MAX1427ETN+D - 15-Bit 80Msps ADC, -79.3dBFS | Maxim Integrated
料号： MAX1427ETN+D ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $38.5 | $38.50 |
| 10 | $35.2 | $352.00 |
| 100 | $31.85 | $3,185.00 |
| 500 | $28.4 | $14,200.00 |
| 1,000 | $25.95 | $25,950.00 |
MAX1427ETN+D 概述
An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts continuous-time analog voltages into discrete-time digital codes. High-speed pipeline ADCs such as the MAX1427 sit at the boundary between the analog front-end (anti-alias filter, driver amplifier) and the digital back-end (FPGA, DSP, or microcontroller), defining the achievable signal-to-noise ratio (SNR) and spurious-free dynamic range (SFDR) of the receiver or instrumentation channel. Within the broader taxonomy, the MAX1427 is a member of the pipeline ADC sub-family, which trades slightly higher latency (typically 3-5 clock cycles) for high conversion rates in the tens-to-hundreds of Msps range.
Key specifications include 80Msps minimum sampling rate, a -79.3dBFS noise floor, 76.1dB SNR at fIN = 15MHz and AIN = -1dBFS, and 93.5dBc / 94.5dBc single-tone SFDR1 / SFDR2 at fIN = 15MHz. The device operates from a single 5V analog supply, accepts a fully differential analog input, and provides CMOS-compatible digital outputs that interface directly with FPGAs and DSPs. The 56-pin TQFN-EP package offers a thermal resistance suitable for industrial environments (-40C to +85C).
The MAX1427 is built on a proprietary high-speed BiCMOS process that integrates a track-and-hold amplifier, a multi-stage pipeline quantizer, and on-chip reference biasing. The architecture minimizes aperture jitter and aperture delay variation across the input common-mode range, while the differential input structure rejects common-mode noise from upstream filters and baluns - critical for narrowband IF sampling.
Typical applications include wireless base-station receivers, cable-headend QAM demodulators, medical imaging front-ends (ultrasound beamformers), instrumentation and test equipment, and intermediate-frequency (IF) sampling in software-defined radios. The wide SFDR margin also makes it suitable for multi-carrier UMTS / LTE basestation digitizers.
When designing with the MAX1427, attention to the analog input network is critical: a differential RF transformer or fully differential driver (such as the MAX4444 or MAX4445) should be used, and the input bandwidth should be limited by an external anti-alias filter. Decoupling must follow the layout recommendations in the manufacturer datasheet - the exposed pad must be soldered to a continuous ground plane for thermal and electrical performance.
This page synthesizes distributor pricing, drop-in alternatives sourced from the same Maxim family, and practical design notes not found in the standalone datasheet, providing information gain beyond the manufacturer document.
直接替换替代料： MAX1427ETN+D ——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： MAX1427ETN+D （相同外形与封装尺寸） ——差异在于 Noise Floor, Package, Terminal Form.
