LTC2151IUJ-12 - 12-Bit 210Msps ADC, 40-QFN | Analog Devices
MPN: LTC2151IUJ-12 ✓ Hoạt độngLTC2151IUJ-12 Tóm tắt
A pipelined ADC is a high-speed converter architecture that processes the analog input through multiple low-resolution stages in parallel, each stage producing a sub-ADC residue that is digitized by the next stage. This approach enables sample rates well above what successive-approximation architectures can achieve, while maintaining low latency and good spurious-free dynamic range (SFDR). The LTC2151-12 sits at the top of the signal-chain hierarchy: analog sensor -> anti-alias filter -> pipelined ADC -> FPGA/ASIC digital processing.
Key features include 1.25 GHz full-power bandwidth sample-and-hold, an optional clock duty-cycle stabilizer for jitter-insensitive operation, and low-power Sleep and Nap modes that reduce dissipation when the converter is idle. The serial SPI port allows in-system configuration of output format, gain, offset, and channel modes. Pin-compatible 14-bit versions (LTC2251-14 family) allow system scalability by swapping the ADC without PCB rework.
The device accepts differential or single-ended analog inputs and produces LVDS, parallel CMOS, or serialized LVDS outputs selectable via SPI, simplifying interface to FPGAs. Excellent AC performance with high SFDR makes the LTC2151-12 suitable for directly digitizing IF signals in software-defined radio and radar receivers where spurious content can mask weak targets.
Typical applications include cellular base-station receivers, radar and electronic-warfare signal processing, medical imaging front-ends, and high-speed data acquisition cards. The wide input bandwidth permits undersampling of IF carriers, reducing system cost by eliminating a downconversion stage.
When designing with this ADC, ensure the analog input network presents 50 ohm (or 200 ohm differential) termination and that the encode clock source has low jitter (<200 fs RMS) to preserve SNR at high input frequencies. The exposed pad must be soldered to a continuous ground plane for thermal and electrical performance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, including parametric cross-reference guidance for engineers migrating between the 12-bit and 14-bit LTC215x family members.
Bộ thay thế dễ dàng lắp đặt cho LTC2151IUJ-12 — 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 LTC2151IUJ-12 (cùng hình factor và footprint) — khác nhau ở Package, RoHS Status.
LTC2150IUJ-12
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2152IUJ-12
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →LTC2151IUJ-12#PBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2151CUJ-12
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2251IUJ-14
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
LTC2151IUJ-12#TRPBF
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
LTC2151IUJ-12 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bits |
| Number of Channels | 1 |
| Architecture | Pipelined |
| Sample Rate | 210 Msps |
| Input Bandwidth (Full Power) | 1.25 GHz |
| Data Interface | LVDS / Parallel CMOS / Serial SPI |
| Input Type | Differential / Single-Ended |
| Hộp | 40-QFN (6 mm x 6 mm) exposed pad |
| Khoảng nhiệt độ hoạt động | -40C to +85C (I grade) |
| Kiểu lắp đặt | Surface Mount |
| Clock Duty Cycle Stabilizer | Optional (SPI configurable) |
| Sleep / Nap Modes | Yes |
| Trạng thái RoHS | Compliant |
Cấu hình chân LTC2151IUJ-12
| Chân 1 | AVDD — Analog supply voltage |
| Chân 2 | AVDD — Analog supply voltage |
| Chân 3 | VCM — Common-mode voltage output |
| Chân 4 | AINP — Analog positive input |
| Chân 5 | AINN — Analog negative input |
| Chân 6 | GND — Analog ground |
| Chân 7 | REF — Reference voltage bypass |
| Chân 8 | SENSE — Reference mode select |
| Chân 9 | GND — Ground |
| Chân 10 | OGND — Output ground |
| Chân 11 | OVDD — Output driver supply |
| Chân 12 | CLK — Encode clock input |
| Chân 13 | CLKOUT — Clock output for synchronization |
| Chân 14 | CS — SPI chip select |
| Chân 15 | SCK — SPI serial clock |
| Chân 16 | SDI — SPI serial data input |
| Chân 17 | SDO — SPI serial data output |
| Chân 18 | DNC — Do not connect |
| Chân 19 | D0 — Data output bit 0 (LSB) |
| Chân 20 | D1 — Data output bit 1 |
| Chân 21 | D2 — Data output bit 2 |
| Chân 22 | D3 — Data output bit 3 |
| Chân 23 | D4 — Data output bit 4 |
| Chân 24 | D5 — Data output bit 5 |
| Chân 25 | D6 — Data output bit 6 |
