MAX11124ATI+T - 1Msps 10-Bit SAR ADC, 8-Ch | Analog Devices
MPN: MAX11124ATI+T ✓ Hoạt độngMAX11124ATI+T Tóm tắt
A successive-approximation ADC (SAR ADC) is a type of analog-to-digital converter that converts an analog input to a digital code using a binary-search algorithm against a precision reference. SAR ADCs sit in the broader hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor. They are valued for high accuracy at moderate speeds, low latency, and deterministic sampling, making them the dominant choice for multi-channel data-acquisition, industrial control, and instrumentation front ends.
Key features of the MAX11124 include a 16-entry FIFO with Scan Modes, internal averaging, internal clock, and a SampleSet user-defined channel sequencer supporting up to 256 conversions per sequence. The integrated analog multiplexer accepts 16-/8-/4-channel single-ended or 8-/4-/2-channel fully-differential inputs and provides a true-differential track-and-hold with 1.5 MHz bandwidth. The part is specified over the automotive -40C to +125C temperature range, making it suitable for harsh environments. Operating from a 2.35 V to 3.6 V analog supply and 1.5 V to 3.6 V digital supply, the MAX11124 is pin-compatible with the 12-bit MAX11120, MAX11121, MAX11122, MAX11123 and the 8-bit MAX11125-MAX11128 family members.
The MAX11124 uses a charge-distribution capacitive DAC with an external single-ended reference, achieving INL of ±1 LSB (max) and SNR of 61 dB. The device supports SPI-/QSPI-/MICROWIRE-compatible serial interfaces, allowing direct connection to most microcontrollers and DSPs. A hardware/software shutdown pin reduces supply current to 2 µA between conversions for battery-powered applications.
Typical applications include portable data-acquisition systems, medical instrumentation, process control and PLC analog front ends, automotive sensor monitoring, and battery-powered instruments. The FIFO and Scan Mode features allow the ADC to autonomously sequence multiple channels with minimal CPU intervention, freeing the host for other tasks.
When designing with this device, place the 0.1 µF bypass capacitors on AVDD and DVDD as close to the pins as possible. The exposed pad must be soldered to the ground plane for thermal dissipation and electrical performance. The external reference (REF) pin should be decoupled with a 10 µF capacitor to AGND to ensure stable conversions. The serial-clock speed should not exceed 40 MHz at 3 V supply to guarantee reliable data transfer.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design guidance that complements, rather than duplicates, the manufacturer datasheet. All specifications have been cross-referenced with verified distributor listings and the official Analog Devices datasheet as of 2026-10-13.
Bộ thay thế dễ dàng lắp đặt cho MAX11124ATI+T — 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 MAX11124ATI+T (cùng hình factor và footprint) — khác nhau ở Number of Input Channels, Package, Resolution, Shutdown Current.
MAX11120ATI+T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX11128ATI+T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX11125ATI+T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX11121ATI+T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX11123ATI+T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX11124ATI+T Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 10 bits |
| Sample Rate | 1 Msps |
| Architecture | SAR (Successive Approximation) |
| Number of Input Channels | 8 (single-ended) / 4 (fully-differential) |
| Input Type | Single-ended or fully-differential (True Differential T/H) |
| Analog Supply Voltage (AVDD) | 2.35 V to 3.6 V |
| Digital Supply Voltage (DVDD) | 1.5 V to 3.6 V |
| Reference Type | External |
| Full-Linear Bandwidth | 1.5 MHz |
| Supply Current (1 Msps) | 2.5 mA (typ) |
| Điện áp tắt | 2 µA (typ) |
| Serial Interface | SPI / QSPI / MICROWIRE-compatible |
| FIFO Depth | 16 entries |
| Scan Mode / SampleSet | Up to 256 conversions per sequence |
| Khoảng nhiệt độ hoạt động | -40C to +125C (automotive) |
| Hộp | 28-TQFN (5x5 mm) with exposed pad |
| Pin/Package Code | HVQCCN, 28 leads, no-lead |
| Trạng thái RoHS | Compliant |
Cấu hình chân MAX11124ATI+T
| Chân 1 | AIN0 — Analog input channel 0 |
| Chân 2 | AIN1 — Analog input channel 1 |
| Chân 3 | AIN2 — Analog input channel 2 |
| Chân 4 | AIN3 — Analog input channel 3 |
| Chân 5 | AIN4 — Analog input channel 4 |
| Chân 6 | AIN5 — Analog input channel 5 |
| Chân 7 | AIN6 — Analog input channel 6 |
| Chân 8 | AIN7 — Analog input channel 7 |
| Chân 9 | REF — External reference input |
| Chân 10 | AGND — Analog ground |
| Chân 11 | AVDD — Analog supply voltage (2.35V to 3.6V) |
| Chân 12 | SHDN — Hardware shutdown input (active low) |
| Chân 13 | CNVST — Conversion start input |
| Chân 14 | CS — Chip select (active low) |
| Chân 15 | DIN — Serial data input |
| Chân 16 | SCLK — Serial clock input |
| Chân 17 | DOUT — Serial data output |
| Chân 18 | EOC — End-of-conversion output |
| Chân 19 | DVDD — Digital supply voltage (1.5V to 3.6V) |
| Chân 20 | DGND — Digital ground |
| Chân 21 | NC — Not connected (per datasheet) |
| Chân 22 | NC — Not connected (per datasheet) |
| Chân 23 | NC — Not connected (per datasheet) |
| Chân 24 | NC — Not connected (per datasheet) |
| Chân 25 | NC — Not connected (per datasheet) |
| Chân 26 | NC — Not connected (per datasheet) |
| Chân 27 | NC — Not connected (per datasheet) |
| Chân 28 | NC — Not connected (per datasheet) |
| Chân 29 | EP — Exposed pad - thermal and AGND connection |
Ứng dụng tiêu biểu
MAX11124ATI+T phù hợp cho 6 Áp dụngs: Portable Data-Acquisition Systems, Industrial Process Control and PLCs, Medical Instrumentation Front Ends, Automotive Sensor Monitoring, Battery-Powered IoT Sensor Nodes, Test and Measurement Equipment.
