LTC2264IUJ-14 - 14-Bit 40Msps Dual ADC | Analog Devices | Industrial
部品番号: LTC2264IUJ-14 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $47.17 | $47.17 |
| 10 | $44.95 | $449.50 |
| 100 | $43.6 | $4,360.00 |
| 500 | $41.2 | $20,600.00 |
| 1,000 | $38.95 | $38,950.00 |
LTC2264IUJ-14 概要
A pipelined ADC (also called a pipeline converter) is a multi-stage successive-approximation architecture that resolves one or two bits per clock cycle across cascaded gain stages. The pipelined topology achieves high sample rates at moderate-to-high resolution with low latency relative to delta-sigma converters and far better dynamic range than flash ADCs at this resolution. Pipelined ADCs sit in the broader data-converter hierarchy: ADC -> Nyquist-rate ADC -> pipelined ADC -> mixed-signal IC -> semiconductor. Within Analog Devices' portfolio, the LTC226x family occupies the low-power, dual-channel pipelined segment.
Key specifications of the LTC2264IUJ-14 include ±1 LSB INL (typical), ±0.3 LSB DNL (typical), and guaranteed no missing codes over the full industrial temperature range. Transition noise is specified at 1.2 LSB RMS, contributing to a clean spurious-free dynamic range. The digital outputs use a serial LVDS interface, which minimizes the number of board traces required between the ADC and the downstream FPGA or ASIC. Each channel can be configured to output two bits per clock (2-lane mode) for higher throughput or one bit per clock (1-lane mode) for lower pin-count routing.
The part operates from a single 1.8V analog supply and is configured through a serial SPI port. Auxiliary features include shutdown and nap power-down modes, an 800 MHz full-power sample-and-hold bandwidth, and pin compatibility across the 14-bit and 12-bit family members (LTC2264-14/LTC2264-12/LTC2265-14). The pin-compatible 12-bit and 14-bit options allow board-level reuse when the application can trade resolution for SNR.
Typical applications include diversity radio receivers, I/Q baseband digitizers, medical imaging front-ends, multi-channel data acquisition systems, and communications test equipment. The dual-channel matched-pair architecture is well-suited to phased-array antenna systems and any signal chain that requires coherent dual-channel sampling.
When designing with the LTC2264IUJ-14, pay careful attention to the analog input network: the ADC's S/H front-end benefits from a wideband transformer or differential driver, and LVDS traces must be length-matched and routed with controlled 100-ohm differential impedance. Using the SPI port to enable the nap mode between acquisition bursts can reduce power consumption significantly in duty-cycled applications.
This page consolidates distributor pricing, pin-compatible alternatives from the same LTC226x family, and practical design notes that complement (rather than duplicate) the official Analog Devices datasheet.
ドロップイン代替品: LTC2264IUJ-14 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: LTC2264IUJ-14 （同一形状・フットプリント） — 相違点: Package, Operating Temperature Range, Sample Rate, Analog Supply Voltage, Resolution.
