Analog Devices

The AD74111 is a front-end processor for general purpose audio and voice applications. It features a multi-bit Sigma-Delta A/D conversion channel and a multi-bit Sigma-Delta D/A conversion channel. The ADC channel provides >67 dB THD+N and the DAC channel provides >88 dB THD+N both over an audio signal bandwidth.The AD74111 is particularly suitable for a variety of applications where mono input and output channels are required, including audio sections of Digital Video Camcorders, portable personal audio devices and telematic applications. Its high quality performance also make it suitable for speech and telephony applications such as speech recognition and synthesis and modern feature phones.An on-chip reference voltage is included but can be overdriven by an external reference source if required.The AD74111 offers sampling rates which, depending on MCLK selection and MCLK divider ratio, range from 8 kHz in the voiceband range to 48 kHz in the audio range.The AD74111 is available in 16 lead TSSOP package option and is specified for the automotive temperature range of -40°C to +105°C.APPLICATIONSDigital Video Camcorders (DVC)Portable Audio Devices (Walkman®, PDAs, and so on)Audio ProcessingVoice ProcessingTelematic SystemsGeneral-Purpose Analog I/O

The AD74115H is a single-channel, software-configurable, input and output device for industrial control applications. The AD74115H provides a wide range of use cases, integrated on a single chip. These use cases include analog output, analog input, digital output, digital input, resistance temperature detector (RTD), and thermocouple measurement capability. The AD74115H also has an integrated HART modem. A serial peripheral interface (SPI) is used to handle all communications to the device, including communications with the HART modem. The digital input and digital outputs can be accessed via the SPI or the general-purpose input and output (GPIO) pins to support higher speed data rates.The device features a 16-bit, Σ-Δ analog-to-digital converter (ADC) and a 14-bit digital-to-analog converter (DAC). The AD74115H contains a high accuracy 2.5 V on-chip reference that can be used as the DAC and ADC reference.Power and isolation can be provided using the ADP1034 companion product. When using the ADP1034 and AD74115H together, programmable power control (PPC) is available on the positive analog supply, AVDD, which allows for an optimized power solution in the end application. An on-chip charge pump can be enabled if unipolar capability is required.APPLICATIONSIsolated industrial control systemsProcess controlFactory automationBuilding control systems

The AD7414/AD7415are complete temperature monitoring systems in 6-lead and 5-lead SOT-23 packages. They contain a band gap temperature sensor and a 10-bit ADC to monitor and digitize the temperature reading to a resolution of 0.25°C.The AD7414/AD7415 provide a 2-wire serial interface that is compatible with SMBus and I2C interfaces. The parts come in three versions: the AD7414/AD7415-0, AD7414/AD7415-1, and AD7414-3. The AD7414/AD7415-0 and AD7414/AD7415-1 versions provide a choice of three different SMBus addresses for each version. All four AD7414 versions give the possibility of eight different I2C addresses while the two AD7415 versions allow up to six I2C addresses to be used.The AD7414/AD7415’s 2.7 V supply voltage, low supply current, serial interface, and small package size make them ideal for a variety of applications, including personal computers, office equipment, cellular phones, and domestic appliances.In the AD7414, on-chip registers can be programmed with high and low temperature limits, and an open-drain overtemperature indicator output (ALERT) becomes active when a programmed limit is exceeded. A configuration register allows programming of the state of the ALERT output (active high or active low). This output can be used as an interrupt or as an SMBus alert.APPLICATIONSHard disk drives and personal computersElectronic test equipment and office equipmentDomestic appliances and cellular phonesProcess control

The AD744 is a fast-settling, precision, FET input, monolithic operational amplifier. It offers the excellent dc characteristics of the AD711 BiFET family with enhanced settling, slew rate, and bandwidth. The AD744 also offers the option of using custom compensation to achieve exceptional capacitive load drive capability.The single-pole response of the AD744 provides fast settling: 500 ns to 0.01%. This feature, combined with its high dc precision, makes it suitable for use as a buffer amplifier for 12-bit, 14-bit or 16-bit DACs and ADCs. Furthermore, the AD744's low total harmonic distortion (THD) level of 0.0003% and gain bandwidth product of 13 MHz make it an ideal amplifier for demanding audio applications. It is also an excellent choice for use in active filters in 12-bit, 14-bit and 16-bit data acquisition systems.The AD744 is internally compensated for stable operation as a unity gain inverter or as a noninverting amplifier with a gain of two or greater. External compensation may be applied to the AD744 for stable operation as a unity gain follower. External compensation also allows the AD744 to drive 1000 pF capacitive loads, slewing at 10 V/µs with full stability.Alternatively, external decompensation may be used to increase the gain bandwidth of the AD744 to over 200 MHz at high gains. This makes the AD744 ideal for use as ac preamps in digital signal processing (DSP) front ends.The AD744 is available in seven performance grades. The AD744J and AD744K are rated over the commercial temperature range of 0°C to +70°C. The AD744A, AD744B and AD744C are rated over the industrial temperature range of -40°C to +85°C. The AD744S and AD744T are rated over the military temperature range of -55°C to +125°C and are available processed to MIL-STD-883B, Rev. C.Extended reliability PLUS screening is available, specified over the commercial and industrial temperature ranges. PLUS screening includes a 168-hour burn-in, as well as other environmental and physical tests.The AD744 is available in an 8-pin plastic mini-DIP, 8-pin small outline, 8-pin cerdip or TO-99 metal can.

The AD7440 /AD7450Aare 10-bit and 12-bit high speed, low power, successive approximation (SAR) analog-to-digital converters with a fully differential analog input. These parts operate from a single 3 V or 5 V power supply and use advanced design techniques to achieve very low power dissipation at throughput rates up to 1 MSPS. The SAR architecture of these parts ensures that there are no pipeline delays.The parts contain a low noise, wide bandwidth, differential track-and-hold amplifier (T/H) that can handle input frequencies up to 3.5 MHz. The reference voltage is applied externally to the VREFpin and can be varied from 100 mV to 3.5 V depending on the power supply and what suits the application. The value of the reference voltage determines the common-mode voltage range of the part. With this truly differential input structure and variable reference input, the user can select a variety of input ranges and bias points.The conversion process and data acquisition are controlled usingCSand the serial clock, allowing the device to interface with microprocessors or DSPs. The input signals are sampled on the falling edge ofCS; the conversion is also initiated at this point. The SAR architecture of these parts ensures that there are no pipeline delays. The AD7440 and the AD7450A use advanced design techniques to achieve very low power dissipation at high throughput rates.PRODUCT HIGHLIGHTSOperation with either 3 V or 5 V power supplies.High throughput with low power consumption.With a 3 V supply, the AD7440/AD7450A offer 4 mW max power consumption for 1 MSPS throughput.Fully differential analog input.Flexible power/serial clock speed management.The conversion rate is determined by the serial clock, allowing the power to be reduced as the conversion time is reduced through the serial clock speed increase. These parts also feature a shutdown mode to maximize power efficiency at lower throughput rates.Variable voltage reference input.No pipeline delay.Accurate control of the sampling instant via aCSinput and once-off conversion control.ENOB > eight bits typically with 100 mV reference.APPLICATIONSTransducer interfaceBattery-powered systemsData acquisition systemsPortable instrumentationMotor control