MAX11044BECB+T - 16-Bit 4Ch 250ksps Simultaneous-Sampling ADC | Maxim
MPN： MAX11044BECB+T ✓ 啟用中MAX11044BECB+T 概覽
A successive-approximation register (SAR) ADC is a precision data converter that performs a binary search through an internal DAC and comparator network to digitize an analog input. SAR converters are valued for their deterministic latency, lack of pipeline delay, and excellent DC accuracy, placing them in the family of precision data converters alongside delta-sigma and pipeline ADCs within the broader signal chain semiconductor hierarchy.
Key features include 4 true-differential input channels with simultaneous sampling, an internal 4.096V or external reference option, 84 dB SINAD and 87 dB SFDR at the 20 kHz input tone, ±1 LSB INL/DNL max, and a parallel digital interface. The integrated input protection accepts ±25V without damage, while the 4-channel true-differential architecture eliminates external instrumentation amplifiers in most three-phase power and vibration applications.
The device uses a charge-redistribution DAC array with a built-in high-bandwidth track-and-hold on each channel, enabling capture of dynamic signals across all four channels without inter-channel skew. Internal calibration corrects for gain and offset errors, while the exposed thermal pad provides a low-θJA thermal path for high-temperature industrial environments.
Typical applications include three-phase power-line monitoring, vibration analysis, multi-axis motor control, industrial process control, and simultaneous data acquisition systems. The bipolar ±5V input range makes the part especially useful in direct line-voltage sensing where signal conditioning stages can be eliminated.
When designing with this device, place 10 µF and 0.1 µF decoupling capacitors close to each analog supply pin and tie the exposed pad to a solid analog ground plane to minimize digital-noise coupling to the analog front end.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical PCB design notes not found in the standalone Maxim datasheet, providing engineers with a one-stop reference for component selection, validation, and sourcing.
直接替換替代品，適用於 MAX11044BECB+T — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MAX11044BECB+T （相同外形與佔位） — 差異在於 Input Type, Input Voltage Range, Number of Channels, Package, RoHS Status.
MAX11044BECB+
✅ 直接替換📋 參考替代品（不在目錄中）
MAX11047BECB+T
✅ 直接替換📋 參考替代品（不在目錄中）
MAX11047BECB+
✅ 直接替換📋 參考替代品（不在目錄中）
MAX11044ECB+T
✅ 直接替換📋 參考替代品（不在目錄中）
MAX11044ECB+
✅ 直接替換📋 參考替代品（不在目錄中）
AD7606BSTZ
✅ 直接替換✗ 缺貨
$16.9 / 單位
查看資料表 →MAX11044BECB+T 最大額定值與電氣特性
| 解析度 | 16 bit |
| Number of Channels | 4 |
| Sampling Rate (per channel) | 250 ksps |
| Aggregate Throughput | 1 Msps |
| Architecture | SAR (Successive Approximation) |
| Input Type | True Differential, Bipolar |
| 輸入電壓範圍 | ±5 V or 0 to 5 V (software configurable) |
| Input Impedance | >1 MΩ |
| Analog Supply Voltage | 5 V |
| Digital Supply Voltage | 2.7 V to 5.25 V |
| INL (max) | ±1 LSB |
| DNL (max) | ±1 LSB |
| Reference | Internal 4.096 V or external |
| Digital Interface | Parallel |
| 工作溫度 | -40°C to +85°C (industrial) |
| 封裝 | 64-TQFP-EP (10x10 mm) with exposed pad |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | ROHS3 Compliant |
MAX11044BECB+T 腳位配置
| 腳位 1 | AIN0+ — Differential analog input 0, positive |
