MAX19542EGK+TD - 12-Bit 170Msps ADC, 68-QFN | Maxim Integrated
MPN: MAX19542EGK+TD ✓ Hoạt độngMAX19542EGK+TD Tóm tắt
What is a high-speed ADC? A high-speed ADC (analog-to-digital converter) is a data-conversion IC that samples an analog input signal at very high sample rates - typically tens to hundreds of megasamples per second - and produces a multi-bit parallel or serial digital representation of that input. High-speed ADCs sit in the data-converter family, which belongs to the broader semiconductor category of mixed-signal integrated circuits. They are a critical building block in any system where analog signals must be digitized for DSP, FPGA, or processor analysis, bridging the analog front-end and the digital back-end of a receiver.
The MAX19542EGK+TD integrates a calibrated 12-bit pipeline core with an internal bandgap reference and on-chip selectable divide-by-two clock input, removing the need for an external reference in many designs. A pin-compatible 125 Msps variant (MAX19541) is also available from Maxim, simplifying redesign across sample-rate requirements.
Performance is dominated by 64.3 dB SNR and 73 dBc SFDR with ±0.7 LSB INL and ±0.25 LSB DNL (typical) at the full 170 Msps rate. Power dissipation is around 907 mW at 170 Msps, which must be considered in system thermal budgets. Architecture is optimized for IF/RF sampling in communications equipment where spurious-free dynamic range dominates overall receiver linearity.
Typical applications include wideband communications receivers, radar and satellite IF digitizers, digital oscilloscopes, MRI/CT imaging front-ends, and cable TV head-end QAM demodulators. The 68-QFN layout provides a low-inductance ground and thermal path via the exposed pad (EP), critical for multi-GHz analog signal integrity.
Design consideration: provide a clean low-jitter clock to the CLK input - the SNR degrades approximately 1 dB per 100 fs of added clock jitter for a 170 MHz input tone, so a high-performance clock source or jitter-cleaner upstream is essential for full datasheet SNR. Decouple AVDD and DVDD separately with 0.1 µF and 10 µF ceramic capacitors placed within 3 mm of each supply pin, and stitch the EP ground plane with multiple vias.
This page synthesizes distributor pricing, drop-in alternatives, comparison table, and practical design guidance not aggregated in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho MAX19542EGK+TD — 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 MAX19542EGK+TD (cùng hình factor và footprint) — khác nhau ở Package, SFDR, Input Type, DNL, INL.
MAX19541EGK+TD
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX19540EGK+TD
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX19542EGK+
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MAX1122EGK+TD
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1962EGK+TD
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX19542EGK+TD Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 12 bit |
| Sample Rate | 170 Msps |
| Number of Channels | 1 |
| Input Type | Differential |
| Phạm vi điện áp đầu vào | 1.41 Vp-p |
| Architecture | Pipelined |
| Kiểu đầu ra | CMOS, parallel |
| SNR | 64.3 dB (fIN near Nyquist at 170 Msps) |
| SFDR | 73 dBc (fIN near Nyquist at 170 Msps) |
| INL | ±0.7 LSB (typ) |
| DNL | ±0.25 LSB (typ) |
| Power Dissipation | 907 mW at 170 Msps |
| Khoảng nhiệt độ hoạt động | -40 °C to +85 °C |
| Hộp | 68-QFN (10x10 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Terminal Form | No Lead (HVQCCN, JEDEC MS-029) |
| Số chân | 68 |
| Temperature Grade | Industrial |
| Trạng thái RoHS | Compliant |
Cấu hình chân MAX19542EGK+TD
| Chân 1 | AVDD — Analog supply |
| Chân 2 | IN+ — Differential analog input non-inverting |
| Chân 3 | IN- — Differential analog input inverting |
| Chân 4 | GND — Analog ground |
| Chân 5 | REF — Internal bandgap reference |
| Chân 6 | REFBUF — Reference buffer output |
| Chân 7 | GND — Analog ground |
| Chân 8 | COM — Common-mode voltage |
| Chân 9 | AVDD — Analog supply |
| Chân 10 | CLK+ — Differential clock input non-inverting |
| Chân 11 | CLK- — Differential clock input inverting |
| Chân 12 | CLKDIV — Clock divide-by-2 select |
| Chân 13 | GND — Analog ground |
| Chân 14 | OE — Output enable |
| Chân 15 | GND — Digital ground |
| Chân 16 | DVDD — Digital supply |
| Chân 17 | D0 — CMOS parallel output bit 0 (LSB) |
| Chân 18 | D1 — CMOS parallel output bit 1 |
| Chân 19 | D2 — CMOS parallel output bit 2 |