クイック比較ツール — 並列比較する代替部品を選択:
LTC2265IUJ-14
✅ ドロップイン✓ 在庫あり
$35.1 / 個
データシートを見る →LTC2263IUJ-14
✅ ドロップイン✓ 在庫あり
$18.25 / 個
データシートを見る →LTC2264IUJ-12
✅ ドロップイン✓ 在庫あり
$20.15 / 個
データシートを見る →LTC2263CUJ-12
✅ ドロップイン✓ 在庫あり
$19.2 / 個
データシートを見る →LTC2262IUJ-12
✅ ドロップイン✓ 在庫あり
$20.55 / 個
データシートを見る →LTC2260IUJ-12
✅ ドロップイン✓ 在庫あり
$11.75 / 個
データシートを見る →LTC2260CUJ-14
✅ ドロップイン✓ 在庫あり
$19.4 / 個
データシートを見る →LTC2264IUJ-14 最大定格＆電気的特性
| 分解能 | 14 bits |
| Number of Channels | 2 |
| Sample Rate | 40 Msps |
| Architecture | Pipelined |
| Input Type | Differential |
| INL (Integral Non-Linearity) | ±1 LSB (typ) |
| DNL (Differential Non-Linearity) | ±0.3 LSB (typ) |
| Missing Codes | None over temperature |
| Transition Noise | 1.2 LSB RMS |
| Full-Power Bandwidth | 800 MHz |
| Digital Output | Serial LVDS (1-lane or 2-lane) |
| Analog Supply Voltage | 1.8 V (typ) |
| Power Modes | Active, Nap, Shutdown |
| Configuration Interface | Serial SPI |
| パッケージ | 40-pin QFN (6 mm x 6 mm) |
| 動作温度範囲 | -40 C to +85 C (Industrial, "I" grade) |
| Pin Family Compatibility | Pin-compatible with 12-bit LTC226x family members |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant (#PBF suffix) |
LTC2264IUJ-14 ピン構成
| ピン 1 | AIN1+ — Channel 1 differential analog input (positive) |
| ピン 2 | AIN1- — Channel 1 differential analog input (negative) |
| ピン 3 | VCM1 — Channel 1 common-mode voltage bypass |
| ピン 4 | GND — Ground |
| ピン 5 | VREF — Voltage reference bypass |
| ピン 6 | REFT — Top reference decoupling |
| ピン 7 | REFB — Bottom reference decoupling |
| ピン 8 | VDD — 1.8V analog supply |
| ピン 9 | GND — Ground |
| ピン 10 | AIN2+ — Channel 2 differential analog input (positive) |
| ピン 11 | AIN2- — Channel 2 differential analog input (negative) |
| ピン 12 | VCM2 — Channel 2 common-mode voltage bypass |
| ピン 13 | ENC+ — Encoder clock input (positive) |
| ピン 14 | ENC- — Encoder clock input (negative) |
| ピン 15 | GND — Ground |
| ピン 16 | OE — Output enable (active high) |
| ピン 17 | MODE — LVDS lane mode select (1-lane/2-lane) |
| ピン 18 | CS — SPI chip select (active low) |
| ピン 19 | SCK — SPI serial clock |
| ピン 20 | SDI — SPI serial data input |
| ピン 21 | SDO — SPI serial data output |
| ピン 22 | OUT1A+ — Channel 1 LVDS data output A (positive) |
| ピン 23 | OUT1A- — Channel 1 LVDS data output A (negative) |
| ピン 24 | OUT1B+ — Channel 1 LVDS data output B (positive) |
| ピン 25 | OUT1B- — Channel 1 LVDS data output B (negative) |
| ピン 26 | FR+ — Frame output LVDS (positive) |
| ピン 27 | FR- — Frame output LVDS (negative) |
| ピン 28 | CLKOUT+ — Clock output LVDS (positive) |
| ピン 29 | CLKOUT- — Clock output LVDS (negative) |
| ピン 30 | NC — Not connected (per datasheet) |
| ピン 31 | OUT2A+ — Channel 2 LVDS data output A (positive) |
| ピン 32 | OUT2A- — Channel 2 LVDS data output A (negative) |
| ピン 33 | OUT2B+ — Channel 2 LVDS data output B (positive) |
| ピン 34 | OUT2B- — Channel 2 LVDS data output B (negative) |
| ピン 35 | GND — Ground |
| ピン 36 | OVDD — LVDS output supply (1.8V) |
| ピン 37 | GND — Ground |
| ピン 38 | VDD — 1.8V analog supply |
| ピン 39 | SENSE — Voltage reference sense pin |
| ピン 40 | GND — Ground (exposed pad - must be soldered) |
主な用途
LTC2264IUJ-14 の用途: 6 件s: Diversity Radio Receiver, I/Q Baseband Digitizer, Medical Imaging Front-End, Multi-Channel Data Acquisition, Communications Test Equipment, Phased-Array Antenna Digitization.
Diversity Radio Receiver
The LTC2264IUJ-14 is well-suited to diversity radio receiver front-ends that require simultaneous dual-channel sampling of two antenna signals. With two matched 14-bit ADC channels operating at 40 Msps in a single 40-pin QFN package, the part eliminates the need for two discrete ADC ICs and removes channel-to-channel gain and offset mismatch concerns that plague discrete designs. Designers typically place the LTC2264IUJ-14 after the IF mixer and SAW filter, with each channel digitizing a phase-shifted antenna path at up to 18 MHz of usable input bandwidth. The 800 MHz full-power bandwidth ensures the S/H front-end does not attenuate high-IF signals. Compared with two single-channel ADCs, the integrated dual channel halves board area, simplifies SPI configuration, and improves SNR by approximately 1-2 dB because both channels share the same voltage reference and clock distribution network.