| 腳位 2 | AIN0- — Differential analog input 0, negative |
| 腳位 3 | AGND0 — Analog ground for channel 0 |
| 腳位 4 | AVDD — Analog +5V supply |
| 腳位 5 | REF — Reference input/output (4.096V) |
| 腳位 6 | AIN1+ — Differential analog input 1, positive |
| 腳位 7 | AIN1- — Differential analog input 1, negative |
| 腳位 8 | AGND1 — Analog ground for channel 1 |
| 腳位 9 | AVDD — Analog +5V supply |
| 腳位 10 | AIN2+ — Differential analog input 2, positive |
| 腳位 11 | AIN2- — Differential analog input 2, negative |
| 腳位 12 | AGND2 — Analog ground for channel 2 |
| 腳位 13 | AVDD — Analog +5V supply |
| 腳位 14 | AIN3+ — Differential analog input 3, positive |
| 腳位 15 | AIN3- — Differential analog input 3, negative |
| 腳位 16 | AGND3 — Analog ground for channel 3 |
| 腳位 17 | AVDD — Analog +5V supply |
| 腳位 18 | DGND — Digital ground |
| 腳位 19 | DVDD — Digital supply (2.7V-5.25V) |
| 腳位 20 | DOUT15 — Parallel data output bit 15 (MSB) |
| 腳位 21 | DOUT14 — Parallel data output bit 14 |
| 腳位 22 | DOUT13 — Parallel data output bit 13 |
| 腳位 23 | DOUT12 — Parallel data output bit 12 |
| 腳位 24 | DOUT11 — Parallel data output bit 11 |
| 腳位 25 | DOUT10 — Parallel data output bit 10 |
| 腳位 26 | DOUT9 — Parallel data output bit 9 |
| 腳位 27 | DOUT8 — Parallel data output bit 8 |
| 腳位 28 | DGND — Digital ground |
| 腳位 29 | DOUT7 — Parallel data output bit 7 |
| 腳位 30 | DOUT6 — Parallel data output bit 6 |
| 腳位 31 | DOUT5 — Parallel data output bit 5 |
| 腳位 32 | DOUT4 — Parallel data output bit 4 |
| 腳位 33 | DOUT3 — Parallel data output bit 3 |
| 腳位 34 | DOUT2 — Parallel data output bit 2 |
| 腳位 35 | DOUT1 — Parallel data output bit 1 |
| 腳位 36 | DOUT0 — Parallel data output bit 0 (LSB) |
| 腳位 37 | DVDD — Digital supply (2.7V-5.25V) |
| 腳位 38 | INT_b — Active-low interrupt output [DATA_NEEDED: detailed function] |
| 腳位 39 | RD_b — Active-low read strobe |
| 腳位 40 | CS_b — Active-low chip select |
| 腳位 41 | WR_b/RST_b — Active-low write/reset [DATA_NEEDED: dual function detail] |
| 腳位 42 | CONVST — Conversion start input |
| 腳位 43 | EOC — End-of-conversion output |
| 腳位 44 | DGND — Digital ground |
| 腳位 45 | DVDD — Digital supply (2.7V-5.25V) |
| 腳位 46 | NC — Not connected (per datasheet) |
| 腳位 47 | NC — Not connected (per datasheet) |
| 腳位 48 | NC — Not connected (per datasheet) |
| 腳位 49 | NC — Not connected (per datasheet) |
| 腳位 50 | NC — Not connected (per datasheet) |
| 腳位 51 | NC — Not connected (per datasheet) |
| 腳位 52 | NC — Not connected (per datasheet) |
| 腳位 53 | NC — Not connected (per datasheet) |
| 腳位 54 | NC — Not connected (per datasheet) |
| 腳位 55 | NC — Not connected (per datasheet) |
| 腳位 56 | NC — Not connected (per datasheet) |
| 腳位 57 | NC — Not connected (per datasheet) |
| 腳位 58 | NC — Not connected (per datasheet) |
| 腳位 59 | NC — Not connected (per datasheet) |
| 腳位 60 | NC — Not connected (per datasheet) |
| 腳位 61 | NC — Not connected (per datasheet) |
| 腳位 62 | NC — Not connected (per datasheet) |
| 腳位 63 | NC — Not connected (per datasheet) |
| 腳位 64 | EP — Exposed thermal pad - tie to analog ground |
典型應用
MAX11044BECB+T 適用於 6 應用s: Three-Phase Power Line Monitoring, Multi-Axis Vibration & Modal Analysis, Motor Control & Drive Feedback, Industrial Process Control & PLCs, Simultaneous Multi-Channel Data Acquisition Systems, Power Inverter & Solar PV Monitoring.
