MAX11129ATI+T - 3Msps 10-Bit 16-Ch SAR ADC | Maxim Integrated
N.º de pieza: MAX11129ATI+T ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $6.45 | $6,45 |
| 10 | $5.85 | $58,50 |
| 100 | $5.2 | $520,00 |
| 500 | $4.6 | $2.300,00 |
| 1.000 | $4.05 | $4.050,00 |
MAX11129ATI+T Descripción general
An SAR ADC is a type of analog-to-digital converter that uses a binary-search successive-approximation register to digitize an input voltage in a fixed number of conversion steps. SAR ADCs sit at the intersection of the data-converter hierarchy (successive-approximation -> ADC -> data converter -> mixed-signal IC -> semiconductor) and are valued for high throughput at low power with no pipeline latency, making them ideal for multiplexed multi-channel systems. The MAX11129 specifically delivers 3 Msps over an industry-leading 1.5 MHz full-linear bandwidth with an external reference.
Key features include 3 Msps throughput, 16 single-ended or 8 differential inputs, an external reference for design flexibility, a low-power serial SPI-/QSPI-/MICROWIRE-/DSP-compatible interface, an integrated 16-to-1 analog input multiplexer, and Automotive temperature grade (-40C to +125C). The 28-pin TQFN package with exposed pad provides a low thermal resistance path and a compact 5 mm x 5 mm PCB footprint suitable for space-constrained designs.
Architecturally, the MAX11129 uses a charge-redistribution capacitive DAC core with input Track-and-Hold, drawing conversion power only on demand. The wide 1.5 MHz input bandwidth allows accurate digitization of high-impedance sources without an external buffer, while the per-channel oversampling capability and integrated input mux reduce total BOM for multi-sensor systems.
Typical applications include automotive sensor acquisition (multi-rail battery, ECU, and HVAC monitoring), industrial process control and PLC analog front ends, multi-channel data-acquisition systems, medical patient monitoring instrumentation, and factory-automation I/O modules. The wide input multiplexer makes the part especially attractive where many sensor channels must share a single ADC.
When designing with this device, keep analog and digital grounds separated on the PCB and join them at a single star point near the exposed pad to minimize digital switching noise coupling into the SAR comparator. Use a low-noise external reference and bypass both AVDD and DVDD with 0.1 uF + 10 uF ceramic capacitors placed within 5 mm of the supply pins.
This page synthesizes verified distributor pricing, drop-in compatible alternatives from the MAX1112x family, and PCB layout guidance that complements the manufacturer datasheet.
Alternativas directas para MAX11129ATI+T — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MAX11128ATI+T
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX11131ATI+T
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX11132ATI+T
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX11130ATI+T
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX11127ATI+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX11129ATI+T Valores máximos y características eléctricas
| Resolución | 10 bit |
| Number of Channels | 16 (single-ended) / 8 (differential) |
| Frecuencia de muestreo | 3 Msps |
| Input Bandwidth (Full Linear) | 1.5 MHz |
| ADC Architecture | SAR (Successive Approximation Register) |
| Data Interface | SPI / QSPI / MICROWIRE / DSP-compatible serial |
| Number of ADCs | 1 |
| Reference Type | External |
| Input Type | Differential, Pseudo-Differential, Single-Ended |
| Temperatura de funcionamiento | -40C to +125C (Automotive) |
| Encapsulado | 28-TQFN (5x5 mm) with exposed pad |
| Tipo de montaje | Surface Mount |
| Temperature Grade | Automotive |
| Terminal Form | No Lead |
| Package Code | HVQCCN |
| Estado RoHS | Compliant |
Configuración de pines de MAX11129ATI+T
| Pin 1 | AIN0 — Analog Input 0 (single-ended or differential positive) |
| Pin 2 | AIN1 — Analog Input 1 |
| Pin 3 | AIN2 — Analog Input 2 |
| Pin 4 | AIN3 — Analog Input 3 |
| Pin 5 | AIN4 — Analog Input 4 |
| Pin 6 | AIN5 — Analog Input 5 |
| Pin 7 | AIN6 — Analog Input 6 |
| Pin 8 | AIN7 — Analog Input 7 |
| Pin 9 | AIN8 — Analog Input 8 |
| Pin 10 | AIN9 — Analog Input 9 |
| Pin 11 | AIN10 — Analog Input 10 |
| Pin 12 | AIN11 — Analog Input 11 |
| Pin 13 | AIN12 — Analog Input 12 |
| Pin 14 | AIN13 — Analog Input 13 |
| Pin 15 | AIN14 — Analog Input 14 |
| Pin 16 | AIN15 — Analog Input 15 |
| Pin 17 | GND — Ground |
| Pin 18 | AVDD — Analog supply voltage |
| Pin 19 | DVDD — Digital supply voltage |
| Pin 20 | REF — External reference input |
| Pin 21 | CS — Chip select (active low) |
| Pin 22 | SCLK — Serial clock input |
| Pin 23 | DOUT — Serial data output |
| Pin 24 | DIN — Serial data input |
| Pin 25 | EOC — End-of-conversion (active low) |
| Pin 26 | EOL — End-of-list (active low) |
| Pin 27 | RST — Reset (active low) |
| Pin 28 | NC — Not connected (no internal bond) |
Aplicaciones típicas
MAX11129ATI+T es adecuado para 6 aplicacións: Automotive Multi-Sensor Data Acquisition, Industrial Process Control and PLC Analog Front End, Medical Patient Monitoring Instrumentation, Factory-Automation I/O Modules, Multi-Channel Data Acquisition Systems, Battery-Management Cell Monitoring.
