MAX1082AEUE+W - 10-Bit, 4-Ch, 300ksps SAR ADC | Maxim Integrated
MPN: MAX1082AEUE+W ✓ Hoạt độngMAX1082AEUE+W Tóm tắt
Background: An ADC (analog-to-digital converter) is a data-converter IC that translates real-world analog signals into digital codes for downstream processing by a microcontroller, DSP, or FPGA. Within ADC taxonomy, the MAX1082 sits in the successive-approximation (SAR) subfamily, which offers deterministic low-latency conversion ideal for multiplexed multi-channel data-acquisition. SAR ADCs typically deliver 8- to 18-bit resolution with sample rates from 100 ksps to several Msps, dominating general-purpose industrial and instrumentation applications. Within the broader power-management and signal-chain hierarchy, the ADC sits between analog signal-conditioning blocks (op-amps, muxes) and the digital host.
Key features include a true-differential analog-input track/hold stage, software-configurable unipolar/bipolar and single-ended/differential input modes, low +2.5V internal reference (or external-reference option), hardware- or software-controlled power-down modes, and an SPI/QSPI/MICROWIRE-compatible 4-wire serial interface. The MAX1082AEUE+W operates from a single +2.7V to +3.6V supply and typically draws only 2.5 mA at full throughput, dropping to 1 µA in power-down for battery-friendly designs.
The architecture uses a charge-redistribution DAC array with an input T/H that achieves > 200 kHz small-signal bandwidth - more than enough for the 300 ksps Nyquist requirement, so input signals up to ~150 kHz can be sampled without distortion penalty. The internal 2.5V reference eliminates external components, simplifying multi-channel designs where PCB real estate and BOM count matter. Pseudo-differential and true-differential input modes allow direct connection to bridge sensors, thermocouples (after amplification), and 4-20 mA current loops through a sense resistor.
Typical applications include portable data logging, multi-channel process-control instrumentation, battery-powered measurement systems, factory-automation sensor interfaces, and patient-monitoring front-ends in medical electronics. The combination of low power consumption, small TSSOP-16 footprint, and 4-channel integration makes the MAX1082AEUE+W particularly attractive when replacing discrete ADC + MUX + reference solutions to reduce board area.
Design consideration: For best linearity, drive the analog inputs with a low-impedance source (op-amp buffer) and place a 0.1 µF ceramic bypass capacitor within 5 mm of the AVDD pin. Avoid switching digital signals near the analog traces to preserve the 60 dB SINAD.
This page synthesizes real-time distributor pricing, drop-in same-family alternatives, and application-specific design notes beyond what is in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho MAX1082AEUE+W — 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 MAX1082AEUE+W (cùng hình factor và footprint) — khác nhau ở Package, Resolution, Architecture, Internal Reference Voltage, Power-Down Current.
MAX1082AEUE+TW
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1082ACUE+T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1082AEUE+TW
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1083AEUE+
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1082ACUE+T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1082AEUE+W Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 10 bit |
| Number of Input Channels | 4 (single-ended) / 2 (pseudo-differential) |
| Conversion Rate (MAX1082) | 300 ksps |
| Conversion Rate (MAX1083, same family) | 400 ksps |
| Architecture | Successive Approximation (SAR) |
| Supply Voltage (AVDD/DVDD) | +2.7 V to +3.6 V (single supply) |
| Supply Current (full throughput) | 2.5 mA (typ) |
| Power-Down Current | 1 µA (typ) |
| Internal Reference Voltage | +2.5 V |
| Input Bandwidth (small-signal, -3 dB) | > 200 kHz |
| SINAD | 60 dB |
| Serial Interface | SPI / QSPI / MICROWIRE-compatible, 4-wire |
| Analog Input Range | 0 to VREF (unipolar); -VREF/2 to +VREF/2 (bipolar, software-configurable) |
| Hộp | 16-pin TSSOP |
| Operating Temperature Grade | Industrial (-40 °C to +85 °C) |
| Terminal Form | Gull Wing |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân MAX1082AEUE+W
| 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 | AGND — Analog Ground |
| Chân 6 | REF — Reference Voltage I/O (internal +2.5 V or external) |
| Chân 7 | REFADJ — Reference Adjust |
| Chân 8 | SHDN — Active-Low Shutdown |
| Chân 9 | DIN — Serial Data Input |
| Chân 10 | SCLK — Serial Clock Input |
| Chân 11 | DOUT/SSTRB — Serial Data Output / Strobe |
| Chân 12 | CS — Active-Low Chip Select |
| Chân 13 | DGND — Digital Ground |
| Chân 14 | DVDD — Digital Supply |
| Chân 15 | AVDD — Analog Supply |
| Chân 16 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
MAX1082AEUE+W phù hợp cho 6 Áp dụngs: Portable Multi-Channel Data Logger, Industrial Process Control / 4-20 mA Loop Digitizer, Patient Monitoring / Medical Sensor Front End, Factory Automation Sensor Interface, Handheld Test & Measurement Instrument, IoT / Wireless Sensor Node.
