Check the listing for details. AD603 80dB Variable Gain Amplifier Voltage-Controlled Adjustable VCA Module. Condition: New. Listed at 18.86 USD. AD603 80dB Variable Gain Amplifier Voltage-Controlled Adjustable VCA ModuleDescriptionA, AD603 chip introduction The AD603 is a low noise, voltage controlled amplifier for radio frequency (RF) and intermediate frequency (IF) automatic gain control (AGC) systems. It provides accurate pin selectable gains from −11 dB to +31 dB at 90 MHz bandwidth and +9 dB to +51 dB at 9 MHz bandwidth. Use an external resistor to obtain any intermediate gain range. The input referred noise spectral density is only 1.3 nV/√Hz, and the power consumption is 125 mW with the recommended ±5 V power supply. The gain is linear in dB and is precisely calibrated and does not change with temperature and supply voltage. The gain is controlled by a high-impedance (50 MΩ), low-bias (200 nA) differential input; the scale factor is 25 mV/dB, so only 1 V of gain control voltage is needed to cover the mid-range of 40 dB of the gain range. Regardless of the range chosen, 1 dB over-range and under-range are available. For a 40 dB change, the gain control response time is less than 1 μs. The differential gain control interface allows differential or single-ended positive or single-ended negative control voltages. Several such amplifiers can be cascaded with their gain control gain bias to optimize the system signal-to-noise ratio (SNR). The AD603 can drive load impedances as low as 100 Ω with low distortion. For a 500 Ω load with a 5 pF shunt, the total harmonic distortion of a ±1 V sine output is typically −60 dBc at 10 MHz. The peak rated output into a 500 Ω load is ±2.5 V (minimum). The AD603 uses a proprietary, patented circuit structure, X-AMP®. The X-AMP contains a 0 dB to -42.14 dB variable attenuator followed by a fixed gain amplifier. Due to the presence of an attenuator, the amplifier never has to process a large input, and negative feedback can be used to define its (fixed) gain and dynamic performance. The attenuator has a 100 Ω input resistor that is laser trimmed to ±3% and contains a 7-stage R-2R ladder network, which provides a 6.021 dB attenuation between contacts. Using proprietary interpolation techniques, linear continuous gain control in dB is available. The AD603 has an operating temperature range of −40°C to +85°C. Two or Two Stage AD603-VCA (Voltage Control Gain) Module 1, the work of gain and frequency range: (see the schematic diagram of the specific configuration) -11dB -- +31dB 90MHz Bandwidth 9dB ​​-- +51dB 9MHz Bandwidth -1dB -- +41dB 30MHz Bandwidth (default configuration mode, this is a Level 1 parameter) 2, the maximum gain can be amplified to 1000 times the small signal without distortion, the maximum power supply is ± 7.5V DC 3, 100MHz bandwidth, flatness test (maximum gain flatness less than 3dB in 30MHz)Package List:- 1pc module as frist picture show ShippingItem will be shipped within 24 -48 hours after full payment is received.Normally the shippment to worldwide is used to take 25 to 30 business days, exclude Sat & Sun.PaymentWe accept PayPal only.Payment must be received in 7 business days of auction closing.Please leave note for your special request (e.g. Colors or Size) in ebay note when you pay the order.Any special request cannot be accepted after 24 hours of payment,because most of orders will be processed instantly and same day dispatched.Contact UsIf you have any questions, please feel free to email our servicer ，and we will reply you ASAP. If no response within 24 Hours, please check the spam of mail box or kindly re-send it to us.We greatly appreciate your POSITIVE feedback. Please do NOT leave negative or neutral feedback without any contact. If you haven't received item in 45 days, please contact us and we will arrange refund or resend Feedback Customer satisfaction is very important to us. If you have any problem with your order,please contact us and we will do our best to make you satisfied, please do not leave a negative feedback before we resolve your problem. We guarantee that your issue will be solved quickly.As long as you are happy with your purchase of , please leave us a positive feedback. Your feedback is very important to us it affects our search placement on eBay. We will leave a positive feedback for you in return automatically once we receive your feedback