LTC2241CUP-12 - 12-Bit 210Msps ADC | Analog Devices | 64-QFN
Référence : LTC2241CUP-12 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $47.5 | $47,50 |
| 10 | $42.75 | $427,50 |
| 100 | $38.2 | $3 820,00 |
| 500 | $33.85 | $16 925,00 |
| 1 000 | $30.1 | $30 100,00 |
LTC2241CUP-12 Présentation
A pipelined ADC is a high-speed data converter architecture that uses multiple low-resolution flash stages in cascade to digitize an analog input at sample rates from tens of megasamples per second to over a gigasample per second. Pipelined ADCs trade slightly higher latency for the ability to convert very wide analog input bandwidths, and they are the workhorse of communications infrastructure, oscilloscopes, and software-defined radio front ends. The LTC2241CUP-12 belongs to the broader hierarchy of ADC -> data converter -> signal chain IC -> mixed-signal semiconductor.
Key specifications include 12-bit native resolution, 210 Msps guaranteed conversion rate, 65.5 dB SNR, 78 dB SFDR, 95 fs-RMS jitter, and an integrated input PGA that is bypassable for full-scale input ranges of 1.0 Vp-p to 1.6 Vp-p. The differential analog input is sampled on a clock edge from an external CMOS/LVDS/TTL-compatible encode input, and the output is an offset-binary or two's-complement parallel CMOS bus. A separate output supply (OVDD) lets the digital bus interface directly to 1.8 V to 3.3 V logic.
Architecturally, the LTC2241CUP-12 uses 12 pipelined 1.5-bit stages with proprietary digital error correction, providing both gain and offset trim registers for system-level calibration. An optional clock duty-cycle stabilizer maintains stable internal bias across varying encode duty cycles, and an optional data-randomizer reduces on-board EMI by spreading the switching noise of the output bus over a wider frequency range.
Typical applications include cellular basestation IF sampling, cable-headend digitizers, radar and EW receivers, spectrum analyzer and oscilloscope front ends, and medical ultrasound beamformers. In each of these, the part's combination of 78 dB SFDR and 95 fs-RMS jitter preserves dynamic range even when undersampling high-IF carriers.
When laying out the PCB, treat the 64-QFN exposed pad as the primary thermal path and bond it to a continuous ground plane with low-inductance vias to suppress digital switching noise coupling back into the analog input. Provide separate analog and digital supply domains and decouple them with ferrite beads rather than sharing a single ground pour.
Alternatives de remplacement direct pour LTC2241CUP-12 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec LTC2241CUP-12 (même facteur de forme et même empreinte) — différant par Aperture Jitter, Package, SNR, RoHS Status, Architecture.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
LTC2241IUP-12
✅ Remplacement direct✓ En stock
$34.5 / unité
Voir la fiche technique →LTC2241CUP-12#PBF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC2241CUP-12#TRPBF
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LTC2240IUP-12
✅ Remplacement direct✓ En stock
$25.4 / unité
Voir la fiche technique →LTC2242IUP-12
✅ Remplacement direct✓ En stock
$47.1 / unité
Voir la fiche technique →LTC2241CUP-12 Valeurs maximales et caractéristiques électriques
| Manufacturer | Analog Devices (Linear Technology) |
| Part Number | LTC2241CUP-12 |
| Fonction | 12-bit, 210 Msps pipelined ADC |
| Résolution | 12 bits |
| Sample Rate | 210 Msps |
| Number of Input Channels | 1 (differential) |
| Architecture | Pipelined (1.5-bit/stage) with digital error correction |
| SNR | 65.5 dB |
| SFDR | 78 dB |
| Aperture Jitter | 95 fs-RMS |
| Input Range (Full-Scale) | 1.0 Vp-p to 1.6 Vp-p (PGA-bypassed) |
| Analog Supply (VDD) | 3.3 V (typical) |
| Output Supply (OVDD) | 1.8 V to 3.3 V |
| Digital Output | Parallel CMOS, offset binary or two's complement |
| Encode Input | CMOS/LVDS/TTL-compatible, single-ended |
| Optional Features | Data randomizer, clock duty-cycle stabilizer |
| Boîtier | 64-pin QFN (9 mm x 9 mm) with EPAD |
| Type de montage | Surface Mount |
| Temperature Grade | Commercial (C) |
| Lead-Free / RoHS | Yes (PBF suffix, RoHS compliant) |
Configuration des broches de LTC2241CUP-12
| Broche 1 | GND — Ground (analog ground reference) |
| Broche 2 | VCM — Common-mode voltage bias output |
| Broche 3 | AIN+ — Differential analog input, positive |
| Broche 4 | AIN- — Differential analog input, negative |
| Broche 5 | SENSE — Full-scale input range select |
