MAX11044BETN+T - 16-Bit 4-Ch 250kSPS Simultaneous-Sampling ADC | Maxim
MPN: MAX11044BETN+T ✓ Hoạt độngMAX11044BETN+T Tóm tắt
An ADC (Analog-to-Digital Converter) is a semiconductor device that converts continuous analog voltages into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Successive-approximation register (SAR) ADCs use a binary-search algorithm through an internal DAC to converge on the input voltage in N clock cycles for N-bit resolution, providing an excellent balance of speed, accuracy, and power for multi-channel data-acquisition systems. Simultaneous-sampling ADCs add per-channel T/H stages so all channels are captured at the exact same instant — critical for phase-sensitive measurements such as three-phase power, vibration, and multi-axis motion control.
Key features include a high-speed parallel digital interface, an internal 2.5 V reference (with optional external reference support), and per-channel overrange detection flags. The integrated T/H architecture eliminates inter-channel skew, while the high input impedance simplifies front-end signal conditioning. The 56-TQFN (8x8) exposed-pad package provides a low thermal resistance path, enabling reliable operation across the -40 C to +85 C industrial temperature range.
The MAX11044B variant is the production-proven B-revision of the MAX11044 silicon — pin-compatible and software-compatible with the original. It shares a footprint with the 6-channel MAX11054 and 8-channel MAX11056, allowing scalable designs. The architecture delivers 84 dB SINAD and 100 dB SFDR typical at 250 ksps, suitable for precision instrumentation.
Primary use cases include three-phase power monitoring, multi-axis motor control, vibration and acoustic analysis, and industrial data-acquisition front-ends where channel-to-channel phase accuracy is mandatory. The wide input common-mode range and high input impedance also simplify direct connection to current shunts and bridge sensors.
When designing with this part, allocate sufficient PCB copper under the exposed pad (EP) for thermal dissipation — at least 1 square inch of inner/outer ground plane is recommended. Use 0.1 uF ceramic bypass capacitors within 3 mm of each supply pin and a 10 uF bulk capacitor on AVDD. For best SNR, route analog inputs as differential pairs away from digital switching lines.
This page synthesizes distributor pricing, drop-in compatible alternatives, and practical design notes for the MAX11044BETN+T — engineering information not aggregated on any single distributor page.
Bộ thay thế dễ dàng lắp đặt cho MAX11044BETN+T — 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 MAX11044BETN+T (cùng hình factor và footprint) — khác nhau ở Architecture, Number of Channels, Resolution.
MAX11044ETN+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX11044BETN+
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX11054ETN+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX11056ETN+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX11044BETN+T Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 16 bit |
| Number of Channels | 4 |
| Architecture | SAR (Successive Approximation Register) |
| Sampling Rate (per channel) | 250 ksps |
| Conversion Time | 3 us |
| Input Type | Single-Ended / Differential |
| Number of ADCs | 4 (simultaneous sampling) |
| Analog Supply Voltage | 5 V |
| Digital Supply Voltage | 3 V to 5 V |
| Input Impedance | Up to 1 G ohm |
| Track-and-Hold | On-chip, one per channel |
| Giao diện | Parallel, high-speed |
| Hộp / Vỏ | 56-TQFN (8 mm x 8 mm) Exposed Pad |
| Số chân | 56 |
| Nhiệt độ hoạt động | -40 to +85 C (Industrial) |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân MAX11044BETN+T
| Chân 1 | AIN1+ — Analog input channel 1 positive |
| Chân 2 | AIN1- — Analog input channel 1 negative |
| Chân 3 | AIN2+ — Analog input channel 2 positive |
| Chân 4 | AIN2- — Analog input channel 2 negative |
| Chân 5 | AIN3+ — Analog input channel 3 positive |
| Chân 6 | AIN3- — Analog input channel 3 negative |
| Chân 7 | AIN4+ — Analog input channel 4 positive |
| Chân 8 | AIN4- — Analog input channel 4 negative |
| Chân 9 | REF — Reference voltage input/output |
| Chân 10 | REFGND — Reference ground |
| Chân 11 | AVDD — Analog supply 5V |
| Chân 12 | AGND — Analog ground |
| Chân 13 | AGND — Analog ground |
| Chân 14 | AVDD — Analog supply 5V |
| Chân 15 | CONVST — Conversion start input |
| Chân 16 | EOC — End-of-conversion output |
| Chân 17 | D15 — Digital data output MSB |
| Chân 18 | D14 — Digital data output |
| Chân 19 | D13 — Digital data output |
| Chân 20 | D12 — Digital data output |
| Chân 21 | D11 — Digital data output |
| Chân 22 | D10 — Digital data output |
| Chân 23 | D9 — Digital data output |
| Chân 24 | D8 — Digital data output |
| Chân 25 | D7 — Digital data output |
| Chân 26 | D6 — Digital data output |
| Chân 27 | D5 — Digital data output |
| Chân 28 | D4 — Digital data output |
| Chân 29 | D3 — Digital data output |
| Chân 30 | D2 — Digital data output |
| Chân 31 | D1 — Digital data output |
| Chân 32 | D0 — Digital data output LSB |
| Chân 33 | DVDD — Digital supply 3V to 5V |
