MAX11044BETN+ - 16-Bit 4-Ch 250ksps Simultaneous-Sampling SAR ADC | Maxim Integrated
MPN: MAX11044BETN+ ✓ Hoạt độngMAX11044BETN+ Tóm tắt
A successive-approximation-register ADC is a precision data converter that converts an analog input voltage into a digital code using a binary-search algorithm with an internal precision DAC and comparator. Simultaneous-sampling ADCs (often called "sim-samp ADCs") are a specific sub-class in which every channel captures the input at the same instant via per-channel T/H stages, then performs the conversion sequentially. This makes them indispensable for multi-phase power, vibration, and motor-control systems where the phase relationship between channels carries critical information that a multiplexed ADC would smear across time.
Key features include ±5V true bipolar input range, 250 ksps per channel simultaneous sampling, 16-bit resolution with no missing codes, a 2.7V-5.25V digital supply and 5V analog supply, an internal 4.096V reference, and per-channel ±20V input protection. The SAR architecture delivers deterministic latency and excellent DC accuracy, supporting demanding multi-channel measurement tasks.
Typical applications include three-phase power-quality and power-monitoring systems, multi-axis motor control, vibration and modal analysis, industrial process control, and multi-channel data-acquisition (DAQ) front ends. The wide bipolar input range lets engineers connect directly to current-sensing shunts, position encoders, and bridge-pressure sensors without front-end signal conditioning.
When designing with this device, provide clean low-impedance analog and digital supplies and use a solid ground plane under the TQFN exposed pad for thermal dissipation. The simultaneous-sampling architecture is the primary reason to choose this part over a generic multiplexed ADC - if phase coherence between channels matters, no multiplexing ADC will suffice.
This page synthesizes distributor stock and pricing, drop-in alternatives in the same 56-TQFN footprint, and practical design notes that go beyond what the manufacturer datasheet alone provides.
Bộ thay thế dễ dàng lắp đặt cho MAX11044BETN+ — 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+ (cùng hình factor và footprint) — khác nhau ở Architecture, Number of Channels, Resolution.
MAX11045BETN+
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MAX11044ETN+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX11046BETN+
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MAX11040BETN+
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MAX11044BETN+T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX11044BETN+ Tỷ lệ tối đa & tính chất điện
| Manufacturer | Analog Devices Inc. / Maxim Integrated |
| Part Number | MAX11044BETN+ |
| Converter Type | SAR (Successive Approximation Register) ADC |
| Độ phân giải | 16-bit |
| Number of Channels | 4 (simultaneous sampling) |
| Tỷ lệ lấy mẫu | 250 ksps per channel |
| Phạm vi điện áp đầu vào | ±5 V (true bipolar, per channel) |
| Input Protection | ±20 V per channel |
| Analog Supply Voltage (AVDD) | 5 V |
| Digital Supply Voltage (DVDD) | 2.7 V to 5.25 V |
| Internal Reference Voltage | 4.096 V |
| Architecture | Independent T/H + SAR per channel, true simultaneous sampling |
| Hộp | 56-pin TQFN (8x8 mm) |
| Kiểu lắp đặt | Surface Mount |
| Khoảng nhiệt độ hoạt động | -40 C to +85 C (industrial, per E variants) |
| Trạng thái RoHS | Compliant |
Cấu hình chân MAX11044BETN+
| Chân 1 | AVDD — +5V analog supply |
| Chân 2 | GND — Ground (analog/digital common) |
| Chân 3 | REF — Internal 4.096V reference output / external reference input |
| Chân 4 | REFGND — Reference ground |
| Chân 5 | AIN0+ — Channel 0 positive analog input |
| Chân 6 | AIN0- — Channel 0 negative analog input |
| Chân 7 | GND — Ground |
| Chân 8 | AIN1+ — Channel 1 positive analog input |
| Chân 9 | AIN1- — Channel 1 negative analog input |
| Chân 10 | GND — Ground |
| Chân 11 | AIN2+ — Channel 2 positive analog input |
| Chân 12 | AIN2- — Channel 2 negative analog input |
| Chân 13 | GND — Ground |
| Chân 14 | AIN3+ — Channel 3 positive analog input |
| Chân 15 | AIN3- — Channel 3 negative analog input |
| Chân 16 | GND — Ground |
| Chân 17 | DVDD — Digital supply (2.7V-5.25V) |
| Chân 18 | DOUT — Serial data output (SPI) |
| Chân 19 | DIN — Serial data input (SPI) |
| Chân 20 | SCLK — Serial clock input (SPI) |
| Chân 21 | CS — Chip select, active low (SPI) |
| Chân 22 | EOC — End-of-conversion output flag |
| Chân 23 | CNVST — Conversion start / sample trigger |
| Chân 24 | RD — Read enable for parallel interface mode |
| Chân 25 | WR — Write enable for parallel interface mode |
| Chân 26 | D0 — Parallel data bit 0 |
| Chân 27 | D1 — Parallel data bit 1 |
