MAX1428ETN+TD - 15-Bit 80Msps IF ADC | Maxim Integrated
MPN: MAX1428ETN+TD ✓ פעילMAX1428ETN+TD סקירה
An ADC is a mixed-signal data converter that samples a continuous analog input voltage and quantizes it into a discrete digital code at a defined sample rate. High-speed pipeline ADCs such as the MAX1428 sit in the hierarchy of analog-to-digital converters -> data converters -> mixed-signal ICs -> semiconductors. The MAX1428 specifically targets the IF-sampling use case where a wideband analog signal at tens to hundreds of MHz must be captured directly, eliminating a second down-conversion stage in the receiver chain.
Key performance figures include a guaranteed 80 Msps minimum sample rate, 73.9 dB SNR at fIN = 70 MHz and AIN = -2 dBFS, 83 dBc/91 dBc single-tone SFDR1/SFDR2 at the same input, -82 dB multitone SFDR for two tones at 69 MHz and 71 MHz, and exceptional aperture jitter below 0.25 ps that preserves dynamic performance at high analog input frequencies. The converter's noise floor of -78.4 dBFS gives the receiver chain enough dynamic range for sensitive demodulation.
Architecturally, the part uses a pipelined multi-stage converter core with proprietary digital error correction, an internal bandgap reference, and a fully differential analog input path that improves common-mode rejection and harmonic performance. The +TD tape-and-reel packaging supports automated pick-and-place on high-density RF/IF receiver boards.
Typical end uses include cellular base-station IF digitizers, software-defined radio receivers, broadband cable head-end equipment, spectrum analyzer acquisition channels, and medical ultrasound beamformers. Anywhere an analog signal in the 50 MHz to 200 MHz band needs direct digitization with high spurious-free dynamic range, the MAX1428 is a viable candidate.
When designing with the MAX1428, supply a low-noise analog front-end to preserve the part's dynamic range; the 0.25 ps aperture jitter spec will only deliver the rated SNR if the input driver keeps the right ADC cleaner than the ADC's own internal noise. Decouple AVDD and DVDD with separate 0.1 uF ceramic capacitors placed as close to the pins as possible.
This page synthesizes distributor pricing, parametric drop-in equivalents, and dynamic-performance design notes that go beyond the headline numbers in the manufacturer datasheet.
חלופות תחליף ישיר עבור MAX1428ETN+TD — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם MAX1428ETN+TD (אותו גורם צורה וטביעת רגל) — שונים ב Architecture, Noise Floor, Terminal Form.
MAX1428ETN+D
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MAX1427ETN+TD
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MAX1418ETN+TD
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MAX1430ETN+TD
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MAX1428ETN+TD דירוגים מרביים ומאפיינים חשמליים
| רזולוציה | 15 bit |
| Sample Rate (Minimum) | 80 Msps |
| Architecture | Pipelined ADC |
| Noise Floor | -78.4 dBFS |
| SNR at fIN = 70 MHz, AIN = -2 dBFS | 73.9 dB |
| Single-Tone SFDR1 at fIN = 70 MHz | 83 dBc |
| Single-Tone SFDR2 at fIN = 70 MHz | 91 dBc |
| Multitone SFDR (fIN = 69/71 MHz) | -82 dB |
| Aperture Jitter | < 0.25 ps |
| Number of Terminals | 56 |
| Terminal Form | No Lead (HVQCCN) |
| Package Code | HVQCCN |
| Package Shape | Square |
| Temperature Grade | Industrial |
| Packaging | Tape & Reel (+TD suffix) |
| Target Application | IF Sampling / Wideband Digitization |
תצורת פינים של MAX1428ETN+TD
| פין 1 | AVDD — Analog supply voltage |
| פין 2 | IN+ — Differential analog input (positive) |
| פין 3 | IN- — Differential analog input (negative) |
| פין 4 | CM — Common-mode voltage bypass |
| פין 5 | REFP — Positive reference decoupling |
| פין 6 | REFN — Negative reference decoupling |
| פין 7 | GND — Analog ground |
| פין 8 | NC — Not connected (per datasheet) |
| פין 9 | CLK — Clock input |
| פין 10 | CLKB — Complementary clock input |
| פין 11 | AVDD — Analog supply voltage |
| פין 12 | DVDD — Digital supply voltage |
| פין 13 | DGND — Digital ground |
| פין 14 | D0-P — LVDS digital output bit 0 (positive) |
| פין 15 | D0-N — LVDS digital output bit 0 (negative) |
| פין 16 | D1-P — LVDS digital output bit 1 (positive) |
| פין 17 | D1-N — LVDS digital output bit 1 (negative) |