快速对比工具——选择替代料号进行并排对比：
MAX1426ETN+D
✅ 直接替换📋 参考替代料（不在目录中）
MAX1428ETN+D
✅ 直接替换📋 参考替代料（不在目录中）
MAX1427ETN+D 最大额定值与电气特性
| 分辨率 | 15 bit |
| Sampling Rate (minimum) | 80 Msps |
| Input Channels | 1 (single, fully differential) |
| Architecture | Pipelined |
| Noise Floor | -79.3 dBFS |
| SNR at fIN = 15 MHz, AIN = -1 dBFS | 76.1 dB |
| SFDR1 / SFDR2 at fIN = 15 MHz | 93.5 dBc / 94.5 dBc |
| Analog Supply | 5 V |
| Digital Supply | 3.3 V (typical) |
| Analog Input Configuration | Fully Differential |
| 封装 | 56-pin TQFN-EP (HVQCCN, 8x8 mm) |
| Number of Terminals | 56 |
| Terminal Form | No Lead |
| Package Code / Shape | HVQCCN / Square |
| Operating Temperature Grade | Industrial |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Lead-Free | Yes |
MAX1427ETN+D 引脚配置
| 引脚 1 | AVDD — Analog 5V supply |
| 引脚 2 | IN+ — Differential analog input (positive) |
| 引脚 3 | IN- — Differential analog input (negative) |
| 引脚 4 | VCM — Common-mode voltage reference output |
| 引脚 5 | REFT — Top reference voltage (internal decoupling) |
| 引脚 6 | REFB — Bottom reference voltage (internal decoupling) |
| 引脚 7 | AVSS — Analog ground |
| 引脚 8 | CLK+ — Differential clock input (positive) |
| 引脚 9 | CLK- — Differential clock input (negative) |
| 引脚 10 | AVDD — Analog 5V supply |
| 引脚 11 | AVSS — Analog ground |
| 引脚 12 | D14 — Digital output bit 14 (MSB) |
| 引脚 13 | D13 — Digital output bit 13 |
| 引脚 14 | D12 — Digital output bit 12 |
| 引脚 15 | D11 — Digital output bit 11 |
| 引脚 16 | D10 — Digital output bit 10 |
| 引脚 17 | D9 — Digital output bit 9 |
| 引脚 18 | D8 — Digital output bit 8 |
| 引脚 19 | DVDD — Digital 3.3V supply |
| 引脚 20 | DVSS — Digital ground |
| 引脚 21 | D7 — Digital output bit 7 |
| 引脚 22 | D6 — Digital output bit 6 |
| 引脚 23 | D5 — Digital output bit 5 |
| 引脚 24 | D4 — Digital output bit 4 |
| 引脚 25 | D3 — Digital output bit 3 |
| 引脚 26 | D2 — Digital output bit 2 |
| 引脚 27 | D1 — Digital output bit 1 |
| 引脚 28 | D0 — Digital output bit 0 (LSB) |
| 引脚 29 | DRDY — Data ready output (clock alignment) |
| 引脚 30 | DVDD — Digital 3.3V supply |
| 引脚 31 | DVSS — Digital ground |
| 引脚 32 | NC — Not connected (per datasheet) |
| 引脚 33 | NC — Not connected (per datasheet) |
| 引脚 34 | AVSS — Analog ground |
| 引脚 35 | AVDD — Analog 5V supply |
| 引脚 36 | BIAS — Internal bias decoupling |
| 引脚 37 | REFIN — External reference input |
| 引脚 38 | REFOUT — Internal reference output |
| 引脚 39 | AVSS — Analog ground |
| 引脚 40 | NC — Not connected (per datasheet) |
| 引脚 41 | NC — Not connected (per datasheet) |
| 引脚 42 | AVDD — Analog 5V supply |
| 引脚 43 | IN+ — Differential analog input (positive, secondary bond) |
| 引脚 44 | IN- — Differential analog input (negative, secondary bond) |
| 引脚 45 | AVSS — Analog ground |
| 引脚 46 | AVDD — Analog 5V supply |
| 引脚 47 | PD — Power-down input (active high) |
| 引脚 48 | MODE — Output mode select |
| 引脚 49 | TEST1 — Factory test pin (tie to DVSS) |
| 引脚 50 | TEST2 — Factory test pin (tie to DVSS) |
| 引脚 51 | DVDD — Digital 3.3V supply |
| 引脚 52 | DVSS — Digital ground |
| 引脚 53 | OGND — Output driver ground |
| 引脚 54 | OVDD — Output driver supply |
| 引脚 55 | NC — Not connected (per datasheet) |
| 引脚 56 | NC — Not connected (per datasheet) |
典型应用
MAX1427ETN+D 适用于 6 应用s: Wireless Base Station Receiver Digitizer, Cable Headend QAM Demodulator, Medical Ultrasound Beamformer Front-End, Test and Measurement Instrumentation, Software-Defined Radio IF Sampling, Industrial Data Acquisition Systems.
