MAX038CWP+ - 20MHz Precision Waveform Generator | Analog Devices
부품 번호: MAX038CWP+ ✗ 단종MAX038CWP+ 개요
A function generator or waveform generator is an active analog signal-source category that converts a frequency-setting network into repeatable time-domain waveforms. Within the broader hierarchy, the MAX038 belongs to clock and waveform generation, then integrated circuits and semiconductors. It consolidates multiple waveform outputs and frequency and duty-cycle controls into one circuit, reducing the component count required for bench instruments, signal-conditioning systems, and industrial test equipment.
Verified features include a 20MHz upper frequency, a 0.1Hz lower frequency, independent frequency and duty-cycle adjustments, variable duty cycle up to 85%, and frequency sweep capability. Its internal 2.5V bandgap provides the reference for the external timing components. The output stage is specified as a low-impedance buffer with 0.1-ohm output impedance, helping the generator interface more effectively with downstream analog and digital test circuits than a passive or high-impedance source would.
The MAX038 family generates five principal waveform formats from a common internal timing architecture. Triangle and sawtooth outputs suit ramp-based stimulus and sweep systems, sine output supports analog excitation, and square or pulse output provides clock-like and duty-cycle-adjustable signals. Frequency and duty-cycle adjustment remain independent, allowing output timing to be changed with separate external networks rather than tying both characteristics to one component.
Typical uses include audio test equipment, sensor and transducer excitation, communications signal testing, automated production-test systems, function generators, and general laboratory stimulus sources. The MAX038 is especially useful when one IC must support multiple waveform formats and frequencies up to 20MHz without building separate analog oscillator paths.
Designers should treat output loading, timing-component tolerances, reference accuracy, and bandwidth limits as the main engineering constraints. Place the frequency-setting resistor and capacitor close to their associated pins, maintain the specified supply and bypass conditions, and verify downstream input capacitance before assuming the 0.1-ohm buffer can drive arbitrary loads.
This page consolidates manufacturer specifications, sourcing status, verified drop-in candidates, and application guidance. It separates confirmed data from unavailable parameters and explicitly flags the absence of a manufacturer replacement, helping engineers assess whether an existing MAX038 design can be maintained without an unsupported substitution.
드롭인 대체품: MAX038CWP+ — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 제품에는 사용 가능한 드롭인 대체품이 없습니다.
대체품 요청MAX038CWP+ 사양
| Product Type | High-frequency precision waveform generator |
| Operating Frequency Range | 0.1Hz to 20MHz |
| Upper Frequency | 20MHz |
| Lower Frequency | 0.1Hz |
| Supported Waveforms | Triangle, sawtooth, sine, square, and pulse |
| Internal Reference Voltage | 2.5V bandgap |
| Frequency Adjustment | External resistor and capacitor |
| Duty-Cycle Adjustment | Independent, variable up to 85% |
| Frequency Sweep Range | Up to 85% |
| Output Impedance | 0.1 ohm |
| Output Stage | Low-impedance buffered output |
| 패키지 | 20-pin SOIC, 0.295-inch body width, 7.50mm |
| 실장 유형 | Surface mount |
| Minimum External Components | Minimal external-component implementation |
MAX038CWP+ 20-pin soic, 0.295-inch body width, 7.50mm 핀 구성 가이드
MAX038CWP+(20-pin soic, 0.295-inch body width, 7.50mm 패키지)의 핀 구성입니다. 핀 번호, 기능, 연결 다이어그램은 제조사 데이터시트에 정의되어 있습니다. 정확한 풋프린트와 솔더링 지침은 해당 문서를 참조하십시오.
다음에 대한 상세 핀아웃 데이터 없음: MAX038CWP+.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
MAX038CWP+ 적합 용도: 6 애플리케이션s: Audio Test Signal Generation, Sensor and Transducer Excitation, Communications Signal Testing, Automated Production Test, Frequency Sweep Systems, Pulse and Timing Signal Generation.