| פין 18 | D2-P — LVDS digital output bit 2 (positive) |
| פין 19 | D2-N — LVDS digital output bit 2 (negative) |
| פין 20 | D3-P — LVDS digital output bit 3 (positive) |
| פין 21 | D3-N — LVDS digital output bit 3 (negative) |
| פין 22 | D4-P — LVDS digital output bit 4 (positive) |
| פין 23 | D4-N — LVDS digital output bit 4 (negative) |
| פין 24 | D5-P — LVDS digital output bit 5 (positive) |
| פין 25 | D5-N — LVDS digital output bit 5 (negative) |
| פין 26 | D6-P — LVDS digital output bit 6 (positive) |
| פין 27 | D6-N — LVDS digital output bit 6 (negative) |
| פין 28 | D7-P — LVDS digital output bit 7 (positive) |
| פין 29 | D7-N — LVDS digital output bit 7 (negative) |
| פין 30 | D8-P — LVDS digital output bit 8 (positive) |
| פין 31 | D8-N — LVDS digital output bit 8 (negative) |
| פין 32 | D9-P — LVDS digital output bit 9 (positive) |
| פין 33 | D9-N — LVDS digital output bit 9 (negative) |
| פין 34 | D10-P — LVDS digital output bit 10 (positive) |
| פין 35 | D10-N — LVDS digital output bit 10 (negative) |
| פין 36 | D11-P — LVDS digital output bit 11 (positive) |
| פין 37 | D11-N — LVDS digital output bit 11 (negative) |
| פין 38 | D12-P — LVDS digital output bit 12 (positive) |
| פין 39 | D12-N — LVDS digital output bit 12 (negative) |
| פין 40 | D13-P — LVDS digital output bit 13 (positive) |
| פין 41 | D13-N — LVDS digital output bit 13 (negative) |
| פין 42 | D14-P — LVDS digital output bit 14 (positive) |
| פין 43 | D14-N — LVDS digital output bit 14 (negative) |
| פין 44 | OVR-P — LVDS out-of-range flag (positive) |
| פין 45 | OVR-N — LVDS out-of-range flag (negative) |
| פין 46 | DCO-P — LVDS data clock output (positive) |
| פין 47 | DCO-N — LVDS data clock output (negative) |
| פין 48 | FCO-P — LVDS frame clock output (positive) |
| פין 49 | FCO-N — LVDS frame clock output (negative) |
| פין 50 | AVDD — Analog supply voltage |
| פין 51 | GND — Analog ground |
| פין 52 | REFIN — External reference input |
| פין 53 | REFOUT — Internal reference output |
| פין 54 | PD — Power-down control |
| פין 55 | MODE — Output mode / test configuration |
| פין 56 | EP — Exposed thermal pad (connect to GND) |
יישומים טיפוסיים
MAX1428ETN+TD מתאים עבור 6 יישוםs: Cellular Base-Station IF Digitization, Software-Defined Radio Receivers, Broadband Cable Head-End Equipment, Spectrum Analyzer Acquisition Channel, Medical Ultrasound Beamformer Receivers, Industrial Radar and Lidar Digitization.
Cellular Base-Station IF Digitization
The MAX1428ETN+TD is well matched to direct IF sampling in cellular base-station receivers, where the antenna chain converts RF to an intermediate frequency and the MAX1428's -78.4 dBFS noise floor plus 73.9 dB SNR at 70 MHz cleanly capture the modulation bandwidth. Its 0.25 ps aperture jitter preserves SNR even at high IF frequencies, allowing elimination of a second down-conversion stage and reducing overall BOM. Place the part after the final IF SAW filter with a low-noise ADC driver; the wideband analog input rejects in-band interferers and the digital outputs stream into an FPGA for downstream demodulation.
מומלץ
Software-Defined Radio Receivers
Software-defined radio (SDR) platforms benefit from the MAX1428ETN+TD's 80 Msps sample rate combined with -78.4 dBFS noise floor, which lets the SDR capture tens of MHz of spectrum bandwidth at once and down-convert in software. The 83 dBc SFDR1 and 91 dBc SFDR2 at 70 MHz input ensure spurious responses stay below the noise floor of typical SDR demodulators, while the 56-pin HVQCCN package keeps the analog front-end compact for embedded or portable SDR modules. The wideband digital outputs map to standard LVDS interfaces used in modern FPGA-based SDR boards.
מומלץ
Broadband Cable Head-End Equipment
In cable head-end and distribution infrastructure, the MAX1428ETN+TD digitizes wideband downstream signals after the IF stage, where the -78.4 dBFS noise floor is critical for low bit-error-rate demodulation of dense QAM constellations. Its 73.9 dB SNR at 70 MHz input directly translates to higher modulation-order support and improved channel capacity per port. Use the part with a low-noise IF amplifier and anti-alias filter; the wide input bandwidth preserves modulation fidelity and the LVDS digital outputs interface to downstream FPGAs.