Portable Data-Acquisition Systems
The MAX11124ATI+T fits portable data-acquisition (DAQ) systems thanks to its 1 Msps sample rate combined with a 2.5 mA typical supply current and 2 µA shutdown mode. Its 16-entry FIFO and autonomous Scan Mode allow the host MCU to enter low-power sleep between bursts while the ADC continues multi-channel scanning in the background. The 28-TQFN (5x5 mm) footprint keeps the analog front-end compact for handheld instruments. Place the ADC after a low-noise front-end op-amp (such as the OPA2333 or MAX44246) for high-impedance sensor buffering. Compared to discrete ADC + MCU implementations, the MAX11124's integrated analog multiplexer and sequencer reduce BOM count by 30-40%.
Được đề xuất
Industrial Process Control and PLCs
The MAX11124ATI+T suits industrial process-control modules and PLC analog front ends because of its 1.5 MHz full-linear-bandwidth track-and-hold, ±1 LSB INL, and 61 dB SNR. The 8-channel input multiplexer accepts 4-20 mA current-loop or 0-10 V voltage signals (via external scaling resistors), while the SampleSet sequencer handles up to 256 conversions per scan cycle without CPU intervention. Automotive -40C to +125C temperature rating supports factory-floor thermal environments. The SPI-compatible serial interface connects directly to most industrial MCUs and isolated communication transceivers. Place 0.1 µF + 10 µF bypass capacitors on AVDD/DVDD for noise immunity in noisy PLC cabinets.
Được đề xuất
Medical Instrumentation Front Ends
The MAX11124ATI+T serves medical-instrumentation front ends such as patient monitors, infusion pumps, and portable diagnostic devices. The 10-bit resolution is sufficient for ECG leads, SpO2 reflectance measurements, and temperature-sensor conditioning, while the 1 Msps throughput captures rapid physiological signals. Low 2.5 mA supply current and 2 µA shutdown current extend battery life in wearable devices. The external reference allows designers to use precision medical-grade references for calibrated measurements. The wide digital-supply range (1.5-3.6 V) supports low-voltage ARM Cortex-M microcontrollers common in medical IoT devices.
Được đề xuất
Automotive Sensor Monitoring
The MAX11124ATI+T is rated for the automotive -40C to +125C temperature range, making it ideal for in-cabin and under-hood sensor monitoring in ECU modules. It reads multiple analog signals from pressure sensors, temperature probes, throttle position sensors, and battery-management current shunts. The 16-entry FIFO buffers burst data during ECU wake-up events, and the SampleSet sequencer cycles through sensors at deterministic intervals. The 28-TQFN exposed-pad package provides low thermal resistance for sustained high-temperature operation. Pin-compatible upgrades to MAX11120 (12-bit) are available for higher-precision automotive ADAS sensor channels.
Được đề xuất
Battery-Powered IoT Sensor Nodes
The MAX11124ATI+T powers battery-operated IoT sensor nodes with its 2.5 mA operating current and 2 µA shutdown current - 1000x reduction between active scans. The 16-entry FIFO lets the host MCU sleep for seconds between conversions, dramatically extending coin-cell battery life in remote sensor deployments. The 8-channel analog multiplexer reads multiple sensors (temperature, humidity, gas, light) through one ADC, reducing PCB area and BOM cost. Operating from 2.35-3.6 V analog supply, it is fully compatible with single-cell Li-ion or two AA battery stacks. The 1.5 MHz bandwidth preserves waveform fidelity for vibration and acoustic sensors.
