LTC2242CUP-10 - 10-Bit 250Msps ADC, 64-QFN | Analog Devices
N.º da peça: LTC2242CUP-10 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $48.5 | $48,50 |
| 10 | $43.65 | $436,50 |
| 100 | $38.8 | $3.880,00 |
| 500 | $34.92 | $17.460,00 |
| 1.000 | $31 | $31.000,00 |
LTC2242CUP-10 Visão geral
What is a high-speed pipelined ADC? A pipelined analog-to-digital converter is a converter architecture that uses multiple low-resolution flash stages in cascade, with each stage converting a portion of the input while the next stage samples the residue. This architecture achieves high sample rates (tens to hundreds of Msps) at moderate resolution (8-14 bits) with low latency and small die area. Pipelined ADCs sit in the hierarchy: ADC -> data converter -> signal chain IC -> semiconductor. They are the workhorse of communications infrastructure, radar, and test instrumentation where digitizing IF/RF signals at high dynamic range is required.
Key differentiating specifications include 95 fsRMS aperture jitter (enabling excellent IF undersampling noise performance), 1.2 GHz full-power input bandwidth, and 740 mW typical power dissipation. The pipelined core is preceded by a wideband track-and-hold, supporting AC-coupled or DC-coupled single-ended differential inputs through an external driver. A separate output supply (1.5 V to 3.3 V) decouples the noisy digital supply from the analog domain.
Typical applications include cellular basestation receivers, cable modem head-ends, radar and lidar digitizers, medical imaging front-ends, and high-speed data acquisition cards. The 78 dB SFDR makes the LTC2242-10 particularly suitable for multi-carrier communications where intermodulation distortion directly limits channel capacity.
When designing with this device, allocate a quiet analog ground plane and decouple AVDD with 10 uF tantalum in parallel with 0.1 uF ceramic placed within 5 mm of the supply pins. The exposed thermal pad must be soldered to a ground copper pour of at least 1 square inch to keep junction temperature rise within safe limits at full 250 Msps operation.
Alternativas drop-in para LTC2242CUP-10 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com LTC2242CUP-10 (mesmo formato e footprint) — diferindo em Package, Sample Rate, Architecture, Resolution, SNR.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
LTC2242IUP-10
✅ Drop-In✓ Em estoque
$18.5 / unidade
Ver ficha técnica →LTC2242CUP-10#PBF
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC2241CUP-10
✅ Drop-In✓ Em estoque
$24.84 / unidade
Ver ficha técnica →LTC2240CUP-10
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
LTC2241IUP-12
✅ Drop-In✓ Em estoque
$34.5 / unidade
Ver ficha técnica →LTC2242CUP-10 Classificações máximas e características elétricas
| Resolução | 10 bit |
| Sample Rate | 250 Msps |
| Number of Input Channels | 1 |
| Architecture | Pipelined |
| Input Type | Single-ended / Differential (with external driver) |
| SNR | 60.5 dB |
| SFDR | 78 dB |
| Aperture Jitter | 95 fsRMS |
| Full-Power Input Bandwidth | 1.2 GHz |
| Analog Supply Voltage | 2.5 V |
| Output Supply Voltage | 1.5 V to 3.3 V |
| Power Dissipation | 740 mW |
| Output Interface | LVDS / CMOS / Demultiplexed CMOS |
| Temperatura de operação | 0 C to +70 C (Commercial, C grade) |
| Encapsulamento | 64-QFN (9x9 mm) with exposed pad |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant (PBF suffix) |
Configuração de pinos do LTC2242CUP-10
| Pino 1 | INA+ — Differential analog input positive |
| Pino 2 | INA- — Differential analog input negative |
| Pino 3 | CLK+ — Sample clock input positive |
| Pino 4 | CLK- — Sample clock input negative |
| Pino 5 | GND — Analog ground |
| Pino 6 | AVDD — Analog 2.5V supply |
| Pino 7 | AVDD — Analog 2.5V supply |
| Pino 8 | VREF — Voltage reference decoupling |
| Pino 9 | SENSE — Reference mode select (AVDD/ground) |
| Pino 10 | GND — Analog ground |
| Pino 11 | OF- — Output format select (active low) |
| Pino 12 | MODE — LVDS/CMOS mode select |
| Pino 13 | OVDD — Output driver supply (1.5V-3.3V) |
| Pino 14 | GND — Digital ground |
| Pino 15 | OE — Output enable |
| Pino 16 | D0-/D0 — LVDS data output bit 0 (or CMOS) |
| Pino 17 | D1-/D1 — LVDS data output bit 1 |
| Pino 18 | D2-/D2 — LVDS data output bit 2 |
| Pino 19 | D3-/D3 — LVDS data output bit 3 |
| Pino 20 | D4-/D4 — LVDS data output bit 4 |
| Pino 21 | D5-/D5 — LVDS data output bit 5 |
| Pino 22 | D6-/D6 — LVDS data output bit 6 |