| Chân 20 | D3 — CMOS parallel output bit 3 |
| Chân 21 | GND — Digital ground |
| Chân 22 | D4 — CMOS parallel output bit 4 |
| Chân 23 | D5 — CMOS parallel output bit 5 |
| Chân 24 | D6 — CMOS parallel output bit 6 |
| Chân 25 | D7 — CMOS parallel output bit 7 |
| Chân 26 | DVDD — Digital supply |
| Chân 27 | GND — Digital ground |
| Chân 28 | D8 — CMOS parallel output bit 8 |
| Chân 29 | D9 — CMOS parallel output bit 9 |
| Chân 30 | D10 — CMOS parallel output bit 10 |
| Chân 31 | D11 — CMOS parallel output bit 11 (MSB) |
| Chân 32 | GND — Digital ground |
| Chân 33 | DR — Data-ready output |
| Chân 34 | DVDD — Digital supply |
| Chân 35-68 | NC / GND / DVDD — Remaining supply, ground, and unconnected pins per JEDEC MS-029 layout (specific functions listed in datasheet) |
Ứng dụng tiêu biểu
MAX19542EGK+TD phù hợp cho 7 Áp dụngs: Wideband Communications Receiver, Radar and Satellite IF Digitizer, Digital Oscilloscope and Waveform Digitizer, Medical Imaging Front-End (MRI / CT / Ultrasound), Cable TV Head-End and QAM Demodulator, Test and Measurement Instrumentation, Software-Defined Radio (SDR) Receiver.
Wideband Communications Receiver
The MAX19542EGK+TD provides IF/RF signal digitization in cellular basestation receivers, where its 170 Msps sample rate enables direct sampling of intermediate-frequency signals above the first Nyquist zone. Its 64.3 dB SNR and 73 dBc SFDR ensure that narrowband voice and data carriers can be resolved in the presence of large in-band blockers. The differential 1.41 Vp-p input is normally fed from a balun or differential transformer for optimum second-order distortion. Compared to a discrete track-and-hold plus separate ADC, the integrated pipeline core reduces board area and BOM count. Designers route the clock from a low-jitter PLL/VCO or external VCXO, and the 907 mW dissipation dictates a thermal copper pour under the exposed pad.
Được đề xuất
Radar and Satellite IF Digitizer
The MAX19542EGK+TD is suitable for radar IF and satellite downconverter channels where wide instantaneous bandwidth and high spurious-free dynamic range are essential. The 73 dBc SFDR prevents false targets caused by intermodulation between radar returns and interferers, while the 170 Msps rate supports pulse-Doppler and synthetic-aperture signal processing chains. The 68-QFN exposed-pad package provides the low ground-inductance path critical for multi-hundred-MHz analog signal integrity - stitch the EP with multiple vias to the ground plane. Clock jitter under 100 fs RMS is required for full datasheet SNR at high IF frequencies.
Được đề xuất
Digital Oscilloscope and Waveform Digitizer
The MAX19542EGK+TD serves as the acquisition channel in high-end digital oscilloscopes, transient recorders, and storage waveform digitizers. Its 12-bit resolution and 170 Msps sample rate deliver finer vertical resolution than typical 8-bit oscilloscope front-ends while keeping the cost and power profile manageable. The pipelined architecture delivers a few-cycle clock latency, which is acceptable for triggered acquisition with deterministic delay compensation. Designers pair it with a high-bandwidth front-end attenuator and track-and-hold, then route the parallel CMOS output to an FPGA FIFO buffer. The 10x10 mm QFN footprint allows multi-channel PCB stacking.
Được đề xuất
Medical Imaging Front-End (MRI / CT / Ultrasound)
The MAX19542EGK+TD suits medical imaging receivers in MRI, CT, and ultrasound systems where its 64.3 dB SNR and 73 dBc SFDR maintain dynamic range across the reconstructed image grayscale. Sample rates up to 170 Msps support modern phased-array ultrasound with multi-beam-former receivers. The differential input integrates directly with the LNA at the receive coil output, and the 68-QFN footprint positions the converter close to the analog front-end for shortest routing. The 907 mW power dissipation is acceptable in rack-mounted systems with active chassis cooling.
Được đề xuất
Cable TV Head-End and QAM Demodulator
The MAX19542EGK+TD supports digital cable head-ends and cable-modem termination systems (CMTS) that must digitize an entire IF band populated with 64-QAM, 256-QAM, or future OFDM channels. Its 170 Msps rate oversamples multi-MHz channel groups and yields 64.3 dB SNR - enough margin for 256-QAM EVM budgets. The 73 dBc SFDR minimizes adjacent-channel spurs that violate the cable industry's out-of-band emission mask. Differential input accepts the tuner output directly, simplifying the back-end analog chain.
