OPA684
- MINIMAL BANDWIDTH CHANGE VERSUS GAIN
- > 120MHz BANDWIDTH TO GAIN > +10
- LOW DISTORTION: < –78dBc at 5MHz
- HIGH OUTPUT CURRENT: 120mA
- SINGLE +5V TO +12V SUPPLY OPERATION
- DUAL ±2.5 TO ±6.0V SUPPLY OPERATION
- LOW SUPPLY CURRENT: 1.7mA
- LOW SHUTDOWN CURRENT: 100µA
- APPLICATIONS
- LOW-POWER BROADCAST VIDEO DRIVERS
- EQUALIZING FILTERS
- SAW FILTER HIGH GAIN POST AMPLIFIERS
- MULTICHANNEL SUMMING AMPLIFIERS
- PROFESSIONAL CAMERAS
- ADC INPUT DRIVERS
All trademarks are the property of their respective owners.
The OPA684 provides a new level of performance in low-power, wideband, current-feedback (CFB) amplifiers. This CFBplus amplifier is the first to use an internally closed-loop input buffer stage that enhances performance significantly over earlier low-power CFB amplifiers. While retaining the benefits of very low power operation, this new architecture provides many of the benefits of a more ideal CFB amplifier. The closed-loop input stage buffer gives a very low and linearized impedance path at the inverting input to sense the feedback error current. This improved inverting input impedance retains exceptional bandwidth to much higher gains and improves harmonic distortion over earlier solutions limited by inverting input linearity. Beyond simple high-gain applications, the OPA684 CFBplus amplifier permits the gain setting element to be set with considerable freedom from amplifier bandwidth interaction. This allows frequency response peaking elements to be added, multiple input inverting summing circuits to have greater bandwidth, and low-power line drivers to meet the demanding requirements of studio cameras and broadcast video.
The output capability of the OPA684 also sets a new mark in performance for low-power current feedback amplifiers. Delivering a full ±4Vpp swing on ±5V supplies, the OPA684 also has the output current to support this swing into a 100
load. This minimal output headroom requirement is complemented by a similar 1.2V input stage headroom giving exceptional capability for single +5V operation.
The OPA684’s low 1.7mA supply current is precisely trimmed at 25°C. This trim, along with low shift over temperature and supply voltage, gives a very robust design over a wide range of operating conditions. System power may be further reduced by using the optional disable control pin. Leaving this disable pin open, or holding it HIGH, gives normal operation. If pulled LOW, the OPA684 supply current drops to less than 100µA while the I/O pins go to a high impedance state.
技術資料
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表示してください。
DEM-OPA-SO-1A — SO-8 パッケージ封止、シングル・オペアンプの評価基板
The DEM-OPA-SO-1A demonstration fixture helps designers evaluate the operation and performance of TI's High Speed, Wide Bandwidth Operational Amplifiers. This unpopulated PC board is compatible with products offered in the 8-lead SOIC (D) package.
DEM-OPA-SOT-1A — Single op amp evaluation module for SOT23-5/6 package
The DEM-OPA-SOT-1A is a demonstration fixture that helps designers evaluate the operation and performance of TI's High Speed, Wide Bandwidth Operational Amplifiers. This unpopulated PC board is compatible with products offered in the SOT(DBV) package.
OPA684 TINA-TI Reference Design (Rev. B)
ANALOG-ENGINEER-CALC — アナログ技術者向けカリキュレータ
VOLT-DIVIDER-CALC — ボルテージ・デバイダは、電圧分割の為の抵抗のセットで決まります。
(...)
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 (...)
TIDA-00066 — 高ゲイン・マルチステージ・アンプ用リファレンス・デザイン
| パッケージ | ピン数 | ダウンロード |
|---|---|---|
| SOIC (D) | 8 | オプションの表示 |
| SOT-23 (DBV) | 6 | オプションの表示 |
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 rating / リフローピーク温度
- MTBF/FIT 推定値
- 材料 (内容)
- 認定試験結果
- 継続的な信頼性モニタ試験結果