LTC2295CUP - Dual 14-Bit, 10Msps Low Power 3V ADC | Analog Devices
MPN: LTC2295CUP ✓ Hoạt độngLTC2295CUP Tóm tắt
A pipelined ADC is a high-speed analog-to-digital converter architecture that processes the analog input through multiple low-resolution stage converters, then digitally corrects the result to produce a high-resolution output. This architecture enables sample rates in the tens to hundreds of megasamples per second while maintaining low power consumption. Within the broader signal chain hierarchy, a pipelined ADC sits between successive-approximation register (SAR) ADCs (which trade speed for power) and flash ADCs (which trade resolution for speed). The LTC2295CUP specifically targets the dual-channel, mid-speed, low-power segment used in communications infrastructure, imaging, and portable instrumentation.
Key performance features include 575 MHz full-power input bandwidth sample-and-hold, 110 dB channel-to-channel isolation, and a flexible input range up to 2 Vp-p. The device accepts a single-ended or differential analog input, supports multiplexed or separate data buses, and provides CMOS-compatible digital outputs. The integrated dual-channel architecture eliminates the need for two separate ADC ICs, saving board space and simplifying clock routing in multi-channel data-acquisition systems.
The LTC2295CUP is built on a BiCMOS process and uses a multi-stage pipelined architecture with digital error correction to achieve its 14-bit linearity. The wide input bandwidth (575 MHz) significantly exceeds the Nyquist frequency for 10 Msps operation, allowing AC performance to be maintained well beyond the first Nyquist zone - critical for undersampling IF signals in communications receivers. The architecture includes internal references and timing circuits, reducing external component count.
Typical applications include cellular base-station IF digitizing, ultrasound imaging front-ends, portable instrumentation, low-power radar signal acquisition, and dual-channel data acquisition systems. The combination of low power (120 mW), dual channels, and high AC performance makes the LTC2295CUP particularly suitable for handheld or battery-powered test equipment where dual-channel capability is required.
Designers should note that the LTC2295CUP requires careful analog input network design (typically a transformer-driver or op-amp driver with anti-alias filter) to fully realize the 74.4 dB SNR. The exposed pad must be soldered to the PCB ground plane for thermal dissipation and electrical performance. The CLK input requires a low-jitter source to maintain SNR at high input frequencies.
This page synthesizes distributor pricing from DigiKey and Mouser, drop-in same-package alternatives from the LTC22xx family, and practical design notes not found in the standalone manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho LTC2295CUP — 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 LTC2295CUP (cùng hình factor và footprint) — khác nhau ở Sample Rate, Package, RoHS Status, SFDR, SNR.
LTC2292CUP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2287CUP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2282CUP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2280CUP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2221CUP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2145CUP-12
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2295CUP Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 14 bits |
| Number of Channels | 2 (dual) |
| Sample Rate | 10 Msps |
| Architecture | Pipelined |
| Điện áp cung cấp | 3 V (single, 2.85V to 3.4V) |
| Power Consumption | 120 mW (typical) |
| SNR | 74.4 dB |
| SFDR | 90 dB |
| Channel Isolation | 110 dB |
| Full-Power Input Bandwidth | 575 MHz |
| Phạm vi điện áp đầu vào | Flexible up to 2 Vp-p |
| Khoảng nhiệt độ hoạt động | 0C to +70C (commercial) |
| Hộp | 64-QFN (9x9 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Data Output Bus | Multiplexed or separate |
| Output Logic | CMOS-compatible |
Cấu hình chân LTC2295CUP
| Chân 1 | VDD — 3V analog supply |
| Chân 2 | AGND — Analog ground |
| Chân 3 | INA+ — Channel A positive analog input |
| Chân 4 | INA- — Channel A negative analog input |
| Chân 5 | REFT — Top reference decoupling |
| Chân 6 | REFB — Bottom reference decoupling |
| Chân 7 | REFH — High reference voltage |
| Chân 8 | REFL — Low reference voltage |
| Chân 9 | AGND — Analog ground |
| Chân 10 | INB+ — Channel B positive analog input |
| Chân 11 | INB- — Channel B negative analog input |
| Chân 12 | AGND — Analog ground |
