Product Details
●The AD8336 is a low noise, single-ended, linear in dB, general-purpose 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 AD8336 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 AD8336 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.
●Applications
● Industrial process controls
● High performance AGC systems
● I/Q signal processing
● Video
● Industrial and medical ultrasound
● Radar receivers
●### Features and Benefits
● Low noise
● Voltage noise: 3 nV/√Hz
● Current noise: 3 pA/√Hz
● Small-signal BW: 115 MHz
● Large-signal BW: 2 V p-p = 80 MHz
● Slew rate: 550 V/μs, 2 V p-p
● Gain ranges (specified)
● −14 dB to +46 dB
● 0 dB to 60 dB
● Gain scaling: 50 dB/V
● DC-coupled
● Single-ended input and output
● Supplies: ±3 V to ±12 V
● Temperature range: −55°C to +125°C
● Power
● 150 mW at ±3 V, −55°C < T < +125°C
● 84 mW at ±3 V, PWRA = 3 V
