables smart motion sensing, edge computing, and real-time awareness.

Read more...

---

Compact Schottky diodes increase efficiency
RS South Africa Analogue, Mixed Signal, LSI
Gen 3 SiC Schottky diodes from Vishay in the compact SlimSMA HV package increase efficiency while enhancing electrical insulation.

Read more...

---

Silanna launches Plural ADC EVKs
Analogue, Mixed Signal, LSI
Silanna Semiconductor has released its first evaluation kits for the Plural data converter family to offer the fastest, most cost-effective way to evaluate and deploy high-performance ADCs.

Read more...

---

High speed, low noise 2 A driver
iCorp Technologies Analogue, Mixed Signal, LSI
The SGM8423-2A from SGMICRO is a high efficiency, class AB, low distortion power line driver optimised to accept a signal from a Power Line Carrier modem.

Read more...

---

Online sensor technology hub
Analogue, Mixed Signal, LSI
Mouser’s sensor content hub offers an extensive collection of articles, blogs, eBooks, and product information from its technical experts and leading manufacturing partners.

Read more...

---

Ultra-low power MEMS accelerometer
Altron Arrow Analogue, Mixed Signal, LSI
Analog Devices’ ADXL366 is an ultra-low power, 3-axis MEMS accelerometer that consumes only 0,96 µA at a 100 Hz output data rate and 191 nA when in motion-triggered wake-up mode.

Read more...

---

BT Audio 4 Click board
Dizzy Enterprises Analogue, Mixed Signal, LSI
The BT Audio 4 Click board from MIKROE provides high-quality wireless audio streaming and data comms over Bluetooth.

Read more...

---

Precision MEMS IMU modules
Altron Arrow Analogue, Mixed Signal, LSI
The ADIS16575/ADIS16576/ADIS16577 from Analog Devices are precision, MEMS IMUs that includes a triaxial gyroscope and a triaxial accelerometer.

Read more...

---

MEMS with embedded AI processing
Altron Arrow Analogue, Mixed Signal, LSI
STMicroelectronics has announced an inertial measurement unit that combines sensors tuned for activity tracking and high-g impact measurement into a single, space-saving package.

Read more...

---

High-performance IMU
RS South Africa Analogue, Mixed Signal, LSI
TDK Corporation has announced availability of the new InvenSense SmartMotion ICM-536xx family of high-performance 6-axis IMUs.

Read more...

---