LTC2242IUP-10 - 10-Bit, 250Msps ADC, Industrial Temp | Analog Devices
MPN: LTC2242IUP-10 ✓ Hoạt độngLTC2242IUP-10 Tóm tắt
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples a continuous-time analog voltage and produces a quantized digital code. The 250 Msps class belongs to the high-speed pipelined ADC family, used in applications where bandwidth, latency, and dynamic range must be balanced. Within the broader taxonomy, LTC2242IUP-10 is a member of: ADC -> data converter -> mixed-signal IC -> semiconductor. Pipeline ADCs are the workhorse of communications, radar, and test instrumentation front ends.
Key differentiating specifications include 60.5 dB SNR and 78 dB SFDR for high-frequency signal capture, 1.2 GHz full-power input bandwidth that exceeds the Nyquist limit and simplifies front-end anti-aliasing, and selectable LVDS / CMOS / demultiplexed CMOS output modes for direct FPGA or ASIC interfacing. The integrated encode clock duty-cycle stabilizer relaxes clock-source jitter requirements, easing system timing design.
The device uses a multi-stage switched-capacitor pipeline architecture with on-chip reference and sample-and-hold, enabling low-latency conversion at full sample rate. Industrial temperature grade (-40C to +85C) and 9x9 mm exposed-pad QFN-64 package support dense PCB layouts with effective thermal dissipation up to 740 mW.
Typical applications include cellular base-station receivers, cable modem head-ends, test and measurement digitizers, medical imaging, and high-speed radar digitizing front ends. The LVDS output mode is preferred for >150 MHz clock distribution and EMC-sensitive designs.
When designing, route analog and digital grounds separately and stitch them only at the exposed pad; place a 2.2 uF X7R bypass close to the supply pins. The encode input should be AC-coupled with the on-chip 100 ohm termination engaged to preserve SNR.
This page synthesizes distributor pricing, drop-in alternatives, and design notes not consolidated on the manufacturer datasheet, giving engineers a single-page reference for selection and sourcing.
Bộ thay thế dễ dàng lắp đặt cho LTC2242IUP-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 LTC2242IUP-10 (cùng hình factor và footprint) — khác nhau ở Architecture, Output Interface, Package, Sample Rate.
LTC2242CUP-10#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2242IUP-12#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2241IUP-12#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2240IUP-10#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2221CUP#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2227IUH#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2142IUP-14#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2242IUP-10 Tỷ lệ tối đa & tính chất điện
| Architecture | Pipelined ADC |
| Độ phân giải | 10 bit |
| Sample Rate | 250 Msps (250000 kSamples/s) |
| Number of Inputs | 1 |
| Input Bandwidth (Full Power) | 1.2 GHz |
| SNR | 60.5 dB |
| SFDR | 78 dB |
| Điện áp cung cấp | 2.5 V (single) |
| Power Dissipation | 740 mW |
| Output Interface | LVDS, CMOS, or Demultiplexed CMOS |
| Hộp | QFN-64 (9x9 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Khoảng nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Sample-and-Hold | Integrated |
| Encode Input | Single-ended, 100 ohm internal termination |
Cấu hình chân LTC2242IUP-10
| Chân 1 | AIN — Analog input (single-ended, 50 ohm matched) |
| Chân 2 | SENSE — Reference mode select (ground for internal reference) |
| Chân 3 | VREF — Reference voltage bypass |
| Chân 4 | REFT — Reference top bypass |
| Chân 5 | REFB — Reference bottom bypass |
| Chân 6 | VD — Digital supply 2.5V |
| Chân 7 | OGND — Output ground (digital) |
| Chân 8 | D0+/D0- — LVDS data output bit 0 (differential) |