| Broche 6 | GND — Ground |
| Broche 7 | VDD — Analog 3.3 V supply |
| Broche 8 | GND — Ground |
| Broche 9 | VDD — Analog 3.3 V supply |
| Broche 10 | GND — Ground |
| Broche 11 | ENC+ — Encode (clock) input, positive |
| Broche 12 | ENC- — Encode (clock) input, negative |
| Broche 13 | GND — Ground |
| Broche 14 | OE — Output enable (active low) |
| Broche 15 | OVDD — Output driver supply |
| Broche 16 | OGND — Output ground |
| Broche 17 | D0 — Data output bit 0 (LSB) |
| Broche 18 | D1 — Data output bit 1 |
| Broche 19 | D2 — Data output bit 2 |
| Broche 20 | D3 — Data output bit 3 |
| Broche 21 | D4 — Data output bit 4 |
| Broche 22 | D5 — Data output bit 5 |
| Broche 23 | D6 — Data output bit 6 |
| Broche 24 | D7 — Data output bit 7 |
| Broche 25 | D8 — Data output bit 8 |
| Broche 26 | D9 — Data output bit 9 |
| Broche 27 | D10 — Data output bit 10 |
| Broche 28 | D11 — Data output bit 11 (MSB) |
| Broche 29 | OGND — Output ground |
| Broche 30 | OVDD — Output driver supply |
| Broche 31 | OGND — Output ground |
| Broche 32 | CLKOUT — Data-ready clock output |
| Broche 33 | OVDD — Output driver supply |
| Broche 34 | OGND — Output ground |
| Broche 35 | OVDD — Output driver supply |
| Broche 36 | OGND — Output ground |
| Broche 37 | OVDD — Output driver supply |
| Broche 38 | OGND — Output ground |
| Broche 39 | OVDD — Output driver supply |
| Broche 40 | OGND — Output ground |
| Broche 41 | RAND — Data randomizer enable |
| Broche 42 | DCS — Duty-cycle stabilizer enable |
| Broche 43 | OGND — Output ground |
| Broche 44 | OVDD — Output driver supply |
| Broche 45 | OGND — Output ground |
| Broche 46 | OVDD — Output driver supply |
| Broche 47 | OGND — Output ground |
| Broche 48 | OVDD — Output driver supply |
| Broche 49 | OGND — Output ground |
| Broche 50 | OVDD — Output driver supply |
| Broche 51 | OGND — Output ground |
| Broche 52 | OVDD — Output driver supply |
| Broche 53 | OGND — Output ground |
| Broche 54 | OVDD — Output driver supply |
| Broche 55 | OGND — Output ground |
| Broche 56 | GND — Ground |
| Broche 57 | VDD — Analog 3.3 V supply |
| Broche 58 | GND — Ground |
| Broche 59 | VDD — Analog 3.3 V supply |
| Broche 60 | GND — Ground |
| Broche 61 | VDD — Analog 3.3 V supply |
| Broche 62 | GND — Ground |
| Broche 63 | BIAS — Bias pin (tie with external resistor to GND) |
| Broche 64 | NC — Not connected (per datasheet) |
Applications typiques
LTC2241CUP-12 convient pour 6 applications: Cellular Basestation IF Sampling, Cable-Headend Digitizer, Radar and EW Receiver Front-End, Spectrum Analyzer and Oscilloscope Front-End, Software-Defined Radio Receiver, Medical Ultrasound Beamformer.
Cellular Basestation IF Sampling
The LTC2241CUP-12 fits cellular basestation IF sampling because its 65.5 dB SNR and 78 dB SFDR at 210 Msps preserve the modulation fidelity of multicarrier LTE and 5G NR signals after downconversion. The ultralow 95 fs-RMS aperture jitter maintains SNR when undersampling high-IF carriers, which minimizes the size of the analog front-end filter. Versus an equivalent 14-bit part, the LTC2241-12 cuts ADC cost by roughly 3x while still meeting the dynamic-range targets for observation receivers and diversity channels in macro and small-cell basestations.
Recommandé
Cable-Headend Digitizer
The LTC2241CUP-12 is well matched to cable-headend QAM and OFDM digitizers because 78 dB SFDR keeps spurious energy out of adjacent channels in dense DOCSIS 3.1 spectrum plans, and 210 Msps is exactly the right oversample rate for headend channelization. The integrated PGA simplifies the analog front-end by allowing the full-scale input range to be set to 1.0 Vp-p or 1.6 Vp-p, matching the gain of the headend amplifier chain without an external attenuator. Compared with a flash ADC, the pipelined architecture here gives equivalent sample rate with much lower power consumption.
Recommandé
Radar and EW Receiver Front-End
Radar and electronic-warfare receivers require ADCs that can directly sample wideband IF while preserving instantaneous dynamic range, and the LTC2241CUP-12's 78 dB SFDR plus 95 fs-RMS jitter allows IF undersampling of L-band and S-band radar returns without degrading pulse fidelity. The parallel CMOS output interface simplifies routing to an FPGA-based pulse compressor, where deterministic digital output timing is critical for matched-filter processing. For higher-frequency EW designs, the pin-compatible LTC2242IUP-12 (250 Msps) provides extra bandwidth without changing the PCB layout.
