MAX1218ECQ+TD - Dual 12-Bit 170Msps ADC, 100-TQFP | Maxim Integrated
MPN： MAX1218ECQ+TD ✓ 啟用中MAX1218ECQ+TD 概覽
What is a high-speed ADC: A high-speed analog-to-digital converter is a data-conversion integrated circuit that samples continuous analog signals at multi-megasample-per-second rates and produces a parallel or serial digital code, allowing wideband signals in the MHz to hundreds-of-MHz range to be digitized for downstream DSP, FPGA, or ASIC processing. High-speed ADCs sit in the converter branch of the data-converter IC hierarchy, which itself is a sub-category of signal-chain semiconductor products that also includes DACs and codecs. They enable software-defined radio, instrumentation, and broadband imaging systems that previously required discrete analog front ends.
Key features of the MAX1218ECQ+TD include 12-bit resolution across two simultaneously-sampling ADCs, a 170Msps maximum conversion rate, internal bandgap reference, and TTL/CMOS-compatible clock inputs. The dual architecture lets designers capture I/Q baseband or interleaved IF signals in a single chip, reducing board area and the phase-matching complexity of two discrete converters. The exposed-paddle HTFQFP package provides a low theta-JA path for the moderate heat generated when both channels are active at full sample rate.
The MAX1218 uses a pipelined conversion architecture with proprietary calibration to achieve low spurious content and good spurious-free dynamic range across its operating range. The device operates from a single 1.8V analog supply, with a separate digital I/O supply allowing direct interfacing to 1.8V to 3.3V logic families without external level shifters.
Typical applications include software-defined radio receivers, medical imaging front ends such as ultrasound beamformers, high-end instrumentation and oscilloscope front ends, and broadband IF sampling in communications infrastructure.
When laying out the PCB for the MAX1218ECQ+TD, dedicate a solid ground plane beneath the exposed paddle and use controlled-impedance differential routing for analog inputs; the digital outputs should be length-matched if both channels feed a parallel FPGA interface. Decouple each supply pin with 100nF ceramic placed as close as possible to the package.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives drawn from the same Maxim ADC family, and practical layout notes beyond what is reprinted in the manufacturer datasheet PDF.
直接替換替代品，適用於 MAX1218ECQ+TD — 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+TD （相同外形與佔位） — 差異在於 Package, Architecture, Input Type, Number of Channels, Operating Temperature Range.
MAX1217ECQ+TD
✅ 直接替換聯絡詢價
查看資料表 →MAX1219
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MAX1218ECQ+TD 最大額定值與電氣特性
| 功能 | Dual 12-bit analog-to-digital converter |
| Number of ADCs | 2 |
| 解析度 | 12 bit |
| Sampling Rate (max) | 170 Msps |
| Input Type | Differential analog inputs |
| Architecture | Pipelined, proprietary calibration |
| Analog Supply Voltage | 1.8 V (typical) |
| Digital I/O Supply | 1.8 V to 3.3 V |
| Clock Input | TTL/CMOS compatible |
| Reference | Internal bandgap |
| Temperature Grade | Industrial |
| 工作溫度範圍 | -40C to +85C |
| 封裝 | 100-pin HTFQFP with exposed paddle |
| Terminal Form | Gull Wing |
| Package Code | HTFQFP |
| RoHS 狀態 | Compliant |
MAX1218ECQ+TD htfqfp 腳位配置指南
MAX1218ECQ+TD（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+TD.
請參閱 資料表 以查看完整腳位配置。
典型應用
MAX1218ECQ+TD 適用於 6 應用s: Software-Defined Radio Receiver, Medical Ultrasound Beamformer, Digital Oscilloscope Front End, Broadband IF Sampling in Communications, Radar Signal Processing, Automated Test Equipment (ATE).
Software-Defined Radio Receiver
The MAX1218ECQ+TD digitizes the I and Q baseband outputs of a quadrature demodulator simultaneously, using the part's dual 12-bit 170Msps ADC channels and TTL/CMOS-compatible clock input. The 12-bit resolution and 170Msps per-channel rate provide enough dynamic range and Nyquist headroom for capturing wideband signals up to ~80MHz baseband, while the 100-pin HTFQFP exposed paddle keeps the dissipation manageable. The 1.8V analog rail with separate 1.8-3.3V digital I/O lets the ADC drive an FPGA sample memory directly, removing the level-translator stage typical of legacy 5V ADC parts.