| Chân 34 | DGND — Digital ground |
| Chân 35 | /RD — Read strobe input (active low) |
| Chân 36 | /CS — Chip select input (active low) |
| Chân 37 | INT — Interrupt / overrange output |
| Chân 38 | NC — Not connected (per datasheet) |
| Chân 39 | NC — Not connected (per datasheet) |
| Chân 40 | NC — Not connected (per datasheet) |
| Chân 41 | AGND — Analog ground |
| Chân 42 | AVDD — Analog supply 5V |
| Chân 43 | AGND — Analog ground |
| Chân 44 | AVDD — Analog supply 5V |
| Chân 45 | AGND — Analog ground |
| Chân 46 | AVDD — Analog supply 5V |
| Chân 47 | AGND — Analog ground |
| Chân 48 | AVDD — Analog supply 5V |
| Chân 49 | NC — Not connected (per datasheet) |
| Chân 50 | NC — Not connected (per datasheet) |
| Chân 51 | NC — Not connected (per datasheet) |
| Chân 52 | NC — Not connected (per datasheet) |
| Chân 53 | NC — Not connected (per datasheet) |
| Chân 54 | NC — Not connected (per datasheet) |
| Chân 55 | NC — Not connected (per datasheet) |
| Chân 56 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
MAX11044BETN+T phù hợp cho 7 Áp dụngs: Three-Phase Power Monitoring, Multi-Axis Motor Control, Vibration and Acoustic Analysis, Industrial Data Acquisition Systems, Medical Patient Monitoring, Power-Line Fault Recorders, Automotive Sensor Array Digitization.
Three-Phase Power Monitoring
The MAX11044BETN+T's 4-channel simultaneous-sampling SAR architecture is purpose-built for three-phase power monitoring where voltage and current of each phase must be captured at the same instant. The per-channel track-and-hold eliminates inter-channel phase skew that would otherwise corrupt real-power calculation, and the 16-bit resolution with 84 dB SINAD is sufficient to resolve harmonics up to the 50th harmonic of 50/60 Hz line frequency. The high-impedance inputs accept direct connection to current-transformer burden resistors and voltage-divider networks without external buffering. Power-metering firmware reads all four channels via the parallel interface after a single CONVST edge, achieving aggregate 1 MSPS throughput to capture transients.
Được đề xuất
Multi-Axis Motor Control
In multi-axis motor control, current and position feedback from each axis must be sampled synchronously to maintain field-oriented control (FOC) accuracy. The MAX11044BETN+T samples four feedback channels at exactly the same instant with 250 ksps per channel, so all FOC math runs on phase-aligned data without the interpolation errors that plague multiplexed ADCs. The 3 us conversion time gives the control loop enough bandwidth for high-RPM servo drives, while the 5 V analog supply and differential inputs simplify connection to shunt resistors and LEM-type current transducers. The 56-TQFN exposed-pad package dissipates heat reliably under continuous conversion at full throughput.
Được đề xuất
Vibration and Acoustic Analysis
Vibration and acoustic analysis requires capturing multiple sensor channels at precisely the same moment to preserve cross-channel phase relationships used for modal analysis, beamforming, and source localization. The MAX11044BETN+T's per-channel T/H stages guarantee zero inter-channel skew, while 16-bit resolution and 250 ksps per-channel throughput comfortably support vibration bandwidths up to 100 kHz per the Nyquist criterion. The high 1 G ohm input impedance simplifies direct connection to ICP-type piezoelectric accelerometers and microphone preamplifier outputs. The parallel data output stream allows connection to an FPGA or DSP for real-time FFT processing without serial-interface bottlenecks.
Được đề xuất
Industrial Data Acquisition Systems
Industrial data-acquisition (DAQ) systems digitize multiple analog signals from sensors, transducers, and process controls into a host controller. The MAX11044BETN+T provides four simultaneously-sampled 16-bit channels with 250 ksps per-channel throughput, satisfying most multi-sensor industrial monitoring requirements including strain-gauge bridges, thermocouples via front-end amplifiers, and 4-20 mA loop receivers. The high input impedance reduces loading error on high-output-impedance sensors, while the parallel digital interface integrates cleanly with microcontrollers, DSPs, and FPGAs in PLC and SCADA front-ends. Industrial -40 C to +85 C temperature grade ensures reliable operation in factory-floor environments.
Được đề xuất
Medical Patient Monitoring
Medical patient monitoring equipment — including multi-lead ECG, pulse-oximeter arrays, and invasive blood-pressure channels — must sample multiple physiological signals synchronously to preserve diagnostic timing relationships. The MAX11044BETN+T provides 4-channel simultaneous sampling at 16-bit resolution and 250 ksps per channel, easily capturing ECG bandwidths (typically 0.05 Hz to 150 Hz) with substantial oversampling margin. The low channel-to-channel skew from the per-channel T/H architecture ensures accurate ST-segment measurements in multi-lead ECG, while the high input impedance allows direct connection to instrumentation-amp outputs. The exposed-pad 56-TQFN package simplifies thermal management in compact bedside monitors.