| Chân 9 | D1+/D1- — LVDS data output bit 1 (differential) |
| Chân 10 | D2+/D2- — LVDS data output bit 2 (differential) |
| Chân 11 | D3+/D3- — LVDS data output bit 3 (differential) |
| Chân 12 | D4+/D4- — LVDS data output bit 4 (differential) |
| Chân 13 | ENC+/ENC- — Encode clock input (differential, 100 ohm termination) |
| Chân 14 | D5+/D5- — LVDS data output bit 5 (differential) |
| Chân 15 | D6+/D6- — LVDS data output bit 6 (differential) |
| Chân 16 | D7+/D7- — LVDS data output bit 7 (differential) |
| Chân 17 | D8+/D8- — LVDS data output bit 8 (differential) |
| Chân 18 | D9+/D9- — LVDS data output bit 9 (differential) |
| Chân 19 | OVD — Output driver supply |
| Chân 20 | OGND — Output ground |
| Chân 21 | VA — Analog supply 2.5V |
| Chân 22 | GND — Analog ground |
| Chân 23-32 | NC — Not connected (per datasheet) |
| Chân 33-40 | NC — Not connected (per datasheet) |
| Chân 41-48 | NC — Not connected (per datasheet) |
| Chân 49-56 | NC — Not connected (per datasheet) |
| Chân 57-62 | NC — Not connected (per datasheet) |
| Chân 63 | VA — Analog supply 2.5V |
| Chân 64 | GND — Analog ground (also exposed pad) |
Ứng dụng tiêu biểu
LTC2242IUP-10 phù hợp cho 6 Áp dụngs: Cellular Base-Station Receiver Digitizer, Digital Oscilloscope Front End, Cable Modem Head-End Digitizer, Medical Ultrasound Beamformer Receiver, Spectrum Analyzer IF Digitizer, Radar and Lidar Pulse Digitizer.
Cellular Base-Station Receiver Digitizer
The LTC2242IUP-10's 250 Msps sample rate and 78 dB SFDR make it ideal for digitizing the 70-140 MHz intermediate frequency (IF) stages of WCDMA / LTE base-station receivers. With 1.2 GHz full-power input bandwidth, the ADC can under-sample high IFs without an external anti-aliasing filter, simplifying the receiver chain. Placed between the SAW filter and the digital downconverter FPGA, the 10-bit resolution is sufficient for capturing the signal envelope at the required carrier-to-noise ratio. Power dissipation of 740 mW from a single 2.5 V supply keeps thermal design tractable in sealed outdoor radio units.
Được đề xuất
Digital Oscilloscope Front End
The LTC2242IUP-10 suits low-end digital oscilloscope and data-acquisition front ends where 250 Msps real-time sampling is required to capture single-shot transients. Its 1.2 GHz analog input bandwidth lets the scope accurately display signals up to the fifth harmonic of the rated bandwidth. The LVDS output mode streams data to a downstream FPGA at 250 MHz DDR with low EMI. Compared with a 12-bit ADC, the 10-bit LTC2242IUP-10 trades vertical resolution for speed, enabling more channels per FPGA at lower system cost in modular oscilloscope designs.
Được đề xuất
Cable Modem Head-End Digitizer
In DOCSIS 3.0 / 3.1 cable modem termination systems (CMTS) and upstream burst receivers, the LTC2242IUP-10 samples the upstream 5-65 MHz band at 250 Msps, providing more than 4x oversampling for accurate QAM demodulation. The 60.5 dB SNR comfortably exceeds the 38 dB requirement for 256-QAM, while 78 dB SFDR captures the wide dynamic range of aggregated upstream channels. Placed after the upstream AGC stage, the ADC feeds an FPGA-based burst demodulator. The 740 mW power is acceptable for head-end rack-mount equipment with forced-air cooling.
Được đề xuất
Medical Ultrasound Beamformer Receiver
The LTC2242IUP-10 digitizes RF echo signals in the 1-15 MHz band of medical ultrasound beamformer receivers. Its 1.2 GHz bandwidth comfortably captures the higher harmonics needed for harmonic imaging, and 250 Msps enables a deep field of view without range ambiguities. The 78 dB SFDR is critical for distinguishing low-contrast tissue features from fundamental and harmonic leakage. Each channel in a phased-array probe uses one ADC; the QFN-64 footprint allows high channel density on the receiver board.
