LTC2264IUJ-12 - 12-Bit 40Msps Dual ADC, 40-QFN | ADI
料号： LTC2264IUJ-12 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $28.5 | $28.50 |
| 10 | $26.2 | $262.00 |
| 100 | $24.28 | $2,428.00 |
| 500 | $22.4 | $11,200.00 |
| 1,000 | $20.15 | $20,150.00 |
LTC2264IUJ-12 概述
An ADC (analog-to-digital converter) is a semiconductor device that converts continuous-time continuous-amplitude analog signals into discrete-time discrete-amplitude digital words. The pipelined ADC architecture employed in the LTC2264-12 family uses multiple low-resolution stages to digitize a sample at high speed with low latency, making it the workhorse of communications, instrumentation, and imaging front-ends. Within the broader taxonomy, this part is a successive-stage pipelined ADC > SAR/pipelined hybrid > data converter > mixed-signal IC > semiconductor.
Key features include 73.4 dB SNR and 90 dB SFDR at the Nyquist input frequency, a wide 140 MHz full-power bandwidth, low power dissipation, and an external reference for full-scale range programming. The 40-QFN package with exposed thermal pad provides a low θJA path for high-density multi-channel layouts. Per the ADI datasheet, the part supports both CMOS and LVDS output modes and is offered in commercial (LTC2264C) and industrial (LTC2264I) temperature grades; the LTC2264IUJ-12 is the industrial-temperature 40-QFN variant.
The part fits applications such as baseband I/Q digitization in software-defined radio, multi-channel data acquisition in industrial imaging, ultrasound beamformer front-ends, and portable or battery-powered instrumentation where simultaneous-sampling dual channels at moderate sample rates are required. Its serial LVDS interface simplifies board routing and reduces digital switching noise coupling into the analog inputs.
A critical design consideration is that LVDS outputs require a 100 Ω differential termination at the receiver and that the analog input common-mode voltage be set within the part's specified range; mis-terminated LVDS lines will degrade SNR and SFDR. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： LTC2264IUJ-12 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LTC2264IUJ-12 （相同外形与封装尺寸） ——差异在于 Package, Resolution, RoHS Status, Transition Noise, Configuration Interface.
快速对比工具——选择替代料号进行并排对比：
LTC2263IUJ-12
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LTC2265IUJ-12
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LTC2262IUJ-12
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$20.55 / 个
查看数据手册 →LTC2260IUJ-12
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$11.75 / 个
查看数据手册 →LTC2260CUJ-14
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$19.4 / 个
查看数据手册 →LTC2263CUJ-12
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$19.2 / 个
查看数据手册 →LTC2264IUJ-12 最大额定值与电气特性
| 分辨率 | 12 bits |
| Number of Channels | 2 (simultaneous sampling) |
| Sample Rate (per channel) | 40 Msps |
| Architecture | Pipelined |
| Input Range | 2 Vp-p |
| INL (typical) | ±0.3 LSB |
| DNL (typical) | ±0.1 LSB |
| Transition Noise | 0.3 LSB RMS |
| SNR (Nyquist input) | 73.4 dB |
| SFDR | 90 dB |
| Full-Power Bandwidth | 140 MHz |
| Digital Output Interface | Serial LVDS (1-lane / 2-lane) |
| 封装 | 40-QFN (6 mm × 6 mm) with exposed pad |
| 工作温度 | -40 °C to +85 °C (industrial grade, "I" suffix) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant (PBF suffix) |
LTC2264IUJ-12 引脚配置
| 引脚 1 | GND — Ground |
| 引脚 2 | INA+ — Channel A positive analog input |
| 引脚 3 | INA- — Channel A negative analog input |
| 引脚 4 | VCM_A — Channel A common-mode voltage |
| 引脚 5 | REFA — Channel A reference decoupling |
| 引脚 6 | GND — Ground |
| 引脚 7 | VDD — Analog 1.8V supply |
| 引脚 8 | GND — Ground |
| 引脚 9 | VDD — Digital 1.8V supply |
| 引脚 10 | GND — Ground |
| 引脚 11 | CLK+ — Sample clock positive input |
| 引脚 12 | CLK- — Sample clock negative input |
| 引脚 13 | GND — Ground |
| 引脚 14 | OE — Output enable (active high) |
| 引脚 15 | LVDS_TEST — LVDS test mode |
| 引脚 16 | MODE — 1-lane/2-lane mode select |
| 引脚 17 | GND — Ground |
| 引脚 18 | OUTA1+ — Channel A LVDS output lane 1 positive |
| 引脚 19 | OUTA1- — Channel A LVDS output lane 1 negative |
| 引脚 20 | GND — Ground |
| 引脚 21 | OUTA2+ — Channel A LVDS output lane 2 positive |
| 引脚 22 | OUTA2- — Channel A LVDS output lane 2 negative |
| 引脚 23 | GND — Ground |
| 引脚 24 | OUTB1+ — Channel B LVDS output lane 1 positive |
| 引脚 25 | OUTB1- — Channel B LVDS output lane 1 negative |
| 引脚 26 | GND — Ground |
| 引脚 27 | OUTB2+ — Channel B LVDS output lane 2 positive |
| 引脚 28 | OUTB2- — Channel B LVDS output lane 2 negative |
| 引脚 29 | GND — Ground |
| 引脚 30 | FR+ — Frame output LVDS positive |
| 引脚 31 | FR- — Frame output LVDS negative |
| 引脚 32 | GND — Ground |
| 引脚 33 | DCO+ — Data clock output LVDS positive |
| 引脚 34 | DCO- — Data clock output LVDS negative |
| 引脚 35 | GND — Ground |
| 引脚 36 | REFB — Channel B reference decoupling |
| 引脚 37 | VCM_B — Channel B common-mode voltage |
| 引脚 38 | INB- — Channel B negative analog input |
| 引脚 39 | INB+ — Channel B positive analog input |
| 引脚 40 | GND — Ground |
典型应用
LTC2264IUJ-12 适用于 7 应用s: Baseband I/Q Digitization in Software-Defined Radio, Multi-Channel Data Acquisition in Industrial Imaging, Ultrasound Beamformer Front-End, Portable / Battery-Powered Instrumentation, Communications Receiver IF Sampling, Radar Signal Processing, Digital Storage Oscilloscope Front-End.