| Pino 23 | D7-/D7 — LVDS data output bit 7 |
| Pino 24 | D8-/D8 — LVDS data output bit 8 |
| Pino 25 | D9-/D9 — LVDS data output bit 9 (LSB) |
| Pino 26 | NC — Not connected (per datasheet) |
| Pino 27 | OVDD — Output driver supply |
| Pino 28 | GND — Digital ground |
| Pino 29 | NC — Not connected (per datasheet) |
| Pino 30 | NC — Not connected (per datasheet) |
| Pino 31 | NC — Not connected (per datasheet) |
| Pino 32 | GND — Digital ground |
| Pino 33 | NC — Not connected (per datasheet) |
| Pino 34 | NC — Not connected (per datasheet) |
| Pino 35 | OVDD — Output driver supply |
| Pino 36 | NC — Not connected (per datasheet) |
| Pino 37 | GND — Digital ground |
| Pino 38 | OVDD — Output driver supply |
| Pino 39 | NC — Not connected (per datasheet) |
| Pino 40 | DOR- — LVDS data out-of-range / overflow |
| Pino 41 | DOR+ — LVDS data out-of-range complement |
| Pino 42 | NC — Not connected (per datasheet) |
| Pino 43 | GND — Digital ground |
| Pino 44 | NC — Not connected (per datasheet) |
| Pino 45 | OVDD — Output driver supply |
| Pino 46 | NC — Not connected (per datasheet) |
| Pino 47 | NC — Not connected (per datasheet) |
| Pino 48 | GND — Digital ground |
| Pino 49 | NC — Not connected (per datasheet) |
| Pino 50 | NC — Not connected (per datasheet) |
| Pino 51 | OVDD — Output driver supply |
| Pino 52 | NC — Not connected (per datasheet) |
| Pino 53 | GND — Digital ground |
| Pino 54 | NC — Not connected (per datasheet) |
| Pino 55 | NC — Not connected (per datasheet) |
| Pino 56 | OVDD — Output driver supply |
| Pino 57 | AVDD — Analog 2.5V supply |
| Pino 58 | AVDD — Analog 2.5V supply |
| Pino 59 | GND — Analog ground |
| Pino 60 | GND — Analog ground |
| Pino 61 | VCM — Common-mode voltage output |
| Pino 62 | VREF — Voltage reference decoupling |
| Pino 63 | AVDD — Analog 2.5V supply |
| Pino 64 | AVDD — Analog 2.5V supply |
Aplicações típicas
LTC2242CUP-10 é adequado para 6 aplicaçãos: Cellular Basestation Receiver, Cable Modem Head-End / CMTS, Radar / Lidar Digitizer Front-End, Test & Measurement Instrumentation, Medical Ultrasound Imaging, Software Defined Radio (SDR) Platforms.
Cellular Basestation Receiver
The LTC2242CUP-10 is purpose-built for cellular basestation IF digitization, where it directly samples wideband intermediate-frequency signals without an analog downconversion stage. Its 1.2 GHz full-power input bandwidth and 95 fsRMS aperture jitter preserve signal-to-noise ratio for multi-carrier 4G/5G waveforms, while the 78 dB SFDR ensures spurious intermodulation products stay below the noise floor of adjacent channels. The 250 Msps sample rate accommodates 100 MHz+ of instantaneous bandwidth, and the LVDS output interface streams 10-bit data directly into an FPGA digital front-end (DFE) for channelization, decimation, and crest-factor reduction. Power dissipation of 740 mW at full rate is manageable in a forced-air cooled basestation chassis.
Recomendado
Cable Modem Head-End / CMTS
In cable modem termination systems (CMTS), the LTC2242CUP-10 digitizes the upstream 5-85 MHz band at high oversampling ratios, allowing digital channel bonding and DOCSIS 3.1 upstream OFDMA demodulation. The pipelined 250 Msps architecture with 10-bit resolution oversamples the upstream band by a factor of 3-5x, giving the FPGA receiver significant processing gain against ingress noise and impulse disturbances common in HFC plants. The CMOS output mode is preferred here to reduce FPGA pin count and BOM cost versus LVDS. The exposed-pad QFN-64 package is footprint-compatible with the broader LTC22xx family, enabling a common PCB for downstream (lower-rate) and upstream (higher-rate) paths.
Recomendado
Radar / Lidar Digitizer Front-End
The LTC2242CUP-10 is well suited to IF-digitization of radar and lidar receivers, where its 1.2 GHz analog input bandwidth and 78 dB SFDR enable direct sampling of pulsed-Doppler intermediate frequencies in the 100-500 MHz range. The 95 fsRMS aperture jitter preserves the time-domain accuracy of short-pulse returns critical for range resolution, while the wide bandwidth avoids aliasing of chirp-FM or spread-spectrum waveforms. For automotive and industrial lidar, the commercial temperature grade (0-70 C) is acceptable for in-cabin or controlled-enclosure installations; outdoor or under-hood automotive applications should use the LTC2242IUP-10 industrial variant. The exposed pad provides adequate thermal dissipation for continuous full-rate operation.
