DF1760U/1K - 20-Bit Stereo Sigma-Delta ADC, 28-SOIC | TI
Référence : DF1760U/1K ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $7.85 | $7,85 |
| 10 | $6.95 | $69,50 |
| 100 | $5.85 | $585,00 |
| 500 | $4.95 | $2 475,00 |
| 1 000 | $4.2 | $4 200,00 |
DF1760U/1K Présentation
A Sigma-Delta ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution and excellent noise performance. Sigma-Delta converters are widely used in audio applications, precision measurement, and industrial sensors where high dynamic range and low distortion are required. Within the signal chain hierarchy, the DF1760U/1K sits at the conversion stage between analog front-end conditioning and digital signal processing, converting analog inputs into a high-fidelity 20-bit serial digital stream.
The DF1760U/1K integrates a dual 20-bit monolithic modulator (PCM1760) together with a monolithic decimation filter, supporting dual-channel operation. The 28-pin SOIC package provides a commercial-grade temperature rating suitable for audio equipment, professional recording interfaces, and high-end instrumentation. The Multi-Bit Enhanced Noise Shaping topology delivers THD+N performance comparable to premium audio converters while maintaining the simplicity of a single-chip solution.
Typical applications for the DF1760U/1K include professional audio interfaces, high-end consumer audio DAC/ADC chains, digital mixing consoles, precision measurement instrumentation, and industrial data acquisition where 20-bit resolution and low distortion are required. The device is especially suited for systems that demand low noise and high linearity in a compact surface-mount form factor.
When designing with the DF1760U/1K, pay attention to power supply decoupling and clock jitter, as sigma-delta converters are sensitive to supply noise and timing inaccuracies. Use a low-jitter master clock and place decoupling capacitors close to the supply pins. The device accepts balanced or single-ended analog inputs depending on external configuration; consult the manufacturer datasheet for input topology and recommended front-end circuitry.
This page synthesizes distributor stock and pricing, drop-in replacement alternatives, and practical design notes not consolidated in the manufacturer datasheet, helping engineers evaluate the DF1760U/1K against modern equivalents and confirm its suitability for new designs or legacy field support.
Alternatives de remplacement direct pour DF1760U/1K — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
DF1760U
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
PCM1760U
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
DF1760P
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
DF1760U/1K Valeurs maximales et caractéristiques électriques
| Résolution | 20 bit |
| Number of Channels | 2 (stereo) |
| Architecture | Sigma-Delta (Multi-Bit Enhanced Noise Shaping) |
| THD+N (typical) | -92 dB |
| THD+N (maximum) | -90 dB |
| Nominal Supply Voltage | 5 V |
| Maximum Supply Current | 55 mA |
| Interface | Serial |
| Boîtier | 28-SOIC (SOP-28, 0.209" / 5.30 mm width) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27 mm |
| Package Code | SOP |
| Temperature Grade | Commercial |
| Type de montage | Surface Mount |
| Integrated Modulator | PCM1760 dual 20-bit modulator |
| Internal Decimation Filter | Yes |
Guide de configuration des broches du DF1760U/1K sop
Configuration des broches du DF1760U/1K (boîtier sop). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour DF1760U/1K.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
DF1760U/1K convient pour 7 applications: Professional Audio ADC Interface, Digital Mixing Console ADC Stage, Industrial Precision Data Acquisition, High-End Consumer Audio Recording, Medical Instrumentation Signal Chain, Test and Measurement Instrumentation, Musical Instrument and Effects Processing.
Professional Audio ADC Interface
The DF1760U/1K suits professional audio ADC interfaces requiring 20-bit resolution with -92 dB THD+N typical. The dual-channel sigma-delta architecture captures left and right audio simultaneously at the audio interface's master clock rate, delivering a serial I2S-compatible bitstream that downstream DSP or sample-rate-converter ICs can process. The integrated PCM1760 modulator and monolithic decimation filter simplify board layout by eliminating external analog anti-alias stages. Commercial temperature grade supports studio and broadcast environments. As of 2026-10-13, this remains a viable solution for repairing legacy professional recording interfaces where 20-bit resolution meets the original dynamic-range specification and the SOIC-28 footprint is fixed.
Recommandé
Digital Mixing Console ADC Stage
Inside digital mixing consoles, the DF1760U/1K can be used as the stereo ADC stage feeding digital bus channels. Its 20-bit resolution and low THD+N preserve headroom and channel separation while keeping the BOM count low. The 28-SOIC package fits the standard channel-strip PCB land pattern used in late-1990s and early-2000s consoles. Sigma-delta noise shaping pushes quantization noise outside the audio band, allowing simple post-processing. The 5 V single supply and 55 mA max current simplify power tree design across many parallel channels. Engineering teams maintaining legacy consoles on the field will find this part directly compatible with original channel cards.
Recommandé
Industrial Precision Data Acquisition
Beyond audio, the DF1760U/1K can serve in industrial precision data acquisition front ends where 20-bit resolution and dual-channel simultaneous sampling are required. The sigma-delta noise shaping provides inherent anti-alias filtering, simplifying the analog input chain. The serial digital output eases isolation through digital isolators, important in noisy industrial environments. The 5 V supply tolerance aligns with common industrial 5 V rails derived from 24 V bus converters. Note that industrial designs should validate the commercial temperature grade against the deployment environment. As of 2026-10-13, this part is best used for legacy industrial equipment support rather than new platform designs.
