MAX1209ETL+G3U - 12-Bit 80Msps IF-Sampling ADC | Analog Devices
MPN: MAX1209ETL+G3U ✓ Hoạt độngMAX1209ETL+G3U Tóm tắt
An ADC (analog-to-digital converter) is a data-conversion integrated circuit that samples a continuous analog voltage and quantizes it into a binary code word. The MAX1209ETL+G3U sits in the high-speed, moderate-resolution sub-family of ADCs (commonly called IF-sampling or pipelined ADCs) and is used in systems where analog signal chains must hand off to a digital signal processor or FPGA. Within the broader taxonomy, it is an ADC -> data converter -> mixed-signal IC -> integrated circuit -> semiconductor.
Key specifications include 80 Msps sampling rate, 12-bit resolution, 3.3V single-supply operation, and a fully differential input structure. The wideband T/H front end supports input bandwidths well above the Nyquist frequency for 80 Msps operation, enabling direct IF sampling of intermediate-frequency signals in radio receivers. The internal quantizer is optimized for low spurious content across the Nyquist band.
Architecturally, the MAX1209ETL uses a pipelined multi-stage topology, with each stage resolving a subset of bits and passing the residue to the next, while digital error correction restores full 12-bit accuracy. The wideband track-and-hold captures fast transients accurately so the quantizer sees a stable DC-like level, minimizing aperture-jitter-induced noise. LVTTL/CMOS-compatible digital outputs simplify interfacing to FPGAs and ASICs without external level translation.
Typical applications include cellular base-station IF digitizers, cable-modem downstream receivers, digital oscilloscopes, ultrasound front ends, and radar/electronic-warfare IF receivers. The 3.3V supply and 12-bit resolution strike a balance between dynamic range and power, making the part a workhorse in mid-tier wireless and test-and-measurement designs.
When designing with this device, place the analog input anti-alias filter before the T/H input, use a low-jitter sampling clock to preserve SNR, and provide a solid ground plane plus adequate decoupling on AVDD and DRVDD to avoid degrading the 12-bit noise floor. The exposed pad must be soldered to a sufficiently large copper pour for thermal dissipation and for low-impedance return paths to the analog ground.
Bộ thay thế dễ dàng lắp đặt cho MAX1209ETL+G3U — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MAX1209ETL+G3U (cùng hình factor và footprint) — khác nhau ở Architecture, Operating Temperature, Resolution, Analog Supply Voltage, Input Configuration.
MAX1209ETL+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1209ETL+T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1208ETL+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1207ETL+
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1209ETL+G3U Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bits |
| Tỷ lệ lấy mẫu | 80 Msps |
| Number of Channels | 1 |
| Input Type | Fully Differential or Single-Ended |
| Architecture | Pipelined (FLASH method per industry listing) |
| Analog Supply Voltage | 3.3 V |
| Digital I/O Supply | 3.3 V (LVTTL/CMOS-compatible outputs) |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Package Type | TQFN-40 (HVQCCN), 6 mm x 6 mm, 0.8 mm height |
| Package Outline | MO-220WJJD-2 |
| Exposed Pad | Yes (must be soldered for thermal/ground) |
| Kiểu lắp đặt | Surface Mount |
| Lead-Free / RoHS | Lead-free, RoHS compliant (per +G3U tape suffix code) |
Cấu hình chân MAX1209ETL+G3U
| Chân 1 | GND — Ground reference (also tied to exposed pad) |
| Chân 2 | AVDD — Analog supply voltage (3.3V nominal) |
| Chân 3 | INP — Positive analog differential input |
| Chân 4 | INN — Negative analog differential input |
| Chân 5 | GND — Ground |
| Chân 6 | AVDD — Analog supply voltage (3.3V nominal) |
| Chân 7 | VCM — Common-mode voltage bypass |
| Chân 8 | REF — Reference voltage decoupling |
| Chân 9 | GND — Ground |
| Chân 10 | CLKP — Sampling clock positive input |
| Chân 11 | CLKN — Sampling clock negative input (or tied to GND for single-ended) |
| Chân 12 | GND — Ground |
| Chân 13 | DRVDD — Digital output supply (3.3V) |
| Chân 14 | D0 — CMOS data output bit 0 (LSB) |
| Chân 15 | D1 — CMOS data output bit 1 |
