LTC2241CUP-12 - 12-Bit 210Msps ADC | Analog Devices | 64-QFN
N.º de pieza: LTC2241CUP-12 ✓ Activo| Cant. | Precio unitario | 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 Descripción general
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.
Alternativas directas para LTC2241CUP-12 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con LTC2241CUP-12 (mismo factor de forma y huella) — difiere en Aperture Jitter, Package, SNR, RoHS Status, Architecture.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
LTC2241IUP-12
✅ Sustitución directa✓ En stock
$34.5 / unidad
Ver hoja de datos →LTC2241CUP-12#PBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC2241CUP-12#TRPBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LTC2240IUP-12
✅ Sustitución directa✓ En stock
$25.4 / unidad
Ver hoja de datos →LTC2242IUP-12
✅ Sustitución directa✓ En stock
$47.1 / unidad
Ver hoja de datos →LTC2241CUP-12 Valores máximos y características eléctricas
| Manufacturer | Analog Devices (Linear Technology) |
| Part Number | LTC2241CUP-12 |
| Función | 12-bit, 210 Msps pipelined ADC |
| Resolución | 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 |
| Encapsulado | 64-pin QFN (9 mm x 9 mm) with EPAD |
| Tipo de montaje | Surface Mount |
| Temperature Grade | Commercial (C) |
| Lead-Free / RoHS | Yes (PBF suffix, RoHS compliant) |
Configuración de pines de LTC2241CUP-12
| Pin 1 | GND — Ground (analog ground reference) |
| Pin 2 | VCM — Common-mode voltage bias output |
| Pin 3 | AIN+ — Differential analog input, positive |
| Pin 4 | AIN- — Differential analog input, negative |
| Pin 5 | SENSE — Full-scale input range select |
| Pin 6 | GND — Ground |
| Pin 7 | VDD — Analog 3.3 V supply |
| Pin 8 | GND — Ground |
| Pin 9 | VDD — Analog 3.3 V supply |
| Pin 10 | GND — Ground |
| Pin 11 | ENC+ — Encode (clock) input, positive |
| Pin 12 | ENC- — Encode (clock) input, negative |
| Pin 13 | GND — Ground |
| Pin 14 | OE — Output enable (active low) |
| Pin 15 | OVDD — Output driver supply |
| Pin 16 | OGND — Output ground |
| Pin 17 | D0 — Data output bit 0 (LSB) |
| Pin 18 | D1 — Data output bit 1 |
| Pin 19 | D2 — Data output bit 2 |
| Pin 20 | D3 — Data output bit 3 |
| Pin 21 | D4 — Data output bit 4 |
| Pin 22 | D5 — Data output bit 5 |
| Pin 23 | D6 — Data output bit 6 |
| Pin 24 | D7 — Data output bit 7 |
| Pin 25 | D8 — Data output bit 8 |
| Pin 26 | D9 — Data output bit 9 |
| Pin 27 | D10 — Data output bit 10 |
| Pin 28 | D11 — Data output bit 11 (MSB) |
| Pin 29 | OGND — Output ground |
| Pin 30 | OVDD — Output driver supply |
| Pin 31 | OGND — Output ground |
| Pin 32 | CLKOUT — Data-ready clock output |
| Pin 33 | OVDD — Output driver supply |
| Pin 34 | OGND — Output ground |
| Pin 35 | OVDD — Output driver supply |
| Pin 36 | OGND — Output ground |
| Pin 37 | OVDD — Output driver supply |
| Pin 38 | OGND — Output ground |
| Pin 39 | OVDD — Output driver supply |
| Pin 40 | OGND — Output ground |
| Pin 41 | RAND — Data randomizer enable |
| Pin 42 | DCS — Duty-cycle stabilizer enable |
| Pin 43 | OGND — Output ground |
| Pin 44 | OVDD — Output driver supply |
| Pin 45 | OGND — Output ground |
| Pin 46 | OVDD — Output driver supply |
| Pin 47 | OGND — Output ground |
| Pin 48 | OVDD — Output driver supply |
| Pin 49 | OGND — Output ground |
| Pin 50 | OVDD — Output driver supply |
| Pin 51 | OGND — Output ground |
| Pin 52 | OVDD — Output driver supply |
| Pin 53 | OGND — Output ground |
| Pin 54 | OVDD — Output driver supply |
| Pin 55 | OGND — Output ground |
| Pin 56 | GND — Ground |
| Pin 57 | VDD — Analog 3.3 V supply |
| Pin 58 | GND — Ground |
| Pin 59 | VDD — Analog 3.3 V supply |
| Pin 60 | GND — Ground |
| Pin 61 | VDD — Analog 3.3 V supply |
| Pin 62 | GND — Ground |
| Pin 63 | BIAS — Bias pin (tie with external resistor to GND) |
| Pin 64 | NC — Not connected (per datasheet) |
Aplicaciones típicas
LTC2241CUP-12 es adecuado para 6 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LTC2241CUP-12 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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) |
Diferenciadores clave
- Industrial-temperature-grade drop-in upgrade in the same 64-QFN package (frente a LTC2241CUP-12 (base))
- Higher-speed 250 Msps pin-compatible upgrade (frente a LTC2241CUP-12 (base))
- Lower-speed 185 Msps pin-compatible substitute (frente a LTC2241CUP-12 (base))
Notas de diseño
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.
Información de cumplimiento
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.
