MAX116EAX+ - 12-Bit 8-Channel Simultaneous-Sampling ADC | Maxim
N.º da peça: MAX116EAX+ ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $28.5 | $28,50 |
| 10 | $25.65 | $256,50 |
| 100 | $22.8 | $2.280,00 |
| 500 | $20.5 | $10.250,00 |
| 1.000 | $18.25 | $18.250,00 |
MAX116EAX+ Visão geral
What is an ADC? An analog-to-digital converter (ADC) is a semiconductor device that transforms continuous analog voltage signals into discrete digital codes suitable for processing by microcontrollers, DSPs, or FPGAs. The MAX116EAX+ belongs to the successive-approximation register (SAR) ADC family, which trades conversion speed for high resolution and low power consumption. In the broader signal-chain taxonomy, this part sits as: ADC -> data converter -> data acquisition IC -> mixed-signal semiconductor, serving as the bridge between analog sensors and digital processing.
Key features include four true simultaneous-sampling T/H amplifiers that capture analog inputs at the same instant - critical for phase-sensitive measurements such as power-line monitoring, motor control, and vibration analysis where skew between channels would corrupt the measurement. The device operates from a single +5V analog supply and a +5V digital supply, includes an internal 4.096V reference, and provides a high-speed parallel interface for direct connection to microcontrollers or FPGAs.
Architecturally, the MAX116EAX+ uses a successive-approximation conversion core with separate analog and digital grounds to minimize noise coupling. Each channel pair shares a T/H front-end that holds the input during conversion, and the two multiplexers per T/H let the user choose between two sources per channel without external switching. Power dissipation is approximately 50 mW during continuous conversion and drops to under 1 mW in software-programmed shutdown modes.
Typical applications include multi-phase power-line monitoring, three-phase motor control feedback, vibration and modal analysis, sonar and acoustic beamforming, simultaneous multi-sensor data acquisition, and industrial process control. The simultaneous-sampling architecture is the defining feature for any application where the relative phase between channels carries information.
When designing with this part, route the analog and digital ground planes separately and join them at a single point under the IC's GND pin. Use 0.1 uF ceramic bypass capacitors within 5 mm of each supply pin, and consider an external reference if absolute accuracy better than the internal 4.096V drift allows is required.
This page synthesizes distributor pricing, drop-in alternative candidates, and practical design notes not consolidated in the manufacturer datasheet, helping engineers shorten selection time for multi-channel data acquisition designs.
Alternativas drop-in para MAX116EAX+ — 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 MAX116EAX+ (mesmo formato e footprint) — diferindo em Number of Channels, Package, Resolution, RoHS Status, Architecture.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MAX116CEAX+
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
MAX116EAX+T
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$9.62 / unidade
Ver ficha técnica →MAX116EAX+ Classificações máximas e características elétricas
| Resolução | 12 bit |
| Number of Channels | 8 single-ended (2x4 simultaneous-sampling pairs) |
| Conversion Architecture | SAR (Successive Approximation Register) |
| Conversion Time per Channel | 2 us |
| Throughput - 1 Channel | 390 ksps |
| Throughput - 2 Channels | 218 ksps |
| Throughput - 3 Channels | 152 ksps |
| Throughput - 4 Channels | 116 ksps |
| Input Configuration | Single-ended, 2 MUX per T/H (4 T/H total) |
| Analog Supply Voltage | +5 V |
| Digital Supply Voltage | +5 V |
| Internal Reference Voltage | 4.096 V |
| Interface | Parallel (high-speed) |
| Encapsulamento | 36-pin SSOP |
| Faixa de temperatura de operação | -40C to +85C |
| Temperature Grade | Industrial |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
Configuração de pinos do MAX116EAX+
| Pino 1 | AIN1A — Analog input 1A (T/H 1, MUX A) |
| Pino 2 | AIN1B — Analog input 1B (T/H 1, MUX B) |
| Pino 3 | AGND — Analog ground |
| Pino 4 | AIN2A — Analog input 2A (T/H 2, MUX A) |
| Pino 5 | AIN2B — Analog input 2B (T/H 2, MUX B) |
| Pino 6 | AGND — Analog ground |
| Pino 7 | AIN3A — Analog input 3A (T/H 3, MUX A) |
| Pino 8 | AIN3B — Analog input 3B (T/H 3, MUX B) |
| Pino 9 | AGND — Analog ground |
| Pino 10 | AIN4A — Analog input 4A (T/H 4, MUX A) |
| Pino 11 | AIN4B — Analog input 4B (T/H 4, MUX B) |
| Pino 12 | AGND — Analog ground |
| Pino 13 | AVDD — +5V analog supply |
| Pino 14 | REF — Reference voltage (4.096V internal) |