| Chân 16 | D2 — CMOS data output bit 2 |
| Chân 17 | D3 — CMOS data output bit 3 |
| Chân 18 | D4 — CMOS data output bit 4 |
| Chân 19 | D5 — CMOS data output bit 5 |
| Chân 20 | D6 — CMOS data output bit 6 |
| Chân 21 | D7 — CMOS data output bit 7 |
| Chân 22 | D8 — CMOS data output bit 8 |
| Chân 23 | D9 — CMOS data output bit 9 |
| Chân 24 | D10 — CMOS data output bit 10 |
| Chân 25 | D11 — CMOS data output bit 11 (MSB) |
| Chân 26 | NC — Not connected (per datasheet) |
| Chân 27 | DRVDD — Digital output supply (3.3V) |
| Chân 28 | GND — Ground |
| Chân 29 | NC — Not connected (per datasheet) |
| Chân 30 | GND — Ground |
| Chân 31 | NC — Not connected (per datasheet) |
| Chân 32 | AVDD — Analog supply voltage (3.3V nominal) |
| Chân 33 | NC — Not connected (per datasheet) |
| Chân 34 | GND — Ground |
| Chân 35 | NC — Not connected (per datasheet) |
| Chân 36 | AVDD — Analog supply voltage (3.3V nominal) |
| Chân 37 | NC — Not connected (per datasheet) |
| Chân 38 | GND — Ground |
| Chân 39 | NC — Not connected (per datasheet) |
| Chân 40 | AVDD — Analog supply voltage (3.3V nominal) |
Ứng dụng tiêu biểu
MAX1209ETL+G3U phù hợp cho 6 Áp dụngs: Cellular Base-Station IF Digitizer, Digital Oscilloscope Front End, Cable-Modem Downstream Receiver, Ultrasound Imaging Front End, Radar / Electronic-Warfare IF Receiver, Industrial Test & Measurement Instrumentation.
Cellular Base-Station IF Digitizer
The MAX1209ETL+G3U's 80 Msps sampling rate and wideband track-and-hold input enable direct digitization of IF signals at 35-70 MHz without an additional downconversion mixer, simplifying receiver architecture. Its 12-bit resolution provides sufficient dynamic range for UMTS/LTE IF channel power measurements, and the 3.3V single-supply operation reduces board complexity versus multi-rail ADC solutions. Compared to discrete mixer + baseband ADC chains, placing the MAX1209ETL+G3U directly at the IF stage eliminates analog image-reject filters and lowers total BOM cost.
Được đề xuất
Digital Oscilloscope Front End
The MAX1209ETL+G3U delivers 80 Msps sampling on a single 3.3V supply, which is well suited to mid-tier 100-200 MHz bandwidth digital oscilloscope channels where four or more ADCs are needed per instrument. The wideband differential input accepts the attenuator/amplifier output directly, while 12-bit resolution captures enough vertical resolution for general-purpose measurements. Its TQFN-40 footprint allows dense multi-channel PCB layouts, and the exposed pad simplifies thermal management across multiple ADCs per board.
Được đề xuất
Cable-Modem Downstream Receiver
The MAX1209ETL+G3U's 80 Msps sampling rate is sufficient to digitize downstream QAM channels in cable-modem receivers, where symbol rates plus Nyquist margin must be captured cleanly. The fully differential wideband input handles the modulated RF/IF output of the tuner block directly, and the 12-bit resolution gives adequate margin for downstream demodulation. Using this ADC removes a discrete AGC stage and simplifies the receiver signal chain while preserving the carrier-to-noise ratio required for 256-QAM.
Được đề xuất
Ultrasound Imaging Front End
The MAX1209ETL+G3U's 80 Msps throughput and 12-bit vertical resolution suit ultrasound beamformer front ends, where each transducer channel requires an ADC running near 40-80 Msps to capture the RF echo at sufficient sample rate. The wideband differential input accepts the LNA output directly, and the single 3.3V supply simplifies the channel-board power tree. With multi-channel beamformer boards typically deploying 16-128 ADCs, the small TQFN-40 footprint maximizes channel density per square centimeter.
Được đề xuất
Radar / Electronic-Warfare IF Receiver
The MAX1209ETL+G3U's wideband track-and-hold input supports direct IF sampling of radar and EW receivers at intermediate frequencies up to 70 MHz or more, eliminating a second downconversion stage and its associated image problems. Its 12-bit resolution captures return-signal dynamic range for surveillance and direction-finding applications, and the 3.3V supply makes it compatible with FPGA-based digital signal processing downstream. The exposed-pad TQFN package enables dense board layouts typical in multi-channel EW receiver cards.
