AD8310ARMZ Logarithmic Detectors by Analog Devices

Semiconductors - ICs
> Amplifiers & Comparators
> Logarithmic Amplifiers
Status: Production
Series: AD8310
RoHS: Compliant
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The AD8310 is a complete, dc to 440 MHz demodulating logarithmic amplifier (log amp) with a very fast voltage mode output, capable of driving up to 25 mA into a grounded load in under 15 ns. It uses the progressive compression (successive detection) technique to provide a dynamic range of up to 95 dB to ±3 dB law conformance or 90 dB to a ±1 dB error bound up to 100 MHz. It is extremely stable and easy to use, requiring no significant external components. A single-supply voltage of 2.7 V to 5.5 V at 8 mA is needed, corresponding to a power consumption of only 24 mW at 3 V. A fast-acting CMOS-compatible enable pin is provided.Each of the six cascaded amplifier/limiter cells has a small-signal gain of 14.3 dB, with a −3 dB bandwidth of 900 MHz. A total of nine detector cells are used to provide a dynamic range that extends from −91 dBV (where 0 dBV is defined as the amplitude of a 1 V rms sine wave), an amplitude of about ±40 μV, up to +4 dBV (or ±2.2 V). The demodulated output is accurately scaled, with a log slope of 24 mV/dB and an intercept of −108 dBV. The scaling parameters are supply- and temperature-independent.The fully differential input offers a moderately high impedance (1 kΩ in parallel with about 1 pF). A simple network can match the input to 50 Ω and provide a power sensitivity of −78 dBm to +17 dBm. The logarithmic linearity is typically within ±0.4 dB up to 100 MHz over the central portion of the range, but it is somewhat greater at 440 MHz. There is no minimum frequency limit; the AD8310 can be used down to low audio frequencies. Special filtering features are provided to support this wide range.The output voltage runs from a noise-limited lower boundary of 400 mV to an upper limit within 200 mV of the supply voltage for light loads. The slope and intercept can be readily altered using external resistors. The output is tolerant of a wide variety of load conditions and is stable with capacitive loads of 100 pF.The AD8310 provides a unique combination of low cost, small size, low power consumption, high accuracy and stability, high dynamic range, a frequency range encompassing audio to UHF, fast response time, and good load-driving capabilities, making this product useful in numerous

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Features

Multistage demodulating logarithmic amplifier
Voltage output, rise time <15 ns
High current capacity: 25 mA into grounded RL
95 dB dynamic range: –91 dBV to +4 dBV
Single supply of 2.7 V min at 8 mA typ
DC to 440 MHz operation, ±0.4 dB linearity
Slope of +24 mV/dB, intercept of –108 dBV
Highly stable scaling over temperature
Fully differential dc-coupled signal path
100 ns power-up time, 1 mA sleep current

Alternative Descriptions

uSOIC 500MHz 92dB Log Detector | Analog Devices
AD8310 logarithmic 440 MHz SMT amplifier | RS
Logarithmic Amplifier, 1.5Mv, 20Ns, Msop | Newark Electronics
AMPLIFIER - SPECIAL PURPOSE | Richardson RFPD
LOGARITHMIC AMPLIFIER, 1.5MV, 20NS, MSOP | Farnell

Frequently Asked Questions

Where can I find additional details, specifications and documents for a AD8310ARMZ?

Additional datasheets, footprints and schematics for AD8310ARMZ are listed on our Part Details page. You can also find images and similar parts to AD8310ARMZ on this page.

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What category does AD8310ARMZ fall under?

The AD8310ARMZ is listed under Logarithmic Detectors.

Can I view similar or alternative parts?

You can view similar parts to AD8310ARMZ when available in the Logarithmic Detectors range under the specifications section at the bottom of the details page.

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Is the AD8310ARMZ RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Analog Devices.

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Authorised distributors including Analog Devices, Chip One Stop, CoreStaff, RS and Newark Electronics have stock available or on a lead time for AD8310ARMZ.

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