おすすめ
I/Q Baseband Digitizer
The dual-channel matched architecture of the LTC2264IUJ-14 is purpose-built for I/Q baseband digitization in software-defined radio and direct-conversion receivers, the I and Q baseband signals must be sampled simultaneously with tight gain and phase matching between channels. The LTC2264IUJ-14's two integrated ADC channels share one die and one voltage reference, providing intrinsically matched gain, offset, and timing characteristics critical for high image rejection. At 40 Msps with 1.2 LSB RMS transition noise and ±0.3 LSB DNL, the part delivers the spurious-free dynamic range required for demodulating QPSK, QAM, and OFDM waveforms. Typical placement is after the quadrature demodulator outputs, with the 1-lane or 2-lane serial LVDS interface feeding an FPGA for downstream baseband processing. Power consumption is significantly lower than two single-channel ADCs operating in parallel, enabling portable and battery-powered SDR designs.
おすすめ
Medical Imaging Front-End
The LTC2264IUJ-14 supports ultrasound and other medical imaging front-ends that digitize transducer channels in parallel. Each imaging channel requires an ADC with sufficient dynamic range to capture both strong specular echoes and weak scattered signals; the 14-bit resolution and 1.2 LSB RMS transition noise of the LTC2264IUJ-14 provide approximately 75-78 dB SNR, adequate for diagnostic ultrasound front-ends. The dual-channel integration reduces per-channel cost and PCB area, enabling dense transducer arrays with hundreds of elements. The 1.8V analog supply minimizes heat dissipation in patient-contact probes, and the SPI-configurable nap and shutdown modes support battery-powered portable scanners. Typical placement is between the TGC (time-gain-control) amplifier and the beamforming FPGA/ASIC. The pin-compatible LTC2265IUJ-14 (65 Msps) is available for higher-frequency probes.
おすすめ
Multi-Channel Data Acquisition
The LTC2264IUJ-14 is a strong fit for multi-channel industrial data-acquisition systems where multiple analog signals must be digitized simultaneously at high sample rates. Each LTC2264IUJ-14 provides two synchronized channels at 40 Msps, so four parts in a synchronized array capture eight channels with deterministic timing - useful for vibration monitoring, sonar arrays, and multi-axis test stands. The ±1 LSB INL (typical) and guaranteed no-missing-codes-over-temperature performance ensures measurement accuracy across the industrial -40C to +85C range. The serial LVDS output minimizes trace count between the ADC bank and the FPGA, which simplifies PCB routing in dense channel-count systems. Industrial designers should leverage the SPI port to switch unused channels to nap mode for further power reduction.
おすすめ
Communications Test Equipment
Communications test equipment such as signal analyzers, vector signal generators, and protocol testers benefit from the LTC2264IUJ-14's matched dual-channel performance. Test equipment demands low distortion and accurate SFDR/NF measurements; the 14-bit, 40 Msps architecture provides the dynamic range required for analyzing modulated carriers up to 18 MHz of instantaneous bandwidth. The dual channels enable phase-coherent measurements, such as IQ imbalance calibration or two-tone IMD tests, in a single IC. The SPI configuration port allows automated test pathing or per-test-bandwidth optimization (1-lane vs 2-lane LVDS). Designers typically pair the LTC2264IUJ-14 with a low-noise clock distribution network and an FPGA that handles digital signal processing. The pin-compatible LTC2265IUJ-14 (65 Msps) is available for higher-bandwidth vector signal analyzer options.
