MAX038CPP+ - 40MHz Precision Waveform Generator | Analog Devices
料号： MAX038CPP+ ✗ 停产MAX038CPP+ 概述
A function generator is an electronic signal-source category used to create periodic test or excitation waveforms with controlled frequency, amplitude, and timing. Within the broader Clock & Timing hierarchy, the MAX038 is a clock generator and waveform generator rather than a general-purpose timer. Its low external-component count simplifies analog signal sources while its selectable waveforms support both laboratory-style stimulus and embedded system clocking.
The MAX038CPP+ provides selectable sine, square, or triangle output through TTL-compatible select pins. Its output is symmetrical around ground, making it convenient for bipolar-referenced circuits. Frequency and duty-cycle adjustments are independent, while sweep support extends the usefulness of the device beyond fixed-frequency operation. These features let a designer vary stimulus conditions without changing the output architecture.
The MAX038 architecture is intended for precision waveform generation at frequencies up to 40 MHz. The manufacturer lists a 2 V peak-to-peak output, low output impedance, and output drive of ±20 mA. The output drive specification is important when selecting termination, amplifier, cable, or load components: downstream circuitry must present a compatible load, and cable capacitance can degrade waveform quality at higher frequencies.
Typical uses include bench and portable test equipment, audio and communications signal generation, industrial stimulus systems, pulsed sensor testing, and educational waveform laboratories. The output buffer reduces the need for a separate line driver when the load is modest, while selectable waveforms make the device useful for functional checks involving sine, square, triangle, sawtooth, and pulse signals.
A key design consideration is that the MAX038CPP+ is a through-hole 20-pin DIP device, not a surface-mount part. PCB footprint, pin orientation, trace routing, and output termination should therefore be checked against the manufacturer datasheet before substitution. Waveform quality also depends on external resistor, capacitor, reference, and layout choices documented in the application information.
This page combines verified manufacturer specifications, distributor availability references, package details, and engineering-focused selection guidance. It is designed to help engineers identify whether the MAX038CPP+ fits a particular waveform-generation, timing, or test-stimulus requirement.
直接替换替代料： MAX038CPP+ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MAX038CPP
✅ 直接替换📋 参考替代料（不在目录中）
MAX038CWP
✅ 直接替换📋 参考替代料（不在目录中）
MAX038
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX038CPP/E
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX038CPA
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX038CPP+ 规格参数
| Product Type | Precision high-frequency function-generator IC |
| Maximum Carrier Frequency | 40 MHz |
| Operating Frequency Range | 0.1 Hz to 20 MHz |
| Supported Waveforms | Triangle, sawtooth, sine, square, and pulse |
| Output Amplitude | 2 V peak-to-peak |
| Output Offset | Symmetrical around ground |
| Output Drive | Up to ±20 mA |
| Output Impedance | Low impedance |
| Waveform Selection | Sine, square, or triangle selected by two TTL-compatible select pins |
| Frequency Control | Independent frequency adjustment |
| Duty-Cycle Control | Independent duty-cycle adjustment |
| Frequency Sweep Range | To 85% |
| Variable Duty Cycle | 15% to 85% |
| Temperature Coefficient | Low 200 ppm/°C |
| 封装 | 20-DIP, 0.300 inch row spacing, 7.62 mm |
| 安装类型 | Through-hole |
| Output Buffer | Integrated low-impedance output buffer |
| RoHS 状态 | unknown |
| REACH Status | unknown |
MAX038CPP+ 20-dip, 0.300 inch row spacing, 7.62 mm 引脚配置指南
MAX038CPP+（20-dip, 0.300 inch row spacing, 7.62 mm 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： MAX038CPP+.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX038CPP+ 适用于 6 应用s: Laboratory Waveform Generator, Communications Signal Testing, Audio and Tone Testing, Industrial Sensor Excitation, Pulse and Duty-Cycle Test Systems, Educational and Prototyping Work.
Laboratory Waveform Generator
MAX038CPP+ fits a laboratory signal-source position when a compact test fixture needs selectable sine, square, triangle, sawtooth, and pulse outputs. The verified family supports independent frequency and duty-cycle adjustment, while TTL-compatible waveform-select inputs simplify digital control from a microcontroller or test sequencer. Its 2 V peak-to-peak output is suitable for many low-voltage analog inputs, provided the load is within the verified ±20 mA drive capability. Compared with a fixed crystal oscillator, MAX038CPP+ gives the operator continuously adjustable excitation and sweep capability, reducing the need to change hardware for each waveform test.
推荐
Communications Signal Testing
MAX038CPP+ can serve as a controllable stimulus source for communications and modulation experiments because it generates sine, square, triangle, sawtooth, and pulse waveforms while supporting frequency sweep and duty-cycle adjustment. The 2 V peak-to-peak ground-referenced output is convenient for driving test receivers, comparator inputs, and amplifier stages that operate around ground. At higher frequencies, cable and input capacitance can affect amplitude and edge quality, so the design should use short connections, controlled termination, and an additional buffer when driving longer cables or heavier loads.
