AD8336ACPZ-R7 Integrated Circuits (ICs)

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1. DESCRIPTION

The AD8336ACPZ-R7 is a low noise, single-ended, linear in dB, generalpurpose variable gain amplifier, usable over a large range of supply voltages. It features an uncommitted preamplifier with a usable gain range of 6 dB to 26 dB. The VGA gain range is 0 dB to 60 dB, with absolute gain limits of −26 dB to +34 dB. When the preamplifier gain is adjusted for 12 dB, the combined 3 dB bandwidth of the preamplifier and VGA is 100 MHz, and the amplifier is fully usable to 80 MHz. With ±5 V supplies, the maximum output swing is 7 V p-p. Because of the X-AMP® architecture, frequency response is maintained across the entire gain range of the VGA. The differential gain control interface provides precise linear in dB gain scaling of 50 dB/V over the temperature span of −55°C to +125°C and is simple to interface with a variety of external sources. The large supply voltage range makes the AD8336ACPZ-R7 suited for industrial medical applications and video circuits. Dual-supply operation enables bipolar input signals, such as those generated by photodiodes or photomultiplier tubes. The fully independent voltage feedback preamplifier allows both inverting and noninverting gain topologies. The AD8336ACPZ-R7 can be used within the specified gain range of −14 dB to +60 dB by selecting a preamplifier gain between 6 dB and 26 dB and choosing appropriate feedback resistors. For the nominal preamplifier gain of 4×, the overall gain range is −14 dB to +46 dB. If required, quiescent power is limited to a safe level by asserting the PWRA pin.

2. FEATURES

    1. Low noise

        - Voltage noise: 3 nV/√Hz

        - Current noise: 3 pA/√Hz

    2. Small-signal BW: 115 MHz

    3. Large-signal BW: 2 V p-p = 80 MHz

    4. Slew rate: 550 V/µs, 2 V p-p

    5. Gain ranges (specified)

        - −14 dB to +46 dB

        - 0 dB to 60 dB

        - Gain scaling: 50 dB/V

    6. DC-coupled

    7. Single-ended input and output

    8. Supplies: ±3 V to ±12 V

    9. Temperature range: −55°C to +125°C Power

  10. 150 mW at ±3 V, −55°C < T < +125°C

  11. 84 mW at ±3 V, PWRA = 3 V

3. APPLICATIONS

    1. Industrial process controls

    2. High performance AGC systems

    3. I/Q signal processing

    4. Video

    5. Industrial and medical ultrasound

    6. Radar receivers