| Chân 26 | D7 — Data output bit 7 |
| Chân 27 | D8 — Data output bit 8 |
| Chân 28 | D9 — Data output bit 9 |
| Chân 29 | D10 — Data output bit 10 |
| Chân 30 | D11 — Data output bit 11 (MSB) |
| Chân 31 | OF — Overflow indicator |
| Chân 32 | OVDD — Output driver supply |
| Chân 33 | OGND — Output ground |
| Chân 34 | DNC — Do not connect |
| Chân 35 | DNC — Do not connect |
| Chân 36 | DNC — Do not connect |
| Chân 37 | DVDD — Digital supply |
| Chân 38 | DGND — Digital ground |
| Chân 39 | AVDD — Analog supply voltage |
| Chân 40 | AVDD — Analog supply voltage |
Ứng dụng tiêu biểu
LTC2151IUJ-12 phù hợp cho 6 Áp dụngs: Cellular Base Station Receivers, Radar and Electronic Warfare Signal Processing, Medical Imaging Front-Ends (Ultrasound / MRI), High-Speed Data Acquisition Cards, Software Defined Radio (SDR) Receivers, Communications Test Equipment.
Cellular Base Station Receivers
The LTC2151IUJ-12's 210 Msps sample rate and 1.25 GHz full-power input bandwidth enable direct digitization of IF signals in LTE and 5G NR base-station receivers, eliminating a downconversion stage and reducing BOM cost. The LVDS output interface connects directly to FPGA digital downconverters (DDCs) with minimal glue logic. The 12-bit resolution preserves ENOB for demodulating 64-QAM and 256-QAM constellations with low EVM. Sleep and Nap modes reduce power dissipation during idle frames, important for energy-efficient radio units. According to Analog Devices, the optional clock duty cycle stabilizer maintains SNR across varying clock source characteristics common in multi-card basestation chassis.
Được đề xuất
Radar and Electronic Warfare Signal Processing
The LTC2151IUJ-12 is well-suited for radar and EW receiver front-ends that demand high SFDR to detect weak targets in the presence of strong jammers. The 1.25 GHz bandwidth permits direct undersampling of L-band and S-band IF frequencies, simplifying receiver architecture and reducing analog component count. The wide industrial temperature range (-40C to +85C) supports outdoor military and aerospace installations. According to Analog Devices, the high SFDR preserves dynamic range when digitizing pulsed-Doppler radar returns. The pin-compatible 14-bit LTC2251IUJ-14 family allows a direct upgrade path when higher resolution is needed for synthetic aperture radar (SAR) processing.
Được đề xuất
Medical Imaging Front-Ends (Ultrasound / MRI)
The LTC2151IUJ-12's combination of 210 Msps sample rate and 12-bit resolution suits ultrasound and MRI receive-channel digitization, where multiple channels must sample simultaneously with good SNR. The LVDS output mode minimizes digital emissions that could couple into sensitive analog receive paths in MRI systems. The low-power Sleep/Nap modes extend battery life in portable ultrasound scanners. According to Analog Devices, the SPI-programmable gain and offset allow per-channel calibration to compensate for transducer variations. The pin-compatible family footprint enables a unified PCB design that supports multiple resolution tiers across product lines.
Được đề xuất
High-Speed Data Acquisition Cards
The LTC2151IUJ-12 fits PCI Express and PXIe data acquisition cards used in laboratory instrumentation, where 210 Msps capture of transient signals with 12-bit resolution is sufficient for many test applications. The parallel CMOS output mode simplifies interface to FPGA pre-processing without requiring LVDS deserialization. The exposed-pad QFN package provides good thermal dissipation for sustained high-rate acquisition. The 1.25 GHz bandwidth supports oversampling techniques that improve effective resolution through DSP averaging. According to Analog Devices, the clock duty cycle stabilizer helps maintain performance with non-50%-duty clocks from external PLL sources.
Được đề xuất
Software Defined Radio (SDR) Receivers
The LTC2151IUJ-12 enables direct sampling SDR receivers that digitize RF signals at IF, eliminating analog mixers and filters in the signal path. The 1.25 GHz full-power bandwidth supports undersampling of HF, VHF, and low-UHF bands with a single ADC, while 12-bit resolution captures enough dynamic range for weak-signal modes like CW and FT8. The LVDS output streams directly into FPGA FFT pipelines for real-time spectrum display. According to Analog Devices, the family pinout allows SDR designers to scale between 170/210/250 Msps tiers without PCB changes for different deployment scenarios.