מומלץ
Spectrum Analyzer Acquisition Channel
Test and measurement spectrum analyzers require wideband, high-SFDR digitizers, and the MAX1428ETN+TD delivers 83 dBc/91 dBc single-tone SFDR and 0.25 ps aperture jitter for accurate IF analysis. With -78.4 dBFS noise floor and 73.9 dB SNR at 70 MHz, the part reliably captures weak signals adjacent to strong tones - the classic spectrum analyzer dynamic-range requirement. The HVQCCN-56 package suits dense analyzer front-end boards, while LVDS digital outputs ease timing closure on the FPGA capture stage.
מומלץ
Medical Ultrasound Beamformer Receivers
Medical ultrasound systems use IF-sampling ADCs to digitize time-gain-compensated echo signals, and the MAX1428ETN+TD's 80 Msps rate plus 73.9 dB SNR support the wide dynamic range required for harmonic imaging. The -78.4 dBFS noise floor lets the beamformer preserve subtle echoes that distinguish tissue types, while 0.25 ps aperture jitter keeps the time-of-arrival accuracy needed for fine beam-steering. The HVQCCN-56 package fits into the compact channel boards used in multi-element ultrasound probes.
מומלץ
Industrial Radar and Lidar Digitization
Industrial FMCW radar and Lidar systems use the MAX1428ETN+TD to digitize IF signals from the radar mixer chain, where the 0.25 ps aperture jitter preserves range resolution and the -78.4 dBFS noise floor enables detection of weak returns. The 80 Msps sample rate captures chirp bandwidths used in sub-meter industrial ranging, and 73.9 dB SNR at 70 MHz input preserves object-plane accuracy. The compact HVQCCN-56 package supports high-density channel cards typical of phased-array industrial radar front-ends.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור MAX1428ETN+TD — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | MAX1428ETN+D | MAX1427ETN+TD | MAX1418ETN+TD | MAX1430ETN+TD |
|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | HVQCCN-56 (TQFN-style) | HVQCCN-56 - same | HVQCCN-56 - same | HVQCCN-56 - same | HVQCCN-56 - same |
| Temperature Grade | Industrial | Industrial | Industrial | Industrial | Industrial |
| Packaging Form | Tape & Reel (+TD) | Tray (+D) | Tape & Reel (+TD) | Tape & Reel (+TD) | Tape & Reel (+TD) |
מבדילים עיקריים
- Highest dynamic range in the 15-bit 80 Msps Maxim ADC family (לעומתMAX1427ETN+TD)
- Sub-picosecond aperture jitter preserves SNR at high IF (לעומתMAX1418ETN+TD)
- Compact HVQCCN-56 package for dense IF receiver boards (לעומתMAX1430ETN+TD)
הערות תכנון
Preserve SNR at IF frequencies by using an ADC driver with sub-ps jitter and keeping clock traces length-matched with controlled impedance. The MAX1428ETN+TD's 0.25 ps aperture jitter can only deliver the rated 73.9 dB SNR at 70 MHz if the analog front-end and clock path do not add jitter of their own. Recommended: use a low-jitter clock source such as a VCXO or dedicated clock generator and route CLK/CLKB as a 100 ohm differential pair.
Decouple AVDD and DVDD with separate 0.1 uF ceramic capacitors placed as close to the supply pins as possible. Add a 10 uF bulk capacitor on each rail. The MAX1428ETN+TD's -78.4 dBFS noise floor is only achievable when the analog supply is clean; a switching regulator on AVDD will degrade SNR measurably. Use an LDO or low-noise linear regulator for the AVDD rail.
Route the LVDS output pairs (D0..D14, OVR, DCO, FCO) as length-matched 100 ohm differential pairs to minimize skew. Keep the analog input traces short and symmetric around the differential pair IN+/IN- to preserve the 83 dBc/91 dBc SFDR. Connect the exposed pad (pin 56) to a clean analog ground plane to keep junction temperature within the industrial range.
Do not route digital outputs beneath the analog input traces on adjacent layers - coupling from the LVDS edges will degrade SFDR. Do not share the same ferrite between AVDD and DVDD; the noise on the digital rail will couple into the analog input through the ferrout. Do not exceed the AVDD absolute-maximum voltage (per datasheet) - the input protection will not survive transients beyond the rated limit.
מידע על תאימות
RoHS and REACH compliant per Maxim Integrated / Analog Devices product page. Not AEC-Q100 qualified - industrial temperature grade only.
