Analog Devices AD5760/AD9642 converter range

A pair of converters from Analog Devices is the latest addition to the company’s range of digital-to-analog and analog-to-digital converters.

The AD5760 is a single 16-bit, unbuffered voltage output DAC that operates from a bipolar supply of up to 33 V. The device accepts a positive reference input range of 5 V to VDD-2.5 and a negative reference input range of VSS+2.5 to 0 V.

It offers a relative accuracy specification of ±0.5 LSB maximum and operation is guaranteed monotonic with a ±0.5 LSB DNL maximum specification.

Key features include: true 16-bit voltage output DAC, ±0.5 LSB INL (B version) or ±2.0 LSB INL (A version); 8 nV/√Hz output noise spectral density; 0.00625 LSB long-term linearity error stability; ±0.018 ppm/°C gain error temperature coefficient; 2.5 μs output voltage settling time; 3.5 nV-s midscale glitch impulse; integrated precision reference buffers; operating temperature range: −40 to +125°C; 4 × 5 mm LFCSP package; wide power supply range of up to ±16.5 V; 35 MHz Schmitt triggered digital interface; 1.8 V-compatible digital interface.

The AD9642 is a 14-bit ADC with sampling speeds of 170, 210 or 250 MSPS. The device is designed to support communications applications, where low cost, small size, wide bandwidth and versatility are desired.

The ADC core features a multistage, differential pipelined architecture with integrated output error correction logic. The device offers wide bandwidth inputs that can support a variety of user-selectable input ranges.

An integrated voltage reference eases design considerations. A duty cycle stabiliser is provided to compensate for variations in the ADC clock duty cycle, allowing the converter to maintain good performance.

Key features include: SNR = 71.0 dBFS at 185 MHz AIN and 250 MSPS; SFDR = 83 dBc at 185 MHz AIN and 250 MSPS; −152.0 dBFS/Hz input noise at 200 MHz, −1 dBFS AIN, 250 MSPS; total power consumption 390 mW at 250 MSPS; 1.8 V supply; LVDS (ANSI-644 levels) outputs; integer 1-to-8 input clock divider (625 MHz maximum input); sample rates of up to 250 MSPS; IF sampling frequencies of up to 350 MHz; internal ADC voltage reference; flexible analog input range; 1.4 to 2.0 V p-p (1.75 V p-p nominal); ADC clock duty cycle stabiliser; serial port control; energy saving power-down modes; user-configurable, built-in self-test (BIST) capability.