Được đề xuất
Communications Test Equipment
The LTC2151IUJ-12 powers signal analyzers and protocol testers that must capture wide-bandwidth modulated carriers with high fidelity for compliance verification. The 12-bit resolution at 210 Msps provides sufficient ENOB to measure EVM on LTE, 5G NR, and Wi-Fi 6 signals with margin. The SPI port allows automated gain and offset calibration during production test, reducing manufacturing cost. According to Analog Devices, the pin-compatible family allows test-equipment vendors to ship multiple model tiers (170/210/250 Msps) from a single PCB design. The LVDS output mode reduces EMI inside dense tester chassis.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho LTC2151IUJ-12 — 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 | LTC2150IUJ-12 | LTC2152IUJ-12 | LTC2251IUJ-14 | LTC2151CUJ-12 |
|---|---|---|---|---|---|
| Package | 40-QFN (UJ) 6x6 mm | 40-QFN (UJ) 6x6 mm - same | 40-QFN (UJ) 6x6 mm - same | 40-QFN (UJ) 6x6 mm - same | 40-QFN (UJ) 6x6 mm - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bits | 12 bits | 12 bits | 14 bits | 12 bits |
| Sample Rate | 210 Msps | 170 Msps | 250 Msps | 190 Msps | 210 Msps |
| Number of Channels | 1 | 1 | 1 | 1 | 1 |
| Temperature Grade | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | -40C to +85C (I) | 0C to +70C (C) |
| Data Interface | LVDS / Parallel CMOS | LVDS / Parallel CMOS | LVDS / Parallel CMOS | LVDS / Parallel CMOS | LVDS / Parallel CMOS |
| RoHS / Lead-Free | Compliant (PBF suffix) | Compliant | Compliant | Compliant | Compliant |
Bảo phân biệt quan trọng
- Pin-compatible family across three sample rates (vsLTC2150IUJ-12 (170 Msps) and LTC2152IUJ-12 (250 Msps))
- 1.25 GHz full-power input bandwidth supports IF undersampling (vsLower-bandwidth ADCs in same speed class)
- Industrial temperature grade available (vsCommercial-only ADC alternatives)
- Multiple output formats via SPI configuration (vsFixed-format ADCs)
Ghi chú thiết kế
The 40-QFN exposed pad must be soldered directly to a continuous ground plane on the top layer with multiple thermal vias to the inner ground planes. Missing or insufficient via stitching degrades thermal performance and can introduce ground bounce that couples into the analog inputs. Place input coupling capacitors within 2 mm of the AINP/AINN pins and use matched-length differential routing to preserve SFDR at high input frequencies.
The encode clock source must have RMS jitter below 200 fs to preserve SNR at high analog input frequencies. Use a dedicated clock generator (e.g. AD9516) rather than distributing a system clock through long PCB traces. The optional clock duty-cycle stabilizer helps maintain performance when the clock source is non-50%-duty, common with cascaded PLL outputs. Route CLK and CLKOUT as 50-ohm controlled-impedance traces with proper termination at the ADC pin.
Decouple each AVDD/DVDD/OVDD pin with a 0.1 uF ceramic capacitor placed within 1 mm of the pin, plus a bulk 10 uF tantalum or ceramic capacitor per supply rail. Use separate analog and digital ground regions connected only at the exposed pad to avoid digital return currents corrupting the analog ground reference. The Sleep and Nap modes reduce quiescent current substantially when the ADC is idle; toggle through SPI to wake.
Do not route digital output bus traces (D0-D11) parallel to analog input traces; keep at least 3 mm separation or use a ground strip to prevent digital coupling into the analog front-end. Verify the SPI mode bits for output format (LVDS vs parallel CMOS) before locking PCB layout - changing output mode requires only SPI reconfiguration, but PCB routing differs. Avoid undersampling IF signals that fall in the ADC's harmonic response nulls to prevent alias spurs.
Thông tin tuân thủ
RoHS compliant per Analog Devices product page (#PBF suffix denotes lead-free). Not AEC-Q100 qualified - this is an industrial/commercial ADC. REACH status compliant per manufacturer declaration.