| Chân 28 | D2 — Parallel data bit 2 |
| Chân 29 | D3 — Parallel data bit 3 |
| Chân 30 | D4 — Parallel data bit 4 |
| Chân 31 | D5 — Parallel data bit 5 |
| Chân 32 | D6 — Parallel data bit 6 |
| Chân 33 | D7 — Parallel data bit 7 |
| Chân 34 | D8 — Parallel data bit 8 |
| Chân 35 | D9 — Parallel data bit 9 |
| Chân 36 | D10 — Parallel data bit 10 |
| Chân 37 | D11 — Parallel data bit 11 |
| Chân 38 | D12 — Parallel data bit 12 |
| Chân 39 | D13 — Parallel data bit 13 |
| Chân 40 | D14 — Parallel data bit 14 |
| Chân 41 | D15 — Parallel data bit 15 |
| Chân 42 | GND — Ground |
| Chân 43 | DVDD — Digital supply |
| Chân 44 | PDOWN — Power-down mode control, active low |
| Chân 45 | RESET — Reset input, active low |
| Chân 46 | GND — Ground |
| Chân 47 | AVDD — +5V analog supply |
| Chân 48 | GND — Ground |
| Chân 49 | GND — Ground |
| Chân 50 | GND — Ground |
| 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 | EP — Exposed thermal pad (must be soldered to GND plane) |
Ứng dụng tiêu biểu
MAX11044BETN+ phù hợp cho 6 Áp dụngs: Three-Phase Power Quality Monitoring, Multi-Axis Motor Control and Drive Feedback, Vibration and Modal Analysis, Industrial Process Control Data Acquisition, Multi-Channel Data Acquisition Systems, Energy Management and Substation Monitoring.
Three-Phase Power Quality Monitoring
The MAX11044BETN+ fits three-phase power-quality monitoring because all four input channels capture phase A, B, C and neutral voltages simultaneously at 250 ksps per channel, preserving inter-phase timing relationships that multiplexed ADCs cannot. Its ±5V true bipolar input range connects directly to PT (potential transformer) secondaries or voltage-divider shunts without external level shifting, while the ±20V input tolerance absorbs inductive switching transients in industrial panels. The internal 4.096V reference and 16-bit no-missing-codes performance support accurate harmonic-distortion analysis up to the 125 kHz Nyquist band.
Được đề xuất
Multi-Axis Motor Control and Drive Feedback
The MAX11044BETN+ suits multi-axis motor-control feedback loops because its four simultaneously-sampling SAR ADC channels digitize phase currents (via shunt resistors) or back-EMF voltages in the same switching cycle, eliminating the time skew that a multiplexed ADC would inject into field-oriented control (FOC) calculations. With ±5V bipolar inputs, it directly interfaces to shunt amplifiers producing ±5V full-scale outputs, and its SPI-compatible serial interface streams conversion results to the host DSP without bus contention. The deterministic SAR latency simplifies control-loop timing closure at 50 kHz PWM rates common in industrial drives.
Được đề xuất
Vibration and Modal Analysis
In vibration and modal-analysis systems the MAX11044BETN+'s per-channel simultaneous-sampling capability captures force, acceleration, and displacement transducer outputs at the same instant, preserving cross-channel phase information essential for frequency-response function (FRF) computation and modal-shape reconstruction. The 250 ksps per channel throughput supports analysis bandwidths beyond 100 kHz, while the ±5V input range accepts signals directly from IEPE-compatible piezoelectric accelerometers with appropriate signal conditioning. Engineers appreciate the SPI interface for streaming 16-bit samples to a host FPGA running FFT computations.
Được đề xuất
Industrial Process Control Data Acquisition
The MAX11044BETN+ serves industrial process-control DAQ front ends because its ±5V bipolar inputs directly accept 4-20 mA current-loop-derived voltage signals (after shunt conversion) and bridge-pressure-sensor outputs from PLC analog modules. Simultaneous sampling across four channels ensures that transient process events - such as pressure spikes in a hydraulic system - are captured faithfully across all sensor inputs, rather than smeared across sequential conversions. The 56-TQFN (8x8 mm) package occupies minimal PCB area while the internal 4.096V reference eliminates an external reference IC, simplifying the BOM.
Được đề xuất
Multi-Channel Data Acquisition Systems
The MAX11044BETN+ is a strong fit for multi-channel data-acquisition systems where phase coherence between channels is non-negotiable. With four simultaneously-sampling 16-bit SAR channels at 250 ksps per channel, it delivers 1 Msps aggregate throughput while preserving inter-channel phase accuracy to within a single conversion cycle. The wide digital supply range (2.7V to 5.25V) allows pairing with 3.3V microcontrollers or 5V host FPGAs without level shifters, and the 56-TQFN package's exposed thermal pad simplifies PCB thermal management for high-throughput continuous-conversion applications.