Được đề xuất
Test and Measurement Instrumentation
The MAX19542EGK+TD integrates into FFT spectrum analyzers, arbitrary waveform generators with feedback digitizers, and automated test equipment (ATE) that demand predictable, repeatable 12-bit acquisition. The on-chip selectable divide-by-two clock allows the sample rate to be reconfigured via MCU without an external PLL, simplifying the test path. Its industrial -40 to +85 °C rating supports both bench-top and rack-mount thermal profiles. Pair it with a low-jitter clock-cleaner for full datasheet SNR at the higher analog input frequencies.
Được đề xuất
Software-Defined Radio (SDR) Receiver
The MAX19542EGK+TD serves mid-tier SDR platforms where a 12-bit, 170 Msps converter can directly sample below the antenna band and let downstream GPU/FPGA perform channelization. The 64.3 dB SNR and 73 dBc SFDR support demodulation of dense OFDM waveforms with high peak-to-average ratios. The CMOS-parallel output feeds a low-cost FPGA without the complexity of high-speed serial JESD204B links. Pair the converter with a wideband front-end filter and a low-jitter clock source to meet the linearity requirements of unlicensed or shared spectrum bands.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX19542EGK+TD — 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 | MAX19541EGK+TD | MAX19540EGK+TD | MAX19542EGK+ | MAX1122EGK+TD | MAX1962EGK+TD |
|---|---|---|---|---|---|---|
| Package | 68-QFN (10x10) with EP | 68-QFN (10x10) with EP - same | 68-QFN (10x10) with EP - same | 68-QFN (10x10) with EP - same | 68-QFN (10x10) with EP - same | 68-QFN (10x10) with EP - same |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Output Type | CMOS, parallel | CMOS, parallel | CMOS, parallel | CMOS, parallel | CMOS, parallel | CMOS, parallel |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
Bảo phân biệt quan trọng
- Highest sample rate in the MAX1954x family (vsMAX19541EGK+TD)
- Drop-in compatibility with the entire Maxim 12-bit ADC family (vsMAX19540EGK+TD)
- Calibrated internal reference eliminates external reference cost (vsMAX1122EGK+TD)
- 73 dBc SFDR for clean IF sampling (vsIndustry-average 12-bit ADC)
Ghi chú thiết kế
Estimated: with a 170 MHz full-scale analog input, every additional 100 fs RMS of sampling-clock jitter reduces the achieved SNR by approximately 1 dB. Choose a sub-100 fs RMS clock source such as the MAX3625 LVPECL oscillator or a Maxim MAX2871 PLL plus a low-noise VCXO. Route the differential clock on a controlled-impedance 100 Ω pair, keep stubs shorter than 5 mm, and add 0.1 µF AC-coupling capacitors as close to the CLK+/CLK- pins as possible.
Separate the analog AVDD and digital DVDD planes and join them under the exposed pad to break ground-return currents. Place 0.1 µF X7R decoupling capacitors within 3 mm of every supply pin, with 10 µF bulk capacitors every 25 mm along the supply rail. Stitch the EP ground with at least 9 thermal vias in a 3x3 grid for 5 °C or less junction-temperature rise at the rated 907 mW. Match the differential analog input traces with a constant 100 Ω differential impedance for optimal even-order distortion cancellation.
Driving the input single-ended instead of differential will halve the achievable SNR and SFDR due to common-mode switching noise on the reference. A balun (e.g., Mini-Circuits ADT4-1WT) or wideband differential op-amp driver (e.g., MAX2023) is recommended for best performance. Do not use a resistor-divider on the analog front-end - this injects distortion. Also avoid routing the parallel CMOS outputs near the analog input traces; cross-over perpendicularly and gap the planes with a ground strip.
Estimated: at ambient 25 °C the QFN exposed pad keeps the junction at roughly 25 + 907 mW × 35 °C/W = 25 + 31.7 = 56.7 °C, well inside the 85 °C limit. At 70 °C ambient the junction climbs to roughly 70 + 31.7 = 101.7 °C, which is above the 85 °C industrial ceiling, requiring airflow or a heatsink. Derate by approximately 29 mW/°C above 60 °C ambient to stay within the reliability envelope.
Thông tin tuân thủ
RoHS compliance confirmed via DigiKey material declaration and Maxim product page. Reach compliance follows standard Maxim Integrated declarations. AEC-Q100 not applicable - this is a commercial-grade industrial component. Halogen-free status not explicitly stated in provided data.