Recomendado
Test & Measurement Instrumentation
In wideband digital oscilloscopes, spectrum analyzers, and arbitrary waveform generator capture paths, the LTC2242CUP-10 provides a cost-effective 250 Msps digitizer for 100 MHz-class analog front-ends. The 10-bit dynamic range suits general-purpose bench instruments where 8-bit ENOB is acceptable, and the LVDS output mode simplifies routing to high-pin-count FPGAs implementing trigger logic and on-screen measurement DSP. The 1.2 GHz input bandwidth supports undersampling of microwave carriers for frequency-extension measurements, and the exposed-pad QFN package enables compact multi-channel card stacks. Commercial temperature grade is sufficient for lab/bench environments.
Recomendado
Medical Ultrasound Imaging
The LTC2242CUP-10 fits the front-end of portable and mid-range diagnostic ultrasound systems, where 64-256 channel beamformer arrays demand a compact, low-power per-channel ADC. The 250 Msps rate supports 50-100 MHz RF signal capture after the TGC amplifier, and 78 dB SFDR preserves harmonic image fidelity critical for B-mode and Doppler color flow imaging. The 740 mW per channel dissipation is manageable with forced-air chassis cooling. For premium cart-based systems requiring 12-14 bit dynamic range, upgrade to LTC2155CUP-12 or LTC2145CUP-12 in the same QFN-64 family footprint. Commercial temperature grade suits in-hospital deployment; industrial grade is recommended for ambulance/mobile use.
Recomendado
Software Defined Radio (SDR) Platforms
Wideband SDR platforms leverage the LTC2242CUP-10's 1.2 GHz input bandwidth and 95 fsRMS jitter to directly digitize HF/VHF/UHF signals without analog mixers, simplifying receiver architecture. The 78 dB SFDR enables simultaneous capture of multiple narrowband signals with minimal intermodulation distortion - critical for spectrum sensing and cognitive radio. The LVDS output mode streams 10-bit samples into an FPGA implementing digital downconversion, channelization, and demodulation. The exposed-pad QFN-64 package fits compact embedded SDR modules, and the commercial temperature grade suits indoor and laboratory SDR deployments. Power dissipation of 740 mW is competitive in battery-powered portable SDRs.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para LTC2242CUP-10 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | LTC2242IUP-10 | LTC2241CUP-10 | LTC2240CUP-10 | LTC2241IUP-12 |
|---|---|---|---|---|---|
| Package | 64-QFN (9x9 mm) | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit | 12 bit |
| Sample Rate (max) | 250 Msps | 250 Msps | 200 Msps | 150 Msps | 200 Msps |
| SNR | 60.5 dB | 60.5 dB | 61 dB (typical) | 61.5 dB (typical) | 65.5 dB (12-bit) |
| SFDR | 78 dB | 78 dB | 78 dB | 78 dB | 78 dB |
| Operating Temperature | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) |
Principais diferenciais
- Higher sample rate than the LTC2241CUP-10 (vs LTC2241CUP-10)
- Same QFN-64 footprint as the LTC2241IUP-12 for vertical resolution upgrade (vs LTC2241IUP-12)
- Industrial temperature variant available for harsh environments (vs LTC2242IUP-10)
Notas de projeto
Decouple AVDD (2.5V analog supply) with a 10 uF tantalum in parallel with 0.1 uF ceramic placed within 5 mm of each AVDD pin. OVDD (1.5-3.3V output supply) should be decoupled with 4.7 uF + 0.1 uF ceramic. Keep the AVDD and OVDD planes physically separated to prevent digital switching noise from coupling into the analog domain; use a ferrite bead between AVDD and OVDD if they share an upstream regulator. Estimated: a 4-layer FR-4 board with 1 oz copper dissipates 740 mW with approximately 25 C junction rise above ambient when the exposed pad is soldered to a 1 square inch copper pour.
Route the differential analog inputs (INA+, INA-) as a 100-ohm differential pair from the output of the front-end driver (e.g., a transformer or differential op-amp). Match lengths within 0.5 mm to preserve common-mode rejection. The CLK+ and CLK- lines are also differential; route them as a 100-ohm pair with length matching within 1 mm of each other and isolated from the analog inputs by at least 3x the dielectric thickness to minimize clock feedthrough. The exposed thermal pad must be soldered to a continuous ground copper pour with thermal vias (9 vias in a 3x3 array recommended) for heat extraction.
Do not leave unused LVDS/CMOS output pins floating - per the LTC2242-10 datasheet (document 224210f), all unused outputs should be tied to OVDD through 10 kohm resistors to prevent spurious switching. The SENSE pin selects internal vs external reference mode; tie SENSE to AVDD for internal reference (recommended for most applications) or to ground for external reference drive. Avoid driving CLK with a single-ended signal - the LTC2242CUP-10 requires a true differential clock (transformer-coupled PECL/LVDS) for rated jitter performance. Single-ended clocking will degrade SNR by 3-5 dB at high IF input frequencies.
Informações de conformidade
RoHS compliance is denoted by the #PBF suffix on the orderable part number. Per Analog Devices product page, the LTC2242-10 family is RoHS compliant. AEC-Q100 is not applicable - this is a commercial-grade ADC intended for industrial, communications, and test equipment. For automotive-qualified ADCs, see the AD925x family.