| Chân 13 | VDD — 3V analog supply |
| Chân 14 | OGND — Output driver ground |
| Chân 15 | DA0 — Channel A data output bit 0 (LSB) |
| Chân 16 | DA1 — Channel A data output bit 1 |
| Chân 17 | DA2 — Channel A data output bit 2 |
| Chân 18 | DA3 — Channel A data output bit 3 |
| Chân 19 | DA4 — Channel A data output bit 4 |
| Chân 20 | DA5 — Channel A data output bit 5 |
| Chân 21 | DA6 — Channel A data output bit 6 |
| Chân 22 | DA7 — Channel A data output bit 7 |
| Chân 23 | DA8 — Channel A data output bit 8 |
| Chân 24 | DA9 — Channel A data output bit 9 |
| Chân 25 | DA10 — Channel A data output bit 10 |
| Chân 26 | DA11 — Channel A data output bit 11 |
| Chân 27 | DA12 — Channel A data output bit 12 |
| Chân 28 | DA13 — Channel A data output bit 13 (MSB) |
| Chân 29 | OVDD — Output driver supply |
| Chân 30 | OGND — Output driver ground |
| Chân 31 | CLK — Clock input (true) |
| Chân 32 | CLK- — Clock input (complement) |
| Chân 33 | OGND — Output driver ground |
| Chân 34 | OVDD — Output driver supply |
| Chân 35 | DB13 — Channel B data output bit 13 (MSB) |
| Chân 36 | DB12 — Channel B data output bit 12 |
| Chân 37 | DB11 — Channel B data output bit 11 |
| Chân 38 | DB10 — Channel B data output bit 10 |
| Chân 39 | DB9 — Channel B data output bit 9 |
| Chân 40 | DB8 — Channel B data output bit 8 |
| Chân 41 | DB7 — Channel B data output bit 7 |
| Chân 42 | DB6 — Channel B data output bit 6 |
| Chân 43 | DB5 — Channel B data output bit 5 |
| Chân 44 | DB4 — Channel B data output bit 4 |
| Chân 45 | DB3 — Channel B data output bit 3 |
| Chân 46 | DB2 — Channel B data output bit 2 |
| Chân 47 | DB1 — Channel B data output bit 1 |
| Chân 48 | DB0 — Channel B data output bit 0 (LSB) |
| Chân 49 | OGND — Output driver ground |
| Chân 50 | OVDD — Output driver supply |
| Chân 51 | OF — Overflow output |
| Chân 52 | OGND — Output driver ground |
| Chân 53 | SHDN — Shutdown control (active high) |
| Chân 54 | MODE — Bus mode select |
| Chân 55 | VDD — 3V analog supply |
| Chân 56 | AGND — Analog ground |
| Chân 57 | NC — Not connected (per datasheet) |
| Chân 58 | NC — Not connected (per datasheet) |
| Chân 59 | NC — Not connected (per datasheet) |
| Chân 60 | NC — Not connected (per datasheet) |
| Chân 61 | VDD — 3V analog supply |
| Chân 62 | AGND — Analog ground |
| Chân 63 | VDD — 3V analog supply |
| Chân 64 | AGND — Analog ground |
Ứng dụng tiêu biểu
LTC2295CUP phù hợp cho 6 Áp dụngs: Cellular Base Station IF Digitizing, Portable Ultrasound Imaging Front-End, Radar IF Signal Acquisition, Multi-Channel Data Acquisition Systems, Communications Test Equipment, Industrial Imaging and Spectroscopy.
Cellular Base Station IF Digitizing
The LTC2295CUP is well-suited to digitizing intermediate-frequency (IF) signals in cellular base-station receivers where dual-channel I/Q sampling is required. With 10 Msps per channel, 74.4 dB SNR, and 90 dB SFDR, it captures IF signals at 70 MHz or 140 MHz with high fidelity for subsequent digital demodulation. The 575 MHz input bandwidth enables undersampling of higher-IF architectures, while the dual-channel integration eliminates the need for two separate ADC ICs and simplifies PCB layout. Place the device between the IF amplifier and the digital downconverter, with a bandpass anti-alias filter and ADC driver op-amp (such as the AD8138) ahead of each analog input.
Được đề xuất
Portable Ultrasound Imaging Front-End
The LTC2295CUP's dual 14-bit channels and 120 mW low power make it a strong fit for portable ultrasound beamformer front-ends. Each transducer channel pair requires simultaneous sampling, and the integrated dual-channel architecture saves board space in handheld ultrasound probes where PCB area is at a premium. The 74.4 dB SNR is sufficient to resolve the dynamic range of ultrasound echoes, while the 3V single-supply operation simplifies battery-powered design. Buffer each analog input with a low-noise op-amp and route the digital outputs to an FPGA-based beamformer.
Được đề xuất
Radar IF Signal Acquisition
The LTC2295CUP fits dual-channel radar IF acquisition at sample rates up to 10 Msps. The wide 575 MHz input bandwidth and 90 dB SFDR enable clean digitization of pulse-compressed radar returns across a wide dynamic range. For dual-polarization radar receivers, both channels of the LTC2295CUP simultaneously capture H and V polarization echoes. Use a transformer-coupled input network with anti-alias filtering to fully realize the 74.4 dB SNR. Power consumption of 120 mW keeps the thermal footprint manageable in densely populated radar receiver boards.
