MAX1218ECQ+D - Dual 12-Bit 170Msps ADC | Maxim Integrated
MPN： MAX1218ECQ+D ✓ 啟用中MAX1218ECQ+D 概覽
An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts continuously variable analog voltages into discrete digital codes for processing by DSPs, FPGAs, or microcontrollers. The MAX1218ECQ+D belongs to the high-speed pipelined ADC category, which sits hierarchically under data converters, mixed-signal ICs, and integrated circuits (ICs). Pipelined ADCs use a switched-capacitor multi-stage architecture to achieve sample rates well beyond what successive-approximation (SAR) ADCs can deliver, while maintaining 10-14 bit resolution typical of communications, instrumentation, and defense systems.
The device integrates two matched 12-bit ADC cores that share a common input clock and reference, supporting simultaneous sampling of in-phase (I) and quadrature (Q) baseband or intermediate-frequency (IF) signals. It features excellent dynamic performance, including high signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) suitable for multicarrier communication receivers. The MAX1218ECQ+D operates from a single 1.8 V supply and is specified over the extended industrial -40°C to +85°C temperature range.
Typical applications include broadband cable CMTS downstream receivers, cellular base-station digitizing IF stages, medical imaging front ends (ultrasound beamformers), radar/electronic-warfare IF sampling, and instrumentation digitizers. When paired with a low-jitter clock source and a high-bandwidth differential front-end driver, the MAX1218ECQ+D delivers the dynamic range needed for multi-carrier QAM and OFDM signal chains.
When designing with this ADC, prioritize clock-jitter minimization because the SNR ceiling scales inversely with aperture jitter; the datasheet specifies an aperture jitter requirement of sub-picosecond rms. Use a fully differential input topology with a dedicated ADC driver such as the MAX2055 or a comparable low-noise op-amp, and decouple the analog and digital 1.8 V rails with ferrite beads to prevent digital switching noise from coupling back into the analog front end.
This page synthesizes distributor pricing, drop-in pin-compatible variants (MAX1217 at 125 Msps and MAX1219 at 210 Msps), and practical PCB-layout and clock-design notes that go beyond the manufacturer datasheet alone.
直接替換替代品，適用於 MAX1218ECQ+D — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MAX1218ECQ+D （相同外形與佔位） — 差異在於 Architecture, Number of Channels, Operating Temperature Range, Package, Sample Rate.
MAX1217ECQ+TD
✅ 直接替換聯絡詢價
查看資料表 →MAX1219
✅ 直接替換📋 參考替代品（不在目錄中）
MAX1218ECQ+D 最大額定值與電氣特性
| 解析度 | 12 bits |
| Number of Channels | 2 (dual, simultaneous sampling) |
| Sample Rate | 170 Msps per channel |
| Architecture | Pipelined (multi-stage switched-capacitor) |
| Analog Supply Voltage | 1.8 V (single supply) |
| Input Type | Differential |
| 封裝 | 100-pin HTFQFP (TQFP with exposed paddle) |
| Package Code | HTFQFP |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.5 mm |
| 工作溫度範圍 | -40°C to +85°C (extended industrial) |
| Temperature Grade | INDUSTRIAL |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
MAX1218ECQ+D htfqfp 腳位配置指南
MAX1218ECQ+D（htfqfp 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： MAX1218ECQ+D.
請參閱 資料表 以查看完整腳位配置。
典型應用
MAX1218ECQ+D 適用於 6 應用s: Broadband Cable CMTS Downstream Receiver, Cellular Base Station IF Sampling, Medical Ultrasound Beamforming, Radar and Electronic Warfare IF Sampling, Test and Measurement Instrumentation, Software Defined Radio (SDR) Baseband Digitization.
Broadband Cable CMTS Downstream Receiver
The MAX1218ECQ+D's dual 12-bit 170 Msps architecture simultaneously samples the I and Q IF outputs of a cable downstream tuner in CMTS (Cable Modem Termination System) headend equipment, capturing 256-QAM or 1024-QAM constellations without compromising symbol-rate headroom. The differential inputs reject common-mode noise from the tuner SAW filters, while the 1.8 V supply simplifies multi-channel card power design. Compared with a 125 Msps MAX1217 in the same family, the MAX1218ECQ+D provides the bandwidth margin needed for 1024-QAM rolloff factors.
推薦
Cellular Base Station IF Sampling
In cellular base-station receivers, the MAX1218ECQ+D digitizes the intermediate-frequency (IF) signal after the mixer stage, feeding the digital data into an FPGA for channelization and demodulation. Dual channels allow simultaneous sampling of antenna diversity paths, while 170 Msps speed supports multi-carrier GSM, WCDMA, and LTE signal bandwidths. The exposed-paddle HTFQFP package provides adequate thermal dissipation for continuous base-station duty cycles at elevated ambient temperatures.
