LTC2241CUP-10 - 10-Bit 210Msps ADC, 64-QFN | Analog Devices
MPN: LTC2241CUP-10 ✓ Hoạt độngLTC2241CUP-10 Tóm tắt
An ADC (analog-to-digital converter) is a semiconductor device that converts continuous-time analog signals into discrete digital codes for downstream processing by DSPs, microcontrollers, or FPGAs. Within the converter family hierarchy, the LTC2241-10 belongs to the pipelined-architecture sub-type, which uses multiple low-resolution stages to balance sample rate and resolution, sitting between successive-approximation (SAR) converters (low speed, high accuracy) and flash converters (very high speed, low resolution). Pipelined ADCs dominate the 10-200 Msps + 8-16 bit design space used in communications infrastructure, medical imaging, and test equipment.
Key features include selectable input ranges of ±0.5 V or ±1 V, no-missing-codes guaranteed over the full operating range, optional clock duty-cycle stabilizer for jitter-sensitive systems, and dedicated shutdown/nap power-saving modes. The 64-QFN package integrates the exposed pad for thermal dissipation and a clean analog/digital ground split. The data-ready output clock simplifies downstream FPGA data capture timing.
Typical applications include cellular base-station receiver IF digitizers, cable-headend downstream/upstream QAM demodulators, digital oscilloscope front ends, medical ultrasound beam-former channels, radar/sonar IF sampling, and software-defined radio (SDR) platforms where wideband undersampling is required. The pin-compatible LTC2242-10 family member extends the offering to 250 Msps for systems that need extra timing headroom on the same PCB layout.
Bộ thay thế dễ dàng lắp đặt cho LTC2241CUP-10 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với LTC2241CUP-10 (cùng hình factor và footprint) — khác nhau ở Package, Sample Rate, SFDR, SNR, Power Dissipation.
LTC2242CUP-10
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2240IUP-10
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2221CUP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2241CUP-10 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 10 bit |
| Sample Rate | 210 Msps |
| Architecture | Pipelined |
| Number of Channels | 1 |
| SNR | 60.5 dB |
| SFDR | 78 dB |
| Aperture Jitter | 95 fs RMS |
| Full Power Input Bandwidth | 1.2 GHz |
| Điện áp cung cấp | 2.5 V (single) |
| Power Dissipation | 585 mW |
| Phạm vi điện áp đầu vào | ±0.5 V or ±1 V (selectable) |
| Output Interface | LVDS / CMOS / Demultiplexed CMOS |
| No Missing Codes | Guaranteed |
| Clock Duty Cycle Stabilizer | Optional |
| Power-Saving Modes | Shutdown and Nap |
| Data Ready Output Clock | Yes |
| Hộp | 64-QFN (9x9 mm) UP |
| Kiểu lắp đặt | Surface Mount |
| Operating Temperature (Commercial) | 0C to +70C |
Cấu hình chân LTC2241CUP-10
| Chân 1 | GND — Analog ground |
| Chân 2 | AIN+ — Differential analog input positive |
| Chân 3 | AIN- — Differential analog input negative |
| Chân 4 | VCM — Common-mode voltage bypass |
| Chân 5 | SENSE — Input range select (ground=±1V, VREF=±0.5V) |
| Chân 6 | VREF — Internal reference decoupling |
| Chân 7 | VDD — 2.5 V analog supply |
| Chân 8 | OGND — Output driver ground |
| Chân 9 | OVDD — Output driver supply |
| Chân 10 | CLK+ — Differential sample clock positive |
| Chân 11 | CLK- — Differential sample clock negative |
| Chân 12 | DRDY — Data ready output clock |
| Chân 13 | CS — CMOS / LVDS mode select |
| Chân 14 | OF — Output format select |
| Chân 15 | SHUTDN — Shutdown pin (active high) |
| Chân 16 | NAP — Nap power-save mode |
| Chân 17 | DCS — Duty cycle stabilizer enable |
| Chân 18 | D0-D9 — 10-bit LVDS/CMOS data outputs (representative pin) |
| Chân 19 | OGND — Output ground (multiple pins) |
| Chân 20 | OVDD — Output driver supply (multiple pins) |
Ứng dụng tiêu biểu
LTC2241CUP-10 phù hợp cho 6 Áp dụngs: Cellular Base-Station IF Sampling, Cable Headend QAM Demodulation, Digital Oscilloscope Front End, Medical Ultrasound Beam-Former, Radar / Sonar IF Sampling, Software-Defined Radio (SDR) Platform.
Cellular Base-Station IF Sampling
The LTC2241CUP-10 fits cellular base-station IF digitizers because its 60.5 dB SNR, 78 dB SFDR, and 95 fs RMS aperture jitter enable accurate undersampling of 100-300 MHz intermediate frequencies. A 1.2 GHz full-power bandwidth lets one ADC cover multiple IF bands without an analog mixer chain. Placed between the receiver mixer and the baseband DSP/FPGA, it operates from a single 2.5 V rail at 585 mW, simplifying power-tree design.