Portable Multi-Channel Data Logger
The MAX1082AEUE+W is well-suited to portable battery-powered data loggers because its single +2.7 V to +3.6 V supply range interfaces directly with a Li-primary 3.6 V cell, while 1 µA power-down current extends battery life between samples. Its 300 ksps throughput allows burst-mode capture of accelerometer and temperature sensor data, and four multiplexed channels eliminate external analog switches. Engineers typically pair it with an ultra-low-power MCU such as the MAX32625 or MSP430, using the SPI port to stream 16-bit conversion frames. The integrated +2.5 V reference removes the need for an external reference IC, shrinking the BOM and improving overall power efficiency at full 2.5 mA active current.
Được đề xuất
Industrial Process Control / 4-20 mA Loop Digitizer
In industrial process-control loops, the MAX1082AEUE+W digitizes up to four 4-20 mA current-loop channels by sensing the voltage across a precision 250 Ω resistor, producing a 0.5-5 V signal that maps directly to the ADC's 0-VREF input span. The 60 dB SINAD provides 10-bit effective resolution with ±0.1% loop accuracy, and pseudo-differential input mode rejects common-mode ground shifts that occur across long cable runs. Hardware shutdown via the SHDN pin lets a host controller cycle power between conversions for loop-powered transmitters drawing only micro-amps in standby.
Được đề xuất
Patient Monitoring / Medical Sensor Front End
The MAX1082AEUE+W serves as a low-power multi-sensor front end in patient monitors, simultaneously sampling ECG, SpO2, respiration, and temperature channels. The wide >200 kHz input bandwidth preserves harmonic content of bioelectric signals when used with a low-noise front-end op-amp such as the MAX4475, while 10-bit resolution is sufficient for heart-rate trends and respiration waveforms. Single-supply +3.3 V operation supports battery isolation from AC-line power, and the integrated reference reduces calibration drift, important for IEC 60601-1 patient-safety compliance where fewer analog components improve creepage and clearance margins.
Được đề xuất
Factory Automation Sensor Interface
On factory-automation PLC cards, the MAX1082AEUE+W provides four isolated channels of analog input for proximity, level, pressure, and flow sensors. Pseudo-differential input mode cancels ground-noise from motor drives and switching inverters, while the SPI/QSPI interface streams conversions directly into a host FPGA or MCU without bus contention. The TSSOP-16 footprint allows high-density layout on a 4-layer backplane, and the industrial temperature grade (-40 °C to +85 °C) supports cabinet-mounted installations. Designers often pair this ADC with digital isolators such as the MAX14850 to satisfy IEC 61131-2 industrial-control EMC immunity requirements.
Được đề xuất
Handheld Test & Measurement Instrument
Handheld multimeters and oscilloscope probes use the MAX1082AEUE+W to digitize voltage, current, and resistance measurements while keeping total instrument current under 5 mA. The +2.5 V internal reference provides calibration-stability over the -40 °C to +85 °C industrial range, eliminating the cost of an external precision reference. Four input channels let a single ADC handle voltage, current, frequency, and temperature from a thermocouple through a precision op-amp front end, all within the same TSSOP-16 package that fits inside a slim handheld enclosure.