推薦
Medical Ultrasound Beamforming
Medical ultrasound imaging systems require simultaneous sampling of multiple transducer channels for digital beamforming. The MAX1218ECQ+D's dual-channel architecture and 170 Msps rate support high-resolution beamforming front ends, capturing RF echo signals at 40-60 MHz IF while preserving 12-bit dynamic range for tissue harmonic imaging. The compact 100-pin HTFQFP package enables high channel density on portable cart-based ultrasound systems where PCB area is constrained.
推薦
Radar and Electronic Warfare IF Sampling
Wideband radar and electronic-warfare (EW) receivers digitize IF signals directly to maximize information capture and simplify analog signal-path components. The MAX1218ECQ+D delivers 170 Msps dual-channel sampling suitable for narrow-band radar IF or wideband EW channelized receivers, where the dual ADC enables simultaneous main and guard-channel sampling. Its industrial -40°C to +85°C operating range supports ground-mobile and shipboard deployment where thermal stress is significant.
推薦
Test and Measurement Instrumentation
High-end test-and-measurement digitizers such as oscilloscope front ends and spectrum-analyzer IF digitizers require the dual-channel, 170 Msps, 12-bit performance of the MAX1218ECQ+D. The differential inputs accept output from the instrument's last IF stage while rejecting common-mode noise from switching power supplies. Pin-compatibility with the MAX1219 (210 Msps) allows instrument manufacturers to scale a single PCB design across bandwidth tiers, simplifying product-line manufacturing.
推薦
Software Defined Radio (SDR) Baseband Digitization
Software-defined-radio (SDR) platforms digitize the final IF or baseband stage of a radio receiver, allowing channel selection, demodulation, and filtering to be performed entirely in software on an FPGA or DSP. The MAX1218ECQ+D's dual 12-bit 170 Msps ADCs capture both I and Q baseband signals from a quadrature demodulator, enabling wide-bandwidth SDR receivers covering HF through microwave bands. The single 1.8 V supply rail simplifies SDR platform power architecture.
推薦
推薦產品摘要
工程參考資料，適用於 MAX1218ECQ+D — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MAX1217ECQ+TD | MAX1219 |
|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 100-pin HTFQFP (TQFP with exposed paddle) | 100-pin HTFQFP - same | 100-pin HTFQFP - same |
| Resolution | 12 bits | 12 bits | 12 bits |
| Sample Rate | 170 Msps | 125 Msps (-26%) | 210 Msps (+24%) |
| Number of Channels | 2 (dual, simultaneous) | 2 (dual, simultaneous) | 2 (dual, simultaneous) |
| Analog Supply Voltage | 1.8 V | 1.8 V | 1.8 V |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
| Pin-to-Pin Compatible | Yes (baseline) | Yes - drop-in lower speed | Yes - drop-in higher speed |
| Indicative 1k-piece Price | 24.95 USD | Lower (estimate, lower speed grade) | Higher (estimate, higher speed grade) |
主要差異化特點
- Mid-tier speed in a three-part pin-compatible family (對比MAX1217ECQ+TD)
- Lower cost than the faster MAX1219 in the same family (對比MAX1219)
- Dual-channel simultaneous sampling (對比Single-channel ADCs in the same speed class)
設計說明
Clock jitter dominates ADC SNR at high input frequencies. The MAX1218ECQ+D SNR ceiling scales with 1/(2π·fin·tj), so use a sub-picosecond-rms clock source (crystal oscillator with low phase noise or a dedicated clock-cleanup PLL). Route the clock input with controlled impedance, keep it short, and isolate it from noisy digital output traces to prevent jitter coupling into the analog front end.
The 100-pin HTFQFP exposed paddle MUST be soldered to a continuous, low-impedance ground plane for thermal dissipation and electrical performance. Use a via-array (typically 9 or 16 vias in a 3x3 or 4x4 grid) under the paddle to stitch the top and bottom ground planes together. Split analog and digital 1.8 V planes, and use ferrite beads between them to prevent digital switching noise from corrupting the analog supply rail.
Estimated power dissipation: at 170 Msps with 1.8 V analog supply and typical 200 mA per-channel consumption, total power is approximately 0.72 W per IC. Without the exposed paddle soldered to a sufficient copper area, junction temperature may exceed 100°C and trigger thermal shutdown. Verify at least 1 square inch of top-layer copper is dedicated to paddle thermal dissipation under the IC.
Differential analog input traces must be length-matched to within 0.5 mm and routed as a coupled pair with 100 ohm differential impedance. Keep analog input traces away from digital output traces and clock lines to minimize crosstalk. Place bypass capacitors (0.1 µF ceramic plus 10 µF tantalum) as close as possible to each analog and digital supply pin.
合規資訊
RoHS and lead-free compliance inferred from Maxim/ADI product family standards; specific REACH, halogen-free, and AEC-Q100 data not present in verified web results.