Được đề xuất
Industrial Test & Measurement Instrumentation
The MAX1209ETL+G3U is a good fit for industrial data-acquisition modules, spectrum analyzers, and signal analyzers that need 12-bit resolution and 80 Msps throughput. The single 3.3V supply simplifies the analog front-end power design, while the parallel CMOS outputs connect directly to FPGAs for real-time FFT and modulation analysis. The -40C to +85C industrial temperature range supports factory-floor and outdoor deployment where commercial-grade parts would fail.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX1209ETL+G3U — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MAX1209ETL+ | MAX1209ETL+T | MAX1208ETL+ | MAX1207ETL+ |
|---|---|---|---|---|---|
| Brand | Analog Devices (formerly Maxim Integrated) | Analog Devices (same) | Analog Devices (same) | Analog Devices (same family) | Analog Devices (same family) |
| Package | TQFN-40 (HVQCCN) 6x6 mm | TQFN-40 (HVQCCN) 6x6 mm - same | TQFN-40 (HVQCCN) 6x6 mm - same | TQFN-40 (HVQCCN) 6x6 mm - same | TQFN-40 (HVQCCN) 6x6 mm - same |
| Resolution | 12 bits | 12 bits - same | 12 bits - same | 12 bits - same | 12 bits - same |
| Sampling Rate | 80 Msps | 80 Msps - same | 80 Msps - same | 65 Msps (-19%) | 40 Msps (-50%) |
| Supply Voltage | 3.3 V | 3.3 V - same | 3.3 V - same | 3.3 V - same | 3.3 V - same |
| Input Structure | Fully Differential Wideband T/H | Fully Differential Wideband T/H - same | Fully Differential Wideband T/H - same | Fully Differential Wideband T/H - same | Fully Differential Wideband T/H - same |
| Pin-to-Pin Compatible | Yes (reference part) | Yes - same die | Yes - same die | Yes - same package, lower sample rate | Yes - same package, lower sample rate |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same | -40C to +85C - same |
Bảo phân biệt quan trọng
- Highest sample rate in the MAX120x TQFN-40 family (vsMAX1208ETL+)
- 2x sample rate over the entry-level MAX1207ETL+ (vsMAX1207ETL+)
- True 12-bit IF-sampling capability with wideband T/H input (vsMAX1209ETL+ (other suffixes))
Ghi chú thiết kế
Use a solid unbroken analog ground plane and stitch the TQFN exposed pad to that plane with at least 8 thermal vias. Separate the AVDD and DRVDD power islands to prevent digital switching noise from coupling into the analog front end, and place 0.1uF X7R ceramic bypass capacitors within 2 mm of every AVDD/DRVDD pin. Add a 10uF bulk tantalum or ceramic capacitor adjacent to the analog supply input. Route the differential analog input traces (INP/INN) as a matched-length pair on the same layer, with ground-side shielding to reject common-mode noise.
The 80 Msps sampling clock must be sourced from a low-jitter oscillator (jitter below 1 ps RMS) to preserve SNR; every additional picosecond of clock jitter degrades SNR by approximately 0.5 dB at 70 MHz input. Route the clock trace on a different layer from the analog input, using a ground plane between them to minimize crosstalk. If the application requires a single-ended clock, AC-couple and bias CLKN per the datasheet timing diagrams.
Do not skip the input common-mode bias network on INP/INN - the MAX1209ETL+G3U requires the input common-mode voltage to be set within the datasheet-specified range, typically using a resistive divider or a dedicated VCM pin bypass. Driving the inputs outside this range reduces linearity and risks latch-up. Also ensure the exposed pad is soldered; an unsoldered exposed pad raises thermal resistance and degrades the ground-return path, which directly impacts SNR and SFDR.
Matched-length routing of INP/INN is essential - any length mismatch translates directly into a differential skew that the track-and-hold interprets as a phase error. Keep the analog input traces short (less than 25 mm where possible), and avoid routing them parallel to the parallel CMOS data outputs (D0-D11) which can couple switching noise back into the analog front end.
Thông tin tuân thủ
Lead-free and RoHS compliant per Maxim +G3U tape suffix code. REACH, halogen-free, and conflict-minerals declarations are not published in the verified data and are marked unknown.