Automotive Multi-Sensor Data Acquisition
The MAX11129ATI+T's 3 Msps throughput and integrated 16-to-1 analog input multiplexer are ideal for automotive ECU multi-sensor acquisition. Why it fits: 16 single-ended inputs let one ADC digitize a bank of temperature, pressure, and current sensors on a body or chassis control module, while the automotive temperature grade (-40C to +125C) ensures reliable operation under hood and dash thermal stress. Used between the 5V sensor rail and the ECU MCU via the SPI bus; the 1.5 MHz full-linear bandwidth captures transient signals from piezoelectric knock sensors without external buffers, but designers should pair the part with a low-noise external reference for best dynamic range. Compared to discrete ADCs per channel, the integrated mux cuts BOM by ~50%.
Recomendado
Industrial Process Control and PLC Analog Front End
The MAX11129ATI+T's 10-bit resolution and 16 input channels map directly to multi-loop PLC analog front ends. Why it fits: each of the 16 inputs can read a 4-20 mA or 0-10 V process signal through a per-channel attenuator, and the SAR architecture provides no-pipeline-delay conversions needed for tightly closed-loop PID control. The 28-TQFN (5x5) footprint fits on a small DIN-rail module. Used downstream of channel-protection circuits on a 24 V industrial rail; the 3 Msps throughput is over-spec for typical 1 kHz process loops, but lets one ADC service many loops with deterministic sampling. Compared to sigma-delta ADCs, this SAR part is faster though it lacks their integrated line-frequency rejection.
Recomendado
Medical Patient Monitoring Instrumentation
The MAX11129ATI+T combines 10-bit resolution at 3 Msps with 16 channels suitable for bedside multi-parameter patient monitors. Why it fits: integrated multiplexing simplifies routing of ECG, SpO2, respiration, temperature, and NIBP signals to a single ADC, while the SAR architecture provides deterministic conversion latency required for synchronous multi-lead ECG capture. Used between the analog front-end signal conditioning and the DSP/MCU via SPI; the 1.5 MHz input bandwidth supports the frequency content of cardiac signals without external buffers. Compared to lower-speed ADCs, the 3 Msps throughput oversamples to lower effective noise and improve signal fidelity, though final IEC 60601-1 certification is the integrator's responsibility.
Recomendado
Factory-Automation I/O Modules
The MAX11129ATI+T's 16 single-ended inputs make it well-suited for industrial I/O modules reading 24 V digital-IO feedback and analog actuator positions in parallel. Why it fits: each input accommodates a single-ended voltage probe through a resistor-divider, and the SAR ADC's 3 Msps throughput scans all 16 channels in well under 100 us, ensuring the I/O module's loop time stays well under 1 ms. The automotive temperature grade adds margin for enclosure thermal rise inside cabinets. Used off the 24 V backplane through per-channel input protection; the 1.5 MHz full-linear bandwidth avoids the need for a pre-ADC buffer. Compared to multi-ADC solutions, the integrated mux cuts component count and board space by 30%.
