MC1458PS - Dual 30V 1MHz Op Amp | Texas Instruments
MPN: MC1458PS ✓ Hoạt độngMC1458PS Tóm tắt
An operational amplifier is an analog integrated circuit that uses high-gain differential amplification to compare and amplify small voltage differences. The MC1458 belongs to the general-purpose operational-amplifier family within the broader analog IC and semiconductor hierarchy. Its two channels can operate independently for signal conditioning, voltage following, summing, integration, or other feedback-based amplifier configurations.
Each MC1458 channel offers a 1 MHz gain-bandwidth product, 500 V/ms slew rate, and 90 dB common-mode rejection in the supplied product data. The reported input bias current is 1.5 µA, input offset current is 200 nA, and typical input offset voltage is 6 mV. Internal frequency compensation eliminates the need for external compensation components in the manufacturer's standard voltage-follower application.
The MC1458 architecture is intended for general-purpose precision amplification rather than high-speed or rail-to-rail operation. Its wide common-mode input range makes it suitable for conventional bipolar-supply circuits, while the absence of latch-up improves robustness during power sequencing and input-overvoltage events. Short-circuit protection helps limit output current when an output is overloaded, although sustained short-circuit duration and internal current limits should be confirmed in the manufacturer datasheet.
Typical uses include audio preamplification, summing amplifiers, active filters, sensor-signal conditioning, industrial control blocks, and general voltage-following circuits. Two amplifiers in one package can reduce component count and simplify dual-channel or differential signal-path layouts. The commercial MC1458PS temperature grade is 0 °C to +70 °C, making it appropriate for room-temperature industrial and consumer equipment rather than exposed automotive or extreme-temperature installations.
PCB design should reserve adequate copper around the supply pins and route each channel's feedback components close to the associated amplifier pins to reduce parasitic feedback and instability. Decoupling capacitors should be placed directly between each supply pin and ground. Because this is a non-rail-to-rail, bipolar general-purpose amplifier, input and output common-mode headroom must be checked against the actual supply voltages.
This page combines verified manufacturer and distributor information, drop-in family alternatives, package and pinout details, application guidance, and design notes to provide more implementation context than the basic distributor catalog entry.
Bộ thay thế dễ dàng lắp đặt cho MC1458PS — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MC1458PS (cùng hình factor và footprint) — khác nhau ở Amplifier Type, Input Bias Current, Input Offset Voltage, Operating Temperature Range, Package.
MC1458D
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC1458U
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MC1558D
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MC1558U
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MC1458PS Tỷ lệ tối đa & tính chất điện
| Amplifier Type | Dual general-purpose operational amplifier |
| Number of Amplifier Channels | 2 channels |
| Manufacturer Voltage Rating | 30 V |
| Gain-Bandwidth Product | 1 MHz |
| Slew Rate | 500 V/ms |
| Input Bias Current | 1.5 µA |
| Input Offset Current | 200 nA |
| Input Offset Voltage | 6 mV |
| Common-Mode Rejection Ratio | 90 dB |
| Điện áp cung cấp | 5.6 mA |
| Khoảng nhiệt độ hoạt động | 0 °C to +70 °C |
| Voltage Noise Density | 45 nV/√Hz at 1 kHz |
| Hộp | SOIC-8, 8 pins |
| Compensation | Internal frequency compensation |
| Short-Circuit Protection | Yes |
| Trạng thái RoHS | Compliant |
Cấu hình chân MC1458PS
| Chân 1 | OUTA — Amplifier A output |
| Chân 2 | INA- — Amplifier A inverting input |
| Chân 3 | INA+ — Amplifier A non-inverting input |
| Chân 4 | V- — Negative supply connection |
| Chân 5 | INB+ — Amplifier B non-inverting input |
| Chân 6 | INB- — Amplifier B inverting input |
| Chân 7 | OUTB — Amplifier B output |
| Chân 8 | V+ — Positive supply connection |
Ứng dụng tiêu biểu
MC1458PS phù hợp cho 6 Áp dụngs: Audio Preamp and Signal Conditioning, Industrial Sensor Signal Conditioning, Active Filter and Integrator Stages, Power Supply Control and Monitoring, Voltage Follower and Buffer Stage, Communications and Interface Conditioning.
Audio Preamp and Signal Conditioning
The MC1458PS fits low-to-moderate bandwidth audio preamplification because each channel provides a 1 MHz gain-bandwidth product and 500 V/ms slew rate. The dual SOIC-8 package allows separate channels to process left and right, balanced, or sequential audio signals while reducing board area. A conventional feedback network can establish the required gain, and internal frequency compensation removes the need for an external compensation capacitor. The designer must still verify output swing, common-mode headroom, noise contribution, and stability at the selected gain. The verified 6 mV input offset and 45 nV/√Hz noise density at 1 kHz are acceptable for general signal conditioning, but they may not satisfy demanding high-fidelity or instrumentation requirements.
Được đề xuất
Industrial Sensor Signal Conditioning
The MC1458PS can amplify low-level sensor outputs when the design operates from conventional bipolar supplies and remains within the verified 0 °C to +70 °C range. Its 90 dB common-mode rejection helps reject differential interference around a sensed common-mode voltage, while the 1.5 µA input bias current is suitable for many resistive sensors. The two channels can condition a differential sensor pair or two related inputs. Because the amplifier is not specified as rail-to-rail, the engineer must confirm that the sensor's output range remains inside the common-mode input limits and that the desired output swing is available. Input filtering, guarding, and careful grounding are important when long sensor cables introduce noise.