| Pino 15 | REFADJ — Reference adjust |
| Pino 16 | AVDD — +5V analog supply |
| Pino 17 | AGND — Analog ground |
| Pino 18 | CHSEL — Channel select |
| Pino 19 | CONVST — Conversion start |
| Pino 20 | CS — Chip select (active low) |
| Pino 21 | RD — Read (active low) |
| Pino 22 | D0 — Data bit 0 (LSB) |
| Pino 23 | D1 — Data bit 1 |
| Pino 24 | D2 — Data bit 2 |
| Pino 25 | D3 — Data bit 3 |
| Pino 26 | D4 — Data bit 4 |
| Pino 27 | D5 — Data bit 5 |
| Pino 28 | D6 — Data bit 6 |
| Pino 29 | D7 — Data bit 7 |
| Pino 30 | D8 — Data bit 8 |
| Pino 31 | D9 — Data bit 9 |
| Pino 32 | D10 — Data bit 10 |
| Pino 33 | D11 — Data bit 11 (MSB) |
| Pino 34 | DGND — Digital ground |
| Pino 35 | DVDD — +5V digital supply |
| Pino 36 | DVDD — +5V digital supply |
Aplicações típicas
MAX116EAX+ é adequado para 6 aplicaçãos: Three-Phase Power Line Monitoring, Multi-Axis Vibration and Modal Analysis, Industrial Process Control Data Acquisition, Sonar and Acoustic Beamforming Arrays, Motor Control Current Sensing, Medical Patient Monitoring Multi-Sensor Front-End.
Three-Phase Power Line Monitoring
The MAX116EAX+ suits three-phase power monitoring because its four simultaneous-sampling track-and-hold amplifiers capture all phase voltages at the same instant, eliminating the sequential skew that a multiplexed ADC would introduce. With 390 ksps single-channel throughput, the device tracks 50/60 Hz mains waveforms with substantial oversampling headroom for harmonic analysis up to the 32nd harmonic or higher. Each phase voltage is scaled into the 0-4.096V input range using resistor dividers, and the internal 4.096V reference provides an LSB of 1 mV for accurate RMS calculations. Compared with a switching supply + multiplexed-ADC approach, the MAX116EAX+ draws under 50 mW and avoids injecting switching noise into the measurement path. Recommended companion MPNs include the MAX6062 for the reference bypass path and the MAX4475 for front-end analog signal conditioning.
Recomendado
Multi-Axis Vibration and Modal Analysis
For vibration analysis on rotating machinery or structural modal testing, the MAX116EAX+ captures four accelerometer channels simultaneously with nanosecond-scale channel-to-channel skew, which is critical for mode-shape extraction and phase-coherent frequency response function (FRF) measurements. The 116 ksps 4-channel aggregate throughput supports vibration analysis up to 50 kHz with proper anti-alias filtering, which is the practical upper limit for most accelerometer-based modal surveys. Each IEPE accelerometer signal is conditioned through an AC-coupled buffer into the ADC input range; the 1 mV LSB at 4.096V reference yields 12-bit dynamic range sufficient for distinguishing structural modes from broadband noise floor. The 36-pin SSOP package footprint is consistent with the XAIPART Site MPN list candidates for related ADC parts. The MAX116EAX+ replaces the need for four synchronized single-channel ADCs at a fraction of the BOM cost and PCB area.
Recomendado
Industrial Process Control Data Acquisition
The MAX116EAX+ integrates well into multi-sensor industrial process control front-ends where temperature, pressure, flow, and level transmitters must be sampled synchronously. Each of the four T/H channels can be MUX'd between two sensors, providing eight single-ended inputs total - sufficient for a small distributed control system (DCS) or batch reactor monitoring loop. The +5V analog supply, internal 4.096V reference, and 12-bit resolution yield a measurement resolution adequate for 4-20 mA loop-derived signals after resistor termination. Parallel interface simplifies connection to legacy PLC backplanes or FPGA-based controllers without serial-link overhead. Designers should isolate the analog and digital ground planes with a single-point tie under the IC's GND pin to maintain noise immunity in electrically noisy plant environments.
Recomendado
Sonar and Acoustic Beamforming Arrays
Sonar beamforming applications rely on phase-coherent sampling across multiple hydrophone elements to compute direction-of-arrival through delay-and-sum algorithms. The MAX116EAX+ simultaneous-sampling T/H architecture guarantees that the four sampled channels retain the relative phase information required for accurate beam steering at frequencies up to tens of kilohertz. Each hydrophone pre-amplifier output is AC-coupled into the ADC input, and the 390 ksps single-channel mode allows extended bandwidth sampling when fewer channels are active. The SSOP-36 footprint is compact enough to deploy multiple MAX116EAX+ devices across a hydrophone array without dominating PCB real estate. Compared with discrete T/H + ADC chains, the integrated solution cuts BOM cost and inter-channel skew calibration time.