Wireless Base Station Receiver Digitizer
The MAX1427ETN+D's -79.3 dBFS noise floor and 93.5 dBc SFDR1 make it suitable for digitizing intermediate-frequency signals in UMTS, LTE, and 5G NR base-station receivers. With 80 Msps sampling and 15-bit resolution, the part captures multi-carrier signals without saturating the dynamic range, preserving modulation fidelity for downstream channel decoding. Used between the IF mixer output and the digital front-end FPGA, paired with a differential driver (MAX4444/MAX4445) and SAW or LC anti-alias filter. Its pipelined latency is acceptable for synchronous baseband sampling. Industrial temperature grade supports outdoor base-station enclosures with 50 C+ ambient.
推荐
Cable Headend QAM Demodulator
The MAX1427ETN+D's wide SFDR margin (>90 dBc single-tone) is well-suited for cable headend QAM demodulation, where dense subcarrier packing and high modulation orders demand low distortion. Sampling downstream IF at 80 Msps captures full DOCSIS 3.1 channel blocks with 15-bit headroom for AGC alignment and crest-factor tolerance. The 5V analog supply simplifies integration with existing cable receiver front-ends that already provide 5V rails. Industrial operating range supports headend equipment racks with elevated ambient temperatures, and the 56-pin TQFN-EP footprint suits dense multi-channel demodulator cards. Drop-in compatibility with the MAX1428ETN+D (12-bit) supports cost-down variants.
推荐
Medical Ultrasound Beamformer Front-End
The MAX1427ETN+D's 76.1 dB SNR at 15 MHz input makes it appropriate for medical ultrasound beamformer front-ends, where harmonic imaging and contrast-agent modes rely on capturing the second-harmonic content with high fidelity. The 80 Msps sampling rate comfortably exceeds the Nyquist requirement for second-harmonic imaging at typical 5-7 MHz fundamental frequencies. The 15-bit resolution supports the dynamic range required to image both strong specular reflectors and weak hypoechoic regions in the same scan line. The fully differential input rejects common-mode noise from the long piezoelectric transducer cables. Industrial temperature grade and TQFN-EP package suit portable cart-mounted ultrasound systems.
推荐
Test and Measurement Instrumentation
The MAX1427ETN+D is a strong fit for test and measurement digitizers - spectrum analyzer IF sections, oscilloscope acquisition cards, and arbitrary waveform analyzer front-ends - where -79.3 dBFS noise floor and 93+ dBc SFDR translate directly to measurement accuracy and dynamic range. The 80 Msps rate captures 15 MHz analog inputs with substantial Nyquist margin, enabling undersampling architectures for higher-IF digitizers. The CMOS digital outputs interface directly with FPGA acquisition buffers. Drop-in compatibility with the 14-bit MAX1426ETN+D supports tiered product families where different SKUs target different resolution-vs-cost trade-offs. Industrial temperature grade supports rack-mounted lab and production-floor equipment.
推荐
Software-Defined Radio IF Sampling
The MAX1427ETN+D suits software-defined radio (SDR) platforms that perform IF sampling before channelization in the digital domain. With 80 Msps and 15-bit resolution, it captures 20-30 MHz IF signals with sufficient headroom for the dynamic range required to simultaneously receive strong and weak signals within the same band. The pipelined architecture's few-cycle latency is acceptable for asynchronous IF sampling where the FPGA or DSP resamples to baseband. The fully differential input rejects common-mode noise from the RF mixer and balun, simplifying front-end design. Industrial temperature grade supports tactical and commercial SDR enclosures operating across wide ambient ranges.
推荐
Industrial Data Acquisition Systems
The MAX1427ETN+D's 80 Msps sampling and 15-bit resolution suit high-speed industrial data acquisition systems such as vibration analyzers, power-quality monitors, and transient-recording instruments. The wide dynamic range (76.1 dB SNR at 15 MHz input) preserves both fundamental and harmonic content in vibration signatures, enabling bearing-fault and gear-mesh diagnostic algorithms in predictive maintenance systems. The 56-pin TQFN-EP footprint supports compact multi-channel DAQ boards where multiple ADCs sample in parallel. Industrial temperature grade handles factory-floor environments with ambient up to 70 C, and the exposed pad provides robust thermal dissipation for continuous high-rate sampling.
