LM2904TH-13 - Dual 700 kHz Op Amp | Diodes Incorporated
MPN： LM2904TH-13 ✓ 啟用中LM2904TH-13 概覽
An operational amplifier, commonly called an op amp, is a high-gain DC-coupled analog amplifier whose behavior is controlled by feedback around the device. The LM2904 combines two independent amplifier channels in one package, reducing board area compared with two separate single-amplifier devices. Its 8-pin TSSOP package supports compact surface-mount assemblies and exposes supply, input, and output connections for each channel.
The most prominent specified characteristics are the two-amplifier configuration, 700 kHz bandwidth, and supply capability extending to ±18 V, equivalent to a 36 V total span. The device is categorized as a standard general-purpose amplifier and is designed for both single-power-supply and split-supply operation. Its architecture also targets low input-offset voltage, making it relevant to closed-loop amplifier and comparator-style signal-processing applications when configured appropriately.
The LM2904 series combines independent high-gain operational amplifiers with a broad supply-voltage range. Because the two channels are independent, one channel can process a sensor signal while the other performs an active filter, level conversion, or feedback function. Common-mode and output-voltage limitations still depend on the selected supply voltages, so every analog signal path must remain inside the amplifier’s valid input and output ranges.
Typical uses include low-frequency instrumentation, buffered sensor interfaces, audio preamplification, analog gain stages, and dual-axis control loops. The 700 kHz bandwidth is most appropriate for general-purpose signal paths rather than high-speed video, RF, or precision data-conversion applications. Split-supply operation can simplify bipolar signal handling, while single-supply operation may require input and output biasing around the midpoint of the supply.
Designers should use the manufacturer’s pin-description and typical-application information to establish channel assignments, bypass-capacitor placement, and acceptable output-load conditions. Decouple each supply rail close to the device, keep feedback paths short, and verify that input common-mode voltage and output swing remain valid over the full supply range and temperature range intended for the design.
This page organizes the key device characteristics, practical application guidance, verified pricing references, pin-location information, and same-footprint replacement options. It also distinguishes documented LM2904 family choices from alternatives that would require a different package or different electrical capabilities, helping engineers narrow a redesign without overlooking PCB compatibility.
直接替換替代品，適用於 LM2904TH-13 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LM2904TH-13 （相同外形與佔位） — 差異在於 Mounting Type, Package, Product Type.
LM2904AS-13
✅ 直接替換聯絡詢價
查看資料表 →LM2904TH-13 最大額定值與電氣特性
| Product Type | Dual operational amplifier |
| Amplifier Count | 2 circuits |
| Application Category | Standard general-purpose amplifier |
| Gain-Bandwidth Product | 700 kHz |
| Supply Voltage Range | ±18 V (36 V total span) |
| Single-Supply Operation | Supported |
| Split-Supply Operation | Supported |
| 封裝 | 8-pin TSSOP |
| 安裝類型 | Surface mount |
| Datasheet File Size | 863 KB |
| Datasheet Page Count | 15 pages |
LM2904TH-13 8-pin tssop 腳位配置指南
LM2904TH-13（8-pin tssop 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： LM2904TH-13.
請參閱 資料表 以查看完整腳位配置。
典型應用
LM2904TH-13 適用於 6 應用s: Dual-Channel Sensor Signal Conditioning, Audio Preamplifier, Active Filter and Feedback Control, Single-Supply Analog Interface, Split-Supply Bipolar Amplification, Industrial Control and Instrumentation.
Dual-Channel Sensor Signal Conditioning
The LM2904TH-13 fits a two-channel sensor-conditioning design when both signals can share the same supply arrangement and the required bandwidth is below the device’s 700 kHz gain-bandwidth characteristic. Its two independent amplifier channels can provide separate gain or filtering functions without requiring two packages. The design must keep sensor outputs inside the valid common-mode range and should verify offset voltage, bias current, and output swing against the exact electrical limits in the LM2904 family datasheet.
