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VCA8500

Features: ` Ultra-low Power: 63mW/Channel` Low Noise: 0.8nV/Hz` Low-Noise Pre-amp (LNP): 20dB Fixed Gain 250mVPP Linear Input Range` Variable Gain Amplifier: Gain Control Range: 45dB Selectable PGA Gain: 20dB, 25dB, 27dB, 30dB Fast Overload Recovery Output Clamping Control` Integrated Low-Pass Fil...

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SeekIC No. : 004540770 Detail

VCA8500: Features: ` Ultra-low Power: 63mW/Channel` Low Noise: 0.8nV/Hz` Low-Noise Pre-amp (LNP): 20dB Fixed Gain 250mVPP Linear Input Range` Variable Gain Amplifier: Gain Control Range: 45dB Selectable PGA ...

VCA8500 Data Sheet

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Part Number:
VCA8500
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

` Ultra-low Power: 63mW/Channel
` Low Noise: 0.8nV/Hz
` Low-Noise Pre-amp (LNP):
20dB Fixed Gain
250mVPP Linear Input Range
` Variable Gain Amplifier:
Gain Control Range: 45dB
Selectable PGA Gain: 20dB, 25dB, 27dB, 30dB
Fast Overload Recovery
Output Clamping Control
` Integrated Low-Pass Filter:
Second-Order, Linear Phase
Bandwidth: 10MHz, 15MHz
` High Accuracy:
Low Gain Error: ±0.25 dB
Excellent Channel Matching: ±0.5dB
` Distortion, HD2: 50dBc at 5MHz
` Integrated CW Switch Matrix:
Easy Current Summing
` Serial Control Interface
` Small Package: QFN-64, 9*9 mm


Application

` Medical Imaging, Ultrasound Systems
Portable Systems
Low-, Mid-Range Systems


Specifications

PARAMETER VCA8500 UNIT
Input voltage range(2) 0.3 to AVDD to +0.3
0.3 to AVDD to +0.3
0.3 to DVDD to +0.3		 V
V
V
Voltage range at (tbd) TBD V
Voltage on outputs 0.3 to AVDD to +0.3
0.3 to DVDD to +0.3		 V
V
Peak output current Internally limited
ESD rating, HBM
ESD rating, CDM		 2k
500		 V
V
Operating virtual junction temperature range, TJ
Operating ambient temperature range, TA
Storage temperature range, Tstg		 40 to +150
40 to +85
65 to +150




Description

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 45-dB 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.

The VCA8500 is built on TI's BiCOM process and is available in a small, 64-pin QFN PowerPAD™ package




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