MAX11044BETN+ - 16-Bit 4-Ch 250ksps Simultaneous-Sampling SAR ADC | Maxim Integrated
N.º da peça: MAX11044BETN+ ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $27.5 | $27,50 |
| 10 | $24.75 | $247,50 |
| 100 | $22.1 | $2.210,00 |
| 500 | $19.8 | $9.900,00 |
| 1.000 | $17.95 | $17.950,00 |
MAX11044BETN+ Visão geral
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.
Alternativas drop-in para MAX11044BETN+ — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com MAX11044BETN+ (mesmo formato e footprint) — diferindo em Architecture, Number of Channels, Resolution.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MAX11045BETN+
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MAX11044ETN+
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MAX11046BETN+
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MAX11040BETN+
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MAX11044BETN+T
✅ Drop-In✓ Em estoque
$12.3 / unidade
Ver ficha técnica →MAX11044BETN+ Classificações máximas e características elétricas
| Manufacturer | Analog Devices Inc. / Maxim Integrated |
| Part Number | MAX11044BETN+ |
| Converter Type | SAR (Successive Approximation Register) ADC |
| Resolução | 16-bit |
| Number of Channels | 4 (simultaneous sampling) |
| Taxa de amostragem | 250 ksps per channel |
| Faixa de tensão de entrada | ±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 |
| Encapsulamento | 56-pin TQFN (8x8 mm) |
| Tipo de montagem | Surface Mount |
| Faixa de temperatura de operação | -40 C to +85 C (industrial, per E variants) |
| Status RoHS | Compliant |
Configuração de pinos do MAX11044BETN+
| Pino 1 | AVDD — +5V analog supply |
| Pino 2 | GND — Ground (analog/digital common) |
| Pino 3 | REF — Internal 4.096V reference output / external reference input |
| Pino 4 | REFGND — Reference ground |
| Pino 5 | AIN0+ — Channel 0 positive analog input |
| Pino 6 | AIN0- — Channel 0 negative analog input |
| Pino 7 | GND — Ground |
| Pino 8 | AIN1+ — Channel 1 positive analog input |
| Pino 9 | AIN1- — Channel 1 negative analog input |
| Pino 10 | GND — Ground |
| Pino 11 | AIN2+ — Channel 2 positive analog input |
| Pino 12 | AIN2- — Channel 2 negative analog input |
| Pino 13 | GND — Ground |
| Pino 14 | AIN3+ — Channel 3 positive analog input |
| Pino 15 | AIN3- — Channel 3 negative analog input |
| Pino 16 | GND — Ground |
| Pino 17 | DVDD — Digital supply (2.7V-5.25V) |
| Pino 18 | DOUT — Serial data output (SPI) |
| Pino 19 | DIN — Serial data input (SPI) |
| Pino 20 | SCLK — Serial clock input (SPI) |
| Pino 21 | CS — Chip select, active low (SPI) |
| Pino 22 | EOC — End-of-conversion output flag |
| Pino 23 | CNVST — Conversion start / sample trigger |
| Pino 24 | RD — Read enable for parallel interface mode |
| Pino 25 | WR — Write enable for parallel interface mode |
| Pino 26 | D0 — Parallel data bit 0 |
| Pino 27 | D1 — Parallel data bit 1 |
| Pino 28 | D2 — Parallel data bit 2 |
| Pino 29 | D3 — Parallel data bit 3 |
| Pino 30 | D4 — Parallel data bit 4 |
| Pino 31 | D5 — Parallel data bit 5 |
| Pino 32 | D6 — Parallel data bit 6 |
| Pino 33 | D7 — Parallel data bit 7 |
| Pino 34 | D8 — Parallel data bit 8 |
| Pino 35 | D9 — Parallel data bit 9 |
| Pino 36 | D10 — Parallel data bit 10 |
| Pino 37 | D11 — Parallel data bit 11 |
| Pino 38 | D12 — Parallel data bit 12 |
| Pino 39 | D13 — Parallel data bit 13 |
| Pino 40 | D14 — Parallel data bit 14 |
| Pino 41 | D15 — Parallel data bit 15 |
| Pino 42 | GND — Ground |
| Pino 43 | DVDD — Digital supply |
| Pino 44 | PDOWN — Power-down mode control, active low |
| Pino 45 | RESET — Reset input, active low |
| Pino 46 | GND — Ground |
| Pino 47 | AVDD — +5V analog supply |
| Pino 48 | GND — Ground |
| Pino 49 | GND — Ground |
| Pino 50 | GND — Ground |
| Pino 51 | NC — Not connected (per datasheet) |
| Pino 52 | NC — Not connected (per datasheet) |
| Pino 53 | NC — Not connected (per datasheet) |
| Pino 54 | NC — Not connected (per datasheet) |
| Pino 55 | NC — Not connected (per datasheet) |
| Pino 56 | EP — Exposed thermal pad (must be soldered to GND plane) |
Aplicações típicas
MAX11044BETN+ é adequado para 6 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MAX11044BETN+ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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) |
Principais diferenciais
- 16-bit resolution versus 14-bit MAX11045BETN+ (vs MAX11045BETN+)
- 4-channel versus 8-channel MAX11046BETN+ (vs MAX11046BETN+)
- True simultaneous sampling versus multiplexed ADCs (vs MAX1302 (multiplexed 16-channel SAR ADC))
Notas de projeto
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.
Informações de conformidade
RoHS compliant per distributor listings. Lead-free reflow-compatible. Halogen-free status not explicitly listed in the verified web data - defaulted to unknown.