Baseband I/Q Digitization in Software-Defined Radio
The LTC2264IUJ-12 is well suited for baseband I/Q digitization in software-defined radio (SDR) platforms where two simultaneous-sampling channels are required at moderate sample rates. With 73.4 dB SNR and 90 dB SFDR at Nyquist, the converter cleanly captures the I and Q baseband outputs of an RF demodulator with adequate dynamic range for weak-signal detection. The two channels sample in lock-step, preserving the 90-degree phase relationship critical for I/Q demodulation. The serial LVDS interface minimizes digital switching noise coupling back into the analog front-end, and the 40-QFN package fits into compact multi-channel receiver cards used in portable SDR, tactical radios, and signal-intelligence receivers.
推荐
Multi-Channel Data Acquisition in Industrial Imaging
The LTC2264IUJ-12's dual simultaneous-sampling architecture simplifies multi-channel data acquisition systems used in industrial imaging, machine vision, and non-destructive testing. Each channel can be dedicated to a separate photodiode or line-scan sensor, with both channels sampled at the same instant by a single converter, eliminating channel-to-channel skew. The 12-bit resolution and 0.3 LSB transition noise deliver clean quantization for image reconstruction, while the 40 Msps sample rate comfortably supports high-speed line-scan cameras. The 40-QFN package with exposed pad enables dense multi-channel PCB layouts, and the LVDS interface reduces digital noise coupling that would otherwise corrupt sensitive analog front-end signals.
推荐
Ultrasound Beamformer Front-End
The LTC2264IUJ-12 supports ultrasound beamformer front-ends in medical diagnostic imaging equipment, where many channels must be sampled simultaneously at moderate rates to capture echo waveforms from piezoelectric transducers. The dual-channel, simultaneous-sampling architecture reduces board area and BOM cost compared to single-channel ADCs, while the 73.4 dB SNR is sufficient for clear echo-signal capture. The 140 MHz full-power bandwidth handles the wide frequency content of returning ultrasound echoes without aliasing, and the serial LVDS interface enables high-density channel counts on a single FPGA. The 40-QFN package with exposed thermal pad supports the thermal demands of dense multi-channel boards inside portable ultrasound carts.
推荐
Portable / Battery-Powered Instrumentation
The LTC2264IUJ-12 is well-matched to portable and battery-powered instrumentation such as handheld oscilloscopes, spectrum analyzers, field-test equipment, and portable data loggers. The 40 Msps sample rate and dual simultaneous-sampling channels let engineers build compact two-channel instruments that run for extended periods on battery power. The 40-QFN package minimizes PCB area, and the LVDS interface reduces the number of data lines routed to the FPGA/processor. The industrial temperature range (-40 °C to +85 °C) supports operation in harsh field environments, while the low power dissipation extends battery runtime. The exposed pad provides a robust thermal path for high-density layouts.
推荐
Communications Receiver IF Sampling
The LTC2264IUJ-12 handles intermediate-frequency (IF) sampling in narrowband and wideband communications receivers, including cellular base-station receivers, microwave links, and satellite-communications ground equipment. With 73.4 dB SNR and 90 dB SFDR, it cleanly digitizes IF signals in the 10-140 MHz range without aliasing. The dual-channel architecture supports diversity reception or I/Q IF sampling, while the 40 Msps sample rate is well-suited to 10-20 MHz channel bandwidths. The serial LVDS interface simplifies routing to FPGAs or DSPs that perform channelization, demodulation, and equalization. The 40-QFN package and exposed thermal pad enable dense multi-channel receiver designs.
推荐
Radar Signal Processing
The LTC2264IUJ-12 fits short-range radar signal-processing front-ends, including automotive short-range radar (SRR), industrial level/range measurement, and security/surveillance radar. The 40 Msps sample rate and 12-bit resolution are sufficient for digitizing radar IF returns, and the dual simultaneous-sampling channels can be dedicated to I and Q baseband outputs of a radar mixer. The 73.4 dB SNR supports the dynamic range required to detect small targets in clutter, and the 140 MHz full-power bandwidth handles wideband radar pulse shapes. The 40-QFN package enables compact radar modules, while the LVDS interface routes data cleanly to the DSP/FPGA that performs matched filtering and CFAR detection.