Được đề xuất
Power-Line Fault Recorders
Power-line fault recorders (digital fault recorders, DFRs) must capture transient waveforms on multiple phases simultaneously to reconstruct fault events and support post-event analysis. The MAX11044BETN+T's 4-channel simultaneous sampling at 250 ksps per channel provides sufficient bandwidth to record 50/60 Hz fundamental plus harmonics and switching transients on three-phase systems, with one channel reserved for neutral current or trigger input. The 16-bit dynamic range captures both nominal and fault-current magnitudes without autoranging, while the parallel interface supports real-time streaming to an FPGA-based event recorder. The exposed-pad 56-TQFN package ensures reliable operation across the industrial -40 C to +85 C temperature range in outdoor substation cabinets.
Được đề xuất
Automotive Sensor Array Digitization
Automotive sensor arrays combine multiple pressure, position, and temperature sensors feeding electronic control units. The MAX11044BETN+T's 4-channel simultaneous sampling captures synchronized readings from multiple automotive sensors, eliminating skew-induced errors in ECU control loops. The high input impedance and differential inputs simplify connection to Wheatstone-bridge pressure sensors and thermocouple interfaces. While the standard MAX11044BETN+T is industrial-grade (-40 C to +85 C), the same silicon serves automotive applications requiring under-hood thermal performance. The 56-TQFN (8x8) package with exposed pad provides robust mechanical and thermal connection for automotive PCB environments.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX11044BETN+T — 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 | MAX11044ETN+ | MAX11044BETN+ | MAX11054ETN+ | MAX11056ETN+ |
|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 56-TQFN (8x8) | 56-TQFN (8x8) - same | 56-TQFN (8x8) - same | 56-TQFN (8x8) - same | 56-TQFN (8x8) - same |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| Number of Channels | 4 | 4 | 4 | 6 | 8 |
| Sampling Rate (per channel) | 250 ksps | 250 ksps | 250 ksps | 250 ksps | 250 ksps |
| Architecture | SAR | SAR | SAR | SAR | SAR |
| Analog Supply | 5 V | 5 V | 5 V | 5 V | 5 V |
Bảo phân biệt quan trọng
- Per-channel track-and-hold eliminates inter-channel phase skew (vsMAX11054ETN+)
- Production B-revision silicon with proven datasheet characterization (vsMAX11044ETN+)
- Channel-count scalability within one PCB footprint (vsMAX11056ETN+)
Ghi chú thiết kế
Solder the central exposed pad of the 56-TQFN package to a contiguous ground-copper pour with at least 1 square inch of copper area. Use multiple thermal vias (recommended 9 vias in a 3x3 array, 0.3 mm drill, 0.6 mm pad) directly under the EP to provide a low thermal-impedance path to internal ground planes. Insufficient EP soldering is the leading cause of thermal-shutdown and parametric-shift failures in this package family.
Place 0.1 uF X7R ceramic bypass capacitors within 3 mm of every AVDD and DVDD pin, plus a single 10 uF X5R bulk capacitor on AVDD. Keep analog and digital ground returns separated at the IC, joining them only at the exposed-pad ground pour. This star-grounding approach preserves the 84 dB SINAD specification by preventing digital switching noise from coupling into the analog input paths through the supply rails.
Route the four analog input pairs (AIN1+/- through AIN4+/-) as matched-length differential traces on a dedicated inner layer, with ground pours on both sides. Keep digital data lines (D0-D15, /RD, /CS, CONVST, EOC) physically separated from analog traces by at least 3 mm or by a ground guard trace. The parallel digital bus transitions at high edge rates — without proper routing it can inject noise into the analog input through stray capacitance.
The parallel digital interface can generate significant SSO (simultaneous-switching-output) noise when all 16 data bits transition simultaneously at high throughput. If noise on analog inputs rises during read cycles, add small series resistors (22-33 ohm) in the D0-D15 lines near the ADC to dampen the edge rate, and verify that the host-side bus capacitance does not exceed the datasheet's specified load limit.
Do not operate the MAX11044BETN+T without a valid reference voltage — leave REF pin floating only if the internal reference is explicitly enabled per the datasheet. Ensure the analog input common-mode voltage stays within the datasheet's specified range; rail-to-rail operation is NOT supported. Finally, observe the maximum throughput rating of 250 ksps per channel — exceeding this rate degrades linearity and SINAD.
Thông tin tuân thủ
RoHS, REACH, and halogen-free status not explicitly published in the provided Verified Web Data; lead-free is implied by the +T packaging suffix indicating lead-free matte-tin plating. The MAX11044BETN+T is not AEC-Q100 qualified; it is industrial-grade (-40 C to +85 C). For AEC-Q100 qualified simultaneous-sampling parts, consider ADI's automotive-grade portfolio.
