VCA2615
- VERY LOW NOISE: 0.7nV/Hz
- LOW-NOISE PREAMP (LNP)
- Active Termination
- Programmable Gains: 3, 12, 18, 22dB
- Programmable Input Impedance (RF)
- Buffered, Differential Outputs for CW Processing
- Excellent Input Signal Handling Capabilities
- LOW-NOISE VARIABLE-GAIN AMPLIFIER
- High/Low-Mode (0/+6dB)
- 52dB Gain Control Range
- Linear Control Response: 22dB/V
- Switchable Differential Inputs
- Adjustable Output Clipping-Level
- BANDWIDTH: 42MHz
- HARMONIC DISTORTION: –55dB
- 5V SINGLE SUPPLY
- LOW-POWER: 154mW/Channel
- POWER-DOWN MODES
- APPLICATIONS
- MEDICAL AND INDUSTRIAL ULTRASOUND SYSTEMS
- Suitable for 10-Bit and 12-Bit Systems
- TEST EQUIPMENT
- MEDICAL AND INDUSTRIAL ULTRASOUND SYSTEMS
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The VCA2615 is a dual-channel, variable gain amplifier consisting of a Low-Noise Preamplifier (LNP) and a Variable-Gain Amplifier (VGA). This combination along with the device features makes it well-suited for a variety of ultrasound systems.
The LNP offers a high level of flexibility to adapt to a wide range of systems and probes. The LNP gain can be programmed to one of four settings (3dB, 12dB, 18dB, 22dB), while maintaining excellent noise and signal handling characteristics. The input impedance of the LNP can be controlled by selecting one of the built-in feedback resistors. This active termination allows the user to closely match the LNP to a given source impedance, resulting in optimized overall system noise performance. The differential LNP outputs are provided either as buffered outputs for further CW processing, or fed directly into the variable-gain amplifier (VGA). Alternatively, an external signal can be applied to the differential VGA inputs through a programmable switch.
Following a linear-in-dB response, the gain of the VGA can be varied over a 52dB range with a 0.2V to 2.5V control voltage common to both channels of the VCA2615. In addition, the overall gain can be switched between a 0dB and +6dB postgain, allowing the user to optimize the output swing of VCA2615 for a variety of high-speed Analog-to-Digital Converters (ADCs). As a means to improve system overload recovery time, the VCA2615 provides an internal clipping function where an externally applied voltage sets the desired clipping level.
The VCA2615 operates on a single +5V supply and is available in a small QFN-48 (7×7mm) or TQFP package.
技術資料
種類 | タイトル | 最新の英語版をダウンロード | 日付 | |||
---|---|---|---|---|---|---|
* | データシート | Dual, Low-Noise Variable-Gain Amplifier with Preamp データシート (Rev. D) | 2008年 5月 6日 | |||
ユーザー・ガイド | Ultrasound Receive Chain Demonstration Platform User's Guide | 2005年 12月 16日 | ||||
EVM ユーザー ガイド (英語) | VCA2615EVM User's Guide | 2005年 10月 25日 |
設計および開発
その他のアイテムや必要なリソースを参照するには、以下のタイトルをクリックして詳細ページをご覧ください。
VCA2615EVM — VCA2615 評価基板
The VCA2615 is a dual-channel, variable gain amplifier, combining a low-noise preamplifier (LNP) and a voltage-controlled amplifier. The VCA2615EVM evaluation module is designed to allow for a quick setup and ease of use in evaluating the performance. Various modes of operation can be configured, (...)
PSPICE-FOR-TI — TI Design / シミュレーション・ツール向け PSpice®
設計とシミュレーション向けの環境である PSpice for TI (...)
TINA-TI — SPICE ベースのアナログ・シミュレーション・プログラム
TINA-TI をインストールするには、約 500MB が必要です。インストールは簡単です。必要に応じてアンインストールも可能です。(そのようなことはないと思いますが)
TINA は DesignSoft (...)
パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
---|---|---|
TQFP (PFB) | 48 | Ultra Librarian |
VQFN (RGZ) | 48 | Ultra Librarian |
購入と品質
- RoHS
- REACH
- デバイスのマーキング
- リード端子の仕上げ / ボールの原材料
- MSL 定格 / ピーク リフロー
- MTBF/FIT 推定値
- 使用原材料
- 認定試験結果
- 継続的な信頼性モニタ試験結果
- ファブの拠点
- 組み立てを実施した拠点