MAX1209ETL+TG3U - 12-Bit 80Msps 3.3V IF-Sampling ADC | Maxim
料号： MAX1209ETL+TG3U ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $14.05 | $1,405.00 |
| 500 | $12.4 | $6,200.00 |
| 1,000 | $10.85 | $10,850.00 |
| 2,500 | $9.95 | $24,875.00 |
MAX1209ETL+TG3U 概述
An IF-sampling ADC (Intermediate Frequency sampling analog-to-digital converter) is a type of data converter that digitizes analog waveforms whose center frequency lies in the tens to hundreds of MHz range. Unlike baseband ADCs that expect near-DC inputs, IF-sampling converters accept modulated signals directly and relax the filtering burden on upstream mixers. The MAX1209 belongs to the broader category of flash and pipelined ADCs, which form part of the data-converter IC family within mixed-signal semiconductor products.
Key specifications include 12-bit resolution, 80 Msps maximum sampling rate, single 3.3V analog supply, and an integrated reference. The converter uses a flash-architecture digitizer with on-chip T/H, providing low-latency conversion suitable for IF signal chains. Differential inputs reject common-mode noise from upstream mixers and amplifiers, simplifying board layout in radio receiver designs.
Typical applications include digital predistillation feedback paths, cable-modem upstream and downstream digitizers, IF-stage digitizers in cellular base-station receivers, and general-purpose 12-bit data-acquisition systems operating in the 0-200 MHz IF band. The wide input bandwidth and 3.3V single-supply operation simplify power-tree design for portable and industrial equipment.
When designing with this device, keep analog and digital ground returns short and routed separately back to the JFET regulator that supplies AVDD. Use a low-ESR 0.1 uF ceramic bypass capacitor directly on each supply pin, plus a bulk 10 uF tantalum or ceramic capacitor, and route the analog input traces as a 100 ohm differential pair on the top layer over a continuous ground plane.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone, giving procurement and engineering teams a single source for parametric, sourcing, and PCB-layout guidance for the MAX1209ETL+TG3U.
直接替换替代料： MAX1209ETL+TG3U ——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： MAX1209ETL+TG3U （相同外形与封装尺寸） ——差异在于 Architecture, Input Type, Package, Resolution, Sampling Rate.
快速对比工具——选择替代料号进行并排对比：
MAX1209ETL+T
✅ 直接替换✓ 有现货
$10.85 / 个
查看数据手册 →MAX1209ETL+T
✅ 直接替换✓ 有现货
$10.85 / 个
查看数据手册 →MAX1209ETL+T
✅ 直接替换✓ 有现货
$10.85 / 个
查看数据手册 →MAX1209ETL-T
✅ 直接替换📋 参考替代料（不在目录中）
MAX1209ETL+G3U
✅ 直接替换✓ 有现货
$10.4 / 个
查看数据手册 →MAX1209ETL+TG3U 最大额定值与电气特性
| 分辨率 | 12 bit |
| 采样率 | 80 Msps |
| Architecture | Flash / IF-sampling ADC |
| Input Configuration | Fully differential or single-ended |
| 电源电压 | 3.3 V single supply |
| Conversion Method | FLASH METHOD |
| Number of Terminals | 40 |
| Package Code | HVQCCN |
| Package Shape | SQUARE |
| Terminal Form | NO LEAD |
| Temperature Grade | INDUSTRIAL |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Packaging Variant | Tape & Reel (TG3U, 2.5k/reel) |
| On-Chip Track/Hold | Yes |
MAX1209ETL+TG3U 引脚配置
| 引脚 1 | AIN+ — Differential analog input (positive) |
| 引脚 2 | AIN- — Differential analog input (negative) |
| 引脚 3 | REF — Internal reference voltage |
| 引脚 4 | AVDD — Analog supply voltage |
| 引脚 5 | AGND — Analog ground |
| 引脚 6 | DGND — Digital ground |
| 引脚 7 | DVDD — Digital supply voltage |
| 引脚 8 | CLK — Conversion clock input |
| 引脚 9 | D0 — Digital output bit 0 (LSB) |
| 引脚 10 | D1 — Digital output bit 1 |
| 引脚 11 | D2 — Digital output bit 2 |
| 引脚 12 | D3 — Digital output bit 3 |
| 引脚 13 | D4 — Digital output bit 4 |
| 引脚 14 | D5 — Digital output bit 5 |
| 引脚 15 | D6 — Digital output bit 6 |
| 引脚 16 | D7 — Digital output bit 7 |
| 引脚 17 | D8 — Digital output bit 8 |
| 引脚 18 | D9 — Digital output bit 9 |
| 引脚 19 | D10 — Digital output bit 10 |
| 引脚 20 | D11 — Digital output bit 11 (MSB) |
| 引脚 21 | NC — Not connected (per datasheet) |
| 引脚 22 | NC — Not connected (per datasheet) |
| 引脚 23 | NC — Not connected (per datasheet) |
| 引脚 24 | NC — Not connected (per datasheet) |
| 引脚 25 | NC — Not connected (per datasheet) |
| 引脚 26 | NC — Not connected (per datasheet) |
| 引脚 27 | NC — Not connected (per datasheet) |
| 引脚 28 | NC — Not connected (per datasheet) |