おすすめ
Phased-Array Antenna Digitization
The dual matched channels of the LTC2264IUJ-14 simplify phased-array antenna designs, in which dozens to hundreds of antenna elements must be digitized coherently. The matched gain and timing between the two on-die ADC channels minimize beam-pointing errors that would otherwise arise from channel mismatch. At 14-bit / 40 Msps with serial LVDS outputs, the part captures baseband or IF signals from two antenna elements per IC, keeping PCB area and power consumption manageable in dense arrays. The serial LVDS interface reduces the number of FPGA pins required per ADC, a significant concern when scaling to large arrays. Industrial and defense phased-array applications benefit from the -40C to +85C operating range and the SPI-configurable power-down modes for fault-tolerant operation. For wider instantaneous bandwidth, designers can drop in the LTC2265IUJ-14 in the same footprint.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: LTC2264IUJ-14 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | LTC2265IUJ-14 | LTC2263IUJ-14 | LTC2264IUJ-12 | LTC2263CUJ-12 | LTC2262IUJ-12 |
|---|---|---|---|---|---|---|
| Package | 40-QFN (6x6 mm) | 40-QFN (6x6 mm) - same | 40-QFN (6x6 mm) - same | 40-QFN (6x6 mm) - same | 40-QFN (6x6 mm) - same | 40-QFN (6x6 mm) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 14 bits | 14 bits | 14 bits | 12 bits | 12 bits | 12 bits |
| Sample Rate | 40 Msps | 65 Msps | 25 Msps | 40 Msps | 25 Msps | 25 Msps |
| Channels | 2 | 2 | 2 | 2 | 2 | 2 |
| Output Interface | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS | Serial LVDS |
| Temperature Grade | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Commercial (0C to +70C) | Industrial (-40C to +85C) |
| RoHS Compliance | Yes (#PBF) | Yes (#PBF) | Yes (#PBF) | Yes (#PBF) | Yes (#PBF) | Yes (#PBF) |
主な差別化要因
- Highest sample rate in pin-compatible family （vs LTC2263IUJ-14)
- Matched dual-channel on a single die （vs LTC2206IUK (single-channel legacy))
- Serial LVDS output reduces FPGA pin count （vs Parallel-output CMOS ADCs)
設計ノート
The LTC2264IUJ-14 analog input traces must be routed as length-matched 100-ohm differential pairs from the input transformer or driver amplifier to the AIN1+/AIN1- and AIN2+/AIN2- pins. Keep the analog input traces short and far from the LVDS digital outputs to minimize digital crosstalk into the analog front-end. Place the VCM1 and VCM2 common-mode bypass capacitors as close to those pins as possible.
The LTC2264IUJ-14 requires clean 1.8V supplies on both VDD and OVDD. Use ferrite beads or pi-filter networks to isolate the analog VDD from the digital OVDD, with bulk ceramic capacitors (10 uF) on each supply pin and small 0.1 uF/0.01 uF decoupling capacitors placed as close to each pin as possible. The exposed thermal pad (GND) must be soldered to a large ground plane for heat dissipation and electrical performance.
Avoid driving the analog inputs with single-ended signals - the LTC2264IUJ-14 is designed for differential input drive to achieve the specified INL, DNL, and transition noise. Use a center-tapped transformer (e.g., Mini-Circuits ADT1-1WT) or a fully differential driver (e.g., LTC6406, ADA4940) to convert single-ended IF signals to the required differential drive. Do not exceed the absolute maximum differential input voltage or apply signals before power-up.
Route the LVDS output pairs (OUT1A+/-, OUT1B+/-, OUT2A+/-, OUT2B+/-, FR+/-, CLKOUT+/-) as length-matched 100-ohm differential pairs with controlled impedance. The LVDS signals are high-speed (>400 Mbps in 2-lane mode) and are sensitive to impedance discontinuities. Keep ground reference continuous under LVDS traces and minimize the use of vias in the LVDS output paths.
Estimated: At full 40 Msps dual-channel operation, the LTC2264IUJ-14 consumes approximately 150 mW from the 1.8V supply, dissipating ~135 mW internally. The 40-QFN package with a properly soldered exposed pad achieves a theta_JA of approximately 30 C/W in still air, so junction-to-ambient rise is about 4-5 C above ambient - no external heatsink is required. For designs without a continuous ground plane under the exposed pad, derate to 50 C/W or higher.
コンプライアンス情報
RoHS compliant when ordered with #PBF suffix. Lead-free (Pb-free) and halogen-free per Analog Devices product page. AEC-Q100 not applicable - this is a data converter, not an automotive-qualified IC. Industrial temperature grade only (no automotive or military grade variants).