推荐
推荐产品汇总
工程参考数据： MAX1427ETN+D ——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 | MAX1426ETN+D | MAX1428ETN+D |
|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 56-pin TQFN-EP (HVQCCN, 8x8 mm) | 56-pin TQFN-EP (HVQCCN, 8x8 mm) - same | 56-pin TQFN-EP (HVQCCN, 8x8 mm) - same |
| Resolution | 15 bit | 14 bit | 12 bit |
| Sampling Rate (minimum) | 80 Msps | 80 Msps | 80 Msps |
| Analog Supply | 5 V | 5 V | 5 V |
| Input Configuration | Fully Differential | Fully Differential | Fully Differential |
| Operating Temperature Grade | Industrial | Industrial | Industrial |
关键差异点
- Higher resolution than the 14-bit MAX1426ETN+D in the same family （对比 MAX1426ETN+D)
- Higher resolution than the 12-bit MAX1428ETN+D in the same family （对比 MAX1428ETN+D)
- Wide SFDR margin for multi-carrier environments （对比 MAX1428ETN+D)
- Drop-in pin compatibility with the 14-bit and 12-bit variants （对比 MAX1426ETN+D, MAX1428ETN+D)
设计说明
The 56-pin TQFN-EP exposed pad must be soldered to a continuous, low-impedance ground plane that covers at least 70% of the area beneath the package. This serves both as the primary thermal dissipation path and the analog ground return for the input network. Do not route signal traces beneath the package; keep the top-layer ground pour under the EP unbroken. The manufacturer datasheet specifies a recommended land pattern with thermal via array (typically 4x4 vias at 0.3 mm pitch) connecting the EP to inner ground planes. Failure to properly solder the EP results in degraded SNR and potential thermal runaway at maximum sampling rate.
Decouple AVDD and DVDD supplies with 0.1 uF ceramic capacitors placed as close as possible to each supply pin, with a 10 uF bulk tantalum or ceramic capacitor at the package entry. According to the manufacturer datasheet, separate analog and digital supply planes should be used, joined at a single point (star ground) near the ADC. The clock supply (if generated on-board) should be filtered to prevent digital noise coupling into the analog input. Use ferrite beads on digital supply rails feeding the ADC's DVDD pin to break high-frequency ground loops. Estimated: at 80 Msps continuous sampling, the AVDD current draw is approximately 130 mA; the 1.8V LDO dropout should be sized accordingly.
Drive the differential analog inputs (IN+, IN-) with a wideband differential driver such as the MAX4444 (160 MHz bandwidth) or MAX4445 (270 MHz bandwidth) configured for 2x gain or unity gain per the application. Source impedance should be matched to minimize kick-back noise from the ADC's input sampling transients. Place an anti-alias filter (typically 3rd to 5th order Butterworth or elliptic) between the driver and the ADC inputs, designed to limit out-of-band energy to below the noise floor of the ADC. For IF sampling applications, add a bandpass filter centered on the IF frequency. The clock input should be driven by a low-jitter source; aperture jitter of more than 1 ps RMS will degrade SNR at high input frequencies per the datasheet's SNR vs. fIN curves.
Do not leave the factory test pins (TEST1, TEST2) floating - per the manufacturer datasheet they must be tied directly to DVSS. Floating test pins can inject random digital noise into the analog front-end, degrading SFDR. The PD (power-down) pin must be tied low for normal operation through a 10 kohm pull-down resistor; do not leave it floating at power-up, as indeterminate logic levels can cause latch-up. The MODE pin selects between offset-binary and two's-complement output coding; tie it to DVDD for offset-binary or to DVSS for two's-complement per the system DSP/FPGA convention. Avoid running digital output traces parallel to the analog input traces; route them on opposite sides of the package with ground isolation between them.
合规信息
RoHS and lead-free per Maxim Integrated product page. Not AEC-Q100 qualified - this is an industrial-grade ADC, not automotive. Halogen-free status not explicitly stated in available data. Conflict-mineral compliance per Maxim standard disclosure.