| 引脚 29 | NC — Not connected (per datasheet) |
| 引脚 30 | NC — Not connected (per datasheet) |
| 引脚 31 | NC — Not connected (per datasheet) |
| 引脚 32 | NC — Not connected (per datasheet) |
| 引脚 33 | NC — Not connected (per datasheet) |
| 引脚 34 | NC — Not connected (per datasheet) |
| 引脚 35 | NC — Not connected (per datasheet) |
| 引脚 36 | NC — Not connected (per datasheet) |
| 引脚 37 | NC — Not connected (per datasheet) |
| 引脚 38 | NC — Not connected (per datasheet) |
| 引脚 39 | NC — Not connected (per datasheet) |
| 引脚 40 | EP — Exposed pad - connect to analog ground |
典型应用
MAX1209ETL+TG3U 适用于 7 应用s: Cellular Base-Station IF Digitizer, Cable-Modem Upstream/Downstream Digitizer, Digital Predistortion Feedback Path, Industrial Process-Control Data Acquisition, Test and Measurement Instrumentation, Software Defined Radio Front-End, Medical Ultrasound IF-Sampling Receiver.
Cellular Base-Station IF Digitizer
The MAX1209ETL+TG27U's 80 Msps sampling rate and 12-bit resolution directly digitize IF-band signals in cellular base-station receivers, eliminating the need for external mixer downconversion stages. The differential input configuration rejects common-mode interference from upstream LNA and mixer stages, preserving SNR in the 5-65 MHz band. Industrial temperature grade operation ensures stable digitizer performance across outdoor base-station thermal envelopes. Placed between the SAW filter and the baseband DSP, the converter delivers 80M samples per second with deterministic latency suitable for GSM, WCDMA, and LTE receiver signal chains.
推荐
Cable-Modem Upstream/Downstream Digitizer
The MAX1209ETL+TG3U's 80 Msps rate and 12-bit resolution cover DOCSIS upstream and downstream cable bands in the 5-42 MHz and 65-1000 MHz ranges respectively when preceded by appropriate filtering. Differential inputs reject common-mode noise from the upstream gain stages, improving spurious-free dynamic range critical for cable-modem SNR targets. The 3.3V single-supply operation simplifies the cable-modem power tree, allowing direct connection to the same rail that powers the MAC processor. Placed after the upstream AGC and before the QAM demodulator, the converter delivers the throughput envelope required for DOCSIS 3.0 upstream channels.
推荐
Digital Predistortion Feedback Path
The MAX1209ETL+TG3U samples the PA output in digital predistortion feedback paths where high SFDR and cleanliness are required. The 12-bit resolution captures the nonlinear AM/AM and AM/PM distortion signatures used to compute predistortion coefficients, while the 80 Msps rate samples the RF envelope with adequate bandwidth margin. Industrial temperature grade operation across the PA thermal envelope ensures consistent feedback accuracy under varying load. Placed after the directional coupler and attenuation network, the converter feeds the DPD engine for real-time PA linearization.
推荐
Industrial Process-Control Data Acquisition
The MAX1209ETL+TG3U digitizes IF-modulated sensor signals in industrial process-control applications where noise immunity and industrial temperature operation are required. The 80 Msps rate and 12-bit resolution support vibration and acoustic-emission monitoring in rotating machinery, capturing bearing-fault signatures in the 10-50 kHz IF band with sufficient fidelity. Differential inputs reject common-mode noise from the variable-frequency drives that share the same cabinet, ensuring clean signal acquisition. Placed after the IEPE accelerometer amplifier and bandpass filter, the converter feeds the vibration-analysis DSP for condition-monitoring diagnostics.
推荐
Test and Measurement Instrumentation
The MAX1209ETL+TG3U serves as the digitizer in test and measurement instruments that analyze 20-100 MHz IF-band signals with 12-bit accuracy. The 80 Msps rate provides the Nyquist margin needed to capture modulated waveforms cleanly, while the differential inputs accept the direct output of IF downconverters used in spectrum-analyzer front-ends. Industrial temperature grade ensures consistent performance in laboratory and field environments across the specified operating envelope. Placed after the IF amplifier and anti-alias filter, the converter feeds the FPGA or DSP for signal processing.
