VCA8500IRGCT
Active8-CHANNEL, ULTRA-LOW POWER VARIABLE GAIN AMPLIFIER WITH LOW-NOISE PRE-AMP
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VCA8500IRGCT
Active8-CHANNEL, ULTRA-LOW POWER VARIABLE GAIN AMPLIFIER WITH LOW-NOISE PRE-AMP
Technical Specifications
Parameters and characteristics for this part
| Specification | VCA8500IRGCT |
|---|---|
| -3db Bandwidth | 55 MHz |
| Current - Output / Channel | 20 mA |
| Current - Supply | 10 µA |
| Gain Bandwidth Product | 15 MHz |
| Mounting Type | Surface Mount |
| Number of Circuits [custom] | 8 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Output Type | Differential |
| Package / Case | 64-VFQFN Exposed Pad |
| Supplier Device Package | 64-VQFN (9x9) |
| Voltage - Input Offset | 1 mV |
| Voltage - Supply Span (Max) [Max] | 5.25 V |
| Voltage - Supply Span (Min) [Min] | 3.15 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 54.20 | |
| Digi-Reel® | 1 | $ 54.20 | ||
| Tape & Reel (TR) | 250 | $ 44.35 | ||
| Texas Instruments | SMALL T&R | 1 | $ 49.76 | |
| 100 | $ 44.23 | |||
| 250 | $ 36.36 | |||
| 1000 | $ 32.52 | |||
Description
General part information
VCA8500 Series
The VCA8500 is an 8-channel variable gain amplifier consisting of a low-noise pre-amplifier (LNP) and a variable-gain amplifier (VGA). This combination, along with the device features, makes it ideal for a variety of ultrasound systems.
The LNP gain is fixed at 20dB, and has excellent noise and signal handling characteristics. The gain of the voltage-controlled attenuator can vary over a 46dB range with a 0V to 1.2V control voltage common to all channels of the VCA8500.
The post-gain amplifier (PGA) can be programmed for four gain settings: 20dB, 25dB, 27dB, or 30dB gain. As a means to improve system overload recovery time, the VCA8500 provides an internal clamping function. The PGA settings as well the clamp levels are controlled through the serial interface.
Documents
Technical documentation and resources