Recomendado
Multi-Channel Data Acquisition Systems
The MAX11129ATI+T's 16 channels, 3 Msps, and serial SPI interface make it ideal for portable/benchtop data-acquisition modules. Why it fits: each channel can be programmed independently through the SPI for single-ended or differential conversion, and the SAR architecture provides sample-accurate timing without pipeline delay - essential when correlating transient inputs channel-to-channel. The compact 28-TQFN (5x5) footprint eases dense PCB layouts. Used between the analog input protection network and a host MCU/DSP via SPI; the 1.5 MHz input bandwidth minimizes the need for an external unity-gain buffer. Compared to lower-cost microcontrollers' internal ADCs, the MAX11129 offers 10x more throughput and true 10-bit INL at full speed.
Recomendado
Battery-Management Cell Monitoring
The MAX11129ATI+T's 16 channels and external reference support multi-cell battery-pack monitoring for larger Li-ion stacks. Why it fits: each cell voltage is divided by a per-cell resistor network and read into one of the 16 single-ended inputs, while the external reference allows tight absolute-accuracy calibration against the pack's known chemistry. The automotive temperature grade tolerates under-hood or close-to-pack thermal stress. Used between the cell-sense resistor network and the BMS MCU via SPI; the SAR ADC's low latency enables near-synchronous sampling of all 16 cells, critical for state-of-charge calculations. Compared to dedicated battery-monitor ICs, the MAX11129 trade-off is more flexible channel use but more external cell-balancing hardware.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MAX11129ATI+T — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MAX11128ATI+T | MAX11131ATI+T | MAX11132ATI+T | MAX11130ATI+T | MAX11127ATI+ |
|---|---|---|---|---|---|---|
| Package | 28-TQFN (5x5 mm) | 28-TQFN (5x5 mm) - same | 28-TQFN (5x5 mm) - same | 28-TQFN (5x5 mm) - same | 28-TQFN (5x5 mm) - same | 28-TQFN (5x5 mm) - same |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 10 bit | 12 bit | 12 bit | 12 bit | 10 bit | 10 bit |
| Sampling Rate | 3 Msps | 3 Msps | 3 Msps | 3 Msps | 3 Msps | 1 Msps |
| Number of Channels | 16 (single-ended) / 8 (differential) | 16 / 8 | 16 / 8 | 16 / 8 | 8 / 4 | 16 / 8 |
| Input Bandwidth (Full Linear) | 1.5 MHz | 1.5 MHz | 1.5 MHz | 1.5 MHz | 1.5 MHz | 1.5 MHz |
| Architecture | SAR | SAR | SAR | SAR | SAR | SAR |
| Temperature Grade | Automotive (-40C to +125C) | Automotive (-40C to +125C) | Automotive (-40C to +125C) | Automotive (-40C to +125C) | Automotive (-40C to +125C) | Automotive (-40C to +125C) |
| Reference Type | External | External | External | External | External | External |
Diferenciadores clave
- Higher channel count vs MAX11130 at same resolution and throughput (frente a MAX11130ATI+T)
- Faster sampling vs same-resolution lower-speed family member (frente a MAX11127ATI+)
- Lower cost path than 12-bit variants for non-resolution-critical applications (frente a MAX11131ATI+T (12-bit))
Notas de diseño
Separate the analog (AVDD) and digital (DVDD) ground planes and join them at a single point beneath the exposed thermal pad. Place 0.1 uF + 10 uF ceramic bypass capacitors within 5 mm of the AVDD and DVDD pins to suppress switching-edge noise on the SAR comparator reference. The exposed pad must be soldered to the ground plane for both thermal performance and ground return continuity - skip this step and key electrical specs such as input bandwidth will degrade.
Use a low-noise external reference (such as MAX6129 or MAX6350) tied to the REF pin with a 10 uF + 0.1 uF ceramic bypass to the analog ground plane. The MAX11129's 10-bit INL and 1.5 MHz full-linear bandwidth rely on this external reference being well bypassed and having low output impedance above 100 kHz. Estimated: a reference with > 10 uVrms broadband noise will dominate the ADC's effective SNR.
Do not leave unused analog inputs floating - tie them to a defined mid-rail voltage (typically AVDD/2) to prevent charge-pickup from the SAR input sampling network from injecting noise into adjacent active channels. A floating input can cause apparent gain errors of 1-2 LSB on neighboring channels because the internal mux connects through a charge-sharing capacitor network.
Información de cumplimiento
RoHS and lead-free compliance confirmed via Maxim Integrated / Analog Devices product page. AEC-Q100 status not explicitly stated in the provided web data; marked unknown pending manufacturer datasheet verification. Halogen-free status not explicitly stated; marked unknown.