Được đề xuất
Active Filter and Integrator Stages
The MC1458PS is appropriate for first-order active filters and integrators where a 1 MHz gain-bandwidth product provides more bandwidth than typical low-frequency control applications require. Internal frequency compensation supports voltage-follower stability without an added compensation component, while external resistors and capacitors determine the filter or integration response. Each of the two channels can implement a separate pole, or the channels can be cascaded for a higher-order response. Component tolerances and the amplifier's 6 mV input offset voltage will influence DC accuracy, particularly in low-frequency integrators. The supply rails must provide adequate headroom for the input and output waveforms, and the feedback capacitor should be placed close to the inverting input.
Được đề xuất
Power Supply Control and Monitoring
The dual MC1458PS can implement independent error amplifiers, voltage comparators with feedback, or small-signal control blocks around a power-conversion stage. Its 30 V rating provides useful headroom for conventional industrial supply rails, and the 5.6 mA reported supply current keeps the amplifier's own demand moderate. The two channels can monitor input and output conditions or amplify the error signal in a regulator control loop. Since the device is not rail-to-rail and its complete supply-voltage limits must be taken from the manufacturer datasheet, the selected rail must preserve input and output common-mode headroom. Resistor-divider design should include input-bias-current error and consider the specified 6 mV input offset.
Được đề xuất
Voltage Follower and Buffer Stage
The MC1458PS is specifically suited to voltage-follower service because the manufacturer describes its wide common-mode input range, lack of latch-up, short-circuit protection, and internal frequency compensation as advantages in that configuration. A follower provides high input impedance and low output impedance when driving a subsequent stage. Two channels can buffer two control or measurement nodes independently. The 500 V/ms slew rate is adequate for many moderate-frequency control and audio paths, but the resulting full-power bandwidth should not be confused with the 1 MHz small-signal gain-bandwidth product. Load capacitance and stability must be checked in the final circuit, and the output must remain within the device's swing limits relative to the chosen supply voltage.
Được đề xuất
Communications and Interface Conditioning
The MC1458PS can condition low-level signals in communications equipment when the interface operates below the amplifier's 1 MHz gain-bandwidth limit and does not require modern rail-to-rail performance. Its 90 dB common-mode rejection can improve signal integrity when a small signal is superimposed on a larger common-mode voltage, while short-circuit protection adds resilience in general-purpose interface circuitry. The dual-channel organization permits transmit and receive paths or two data-associated analog channels to share a package. Designers should avoid using the reported 45 nV/√Hz noise density for precision low-noise front ends, check input capacitance and stability with source wiring, and provide local supply bypassing. Any isolation or level-shifting requirement needs additional components beyond this amplifier.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC1458PS — 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 | MC1458D | MC1458U | MC1558D | MC1558U |
|---|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8, subject to suffix confirmation | SOIC-8, subject to suffix confirmation | SOIC-8, subject to suffix confirmation | SOIC-8, subject to suffix confirmation |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Amplifier Configuration | Dual general-purpose operational amplifier | Dual general-purpose operational amplifier | Dual general-purpose operational amplifier | Dual general-purpose operational amplifier | Dual general-purpose operational amplifier |
| Gain-Bandwidth Product | 1 MHz | 1 MHz | 1 MHz | 1 MHz class | 1 MHz class |
| Internal Compensation | Yes | Yes | Yes | Yes | Yes |
| Short-Circuit Protection | Yes | Yes | Yes | Yes | Yes |
| Offset Null Capability | No | No | No | No | No |
Bảo phân biệt quan trọng
- Two compensated amplifiers in one package (vsMC1458D)
- General-purpose 30 V and 1 MHz operating class (vsMC1558D)
- Short-circuit-protected general-purpose architecture (vsMC1458U)
Ghi chú thiết kế
Place the input, output, and feedback components close to their associated MC1458PS pins, particularly the feedback resistor or capacitor and the non-inverting input. Keep the two amplifier channels physically separated when they carry unrelated signals to reduce crosstalk. Use a continuous ground reference and place the supply-decoupling capacitor directly between the relevant supply pin and ground rather than routing the return through a distant capacitor pad.
Do not treat the 1 MHz gain-bandwidth product as an unrestricted 1 MHz signal bandwidth. Closed-loop bandwidth depends on the selected noise gain, and the 500 V/ms slew rate can impose a separate full-power bandwidth limit. Also verify the actual common-mode input range and output swing for the chosen supply voltage. The MC1458PS is a general-purpose, non-rail-to-rail bipolar amplifier, so modern low-voltage systems may require a different device.
Estimated: using the verified 5.6 mA supply current and an assumed 12 V operating supply gives amplifier power dissipation of 12 V × 5.6 mA = 0.0672 W before load-current effects. This calculation is an estimate based only on the supplied supply-current value and must not be treated as a datasheet dissipation rating. Confirm the minimum and maximum supply voltages, quiescent-current behavior, output-current limits, and thermal derating in the manufacturer datasheet before sizing the copper area.
Thông tin tuân thủ
RoHS compliance is stated in the supplied JLCPCB listing. The supplied data does not independently verify REACH, lead-free, halogen-free, conflict-minerals status, or AEC-Q100 qualification. The MC1458PS commercial temperature range is 0 °C to +70 °C.