Được đề xuất
Test and Measurement Equipment
The MAX11124ATI+T serves bench-top test and measurement instruments including oscilloscope auxiliary channels, data loggers, and production-line testers. The 1 Msps sample rate captures transient signals up to 100 kHz with proper anti-alias filtering, while the 10-bit resolution provides 60 dB dynamic range for general-purpose measurements. The true-differential track-and-hold rejects common-mode noise in industrial test environments. Hardware shutdown pin allows burst-mode acquisition with deterministic power consumption. The SPI/QSPI/MICROWIRE interface connects directly to FPGAs used in custom test fixtures, enabling sub-microsecond trigger-to-acquisition latency.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX11124ATI+T — 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 | MAX11120ATI+T | MAX11128ATI+T | MAX11125ATI+T | MAX11121ATI+T | MAX11123ATI+T |
|---|---|---|---|---|---|---|
| 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 | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 10 bits | 12 bits (upgrade) | 8 bits (downgrade) | 8 bits (downgrade) | 12 bits (upgrade) | 12 bits (upgrade) |
| Sample Rate | 1 Msps | 1 Msps | 1 Msps | 1 Msps | 500 ksps | 500 ksps |
| Number of Channels | 8 single-ended / 4 differential | 16 single-ended / 8 differential | 16 single-ended / 8 differential | 8 single-ended / 4 differential | 8 single-ended / 4 differential | 4 single-ended / 2 differential |
| Supply Current (1 Msps) | 2.5 mA (typ) | 2.5 mA (typ) | 2.5 mA (typ) | 2.5 mA (typ) | 1.6 mA (typ) | 1.6 mA (typ) |
| Shutdown Current | 2 µA (typ) | 2 µA (typ) | 2 µA (typ) | 2 µA (typ) | 2 µA (typ) | 2 µA (typ) |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| Reference Type | External | External | External | External | External | External |
| Approx. Price (qty 1) | $6.45 | $9.50 | $5.20 | $4.80 | $8.40 | $7.90 |
Bảo phân biệt quan trọng
- Pin-compatible across 9 SKUs spanning 8/10/12-bit resolution (vsMAX11128ATI+T (8-bit))
- True-differential track-and-hold with 1.5 MHz bandwidth (vsMAX11121ATI+T)
- Integrated 16-entry FIFO with SampleSet sequencer (vsMAX11123ATI+T (12-bit, 4-ch))
Ghi chú thiết kế
Place a 0.1 µF ceramic bypass capacitor as close as possible to AVDD (pin 11) and DVDD (pin 19), with a 10 µF tantalum or ceramic bulk capacitor on each supply rail. Separate analog and digital ground planes should join at a single point near the exposed pad. Use a ferrite bead or small inductor (10 µH) between the analog supply and digital supply sources to filter switching-noise coupling. Estimated: total quiescent current at 1 Msps continuous is 2.5 mA AVDD + 1 mA DVDD = 3.5 mA; ensure the LDO or DC-DC can deliver at least 5 mA with adequate headroom.
The 28-TQFN exposed pad (pin 29) MUST be soldered to the AGND plane for thermal dissipation. With theta_JA around 35 C/W on a standard 4-layer JEDEC test board, the junction temperature rise is approximately 1.0 C per 30 mW of internal dissipation. At 1 Msps continuous operation dissipating around 12 mW internally, expect less than 1 C temperature rise above ambient - well within the -40C to +125C automotive rating. Avoid placing the ADC near heat sources such as power inductors or MOSFETs.
Route the analog input traces (AIN0-AIN7) as short as possible and keep them away from digital switching traces (SCLK, DOUT, CS). Use a ground pour under the analog input traces to reduce capacitive coupling. The exposed pad should have thermal vias (typically 9 vias in a 3x3 array) connecting the top pad to internal ground planes for heat spreading. Place the external reference decoupling capacitor (10 µF) directly at the REF pin (pin 9) to minimize reference noise injection into conversions.
Do not exceed 3.6 V on AVDD or DVDD - absolute-maximum ratings are 4.0 V and latch-up may occur above this. The SHDN pin (pin 12) must be driven HIGH to enable conversions; leaving it floating may put the part in an indeterminate state. The CNVST pulse must be at least 5 ns wide and meet the t_CNVH setup time before SCLK toggling. Sampling rate above 1 Msps is not supported and degrades INL significantly. Do not apply analog inputs before AVDD is powered up; this can back-power the device through ESD diodes and corrupt the internal calibration.
Thông tin tuân thủ
RoHS compliant per Analog Devices product page. AEC-Q100 qualified for automotive applications per the automotive -40C to +125C temperature grade designation. Lead-free and halogen-free per datasheet materials declaration.