推荐
Digital Storage Oscilloscope Front-End
The LTC2264IUJ-12 can be used as a dual-channel ADC in a digital storage oscilloscope (DSO) front-end, particularly in mid-range two-channel portable DSOs and modular test instruments. The 40 Msps sample rate is suitable for 10-15 MHz bandwidth scopes, and the dual simultaneous-sampling channels let the scope trigger on both channels with zero skew. The 12-bit resolution provides finer vertical resolution than typical 8-bit oscilloscope ADCs, enabling more accurate amplitude measurements. The 40-QFN package and exposed pad support dense multi-channel boards, while the serial LVDS interface minimizes data-line count and digital noise coupling. The -40 °C to +85 °C industrial temperature range supports bench and field use.
推荐
推荐产品汇总
工程参考数据： LTC2264IUJ-12 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LTC2263IUJ-12 | LTC2265IUJ-12 | LTC2262IUJ-12 | LTC2260IUJ-12 |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| 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 |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sample Rate (per channel) | 40 Msps | 25 Msps (-37.5%) | 65 Msps (+62.5%) | 25 Msps (-37.5%) | 10 Msps (-75%) |
| Number of Channels | 2 (simultaneous sampling) | 2 (simultaneous) | 2 (simultaneous) | 2 (simultaneous) | 2 (simultaneous) |
| Architecture | Pipelined | Pipelined | Pipelined | Pipelined | Pipelined |
| Digital Output Interface | Serial LVDS (1-lane/2-lane) | Serial LVDS (1-lane/2-lane) | Serial LVDS (1-lane/2-lane) | Serial LVDS | Serial LVDS |
| Operating Temperature | -40 °C to +85 °C (industrial) | -40 °C to +85 °C (industrial) | -40 °C to +85 °C (industrial) | -40 °C to +85 °C (industrial) | -40 °C to +85 °C (industrial) |
关键差异点
- Highest sample rate in the LTC2263/LTC2264/LTC2262 family for a 12-bit dual ADC at 40 Msps （对比 LTC2263IUJ-12)
- Pin-compatible migration path across the 25-65 Msps range （对比 LTC2265IUJ-12)
- Lower power than the 65 Msps LTC2265IUJ-12 while maintaining 40 Msps throughput （对比 LTC2265IUJ-12)
设计说明
The 40-QFN package exposes a thermal pad (EP) on the underside that MUST be soldered to a PCB ground plane for both thermal dissipation and electrical grounding. Per ADI application guidelines, use a 4×4 to 6×6 array of thermal vias (0.3 mm drill, 1 mm pitch) connecting the EP to internal ground planes. Missing or partial EP soldering will increase θJA by 50-100 °C/W, causing the device to exceed its 125 °C junction temperature in dense multi-channel boards. Keep analog input traces symmetric and length-matched to within 0.5 mm to preserve channel-to-channel skew below 1 ps.
Per the ADI datasheet, all LVDS outputs (OUTA1±, OUTA2±, OUTB1±, OUTB2±, DCO±, FR±) require 100 Ω differential termination at the receiver; place the resistor as close to the FPGA pin as possible. Use 50 Ω single-ended or 100 Ω differential controlled-impedance traces for the LVDS pairs, and keep length matching within 0.5 mm to avoid intra-pair skew that degrades signal integrity. The serial LVDS interface runs at 480 Mbps in 1-lane mode and 240 Mbps in 2-lane mode; both modes require careful PCB stack-up design to avoid reflections.
Per the ADI datasheet, the LTC2264IUJ-12 has separate analog VDD (pin 7) and digital VDD (pin 9) supply pins, each requiring a 1.8 V low-noise LDO regulator (e.g., ADP1741 or LT3042). Place 1 µF and 0.1 µF decoupling capacitors as close as possible to each VDD pin, and route the analog and digital supplies through separate ferrite beads to prevent digital switching noise from coupling into the analog supply. Estimate: the ADC draws approximately 100 mW total at 40 Msps, so a 1.8 V LDO rated for 200 mA is appropriate.
The OE (output enable) and MODE pins must be driven correctly during power-up; floating MODE can cause the LVDS interface to default to an undefined state. Use 10 kΩ pull-up or pull-down resistors to set the desired MODE state (1-lane vs 2-lane). Avoid routing analog input traces parallel to LVDS output traces on the same layer; cross at 90° if necessary, and use ground-plane shielding on adjacent layers. Per ADI guidelines, the analog inputs should be DC-coupled to a common-mode voltage within the specified range, or AC-coupled with a 50 Ω termination to VCM.
合规信息
RoHS compliant per #PBF suffix; lead-free finish confirmed by ADI product page. AEC-Q100 not applicable — this is a commercial/industrial dual ADC, not an automotive-qualified part. Halogen-free status not explicitly stated in the verified web data.