Được đề xuất
Cable Headend QAM Demodulation
The LTC2241CUP-10 is well-suited to QAM demodulators in cable headend equipment where 78 dB SFDR captures densely-packed QAM constellations with low EVM. Selectable ±0.5 V / ±1 V input ranges tune the ADC to the upstream/downstream line-driver output level. LVDS outputs feed a downstream FPGA running DOCSIS channel-bonding logic without requiring a high-pin-count capture ASIC.
Được đề xuất
Digital Oscilloscope Front End
The LTC2241CUP-10 serves as a per-channel ADC in mid-bandwidth oscilloscope front ends where 210 Msps and 1.2 GHz analog bandwidth exceed the Nyquist need for many general-purpose measurements. A pipelined architecture with no-missing-codes guarantees 10-bit integrity across the full-scale range. The 64-QFN 9x9 mm footprint allows dense multi-channel layouts with adjacent trace isolation.
Được đề xuất
Medical Ultrasound Beam-Former
In medical ultrasound beam-former channels, the LTC2241CUP-10 provides 210 Msps sampling sufficient for 30-40 MHz harmonic imaging IF frequencies. Ultralow 95 fs RMS jitter preserves low-contrast lesion detectability by minimizing aperture-jitter noise on weak echoes. The shutdown/nap modes enable per-channel power gating between transmit pulses to reduce patient-warming thermal budget.
Được đề xuất
Radar / Sonar IF Sampling
The LTC2241CUP-10 suits radar and sonar IF sampling where ultralow jitter and high SFDR preserve target-detection dynamic range. 78 dB SFDR ensures spurs from large clutter returns do not mask small Doppler-shifted targets. The 64-QFN exposed pad handles continuous 585 mW dissipation across wide operating-temperature envelopes in ruggedized enclosures.
Được đề xuất
Software-Defined Radio (SDR) Platform
Software-defined radio platforms benefit from the LTC2241CUP-10's wide input bandwidth and ultralow jitter, enabling direct undersampling of HF-to-L-band RF stages and reducing analog mixing stages. LVDS output pair to FPGA fabrics (Xilinx, Lattice) running GNU Radio or vendor DSP libraries, with the data-ready output clock simplifying capture-FIFO timing closure.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2241CUP-10 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | LTC2242CUP-10 | LTC2240IUP-10 | LTC2221CUP |
|---|---|---|---|---|
| Package | 64-QFN (UP, 9x9 mm) | 64-QFN (UP, 9x9 mm) - same | 64-QFN (UP, 9x9 mm) - same | 64-QFN (UP, 9x9 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit |
| Sample Rate | 210 Msps | 250 Msps (+19%) | 105 Msps (-50%) | 65 Msps (-69%) |
| SNR | 60.5 dB | 60.5 dB | 60.5 dB | 61 dB |
| SFDR | 78 dB | 78 dB | 78 dB | 78 dB |
| Supply Voltage | 2.5 V | 2.5 V | 2.5 V | 3.3 V |
| Temperature Grade | Commercial 0C to +70C | Commercial 0C to +70C | Industrial -40C to +85C | Commercial 0C to +70C |
Bảo phân biệt quan trọng
- Wide-bandwidth single-channel pipeline at 210 Msps in 64-QFN (vsLTC2221CUP)
- Pin-compatible with LTC2242-10 family (vsLTC2242CUP-10)
- Industrial temperature drop-in option (vsLTC2240IUP-10)
Ghi chú thiết kế
Separate analog and digital ground planes are mandatory for the 64-QFN (UP) footprint; join at a single point under the exposed pad. Route differential clock (CLK+/CLK-) and differential analog inputs (AIN+/AIN-) as 100-ohm differential pairs with length-matched traces within 1 mm. Keep the analog input traces away from the LVDS/CMOS output buses by at least 3 trace widths.
Bypass each VDD pin with a 0.1 uF ceramic plus a 10 uF tantalum placed within 5 mm of the pin. The exposed pad must be soldered to a continuous ground plane with thermal vias (typically 9 vias in a 3x3 array under the 9x9 mm pad) to keep junction temperature within the 0C-70C commercial envelope at 585 mW continuous dissipation.
Drive the CLK+/CLK- differential clock with a low-jitter source (typical 95 fs RMS contribution target). Avoid using an FPGA LVDS output as the clock source unless you measure its jitter with a phase-noise analyzer; even good FPGA LVDS drivers can add 200-500 fs RMS that combines with the ADC aperture jitter to degrade SNR at high input frequencies.
Estimated: at 585 mW dissipation, with theta_JA approximately 30 C/W on a 4-layer JEDEC test PCB, junction temperature rises ~17.5 C above ambient. Continuous operation at +70C ambient places the junction at ~87.5 C, comfortably below the 150 C maximum. Derate the sample rate or duty cycle if a sealed enclosure pushes ambient above 70 C.
Do not leave the SENSE pin floating; tie to GND for ±1 V range or to VREF for ±0.5 V range. Avoid enabling the duty cycle stabilizer when the input clock already has stable 50% duty cycle, as DCS can inject deterministic spurs. Verify the SHUTDN pin returns low during normal operation, as a logic-high residual disables the ADC output.
Thông tin tuân thủ
RoHS compliant per Analog Devices product page. Commercial temperature grade (0C to +70C). Industrial temperature variants (LTC2240IUP-10) available in the same package for -40C to +85C operation.
