TLV8542DR - Dual 3.6V 8kHz Low-Power RRIO Op Amp | TI
MPN: TLV8542DR ✓ Hoạt độngTLV8542DR Tóm tắt
An operational amplifier is an analog signal-conditioning IC that amplifies the voltage difference between its non-inverting and inverting inputs. The TLV8542 belongs to the operational-amplifier hierarchy, where it serves as a general-purpose amplifier, comparator without latch, buffer, or transducer-conditioning element. Rail-to-rail input and output operation, abbreviated RRIO, allows the amplifier to process signals near the positive or negative supply limits and to swing its output close to those limits.
The TLV8542’s headline characteristics are its dual-channel configuration, 3.6 V maximum supply rating, 8 kHz gain-bandwidth product, and 500 nA ultra-low quiescent current. The 8 kHz bandwidth makes the device appropriate for low-frequency signal paths rather than high-speed waveform or wideband communications. Its 500 nA quiescent current reduces supply demand when the system is lightly loaded, supporting battery-powered instrumentation, portable sensors, and low-leakage measurement circuits.
The TLV8542 uses rail-to-rail input stages and rail-to-rail output capability to improve usable signal range in low-voltage systems. Because the device is intended for nanopower operation, system-level design should consider the interaction between its frequency response, output-capacitance stability, load current, supply noise, and the selected operating mode. The manufacturer product page identifies the device as a dual, 3.6 V, 8 kHz, 500 nA RRIO operational amplifier, while the ordering information identifies the D package as an 8-pin SOIC rated from -40°C to +125°C.
Typical applications include low-power sensor interfaces, portable medical or industrial monitoring, battery-operated data acquisition, low-frequency filter stages, and general-purpose signal conditioning. It can also buffer sensors whose output spans much of the available supply range. For applications requiring greater bandwidth, lower offset, or different supply limits, an amplifier with corresponding electrical ratings should be selected instead of assuming interchangeability solely from the package.
The principal design consideration is to verify the amplifier’s transient response and output behavior over the complete input range, especially when driving capacitive loads. Decoupling capacitors should be placed close to the supply pins, while input and feedback components should be arranged to minimize parasitic pickup. Because the bandwidth is only 8 kHz, designers should use the TLV8542 for slow analog signals rather than forcing it into high-speed signal paths.
This product page combines the manufacturer’s TLV8542 specifications and ordering information with practical packaging, comparison, sourcing, and design guidance. It also distinguishes the verified dual 8-pin SOIC TLV8542DR from the related single-channel TLV8541 and four-channel TLV8544 products, helping engineers determine channel count, package compatibility, and whether a true pin-to-pin replacement is required.
Bộ thay thế dễ dàng lắp đặt cho TLV8542DR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Không có bộ thay thế dễ dàng lắp đặt sẵn có cho sản phẩm này.
Yêu cầu các bộ thay thếTLV8542DR Tỷ lệ tối đa & tính chất điện
| Amplifier Type | General-purpose operational amplifier |
| Number of Channels | 2 channels |
| Điện áp cung cấp | 3.6 V maximum |
| Gain-Bandwidth Product | 8 kHz |
| Điện áp yên tĩnh | 500 nA per amplifier |
| Input Common-Mode Range | Rail-to-rail |
| Output Swing | Rail-to-rail |
| Khoảng nhiệt độ hoạt động | -40°C to +125°C |
| Hộp | 8-pin SOIC (D) |
| Kiểu lắp đặt | Surface mount |
Hướng dẫn cấu hình chân TLV8542DR 8-pin soic (d)
Cấu hình chân cho TLV8542DR (8-pin soic (d) gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho TLV8542DR.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
TLV8542DR phù hợp cho 6 Áp dụngs: Low-Power Sensor Signal Conditioning, Battery-Powered Data Acquisition, Portable Medical Monitoring, Industrial Process Monitoring, Low-Frequency Active Filtering, Low-Leakage Sensor Interface.
Low-Power Sensor Signal Conditioning
The TLV8542DR fits sensor interfaces that require two low-bandwidth analog channels on a compact board. Its 500 nA quiescent current helps limit standing consumption, while the rail-to-rail input characteristic supports sensor signals near the positive or negative supply limit. Use one channel for amplification and the other for buffering or reference conditioning. The 8 kHz gain-bandwidth product is appropriate for temperature, pressure, and slow chemical sensors, but designers should verify the sensor’s bandwidth, output impedance, and required closed-loop gain before fixing the filter and compensation network.
Được đề xuất
Battery-Powered Data Acquisition
The dual TLV8542DR is useful in battery-operated data-acquisition systems that measure several slowly changing analog quantities. Its 500 nA quiescent current per amplifier reduces supply load when the acquisition front end is active, and the 8-pin SOIC package leaves more board area than a larger quad-device arrangement. Two channels can condition separate inputs or provide an active filter and buffer stage. Because the 8 kHz bandwidth limits signal speed, this approach is best for environmental logging, industrial monitoring, and portable instrumentation rather than waveform acquisition.
