FastFET amplifiers keep the noise down
The first two of a new family of FastFET amplifiers from Analog Devices offer a balanced combination of specifications the company reckons were unavailable until now
The AD8034 and AD8065 combine wide supply voltage range, low input bias current and noise, low distortion, low voltage noise, low offset voltage and drift and rail-to-rail output. In addition, both products come in very small packaging, for use on even the most space-constrained boards. These performance levels at low cost are possible using Analog Devices' proprietary XFCB high-speed complementary bipolar process.
The AD8065 is a very high performance single voltage-feedback amplifier with FET inputs, with a dual version in development.
The AD8065 is noteworthy for its very low noise, at 6.5nV/rtHz and 5fA/rtHz, and very low distortion, -91dB SFDR at 1MHz.
The device operates at 150MHz with a slew rate of 180V/us.
The AD8065 also has superior DC performance, with an IB of 1pA typical, an offset voltage of 6uV typical, and a drift of less than 1mV/C.
The differential gain and phase errors are 0.01% and 0.02deg, with 0.1-dB flatness out to 7MHz, making the part ideal for video applications.
The AD8065 consumes 6.5mA supply current.
The AD8034 is a dual voltage feedback amplifier with FET inputs, with a single version in development.
The AD8034 is a lower priced version of the AD8065 offering similarly high performance while consuming only 3.3mA supply current maximum per amplifier.
With 80MHz bandwidth, slew rate of 80V/us, and low DC errors of 6mV offset voltage and 11nV/rtHz noise, the AD8034 offers significant performance improvements over other low-cost FET amplifiers.
A wide operating supply voltage range of 5 to 24V with rail-to-rail output add to the general usefulness of these amplifiers.
The AD8034 and AD8065 are sampling now and are available in very small SOIC-8, SOT23-5 and micro-SOIC packages.
The AD8034 and AD8065 are both priced at $1.59 per unit in 1000 piece quantities.
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