MC3476P1 Low-Cost Programmable Operational Amplifier | onsemi
MPN: MC3476P1 ✗ Cuối đờiMC3476P1 Tóm tắt
An operational amplifier is a voltage-controlled differential amplifier with very high open-loop gain. Its two inputs are the inverting input and non-inverting input, while the output is controlled by feedback in most practical circuits. The programmable family represented by the MC3476P1 adds a bias-current control function, allowing the operating current and associated performance to be adjusted externally. This makes the device more flexible than a fixed-bias amplifier when system designers need to balance power consumption, bandwidth, output drive, and signal-source loading.
The MC3476P1 is described by its manufacturer as a low-cost selection of the MC1776 programmable operational-amplifier family. Its low power consumption is useful in battery-powered, portable, and low-power instrumentation systems. High input impedance helps reduce loading on high-impedance signal sources, which can help preserve signal amplitude and reduce input-stage interaction. The programmable bias architecture also gives designers a way to tailor performance after considering source impedance, gain, bandwidth, and acceptable supply current.
Typical analog uses include sensor-interface stages, low-frequency instrumentation, buffer and gain stages, active filters, and signal-conditioning blocks in industrial or embedded control systems. The device can be used where a general-purpose amplifier is sufficient and adjustable operating current is valuable. Designers should review the manufacturer datasheet for guaranteed input-voltage range, output-swing limits, supply-current ranges, gain-bandwidth behavior, offset voltage, input bias current, and package details before finalizing a design.
A key implementation consideration is the connection of the programmable-bias circuitry. Incorrect resistor values, unsuitable bypassing, or operation outside the specified supply and common-mode ranges can reduce stability or prevent expected output behavior. Keep the input network and feedback components close to the device, use a stable bypass capacitor at the supply pins, and verify noise, settling time, and output-swing requirements with the actual source impedance and load.
This page combines the manufacturer-linked product identity, documented package information, application guidance, and practical design considerations for engineers evaluating the MC3476P1. Because the exact electrical limits and pin assignments are not reproduced in the cited search results, consult the original MC3476P1 datasheet for authoritative values before schematic release, PCB layout, or production qualification.
Bộ thay thế dễ dàng lắp đặt cho MC3476P1 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
MC1776CP1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC3476P1 Tỷ lệ tối đa & tính chất điện
| Product Type | Programmable operational amplifier |
| Amplifier Type | General-purpose single operational amplifier |
| Circuit Count | 1 circuit |
| Programmability | Externally adjustable operating bias |
| Hộp | 8-PDIP |
| Kiểu lắp đặt | Through-hole |
| Power Consumption | Low |
| Input Impedance | High |
Hướng dẫn cấu hình chân MC3476P1 8-pdip
Cấu hình chân cho MC3476P1 (8-pdip 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 MC3476P1.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
MC3476P1 phù hợp cho 6 Áp dụngs: Low-Power Sensor Signal Conditioning, Industrial Instrumentation Amplifier, Programmable Active Filter, Portable Battery-Powered Analog Front End, Precision Buffer Stage, Precision Low-Level Voltage Amplifier.
Low-Power Sensor Signal Conditioning
The MC3476P1 fits low-level sensor front ends that require adjustable operating current and high input impedance. Place the amplifier close to the sensor source so input bias current produces minimal voltage error and high source resistance remains insensitive to loading. Program the bias section according to the manufacturer guidance to balance bandwidth and power use. Check the input common-mode range, offset, noise, and output drive against the sensor output before committing the design.
Được đề xuất
Industrial Instrumentation Amplifier
The MC3476P1 can serve as the active stage of a low-frequency industrial instrumentation path when adjustable current is preferred over a fixed-bias amplifier. Its high input impedance helps isolate transducers and divider networks, while low power consumption supports compact multi-channel equipment. Establish the required common-mode and output-swing margins, then validate common-mode rejection and settling with the actual sensor and cable. The programmable-bias network must follow the original data sheet.