Audio Test Signal Generation
The MAX038CWP+ fits audio test systems because it generates sine, square, triangle, sawtooth, and pulse outputs across 0.1Hz to 20MHz. Its internal 2.5V bandgap provides the reference for the external timing network, allowing frequency to be established with a resistor and capacitor. The 0.1-ohm output buffer helps drive a following amplifier or measurement channel, although output amplitude, distortion, and maximum load must still be checked for each audio bandwidth.
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Sensor and Transducer Excitation
The MAX038CWP+ provides selectable sine and ramp waveforms for excitation of sensors, transducers, and vibration systems. Frequencies from 0.1Hz through 20MHz cover slow environmental tests as well as higher-bandwidth diagnostic signals, while independent duty-cycle adjustment supports pulse-shaped stimuli. The buffered 0.1-ohm output should be paired with a suitable gain stage, protection network, and anti-alias filter; otherwise sensor loading can alter amplitude and distort the intended stimulus.
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Communications Signal Testing
MAX038CWP+ is useful for legacy communications test fixtures that require square, pulse, sine, or sawtooth excitation up to 20MHz. The independent frequency and duty-cycle controls allow clock-like and analog stimulus signals to be generated from one circuit, and the low-impedance output reduces source-loading loss. Designers must add appropriate attenuation or amplification to obtain the receiver's required logic levels and must verify edge quality and bandwidth in the particular test standard.
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Automated Production Test
The MAX038CWP+ can supply programmable stimulus in legacy automated test systems because frequency is controlled by an external resistor-capacitor network and multiple waveform formats are available. Its 0.1Hz-to-20MHz span covers slow sweeps through fast digital-edge simulations. A production fixture should compensate for timing-component tolerances, calibrate output level at the load, and add protection so an unexpected test-board fault cannot overdrive the legacy output buffer.
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Frequency Sweep Systems
MAX038CWP+ supports frequency sweep up to 85%, making it applicable to swept-response testing of filters, amplifiers, resonators, and sensors. Triangle and sawtooth outputs can provide repeatable ramp stimuli, while sine output can probe continuous-frequency response. The sweep behavior depends on the external timing network and control implementation, so evaluate sweep linearity, endpoint accuracy, and sweep rate at the target circuit rather than relying only on the headline 85% figure.
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Pulse and Timing Signal Generation
The MAX038CWP+ produces square and pulse waveforms with independently adjustable duty cycle up to 85%, making it suitable for clock, gate-delay, pulse-width, and general timing tests. Its buffered 0.1-ohm output can feed a logic translator or comparator stage, but the resulting edge rate and amplitude still depend on device bandwidth and loading. When driving modern digital inputs, use an appropriate translator, account for threshold levels, and confirm that the generator supply and output swing meet the receiving device requirements.
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추천 제품 요약
엔지니어링 참조 데이터: MAX038CWP+ — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
설계 노트
Use the supply voltage and bypass requirements published in the official MAX038 datasheet; they were not present in the supplied search snippets and are therefore not guessed here. Keep the decoupling network short and place it close to the device according to the manufacturer layout guidance. Because the part is obsolete, preserve the original reference design when possible and inspect aged components for increased leakage or degraded capacitance.
Place the external frequency-setting resistor and capacitor as close as practical to their associated MAX038CWP+ pins to reduce parasitic pickup and timing error. Maintain the 20-pin SOIC footprint exactly as documented; do not assume MAX038EWP+ or MAX038CPP+ uses the same land pattern without checking package drawings. Preserve the original ground-return path and keep high-level switching nodes away from waveform and timing nodes.
Do not treat a same-series MPN or an aggregator similarity score as proof of drop-in compatibility. For an existing board, compare the official pin table, package dimensions, electrical limits, temperature grade, and exposed functionality of MAX038CWP+ against any proposed substitute. Also verify timing-component values and output amplitude against the original schematic because functional equivalence does not guarantee complete system equivalence.
규정 준수 정보
No explicit compliance statements were included in the verified web data. Automotive qualification is not applicable to the stated general-purpose function-generator application.