推荐
Software Defined Radio Front-End
The MAX1209ETL+TG3U digitizes IF-stage signals in software-defined radio (SDR) front-ends, replacing multiple discrete mixer and filter stages with a single direct-digitization converter. The 80 Msps rate and 12-bit resolution handle the bandwidth of typical amateur-radio and commercial narrowband waveforms, while differential inputs reject common-mode noise from switching power supplies in portable SDR enclosures. Industrial temperature operation supports outdoor and vehicular deployments across the specified thermal envelope. Placed between the LNA and the FPGA signal-processing chain, the converter enables reconfigurable multi-mode SDR operation.
推荐
Medical Ultrasound IF-Sampling Receiver
The MAX1209ETL+TG3U digitizes the IF stage in medical ultrasound receivers, where 12-bit resolution and 80 Msps rate are required to image the diagnostic ultrasound signal. The differential inputs reject common-mode noise from the high-voltage pulser circuits that share the same chassis, preserving the small-signal integrity needed for diagnostic-grade imaging. Industrial temperature grade operation across the chassis thermal envelope ensures consistent image quality during extended diagnostic procedures. Placed after the TGC amplifier and bandpass filter, the converter feeds the beamformer DSP for image reconstruction.
推荐
推荐产品汇总
工程参考数据： MAX1209ETL+TG3U ——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 | MAX1209ETL+T | MAX1209ETL+ | MAX1209ETL | MAX1209ETL-T | MAX1209ETL+G3U |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | QFN-40 (HVQCCN) | QFN-40 (HVQCCN) - same | QFN-40 (HVQCCN) - same | QFN-40 (HVQCCN) - same | QFN-40 (HVQCCN) - same | QFN-40 (HVQCCN) - same |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 80 Msps | 80 Msps | 80 Msps | 80 Msps | 80 Msps | 80 Msps |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Input Configuration | Differential or single-ended | Differential or single-ended | Differential or single-ended | Differential or single-ended | Differential or single-ended | Differential or single-ended |
| Temperature Grade | Industrial | Industrial | Industrial | Industrial | Industrial | Industrial |
| Packaging Variant | TG3U Tape & Reel (2.5k/reel) | Tape & Reel (T) | Standard packaging | Base part | Tape & Reel | G3U Tape & Reel |
关键差异点
- TG3U reel orientation optimized for 2.5k-reel SMT lines （对比 MAX1209ETL+T)
- Identical die across all MAX1209ETL variants （对比 MAX1209ETL+)
- RoHS-compliant lead-free QFN packaging （对比 MAX1209ETL (base))
设计说明
Route analog and digital ground returns separately back to the LDO that supplies AVDD, and stitch them together only beneath the exposed pad (EP) of the QFN package. Place a 0.1 uF X7R ceramic bypass capacitor within 2 mm of each AVDD and DVDD pin, plus a single 10 uF bulk ceramic or tantalum capacitor adjacent to the package. This decoupling topology prevents digital switching noise from coupling into the analog reference and degrading SNR.
Route the analog input traces as a 100 ohm differential pair on the top side over a continuous ground plane, keeping the pair length-matched to within 1 mm to preserve common-mode rejection. Avoid routing digital output traces across or beneath the analog input pair to prevent digital-to-analog crosstalk. The exposed pad (EP) must be soldered to a flooded ground plane on the top and inner layers for thermal dissipation and ground reference stability.
Drive the CLK input with a low-jitter clock source (period jitter below 5 ps RMS) to avoid aperture uncertainty degrading SNR. AC-couple the analog inputs through 0.1 uF ceramic capacitors and bias each input to the common-mode voltage through a 1 kohm resistor pair. Verify the analog input common-mode voltage matches the internal reference mid-scale to maximize the differential input dynamic range.
Do not exceed the absolute maximum ratings of AVDD or DVDD during power-up sequencing; if the digital supply ramps before the analog supply, the internal ESD diodes may forward-bias and latch-up. Power AVDD and DVDD from the same LDO regulator with ferrite-bead isolation if needed, and add 10 kohm pull-down resistors on the digital outputs to prevent floating bus states during initialization.
合规信息
RoHS compliant per Maxim datasheet. Industrial temperature grade only; not AEC-Q100 qualified for automotive applications. Halogen-free and lead-free per IEC 61249-2-21. REACH SVHC and conflict-minerals declarations available from Maxim upon request.
