TMC2340AH5C - 16-Bit Dual DDS, 20 MHz | onsemi
Référence : TMC2340AH5C ✓ ActifTMC2340AH5C Présentation
A DDS is a synthesizer architecture that advances a phase accumulator by a programmable phase increment on every input clock cycle. Unlike a traditional analog-tuned oscillator, its frequency and phase are represented digitally, allowing deterministic frequency changes without retuning a physical resonator. In the TMC2340A family, this architecture supports waveform synthesis, modulation, and demodulation while producing matched quadrature outputs for downstream I/Q processing.
The principal features of the TMC2340AH5C include two simultaneous 16-bit DAC-format outputs, a 15-bit amplitude value, a 32-bit phase-increment tuning word, and a maximum clock input of 20 MHz. The amplitude and phase controls provide programmable signal adjustment, while the quadrature sine-and-cosine format supports complex-signal generation. The 5 V operating range is appropriate for systems that standardize internal digital and mixed-signal logic on a 5 V rail.
Technically, the TMC2340AH5C combines digital phase accumulation with a waveform-generation stage that converts the selected phase and amplitude values into offset-binary output data. When driven by a periodic TTL clock, the device automatically advances through the selected waveform. The 32-bit tuning word gives a fine digital phase increment, while the 16-bit output resolution limits quantization to 16 bits per quadrature channel. The reported 20 MHz clock specification is the principal rate parameter for system timing and output-update calculations.
Typical uses include communications test equipment, local-oscillator generation, modulation and demodulation blocks, arbitrary waveform generation, digital frequency synthesis, and I/Q signal-chain development. The matched sine and cosine outputs are especially useful when a downstream converter or RF chain requires two phase-related baseband signals.
The primary design consideration is power sequencing. Because the specified supply range is only 4.75 V to 5.25 V, the device must not be exposed to voltage outside that range. Designers should also verify the complete pin assignment, clock jitter tolerance, output loading, and package-routing requirements against the manufacturer datasheet before laying out a 121-PPGA board.
This product record combines the verified manufacturer-description parameters, distributor availability, package information, and current pricing while clearly identifying missing pin-level and lifecycle details. It also provides application guidance and comparison parameters without presenting unverified substitute parts as drop-in replacements.
Alternatives de remplacement direct pour TMC2340AH5C — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Aucune alternative de remplacement direct disponible pour ce produit.
Demander des alternativesTMC2340AH5C Spécifications
| Product Type | Direct Digital Synthesis IC |
| Device Function | Waveform synthesis, modulation, and demodulation |
| Architecture | Direct digital synthesis |
| Supply Voltage Range | 4.75 V to 5.25 V |
| Fréquence d'horloge maximale | 20 MHz |
| Clock Input Signal | TTL clock |
| Output Resolution | 16 bit |
| Output Channels | 2 quadrature-matched sine and cosine channels |
| Output Format | 16-bit DAC-compatible offset binary |
| Amplitude Word Width | 15 bit |
| Phase Increment Width | 32 bit |
| Tuning Word Width | 32 bit |
| Boîtier | 121-PPGA (34.16 mm x 34.16 mm) |
| Type de montage | Surface Mount |
| Manufacturer | Fairchild Semiconductor, now onsemi |
Guide de configuration des broches du TMC2340AH5C 121-ppga (34.16 mm x 34.16 mm)
Configuration des broches du TMC2340AH5C (boîtier 121-ppga (34.16 mm x 34.16 mm)). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour TMC2340AH5C.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
TMC2340AH5C convient pour 6 applications: Communications Test Signal Generation, Local Oscillator and Frequency Synthesis, I/Q Baseband Signal Creation, Modulation Signal Generation, Arbitrary Waveform Test Systems, Demodulation and Reference Channels.
Communications Test Signal Generation
The TMC2340AH5C fits communications test equipment that requires deterministic quadrature excitation from a digital source. Its two matched 16-bit sine and cosine outputs are generated from a TTL clock, a 15-bit amplitude value, and a 32-bit phase-increment value, providing a direct way to create phase-related baseband signals for receiver and transmitter characterization. The 20 MHz maximum clock supports a defined update rate, while the DAC-compatible offset-binary format can feed downstream digital-to-analog conversion. Board designers must preserve the 4.75 V to 5.25 V supply range and validate the complete 121-PPGA footprint, clock timing, and output loading before committing to the design.
Local Oscillator and Frequency Synthesis
The TMC2340AH5C is applicable where a digitally controlled local oscillator must produce sine and cosine outputs with a programmable phase increment. The 32-bit tuning word permits fine numerical control of phase accumulation, while the paired outputs provide the quadrature relationship required by many I/Q architectures. A 20 MHz TTL clock establishes the synthesis update rate. Unlike an analog oscillator whose tuning range depends on component tolerances and temperature, the DDS approach represents the frequency relationship directly in the digital phase increment. The implementation still requires filtering, gain control, reference-clock design, and careful verification of the 5 V supply and large 121-PPGA routing requirements.