Được đề xuất
Portable Medical Monitoring
The TLV8542DR can serve as a low-power front end in portable monitoring equipment when the measured signals are slow and the circuit is designed around its 3.6 V maximum supply rating. One amplifier may provide gain for a low-level sensor, while the second supports filtering, level conditioning, or output buffering. Rail-to-rail input and output operation increases the available signal range in compact systems. Medical designs must independently verify accuracy, leakage, noise, safety, and application-specific qualification requirements rather than treating general-purpose operation as regulatory approval.
Được đề xuất
Industrial Process Monitoring
The TLV8542DR is suitable for slow industrial process signals that can be handled by an 8 kHz amplifier. Its two channels can amplify outputs from pressure, temperature, or position sensors, while the low 500 nA quiescent current can benefit remote or low-duty-cycle monitoring systems. Rail-to-rail inputs help accommodate sensor outputs near the supply rails. The circuit should include protection appropriate to the process environment, and designers should verify offset, noise, common-mode behavior, and output drive against the complete measurement specification.
Được đề xuất
Low-Frequency Active Filtering
The TLV8542DR can implement one or two low-frequency active-filter stages where low supply current and compact dual-channel packaging are priorities. Its 8 kHz gain-bandwidth product is appropriate for filters handling slow control, sensor, or measurement signals. One channel can provide the active filtering function and the other can buffer the filter output or form an additional stage. Component selection should account for operating-point gain, the amplifier’s small-signal bandwidth, output loading, and the desired closed-loop response; the component is not intended for high-speed filtering.
Được đề xuất
Low-Leakage Sensor Interface
The TLV8542DR is useful for sensor interfaces where each amplifier’s 500 nA quiescent current must remain small relative to the sensed current. Rail-to-rail input operation allows the measurement to cover a broad portion of the available supply range, and the 8-pin SOIC package supports a conventional surface-mount layout. The circuit should still be checked for input bias current, leakage through PCB contamination, sensor impedance, and resistor values. These considerations are especially important when the measured signal source has very high impedance or when the system operates over a broad temperature range.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TLV8542DR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này |
|---|---|
| Brand | Texas Instruments |
| Package | 8-pin SOIC (D) |
| Number of Channels | 2 channels |
| Maximum Supply Voltage | 3.6 V |
| Gain-Bandwidth Product | 8 kHz |
| Quiescent Current | 500 nA |
| Input Common-Mode Operation | Rail-to-rail |
| Output Operation | Rail-to-rail |
| Operating Temperature Range | -40°C to +125°C |
Bảo phân biệt quan trọng
- Two amplifiers in one 8-pin SOIC package (vsTLV8541)
- Ultra-low 500 nA quiescent current (vsTLV8544)
- Rail-to-rail input and output operation (vsTLV8541)
Ghi chú thiết kế
Place the supply-bypass capacitor close to the SOIC power and ground pins, and keep the return path short to reduce supply impedance. Arrange the two amplifier sections so sensitive input traces remain away from digital switching nodes. Since the amplifier has only 8 kHz gain-bandwidth, prioritize low parasitic feedback loops and stable grounding over high-speed routing techniques. The manufacturer datasheet should be used for the exact D-package pin locations before PCB artwork is released.
Do not select this amplifier for signals above its intended low-frequency capability. Its 8 kHz gain-bandwidth product means that closed-loop gain and phase behavior must match the application. Also avoid assuming that a related-family amplifier is a drop-in substitute: TLV8541 is single-channel in 5-pin SOT-23 and TLV8544 is quad-channel in 14-pin TSSOP. Confirm channel count, package, pinout, supply range, and electrical limits before any substitution.
Estimated: with a 3.6 V maximum supply and two amplifiers at 500 nA each, the quiescent supply current is 1.0 µA before input bias current, load current, leakage, and external-circuit consumption. This estimate uses 2 channels × 500 nA. Actual battery-life calculations must include sensor currents, pull-up or pull-down networks, regulator efficiency, and the selected operating mode rather than relying on amplifier quiescent current alone.
Use rail-to-rail input and output capability to maximize signal range, but preserve a defined common-mode and output-voltage region in the system design. Stable feedback ratios and suitable resistive values are important because the amplifier is optimized for low-frequency, low-power operation. If driving a capacitive load, check the load magnitude and stability guidance in the manufacturer datasheet before increasing the feedback capacitance or adding isolation resistance.
Thông tin tuân thủ
The available manufacturer and distributor information does not explicitly state the requested compliance statuses. AEC-Q100 is listed as not applicable because the verified ordering information does not identify TLV8542DR as an automotive-qualified variant.