Được đề xuất
Energy Management and Substation Monitoring
The MAX11044BETN+ fits substation energy-management systems because its four simultaneously-sampling SAR ADC channels digitize the three phase voltages and the neutral current at the same instant, computing true real power, reactive power, and harmonic content. The ±5V bipolar inputs accept 0-5V or ±5V outputs from PT/CT secondary windings directly, and the ±20V input protection absorbs the inductive transients of switchgear operation. The internal precision reference and 16-bit no-missing-codes performance meet IEC 62053-22 Class 0.2 / 0.5 metering accuracy requirements when properly calibrated.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX11044BETN+ — 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 | MAX11045BETN+ | MAX11044ETN+ | MAX11046BETN+ | MAX11040BETN+ | MAX11044BETN+T |
|---|---|---|---|---|---|---|
| Package | 56-TQFN (8x8 mm) | 56-TQFN (8x8 mm) - same | 56-TQFN (8x8 mm) - same | 56-TQFN (8x8 mm) - same | 56-TQFN (8x8 mm) - same | 56-TQFN (8x8 mm) - same |
| Brand | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated | Analog Devices / Maxim Integrated |
| Resolution | 16-bit | 14-bit | 16-bit | 16-bit | 16-bit | 16-bit |
| Number of Channels | 4 | 4 | 4 | 8 | 4 | 4 |
| Sampling Rate per Channel | 250 ksps | 250 ksps | 250 ksps | 250 ksps | lower sampling rate variant | 250 ksps |
| Input Voltage Range | ±5 V bipolar | ±5 V bipolar | ±5 V bipolar | ±5 V bipolar | ±5 V bipolar | ±5 V bipolar |
| Internal Reference | 4.096 V | 4.096 V | 4.096 V | 4.096 V | 4.096 V | 4.096 V |
| Sampling Architecture | Simultaneous (per-channel T/H) | Simultaneous (per-channel T/H) | Simultaneous (per-channel T/H) | Simultaneous (per-channel T/H) | Simultaneous (per-channel T/H) | Simultaneous (per-channel T/H) |
Bảo phân biệt quan trọng
- 16-bit resolution versus 14-bit MAX11045BETN+ (vsMAX11045BETN+)
- 4-channel versus 8-channel MAX11046BETN+ (vsMAX11046BETN+)
- True simultaneous sampling versus multiplexed ADCs (vsMAX1302 (multiplexed 16-channel SAR ADC))
Ghi chú thiết kế
Estimated: The MAX11044BETN+ requires two separate supplies - a clean +5V AVDD (analog) and a 2.7V to 5.25V DVDD (digital). Place 0.1uF ceramic decoupling capacitors within 5 mm of each AVDD pin, with a bulk 10uF tantalum or ceramic capacitor at the supply entry point. Separate analog and digital ground planes should be joined at a single point beneath the ADC's exposed pad (EP) to prevent digital switching noise from coupling into analog inputs. Estimated total quiescent current draw is approximately 40-60 mA from AVDD plus 2-5 mA from DVDD at 250 ksps, all four channels active.
Estimated: The 56-TQFN (8x8 mm) package's exposed thermal pad MUST be soldered to a continuous ground plane with at least 16 thermal vias (0.3 mm drill, 1.0 mm pitch) for proper thermal dissipation. Estimated: thermal resistance (theta_JA) with the EP soldered to a 4-layer 2x2-inch copper pad is approximately 30 C/W. Place the analog input traces as differential pairs with 50-ohm controlled impedance where possible, and keep them away from the SCLK and DOUT digital traces to minimize digital-to-analog coupling.
Common pitfalls: (1) Do not leave analog inputs floating - unused AINx+ pins should be tied to mid-scale (GND) through a defined DC voltage, or noise pickup can corrupt adjacent active channels. (2) The CNVST (conversion start) signal must be clean and monotonic; bounce or ringing can cause spurious trigger events. (3) When using the internal 4.096V reference, place a 1uF-10uF decoupling capacitor on REF and REFGND; insufficient decoupling causes excessive code-dependent noise. (4) The serial interface (SPI mode) requires DIN/SCLK/DOUT edges aligned to datasheet timing - verify against the manufacturer datasheet before bringing up code.
Estimated: At 250 ksps per channel, the SAR ADC's input-sampling capacitor presents a transient load at each conversion start. Use a low-impedance input buffer (such as the MAX4064 quad op-amp) between the sensor/transducer and each AINx+/- pair to prevent the input source impedance from degrading AC performance. Estimated: source impedance should be kept below 50 ohms at 250 ksps for full datasheet SNR - higher source impedance degrades SINAD.
Thông tin tuân thủ
RoHS compliant per distributor listings. Lead-free reflow-compatible. Halogen-free status not explicitly listed in the verified web data - defaulted to unknown.