Recomendado
Motor Control Current Sensing
Field-oriented control (FOC) of three-phase brushless motors requires simultaneous sampling of at least two phase currents (with the third derived by Kirchhoff's law) to perform the Clarke and Park transformations. The MAX116EAX+ samples two or three current-sense amplifier outputs simultaneously, which is essential because the controller must apply vector rotation at the exact same instant for each phase. With 218 ksps throughput in dual-channel mode, the device supports PWM frequencies up to 20 kHz with multiple samples per PWM period. Hall-effect or shunt-resistor current sensors feed into the ADC through differential-to-single-ended conversion, and the 1 mV LSB at 4.096V reference provides adequate resolution for motor torque control. The integrated T/H eliminates the need for an external sample-and-hold per channel.
Recomendado
Medical Patient Monitoring Multi-Sensor Front-End
Multi-parameter patient monitors - capturing ECG, SpO2, respiration, and temperature - benefit from synchronized ADC sampling so that derived parameters such as pulse-transit time are computed from time-aligned waveforms. The MAX116EAX+ provides four simultaneous-sampling channels with 12-bit resolution sufficient for clinical-grade ECG (typically 0.5 mV full-scale, requiring at least 10 bits after filtering). Each bio-signal channel is conditioned through an isolation amplifier (for patient safety per IEC 60601-1) and then fed into the ADC. The compact 36-pin SSOP footprint supports portable and wearable monitor form factors. The internal 4.096V reference simplifies the analog front-end by removing the need for a separate precision reference IC, which reduces both cost and PCB area.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MAX116EAX+ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MAX116CEAX+ | MAX116EAX+T |
|---|---|---|---|
| Package | 36-SSOP | 36-SSOP - same | 36-SSOP - same |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 12 bit | 12 bit | 12 bit |
| Channel Count | 8 single-ended (2x4) | 8 single-ended (2x4) | 8 single-ended (2x4) |
| Throughput (1-ch) | 390 ksps | 390 ksps | 390 ksps |
| Temperature Grade | Industrial -40C to +85C | Commercial 0C to +70C | Industrial -40C to +85C |
| Internal Reference | 4.096 V | 4.096 V | 4.096 V |
| Interface | Parallel | Parallel | Parallel |
| Lifecycle Status | NRND | NRND | NRND |
Principais diferenciais
- Four on-chip simultaneous-sampling track-and-hold amplifiers (vs MAX174AEWI+T)
- Industrial temperature range standard part (vs MAX116CEAX+)
- Integrated 4.096V reference simplifies BOM (vs External-reference-only competitors)
Notas de projeto
Route the analog and digital ground planes as separate islands and tie them at a single point directly under the AGND/DGND pins of the MAX116EAX+. Place a 0.1 uF ceramic decoupling capacitor within 5 mm of each AVDD and DVDD pin, with a 10 uF bulk tantalum or ceramic capacitor at the supply entry point. Keep digital output traces (D0-D11, CONVST, RD, CS) away from the analog input pins (AIN1A through AIN4B) to prevent digital switching noise from coupling into the high-impedance sampling path.
Avoid driving the analog inputs beyond the absolute maximum rating of AVDD + 0.3V; over-voltage on any input pin can permanently damage the internal T/H amplifier. When the four T/H channels operate continuously, ensure the input source impedance is below 1 kOhm to avoid conversion-time-dependent gain errors. The internal 4.096V reference has a finite output drive capability; if multiple ADCs share the same reference, buffer it with a low-offset op-amp such as the MAX4475 to prevent reference loading errors.
For best signal-to-noise ratio, AC-couple small AC signals (such as audio or vibration) into the ADC input with a 10 uF coupling capacitor and bias the input at mid-scale (2.048V) through a high-impedance resistor divider. This places the AC signal symmetrically within the input range and maximizes the usable dynamic range. Add a small RC anti-aliasing filter (typically 10 kOhm / 1 nF for ~16 kHz bandwidth) immediately before the ADC input pin to remove out-of-band noise that could otherwise alias into the conversion result.
Power sequencing: bring up AVDD before DVDD to prevent digital logic from driving into unpowered analog input structures. The MAX116EAX+ draws approximately 10 mA from AVDD and 1 mA from DVDD during active conversion; in shutdown mode, both currents drop below 100 uA. If the design uses a switching regulator for the analog supply, add a ferrite bead and additional LC filtering on the AVDD rail to suppress switching ripple that could otherwise appear as ADC noise.
Informações de conformidade
RoHS and REACH compliant per Maxim Integrated product declaration. Not AEC-Q100 qualified - this is an industrial/consumer part. Lifecycle status NRND (Not Recommended for New Designs) per Maxim/ADI lifecycle policy.