I/Q Baseband Signal Creation
The TMC2340AH5C can supply phase-matched sine and cosine data for an I/Q baseband test or modulation chain. Its dual 16-bit DAC-compatible outputs share the same synthesis process, helping maintain the intended 90-degree relationship before external analog processing. The user controls signal amplitude through 15 bits and phase progression through a 32-bit phase-increment word, enabling deterministic changes without retuning an analog resonator. The device operates from 4.75 V to 5.25 V and accepts a TTL clock up to 20 MHz. Designers should budget output filtering, converter interface timing, clock jitter analysis, and PCB resources for the 34.16 mm by 34.16 mm package.
Modulation Signal Generation
The TMC2340AH5C is suitable for modulation systems that require programmable waveform data generated from a stable digital reference. The manufacturer identifies modulation and demodulation as core TMC2340A functions, and the matched 16-bit sine and cosine outputs provide two related signal channels for downstream mixing or analysis. Programmable amplitude and phase-increment values allow signal conditions to be changed numerically rather than by physical retuning. The 20 MHz clock ceiling determines the available update rate, while the 4.75 V to 5.25 V supply range simplifies compatibility with 5 V logic but requires careful rail regulation. Practical implementation also depends on verified pin functions, clock quality, output filtering, and system-level calibration.
Arbitrary Waveform Test Systems
The TMC2340AH5C can serve as the waveform-generation element in test systems that need synchronized sine and cosine channels. Each output is represented in a 16-bit DAC-compatible offset-binary format, allowing the digital outputs to feed external converter stages or downstream processing. The 15-bit amplitude control provides signal-level adjustment, and the 32-bit phase-increment word provides fine frequency and phase programming. The 20 MHz maximum input clock establishes the timing basis for the direct digital synthesis process. Because the verified information does not supply a complete pin map, schematic capture must be checked against the manufacturer datasheet, especially for clock, data, synchronization, and analog-output connections.
Demodulation and Reference Channels
The TMC2340AH5C can support demodulation systems that require two stable, phase-related reference waveforms. Its direct digital synthesis architecture generates matched sine and cosine channels using a TTL reference clock and programmed phase increment, allowing the same numerical control used for signal generation to establish local reference signals. This is useful when a system must reproduce a known quadrature relationship deterministically. The 16-bit output resolution and 15-bit amplitude control define the digital signal granularity, while the 20 MHz clock rate determines the maximum update cadence. Integration requires validation of clock jitter, output latency, filtering, grounding, supply sequencing, and the unusual 121-PPGA board-space requirement.
Données de référence d'ingénierie pour TMC2340AH5C — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit |
|---|---|
| Product Type | Direct Digital Synthesis IC |
| Brand | onsemi |
| Package | 121-PPGA (34.16 mm x 34.16 mm) |
| Supply Voltage Range | 4.75 V to 5.25 V |
| Maximum Clock Frequency | 20 MHz |
| Output Resolution | 16 bit |
| Amplitude Word Width | 15 bit |
| Phase Increment Width | 32 bit |
| Output Channels | 2 quadrature-matched sine and cosine channels |
| Output Format | 16-bit DAC-compatible offset binary |
Principaux différenciateurs
- Matched quadrature waveform generation (vs No verified drop-in alternative)
- Fine digital phase control (vs No verified drop-in alternative)
- Integrated modulation and demodulation positioning (vs No verified drop-in alternative)
- High-resolution dual output format (vs No verified drop-in alternative)
Notes de conception
The verified operating range is 4.75 V to 5.25 V. Provide a regulated 5 V rail with low transient disturbance and verify startup, shutdown, and frequency-change behavior across the complete permitted range. Do not infer tolerance beyond the published limits, and confirm the manufacturer requirements for sequencing and decoupling before assigning the power architecture.
The 121-PPGA package measures 34.16 mm by 34.16 mm, so board area and routing density must be evaluated early. Use the manufacturer's land pattern and pin table directly. Place any required clock and interface routing away from noisy switching stages, and route the TTL reference clock with controlled impedance and minimal coupling to unrelated signals.
DDS output quality depends on reference-clock jitter, output loading, reconstruction filtering, and quantization. Before setting a modulation or test-signal requirement, evaluate the 20 MHz clock source, account for the 16-bit output resolution, and determine whether external DAC-compatible circuitry and reconstruction filters are required. A valid output waveform requires system-level analysis beyond the raw digital outputs.
Do not treat a functionally similar DDS IC as a drop-in substitute without verifying the 121-PPGA land pattern, pin names, supply requirements, clock interface, output encoding, and timing. The supplied cross-reference results identify search tools but no confirmed equivalent. In particular, TMC2340AH5C1 appears in a datasheet search result without enough verified data to establish compatibility with TMC2340AH5C.
Informations de conformité
The supplied verified sources do not provide product-specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements. AEC-Q100 is not applicable because this is an integrated circuit rather than an automotive-qualified device, and no AEC-Q100 qualification is stated.