Recommandé
High-End Consumer Audio Recording
The DF1760U/1K powers high-end consumer audio recording devices such as CD-recorder front ends, DAT recorder ADC stages, and early-generation prosumer recording interfaces. Its 20-bit resolution was state-of-the-art at product launch and remains adequate for many consumer playback and recording use cases. The integrated decimation filter eliminates the need for external digital filter ASICs, reducing total system cost. Combined with low-jitter master clock sources, it achieves THD+N below -90 dB, comfortably exceeding CD-quality requirements. Modern replacements deliver 24-bit performance but require PCB redesign - making the DF1760U/1K a practical choice for product refreshes that must preserve the existing analog front end.
Recommandé
Medical Instrumentation Signal Chain
In medical instrumentation, the DF1760U/1K can form part of legacy patient monitoring and diagnostic equipment ADC stages where dual-channel simultaneous sampling and 20-bit resolution are sufficient. The sigma-delta architecture provides inherent noise rejection that complements analog filtering in ECG, EEG, and similar low-frequency signal acquisition channels. The serial output simplifies galvanic isolation, important for patient-connected medical devices. Commercial temperature grade restricts use to controlled clinical environments rather than ambulatory or home-care deployments. Engineering teams servicing legacy medical equipment value the long-term availability of the DF1760U/1K through authorized distributors for as long as stock lasts.
Recommandé
Test and Measurement Instrumentation
The DF1760U/1K appears in test and measurement instruments such as audio analyzers, signal generators with ADC monitoring, and acoustic measurement systems where 20-bit resolution and low distortion matter. The integrated PCM1760 modulator simplifies the analog signal path and the decimation filter removes the burden of designing external digital filtering. Combined with low-jitter clocking, the converter delivers the linearity required for production-line audio test equipment. Engineering teams maintaining legacy audio analyzers will find this part well-suited for in-house calibration and repair, while new instrument designs should consider modern 24-bit delta-sigma converters for higher dynamic range.
Recommandé
Musical Instrument and Effects Processing
The DF1760U/1K integrates into musical instrument and effects processing hardware, including digital guitar effects processors, synthesizers with audio inputs, and electronic drum modules. Its dual-channel ADC accepts stereo instrument input, while the low THD+N preserves the nuances of analog instrument signals during analog-to-digital conversion. The sigma-delta noise shaping places quantization noise above the audible band, keeping the audio passband clean. Commercial temperature grade suits stage and studio environments. Legacy effect pedal designers and boutique synth builders continue to specify this part for reissue projects where faithful reproduction of vintage digital audio paths is desired.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour DF1760U/1K — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | DF1760U | PCM1760U | DF1760P | PCM1808PWR | PCM1862DBTR |
|---|---|---|---|---|---|---|
| Package | 28-SOIC (SOP-28) | 28-SOIC (SOP-28) - same | 28-SOIC (SOP-28) - same | 28-PDIP (DIP-28) - through-hole | 16-TSSOP - different footprint | 30-TSSOP - different footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Resolution | 20 bit | 20 bit | 20 bit | 20 bit | 24 bit | 24 bit |
| THD+N (typ) | -92 dB | -92 dB | -92 dB | -92 dB | -96 dB (better) | -98 dB (better) |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 3.3 V | 3.3 V |
| Architecture | Sigma-Delta (Multi-Bit Enhanced Noise Shaping) | Sigma-Delta (same) | Sigma-Delta (modulator only) | Sigma-Delta (same) | Sigma-Delta (modern) | Sigma-Delta (modern) |
| Channels | 2 (stereo) | 2 (stereo) | 2 (stereo modulator) | 2 (stereo) | 2 (stereo) | 2 (stereo) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Active | Active |
Principaux différenciateurs
- Integrated dual modulator + decimation filter in one chip (vs PCM1808PWR)
- Multi-bit enhanced noise shaping for low THD+N (vs PCM1760U)
- Single 5 V supply simplifies power design (vs PCM1808PWR)
Notes de conception
The DF1760U/1K operates from a single 5 V supply drawing up to 55 mA. Place a 10 uF bulk tantalum or ceramic capacitor and a 100 nF decoupling ceramic as close as possible to the supply pin. Sigma-delta ADCs are sensitive to supply noise - keep the analog and digital supply traces short and separate from high-current switching nodes. A linear regulator (e.g. LM7805 or LP38690) feeding the ADC is preferable to a switching converter unless followed by additional LC filtering.
Route analog inputs and clock traces away from digital outputs to prevent coupling of high-frequency switching edges into the analog front end. Use a continuous ground plane under the device, and place the analog input traces over the ground plane to form a controlled-impedance transmission path. The master clock trace should be as short as practical; keep its return path unbroken to minimize radiated emissions. Place decoupling capacitors on the same side as the IC, with vias to the ground plane directly at the capacitor pads.
Master clock jitter directly degrades sigma-delta ADC dynamic range. Use a low-jitter clock source (crystal oscillator rather than RC, or a clean PLL output) with jitter below 50 ps RMS. Excessive clock jitter manifests as elevated THD+N and reduced effective resolution. If the application requires -92 dB THD+N at full audio bandwidth, budget clock jitter carefully and verify the clock source's phase noise profile at offsets from 1 Hz to 100 kHz.
Estimated: at 5 V supply and 55 mA maximum, the DF1760U/1K dissipates approximately 275 mW. The 28-SOIC package has a thermal resistance of approximately 70 C/W theta_JA on a standard JEDEC test board, giving a junction-to-ambient rise of about 19 C at full load - well within safe operating limits. The commercial temperature grade (0 C to +70 C) restricts use to controlled environments; do not specify this part for industrial or automotive applications without first confirming manufacturer support for the temperature range.
Informations de conformité
Compliance data not explicitly listed in the provided web sources. DF1760U/1K is commercial temperature grade; not automotive qualified. RoHS/REACH status should be confirmed with Texas Instruments directly for production-bound designs.