Được đề xuất
Programmable Active Filter
The MC3476P1 is suitable for first active-filter stages where the designer needs to tune amplifier current alongside resistor and capacitor selection. Adjustable bias can help optimize bandwidth, noise, and power consumption for the selected filter topology. Simulate closed-loop stability at the intended gain, confirm that the output remains inside the specified swing, and preserve phase margin after component tolerances are included. Verify every operating point against the original electrical characteristics.
Được đề xuất
Portable Battery-Powered Analog Front End
The low power consumption and programmable operating point of the MC3476P1 make it relevant to portable measurement equipment. Select a bias condition that meets the required response time without consuming unnecessary current, and estimate the complete analog-path consumption before defining the battery budget. Protect the input against transients and keep high-impedance nodes physically short. Confirm whether the available 8-PDIP package and legacy device status remain appropriate for the intended production volume.
Được đề xuất
Precision Buffer Stage
The MC3476P1 can act as an adjustable buffer between a high-impedance source and a downstream measurement circuit. High input impedance limits source loading, while the programmable bias permits a deliberate trade between power consumption and dynamic performance. Check output-current capability, capacitive-load stability, and output-voltage headroom for the chosen bias setting. Include offset and bias-current errors in the end-to-end accuracy calculation rather than relying only on nominal signal amplitude.
Được đề xuất
Precision Low-Level Voltage Amplifier
The MC3476P1 can amplify low-level voltages when its offset, bias-current, and noise characteristics satisfy the error budget. Use the programmable feature to establish the operating current required by the gain-bandwidth target, then verify linearity across the full input and output ranges. A grounded, short input route and decoupled supply reduce avoidable errors. Compare the legacy MC3476P1 against an actively maintained device before using it in new high-volume industrial or medical programs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC3476P1 — 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 | MC1776CP1 |
|---|---|---|
| Product Type | Low-cost programmable operational amplifier | Programmable operational amplifier |
| Brand | onsemi | onsemi |
| Package | 8-PDIP | 8-PDIP |
| Programmable Bias | Yes | Yes |
Bảo phân biệt quan trọng
- Programmable operating point for analog design optimization (vsMC1776CP1)
- Low-power orientation for portable and multi-channel designs (vsMC1776CP1)
- High input impedance for source-sensitive signal paths (vsMC1776CP1)
Ghi chú thiết kế
Place the MC3476P1 near the source of the signal and route inverting and non-inverting inputs as short as practical. Keep the programmable-bias resistor, feedback components, and bypass capacitor close to their associated pins. The 8-PDIP package offers through-hole access, but lead inductance, long feedback loops, and nearby switching circuitry can still degrade high-impedance-node behavior. Use a continuous ground reference and avoid routing sensitive inputs beside high-current switching nodes.
Treat the programmable-bias network as part of the power and performance design rather than as a fixed resistor copied without review. Use the original data sheet to relate external bias resistance to quiescent current, bandwidth, output drive, and input bias current. Confirm the total supply demand against the intended operating mode and battery or regulator capacity. Add local supply bypassing and verify startup behavior, output settling, and thermal conditions using the selected bias setting.
Do not assume that all MC1776-family parts are electrically and pin-for-pin interchangeable with the MC3476P1. Verify package dimensions, pin numbering, programmable-bias polarity, common-mode range, output swing, and stability for the exact alternative. Likewise, confirm that the signal remains within the input range and that the output has sufficient headroom at the selected current. A family name or cross-reference listing alone is not enough to approve a drop-in substitution.
For high-impedance sources, include amplifier input-bias-current error, source capacitance, thermal noise, and offset drift in the signal-budget calculation. Keep sensitive nodes away from high-impedance leakage paths and provide a defined return path for input bias current. If the amplifier drives a sampling ADC, evaluate settling at the ADC acquisition time and add isolation or filtering only after confirming that the extra poles do not impair loop stability.
Thông tin tuân thủ
The available product information does not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 qualification is not applicable because this is a general-purpose operational amplifier rather than an automotive-qualified device.