Được đề xuất
Spectrum Analyzer IF Digitizer
Wideband spectrum analyzers and signal intercept receivers use the LTC2242IUP-10 to digitize the final IF stage after a swept local oscillator. At 250 Msps, the ADC provides 125 MHz instantaneous bandwidth per Nyquist zone. Combined with 78 dB SFDR, this enables detection of low-level spurs adjacent to large signals. The device's duty-cycle-stabilized encode input relaxes the requirement on the LO-derived clock, lowering BOM cost. Industrial temperature grade supports portable and field-deployed spectrum analyzers.
Được đề xuất
Radar and Lidar Pulse Digitizer
The LTC2242IUP-10 captures return pulses in short-range radar and lidar receivers. Its 1.2 GHz bandwidth preserves the rise time of sub-nanosecond pulses, while 250 Msps provides sufficient temporal resolution for time-of-flight ranging to within 2 meters. The 60.5 dB SNR supports detection of weak return signals against noise, critical for automotive and industrial ranging applications. LVDS outputs feed an FPGA that performs pulse detection and time-stamping in real time.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2242IUP-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#PBF | LTC2242IUP-12#PBF | LTC2241IUP-12#PBF | LTC2240IUP-10#PBF | LTC2221CUP#PBF | LTC2227IUH#PBF | LTC2142IUP-14#PBF |
|---|---|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | QFN-64 (9x9 mm) | QFN-64 (9x9 mm) - same | QFN-64 (9x9 mm) - same | QFN-64 (9x9 mm) - same | QFN-64 (9x9 mm) - same | QFN-64 (9x9 mm) - same | QFN-64 (9x9 mm) - same | QFN-64 (9x9 mm) - same |
| Resolution | 10 bit | 10 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 14 bit |
| Sample Rate | 250 Msps | 250 Msps | 185 Msps | 185 Msps | 105 Msps | 135 Msps | 105 Msps | 80 Msps |
| Supply Voltage | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 3.3 V | 3.3 V | 2.5 V |
| Operating Temperature | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
Bảo phân biệt quan trọng
- Highest sample rate in the LTC224x 10-bit QFN-64 family (vsLTC2240IUP-10#PBF)
- Industrial temperature grade included by default (vsLTC2242CUP-10#PBF)
- 1.2 GHz full-power analog bandwidth exceeds 12-bit peers (vsLTC2142IUP-14#PBF)
Ghi chú thiết kế
Use a four-layer PCB stack-up with continuous ground plane on layer 2 directly beneath the LTC2242IUP-10. Solder the exposed pad (pin 64) to this ground plane with at least 9 thermal vias (0.3 mm drill, 1.0 mm pitch) to keep junction temperature below 125C at 740 mW dissipation. Keep analog input trace to pin 1 less than 5 mm and surround it with ground pours on both sides; route LVDS outputs with 100 ohm differential impedance and match lengths within 150 mil.
Bypass each VA pin (2, 21, 63) with a 2.2 uF X7R 0402 ceramic plus a 0.1 uF NP0 ceramic placed within 2 mm of the pin. Add a ferrite bead between the analog supply and the noisy digital 2.5 V rail to isolate the reference and sample-and-hold from digital switching noise. Per the Analog Devices LTC2242-10 datasheet, supply ripple above 10 mVpp at the encode clock frequency will couple into the analog input and degrade SNR by 1-2 dB.
Do not DC-couple the encode clock; AC-couple with 100 nF capacitors and engage the on-chip 100 ohm differential termination by leaving the ENC mode pin floating. Failing to engage termination causes severe reflections that corrupt clock edges and degrade SNR by up to 5 dB. Also avoid routing the encode clock in parallel with LVDS outputs - keep at least 3 line-widths of separation to prevent crosstalk into the digital data bus.
Thông tin tuân thủ
RoHS and REACH compliant per Analog Devices product page. PBF suffix denotes lead-free terminal finish. AEC-Q100 qualification is not applicable for this commercial/industrial ADC - no automotive Q-grade variant exists in this family.