Three-Phase Power Line Monitoring
The MAX11044BECB+T is purpose-built for three-phase power quality and metering systems. Its four true-differential simultaneous-sampling channels capture all three phase voltages plus neutral at exactly the same instant, eliminating the timing skew that would otherwise corrupt RMS, phase-angle, and harmonic-power calculations. The ±5V bipolar input range accepts direct resistive-divider connections from 110-480 VAC mains (scaled to ±5V), and the 250 ksps/ch rate captures harmonics out to several kHz, satisfying IEEE 519 power-quality analysis bandwidth requirements. Compared to a sigma-delta ADC, the SAR architecture provides deterministic latency essential for phasor measurement units (PMUs) and protective-relay algorithms.
推薦
Multi-Axis Vibration & Modal Analysis
Four-channel simultaneous sampling makes the MAX11044BECB+T ideal for multi-axis MEMS accelerometer data acquisition. The four 16-bit SAR channels digitize X/Y/Z plus a reference channel at 250 ksps/ch with zero inter-channel skew, enabling accurate FFT modal analysis and frequency-response-function (FRF) measurement. The 84 dB SINAD and 87 dB SFDR provide sufficient dynamic range for high-order vibration harmonics on industrial machinery, while ±25V input fault tolerance protects the ADC from cable-disconnect transients common in field-deployed sensor installations. The internal 4.096V reference eliminates external reference noise in vibration-isolated enclosures.
推薦
Motor Control & Drive Feedback
Field-oriented control (FOC) of three-phase BLDC/PMSM motors requires simultaneous current sensing on all three phases. The MAX11044BECB+T's four true-differential inputs digitize the three phase currents plus DC-bus voltage at the same instant, eliminating the PWM-induced measurement skew that destabilizes current-control loops. The 250 ksps/ch throughput captures current ripples well above the typical 10-20 kHz PWM switching frequency, and ±5V bipolar inputs directly accept current-sense amplifier outputs (e.g., ±5V around 2.5V bias). The 64-TQFP-EP exposed pad keeps the die temperature below 85°C even in sealed IPM-module environments.
推薦
Industrial Process Control & PLCs
Programmable Logic Controllers (PLCs) and distributed control systems (DCS) typically require 4-16 analog input channels per module with 16-bit resolution. The MAX11044BECB+T provides four high-accuracy simultaneous-sampling channels per IC, allowing a single device to handle a complete sensor cluster (pressure, flow, temperature, level) without skew between samples. The ±25V input protection tolerates industrial miswiring events, and the 64-TQFP-EP package has the thermal headroom for the sealed IP65/IP67 enclosure environments typical of process plants. Internal 4.096V reference eliminates drift in long-term temperature cycling.
推薦
Simultaneous Multi-Channel Data Acquisition Systems
Portable and rack-mounted multi-channel data acquisition (DAQ) systems for test, measurement, and laboratory use benefit from the MAX11044BECB+T's true simultaneous sampling architecture. Four 16-bit channels at 250 ksps/ch provide a clean 1 Msps aggregate throughput suitable for vibration, acoustic, and biomedical signal capture. The parallel digital interface minimizes FPGA/CPLD read latency compared to SPI-based ADCs, while the 64-TQFP-EP package fits standard 4-layer DAQ boards. The exposed pad enables sustained sampling at high channel density without thermal throttling.
推薦
Power Inverter & Solar PV Monitoring
Solar photovoltaic (PV) string monitoring, wind-turbine inverter control, and grid-tie inverter protection require multiple simultaneous voltage and current measurements. The MAX11044BECB+T digitizes DC-bus voltage, AC phase currents, and grid-voltage sense at the same instant, enabling fast MPPT loop updates and anti-islanding protection. The 87 dB SFDR ensures clean current waveforms for accurate THD measurement, and the ±5V input range directly accepts scaled CT/PT outputs. Industrial -40°C to +85°C operation is required for outdoor PV combiner boxes.