推薦
Medical Ultrasound Beamformer
Ultrasound front ends rely on multiple synchronized ADC channels to capture returning echoes at high sample rates. The MAX1218ECQ+TD integrates two 12-bit 170Msps converters per package, allowing a single chip per channel pair and reducing the channel-to-channel skew inherent to multi-chip ADC arrays. The exposed-paddle HTFQFP package provides the thermal headroom needed when both channels run continuously at full rate, and the industrial -40C-to-+85C temperature range supports the thermal environment of cart-based ultrasound machines.
推薦
Digital Oscilloscope Front End
Bench and modular oscilloscopes in the 100-200MHz bandwidth class pair wideband front-end attenuators with high-speed ADCs. The MAX1218ECQ+TD delivers 12-bit resolution at 170Msps per channel, suiting 4- or 8-channel oscilloscope designs where two adjacent scope channels map to one ADC chip. The exposed-paddle 100-pin HTFQFP package simplifies board layout by allowing the analog inputs and clock to be routed close to the front-end amplifiers, with the digital outputs running into an FPGA capture buffer.
推薦
Broadband IF Sampling in Communications
Modern radio receivers increasingly sample the intermediate frequency directly rather than using a final analog demodulator, a technique known as IF sampling. The MAX1218ECQ+TD's 170Msps rate supports IF frequencies well above 70MHz, and the dual channel lets designers capture I/Q IF simultaneously with matched latency. The industrial temperature range and exposed-paddle thermal path make the part suitable for outdoor base-station units where the ADC sits next to a hot upstream downconverter.
推薦
Radar Signal Processing
Pulsed-Doppler and FMCW radar systems digitize returns from microwave mixers, requiring simultaneous high sample rate and good spurious-free dynamic range. The MAX1218ECQ+TD's pipelined architecture and 12-bit resolution fit short-range industrial radar modules such as level gauges and security sensors. The 100-pin HTFQFP exposed paddle package enables dense PCB layouts where the ADC sits between the radar mixer and the DSP/FPGA, keeping the analog input traces short and the digital outputs terminated close to the processor.
推薦
Automated Test Equipment (ATE)
ATE platforms digitize multi-megasample waveforms from device-under-test pins with strict timing alignment. The MAX1218ECQ+TD's dual 170Msps channels capture two test channels per IC while the TTL/CMOS clock input allows direct drive from the tester timing generator, removing the need for an external clock buffer. Industrial -40C-to-+85C operation supports ATE placed in factory-floor cabinets, and the 12-bit resolution covers parametric measurement thresholds for mixed-signal ICs.
推薦
推薦產品摘要
工程參考資料，適用於 MAX1218ECQ+TD — 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 |
|---|---|---|---|
| Package | 100-pin HTFQFP (exposed paddle) | 100-pin HTFQFP - same | 100-pin TQFP (exposed paddle) - same |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 12 bit | 12 bit | 12 bit |
| Number of Channels | 2 (dual) | 2 (dual) | 2 (dual) |
| Sampling Rate | 170 Msps | 125 Msps | 210 Msps |
| Analog Supply | 1.8 V | 1.8 V | 1.8 V |
| Digital I/O Supply | 1.8 V to 3.3 V | 1.8 V to 3.3 V | 1.8 V to 3.3 V |
| Operating Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C |
主要差異化特點
- Dual 12-bit 170Msps channels on one die (對比MAX1217ECQ+TD)
- Pin-compatible drop-in family spans 125-210Msps (對比MAX1219)
- Single 1.8V analog rail with adjustable digital I/O (對比MAX1217ECQ+TD)
設計說明
Dedicate a continuous unbroken ground plane directly beneath the MAX1218ECQ+TD exposed paddle. Use 100nF X7R ceramic bypass capacitors within 2-3mm of each supply pin, supplemented by a bulk 10uF tantalum or polymer cap on the analog rail. Route the analog input pairs as 100-ohm differential traces with length-matched positive and negative legs to preserve common-mode rejection and balance.
Keep the analog input traces as short as possible and isolated from the digital outputs by routing them on opposite sides of the package or separated by a ground moat. The MAX1218ECQ+TD outputs a 12-bit parallel LVCMOS-style data bus; place a 33 ohm series damping resistor near each digital output if the run exceeds roughly 25mm to limit overshoot on the FPGA-side termination.
Solder the central exposed paddle to a copper pad with at least 1 square inch of copper on each internal PCB layer stitched with thermal vias. With both channels running at 170Msps the part dissipates noticeable power, so without the paddle soldered properly the junction temperature can exceed the 125C maximum even within the industrial ambient range.
合規資訊
RoHS compliant per Maxim Integrated product page. AEC-Q100 not applicable - this is a data-converter IC, not an automotive analog component. Halogen-free status not stated in the verified web data.