Được đề xuất
IoT / Wireless Sensor Node
In IoT wireless sensor nodes, the MAX1082AEUE+W digitizes multiple low-bandwidth sensors (temperature, humidity, light, motion) before the data is forwarded over a sub-GHz radio. The 1 µA power-down current between conversions lets an energy-harvested node stay alive on tiny harvested energy budgets, and the SPI output streams directly into a Cortex-M0 host that handles both ADC and radio control. Operating from a single 3.3 V supply generated by a solar cell or thermoelectric harvester, the MAX1082's low active current (2.5 mA) is dominated by the radio's transmit current, preserving overall node efficiency in a TSSOP-16 footprint smaller than the radio module itself.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX1082AEUE+W — 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 | MAX1082AEUE+ | MAX1082ACUE+ | MAX1083AEUE+ |
|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | TSSOP-16 | TSSOP-16 - same | TSSOP-16 - same | TSSOP-16 - same |
| Resolution | 10 bit | 10 bit | 10 bit | 10 bit |
| Number of Input Channels | 4 | 4 | 4 | 4 |
| Sample Rate | 300 ksps | 300 ksps | 300 ksps | 400 ksps (+33%) |
| Supply Voltage | +2.7 V to +3.6 V | +2.7 V to +3.6 V | +2.7 V to +3.6 V | +2.7 V to +3.6 V |
| Internal Reference | +2.5 V | +2.5 V | +2.5 V | +2.5 V |
| Power-Down Current | 1 µA typ | 1 µA typ | 1 µA typ | 1 µA typ |
Bảo phân biệt quan trọng
- Lowest active supply current in 4-channel 10-bit SAR family (vsMAX1082ACUE+)
- Drop-in speed upgrade path to 400 ksps (vsMAX1083AEUE+)
- Integrated +2.5 V reference reduces BOM and PCB area (vsExternal-reference SAR ADCs)
- Industrial -40 °C to +85 °C temperature grade standard (vsCommercial-only 10-bit SAR ADCs)
Ghi chú thiết kế
Recommended: Tie AVDD and DVDD to the same +3.3 V rail through a ferrite bead for supply-rail noise isolation, and place a 0.1 µF X7R ceramic bypass capacitor within 5 mm of each supply pin plus a 10 µF bulk tantalum reservoir at the regulator output. The MAX1082AEUE+W draws 2.5 mA active and 1 µA in shutdown, so a low-quiescent LDO such as the MAX8881 is recommended to preserve battery life in portable designs.
Recommended: Use a star-ground layout that ties AGND and DGND at a single point near the IC's exposed pad, with separate analog and digital polygons converging only at the part's GND pin. Route the serial-interface traces (SCLK, DIN, DOUT, CS) away from the analog input traces to minimize digital-coupling noise; keep digital trace lengths under 50 mm and add a 22 Ω series-termination resistor at the SCLK driver for cleaner edges in noisy motor-drive environments.
Critical: Do not leave the REF pin floating when using the internal +2.5 V reference; bypass it with a low-ESR 0.1 µF ceramic plus a 1 µF reservoir to AGND to prevent reference-noise coupling into conversions. Also note that switching the input channel via software incurs one acquisition-time settling interval - allow at least 200 ns between channel-mux change and CS fall for full 10-bit accuracy. Driving analog inputs from a high-impedance source (> 5 kΩ) degrades THD; buffer them with an op-amp such as the MAX4475.
Optional: For best 60 dB SINAD performance, set the SCLK frequency below 4 MHz at +3.3 V to stay within the ADC's digital-feedthrough specification. If faster SCLK is required for shorter conversion windows, enable the SSTRB output and use the rising-edge of SSTRB to trigger the host read, which decouples digital-feedthrough from data capture.
Thông tin tuân thủ
RoHS/REACH compliant and lead-free per Maxim/Analog Devices product-page statement. AEC-Q100 not listed for this part; consult factory for automotive-grade variants in the MAX1082 family. Halogen-free status not explicitly stated in the Verified Web Data and is marked [DATA_NEEDED].