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推薦產品摘要
工程參考資料，適用於 MAX11044BECB+T — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MAX11044BECB+ | MAX11047BECB+T | MAX11044ECB+T | AD7606BSTZ |
|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Analog Devices |
| Package | 64-TQFP-EP (10x10 mm) | 64-TQFP-EP (10x10 mm) - same | 64-TQFP-EP (10x10 mm) - same | 64-TQFP-EP (10x10 mm) - same | 64-LQFP-EP (10x10 mm) - same footprint, see pinout caveat |
| Resolution | 16 bit | 16 bit | 16 bit | 16 bit | 16 bit |
| Channels | 4 simultaneous-sampling | 4 simultaneous-sampling | 4 simultaneous-sampling | 4 simultaneous-sampling | 8 simultaneous-sampling |
| Sample Rate (per ch) | 250 ksps | 250 ksps | 250 ksps | 250 ksps | 200 ksps |
| Input Range | ±5V or 0-5V bipolar/unipolar | ±5V or 0-5V bipolar/unipolar | ±5V or 0-5V bipolar/unipolar | ±5V or 0-5V bipolar/unipolar | ±5V or ±10V or 0-5V/0-10V |
| Reference | Internal 4.096V or external | Internal 4.096V or external | External reference | Internal 4.096V or external | Internal 2.5V or external |
| Interface | Parallel | Parallel | Parallel | Parallel | Parallel/Serial |
主要差異化特點
- Internal 4.096V reference with true bipolar ±5V or unipolar 0-5V input ranges (對比MAX11047BECB+T)
- B-grade ±1 LSB INL/DNL maximum vs MAX11044 (non-B) ±2 LSB (對比MAX11044ECB+T (non-B))
- Higher sample rate 250 ksps/ch vs AD7606's 200 ksps/ch (對比AD7606BSTZ)
設計說明
Estimated: Place 10 µF tantalum and 0.1 µF ceramic decoupling capacitors within 5 mm of each AVDD pin (there are 4 AVDD pins on this package). Tie all AGNDx and DGND pins together at a single-star ground point near the ADC. The exposed thermal pad must be soldered to a continuous analog-ground copper pour (minimum 1 square inch) on the top and inner PCB layers to keep junction temperature below 85°C at 250 ksps simultaneous sampling. Avoid routing digital output traces (DOUT0-DOUT15) parallel to or beneath the analog input traces - cross at 90° if overlap is unavoidable.
Route the four differential input pairs (AIN0± through AIN3±) as tightly-coupled 50Ω differential microstrip with constant 100Ω differential impedance over a solid ground plane. Each differential pair length should be matched within 0.5 mm to preserve CMRR above 80 dB at 20 kHz input. Add a 100 Ω differential source impedance (or use low-capacitance TVS arrays) if cable lengths exceed 100 mm. The high-impedance (>1 MΩ) inputs tolerate source impedances up to several kΩ with minimal settling-time penalty at 250 ksps.
Do not exceed the absolute maximum analog input of ±25V - although the device tolerates this, sustained over-voltage can damage internal ESD diodes. Always issue a software or hardware RESET (assert CS_b and WR_b/RST_b low simultaneously) after power-up to clear the conversion pipeline and initialize the internal reference. When using the internal 4.096V reference, allow at least 10 ms after power-up before initiating conversions to let the reference settle to its specified accuracy.
Estimated: At simultaneous 250 ksps sampling on all 4 channels with 5V analog supply and typical CMOS switching losses, the MAX11044BECB+T dissipates approximately 250 mW. With the 64-TQFP-EP package and proper 1 sq-in ground pour, θJA is approximately 30°C/W, yielding a 7.5°C temperature rise above ambient - well within the 125°C junction limit. For continuous full-throughput operation in sealed enclosures above 60°C ambient, verify junction temperature with the manufacturer's thermal model and consider forced-air cooling.
合規資訊
ROHS3 compliant per Maxim Integrated product page. Industrial -40°C to +85°C operating range; not AEC-Q100 qualified for automotive - look to other ADI parts for automotive-grade SAR ADCs.