推荐
Audio and Tone Testing
For audio and general tone-testing applications, MAX038CPP+ provides sine and triangle waveforms with independent frequency control and a low-impedance output. The verified 2 V peak-to-peak amplitude is appropriate for line-level test points and low-voltage preamplifier inputs, while the integrated buffer can reduce the need for a basic line driver. Duty-cycle and pulse outputs also support timing and rhythm experiments. Engineers should account for the output drive limit of ±20 mA and add attenuation or active gain control when driving headphones, loudspeakers, long cable runs, or high-impedance monitoring equipment.
推荐
Industrial Sensor Excitation
MAX038CPP+ is useful for controlled sensor excitation where repeatable frequency and waveform selection are required. Sine excitation can support basic AC response measurements, square and pulse signals can exercise digital threshold inputs, and sawtooth or triangle signals can provide ramps or timing references. The two TTL-compatible waveform-select pins allow an embedded controller to choose output types without manual switches. The output amplitude and drive should be matched to the sensor interface, and protection may be needed when connecting to exposed equipment, long wiring, or high-voltage test points.
推荐
Pulse and Duty-Cycle Test Systems
The independent duty-cycle and frequency controls make MAX038CPP+ a natural fit for pulse-generation test systems. The verified family description identifies a 15% to 85% variable-duty-cycle range and sweep capability up to 85%, allowing an automated test fixture to vary timing conditions while observing the response of a DUT. The 2 V peak-to-peak ground-centered output works well with comparator, timer, and logic-input test circuits. At the fastest frequencies, verify output rise and fall behavior, load capacitance, and cable length against the manufacturer’s test conditions before interpreting timing measurements.
推荐
Educational and Prototyping Work
MAX038CPP+ is well suited to electronics education and prototyping because one package provides multiple waveform types, adjustable frequency, and adjustable duty cycle with relatively few external components. Students can compare sine, square, triangle, sawtooth, and pulse outputs on an oscilloscope while learning about period, duty cycle, frequency sweep, TTL logic control, and impedance. The 20-DIP through-hole package is also easy to prototype on a solderable breadboard or perforated board. The design should still provide adequate decoupling, a clean ground reference, and an output termination appropriate for the oscilloscope and test wiring.
推荐
推荐产品汇总
工程参考数据： MAX038CPP+ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MAX038CPP | MAX038CWP | MAX038 | MAX038CPP/E | MAX038CPA |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 20-DIP (0.300 inch, 7.62 mm) | 20-DIP (0.300 inch, 7.62 mm) | 20-DIP (0.300 inch, 7.62 mm) | 20-DIP (0.300 inch, 7.62 mm) | 20-DIP (0.300 inch, 7.62 mm) | 20-DIP (0.300 inch, 7.62 mm) |
| Product Type | Precision high-frequency function-generator IC | MAX038 waveform-generator family | MAX038 waveform-generator family | MAX038 waveform-generator family | MAX038 waveform-generator family | MAX038 waveform-generator family |
| Waveforms | Triangle, sawtooth, sine, square, and pulse | Triangle, sawtooth, sine, square, and pulse | MAX038 family waveform-generation function | Triangle, sawtooth, sine, square, and pulse | MAX038 family waveform-generation function | MAX038 family waveform-generation function |
关键差异点
- Integrated multi-waveform generation （对比 AD9850)
- Independent timing controls （对比 MAX038)
- Ground-referenced low-impedance output （对比 MAX038CPP)
设计说明
Use the manufacturer’s recommended bypass and external-component network around the MAX038CPP+. The verified material identifies a precision function-generator architecture but does not provide the complete component values or capacitor tolerances in the supplied snippets. Therefore, do not substitute arbitrary values during layout or bring-up. Begin with the reference circuit, confirm supply polarity and decoupling placement, and scope the output before increasing frequency or load. Keep the analog and digital control returns connected to a low-impedance ground plane so the waveform-select logic and output reference share a stable return path.
Treat the output as a low-impedance 2 V peak-to-peak signal with verified drive up to ±20 mA, not as an unlimited power-output stage. The output is symmetrical around ground, so downstream circuits should also be ground-referenced or use appropriate coupling. For high-frequency operation, minimize cable length and stray capacitance, provide a controlled termination, and add an external buffer when driving a long probe, cable, or higher-capacitance load. Verify rise time and amplitude at the actual load because the listed output specification alone does not guarantee the same waveform quality under every termination.
Do not assume that a similar frequency synthesizer is a drop-in replacement. The verified search mentions AD9850 and LMT6429, but it does not establish a same-package, pin-to-pin replacement for the MAX038CPP+ 20-DIP waveform generator. Also verify the meaning of the plus suffix, exact ordering code, pinout, and package before substituting MAX038CPP or another family variant. A functional replacement may require different external components, logic levels, output amplitude, or PCB routing even when its frequency capability appears similar.
Design the MAX038CPP+ footprint as a through-hole 20-DIP device with 0.300-inch row spacing and 7.62 mm pitch. Preserve pin numbering, keep the waveform-select traces away from sensitive output routing where practical, and provide a low-impedance ground reference under or near the analog return connections. Because the verified data does not include a complete manufacturer pin table, use the official MAX038 datasheet rather than deriving pin assignments from generic DIP conventions. Confirm mechanical height, hole diameter, and connector clearance on the final board before fabrication.
合规信息
The supplied verified data does not provide compliance declarations for RoHS, REACH, lead-free status, halogen-free status, or conflict-minerals reporting. The device is classified as a clock and timing IC rather than an automotive-qualified power semiconductor.