Recommandé
Spectrum Analyzer and Oscilloscope Front-End
The LTC2241CUP-12 suits bench-instrument front-ends because 78 dB SFDR keeps spurious responses at least 12 dB below the noise floor of a 12-bit measurement, while 65.5 dB SNR is sufficient for general-purpose oscilloscope and spectrum-analyzer channels. The 1.0-1.6 Vp-p programmable input range lets the same PCB accept different probe attenuators without changing the analog chain. Used with a wideband ADC driver such as the LT6607, the LTC2241-12 forms the core of an affordable 200 Msps digital-storage channel.
Recommandé
Software-Defined Radio Receiver
Software-defined radio receivers digitize directly at the antenna or after a single downconversion, and the LTC2241CUP-12's combination of 210 Msps and 95 fs-RMS jitter supports direct sampling of HF and lower-VHF SDR tuners. The optional internal data randomizer reduces EMI on the parallel CMOS outputs, easing FCC/CE compliance for the SDR enclosure. Combined with an FPGA that performs channelization in digital logic, the LTC2241-12 enables a compact, low-power multi-band SDR without separate receivers for each band.
Recommandé
Medical Ultrasound Beamformer
The LTC2241CUP-12 fits medical ultrasound beamformers because the 210 Msps sample rate accommodates 40 MHz-bandwidth transducers and the 78 dB SFDR preserves the contrast between soft-tissue echoes. The pipelined latency of a few clock cycles is compatible with digital beamformer pipelines, and the CMOS output bus directly interfaces to the FPGA that combines N channels into the beamformed image. Operating from a 3.3 V analog supply keeps the analog chain quiet enough to meet medical-imaging noise-floor targets.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LTC2241CUP-12 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | LTC2241IUP-12 | LTC2241CUP-12#PBF | LTC2241CUP-12#TRPBF | LTC2240IUP-12 | LTC2242IUP-12 |
|---|---|---|---|---|---|---|
| Package | 64-QFN (UP) 9x9 mm | 64-QFN (UP) - same | 64-QFN (UP) - same | 64-QFN (UP) - same | 64-QFN (UP) - same | 64-QFN (UP) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sample Rate | 210 Msps | 210 Msps | 210 Msps | 210 Msps | 185 Msps (-12%) | 250 Msps (+19%) |
| Temperature Grade | Commercial (C) | Industrial (I) | Commercial (C) | Commercial (C) | Industrial (I) | Industrial (I) |
Principaux différenciateurs
- Industrial-temperature-grade drop-in upgrade in the same 64-QFN package (vs LTC2241CUP-12 (base))
- Higher-speed 250 Msps pin-compatible upgrade (vs LTC2241CUP-12 (base))
- Lower-speed 185 Msps pin-compatible substitute (vs LTC2241CUP-12 (base))
Notes de conception
Estimated: ground and supply the LTC2241CUP-12 through a single, unbroken ground plane directly under the exposed pad, and stitch the analog and digital grounds together only at the EPAD. The encode (ENC+/-) trace pair must be 50-ohm characteristic impedance and matched within 25 mil to keep timing skew low; use a differential clock driver such as an LVDS buffer rather than routing from a TTL/CMOS GPIO to avoid injecting common-mode jitter into the encode path.
Estimated: provide separate analog (VDD = 3.3 V) and digital (OVDD = 1.8-3.3 V) supplies, and isolate the two domains with a ferrite bead rather than a shared 3.3 V rail. Decouple each VDD pin with a 0.1 uF ceramic in parallel with a 4.7 uF or 10 uF low-ESR ceramic placed within 3 mm of the pin. The OVDD outputs switch 12 bits at the encode rate and inject a large step current every cycle, so sufficient bulk decoupling on OVDD is required to keep digital supply noise below 50 mVpk-pk.
Estimated: route the 12-bit parallel CMOS outputs with a 50-ohm characteristic-impedance trace, and match length across all D0-D11 bits to within 0.5 mm to keep the output timing window inside the destination FPGA's setup/hold budget at 210 Msps. The CLKOUT trace should be routed at 50 ohms to the FPGA clock pin and terminated at the receiver side; avoid long CLKOUT stubs which reflect and corrupt the data-ready edge timing. Enable the optional duty-cycle stabilizer (DCS) if the encode clock duty cycle deviates from 50% by more than 5%.
Do not let the analog input common-mode voltage drift more than +/- 50 mV from the VCM pin voltage; use the on-chip VCM to bias the LT6607 or LTC6409 driver output to avoid saturating the input sampling capacitors. Also, the BIAS pin sets the internal bias current and must be tied through a 1 kohm 1% resistor to ground; do not short BIAS to ground directly or the on-chip references will drift. Finally, do not enable both the data randomizer (RAND) and duty-cycle stabilizer (DCS) if the system clock already has clean 50% duty - either feature alone is sufficient.
Informations de conformité
RoHS and lead-free compliance per #PBF / #TRPBF part-number suffixes. AEC-Q100 not applicable - this is a commercial/industrial ADC, not a qualified automotive-grade part.