Audio Preamplifier
For low-frequency audio preamplification, the LM2904TH-13 can serve as a general-purpose dual gain stage with a 700 kHz gain-bandwidth characteristic. The two independent channels can support stereo audio paths or one channel can be used as a feedback or buffer element. Input biasing, output swing, noise behavior, and load capability must be checked against the actual audio signal level, rail voltage, and source impedance before the amplifier is committed to the design.
Active Filter and Feedback Control
The LM2904TH-13 is suitable for modest-bandwidth active-filter and feedback-control loops that need two amplifiers in one 8-pin TSSOP package. Its two independent channels can implement a second-order active-filter section plus auxiliary gain, or separate two axes of a simple analog control loop. Component tolerances and the amplifier’s gain-bandwidth response determine usable closed-loop bandwidth, while output-swing and phase-margin checks are essential before adding the device to a compensation network.
Single-Supply Analog Interface
A single-supply interface using the LM2904TH-13 can be practical when the source and destination share a common reference and the signal does not require rail-to-rail input or output swing. The LM2904 series supports single-supply operation, but designers must preserve valid input common-mode voltage and output headroom. A reference node near mid-supply may be required for bipolar signals, and supply bypassing should be placed close to the device pins.
Split-Supply Bipolar Amplification
For bipolar signals processed around ground, the LM2904TH-13 can be evaluated as a dual split-supply amplifier. The LM2904 family supports split-power-supply operation and is identified up to ±18 V, while its 700 kHz gain-bandwidth characteristic suits general-purpose rather than high-speed signal chains. The circuit must maintain adequate input common-mode range and output swing on both rails, and supply-decoupling and grounding practices determine whether the additional channels remain quiet.
Industrial Control and Instrumentation
The LM2904TH-13 can be used in general industrial control or instrumentation blocks where two low-frequency amplifier channels are useful in a compact surface-mount package. It can support gain stages, comparators with suitable feedback, buffer functions, and analog summing networks. Industrial suitability depends on the device’s specified temperature range, noise performance, offset behavior, and supply limits for the installation environment, all of which should be checked before release to production.
工程參考資料，適用於 LM2904TH-13 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | LM2904AS-13 | LM2904P3 |
|---|---|---|---|
| Package | 8-pin TSSOP | 8-pin TSSOP | 8-pin TSSOP |
| Brand | Diodes Incorporated | Diodes Incorporated | Diodes Incorporated |
| Amplifier Count | 2 circuits | 2 circuits | 2 circuits |
| Application Category | Standard general-purpose amplifier | General-purpose dual operational amplifier | General-purpose dual operational amplifier |
主要差異化特點
- Two independent amplifier channels in an 8-pin TSSOP (對比LM2904AS-13)
- Same-family alternative supports footprint reuse (對比LM2904P3)
- Documented 700 kHz gain-bandwidth characteristic (對比LM2904AS-13)
設計說明
Place the supply-bypass capacitors immediately between each supply pin and ground, using the shortest possible traces. Because both amplifier channels share the package supply pins, inadequate bypassing can allow output-current transients from one channel to disturb the other. Check the datasheet’s recommended capacitance and capacitor-voltage rating, and account for DC-bias effects when ceramic capacitors are used.
Keep each feedback network close to its corresponding amplifier pins and route high-impedance input and feedback traces away from supply, clock, and switching-node traces. The two channels are independent, but sharing ground and supply connections can create crosstalk if their return currents overlap beneath the device. Use a quiet ground reference for input returns and avoid routing output traces beneath the package where practical.
Do not treat the 700 kHz gain-bandwidth product as 700 kHz of usable closed-loop bandwidth at every gain setting. Feedback resistance and capacitance also influence gain accuracy, noise, and stability. When driving a load, verify output-current capability, output-swing limits, and capacitive-load stability; when using a single supply, also confirm that the input common-mode range covers the signal excursion.
合規資訊
No explicit RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statement appears in the retrieved product information.