Được đề xuất
Multi-Channel Data Acquisition Systems
For multi-channel data acquisition systems requiring 2 simultaneous 14-bit samples at up to 10 Msps, the LTC2295CUP is an excellent fit. Its dual-channel integration reduces BOM count versus two single-channel ADCs, and the multiplexed or separate data bus option simplifies interface to either FPGAs or microcontrollers. The 110 dB channel-to-channel isolation prevents crosstalk between simultaneously sampled channels - critical for phase-coherent multi-channel measurements in instrumentation. Combine the LTC2295CUP with an analog input MUX and PGA to build expandable channel count DAQs.
Được đề xuất
Communications Test Equipment
Communications test equipment such as signal analyzers, vector signal generators, and protocol testers benefit from the LTC2295CUP's dual-channel 14-bit 10 Msps architecture. The 74.4 dB SNR and 90 dB SFDR deliver measurement-grade fidelity for evaluating Wi-Fi, LTE, and 5G NR signals. The commercial 0C to +70C operating range suits benchtop test equipment environments. The dual-channel architecture enables simultaneous capture of I and Q signals for demodulation analysis, or two independent test points for cross-channel comparison.
Được đề xuất
Industrial Imaging and Spectroscopy
The LTC2295CUP supports industrial imaging applications requiring dual-channel simultaneous sampling, such as dual-line-scan camera digitization or dual-detector spectroscopy systems. The 14-bit resolution captures wide dynamic range imaging data, while the 575 MHz input bandwidth preserves high-frequency harmonics in spectroscopy measurements. The 3V single-supply operation simplifies industrial 5V/3.3V mixed-rail designs, and the exposed-pad QFN package provides robust thermal dissipation in factory-floor environments. Pair the LTC2295CUP with a dual photodiode transimpedance amplifier and timing controller for synchronized image capture.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2295CUP — 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 | LTC2292CUP | LTC2287CUP | LTC2282CUP | LTC2280CUP | LTC2221CUP | LTC2145CUP-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 | 64-QFN (9x9 mm) - same | 64-QFN (9x9 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 14 bits | 12 bits (-2 bits) | 14 bits (same) | 14 bits (same) | 14 bits (same) | 14 bits (same) | 12 bits (-2 bits) |
| Sample Rate | 10 Msps | 10 Msps (same) | 10 Msps (same) | 10 Msps (same) | 10 Msps (same) | 65 Msps (+550%) | 25 Msps (+150%) |
| Number of Channels | 2 (dual) | 2 (same) | 2 (same) | 2 (same) | 2 (same) | 1 (single) | 2 (same) |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
| Supply Voltage | 3V (2.85V to 3.4V) | 3V (same) | 3V (same) | 3V (same) | 3V (same) | 3V (same) | 3V (same) |
| Pin-to-Pin Compatible | Reference | Yes - drop-in | Yes - drop-in | Yes - drop-in | Yes - drop-in | Yes (single channel vs dual) | Yes - drop-in |
Bảo phân biệt quan trọng
- Highest resolution in the LTC22xx family at 10 Msps dual (vsLTC2292CUP)
- True dual-channel simultaneous sampling vs time-interleaved alternatives (vsLTC2221CUP)
- Integrated dual-channel 64-QFN saves PCB area vs two single-channel ADCs (vsDiscrete dual-ADC solution)
Ghi chú thiết kế
The 64-QFN (9x9 mm) package with exposed pad MUST be soldered to a continuous PCB ground plane for both thermal dissipation and electrical performance. Place 0.1uF decoupling capacitors as close as possible to each VDD pin, with bulk 10uF tantalum or ceramic capacitors at the board supply entry. Separate analog (AGND) and digital (OGND) grounds should be joined only at the IC's exposed pad to minimize digital switching noise coupling into sensitive analog inputs. Keep analog input traces as short as possible and surrounded by ground pours.
The CLK input is highly sensitive to jitter for maintaining SNR at high input frequencies - use a low-jitter clock source (typically < 1 ps rms) and route the clock with controlled impedance and short trace length. For full 74.4 dB SNR at the upper input frequency range, the ADC driver op-amp (e.g., AD8138, AD8021) must have sufficient bandwidth and low distortion to not degrade the ADC's own AC performance. A transformer-coupled input network with anti-alias filter is typical for the highest SNR performance.
Do not operate the LTC2295CUP above 3.4V supply voltage - the 3V CMOS process has limited overvoltage tolerance and exceeding the maximum rating will permanently damage the device. When using the multiplexed data bus mode, ensure the FPGA or ASIC receiving the data can capture both channels within one clock cycle. The SHDN pin (active high) must be tied low (ground) for normal operation - leaving it floating may cause unpredictable behavior. Reference pins (REFH, REFL, REFT, REFB) require decoupling capacitors as specified in the datasheet - omitting them will significantly degrade SNR.
Thông tin tuân thủ
RoHS compliant per Analog Devices product page (#PBF suffix indicates lead-free). Not AEC-Q100 qualified - choose AEC-Q100 qualified ADC options for automotive applications. Conflict minerals compliant per ADI supplier disclosure.
