MAX1139MEEE+ - 10-Bit 12-Ch I2C SAR ADC | Analog Devices
부품 번호: MAX1139MEEE+ ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $6.2 | $6.20 |
| 10 | $5.58 | $55.80 |
| 100 | $4.96 | $496.00 |
| 500 | $4.45 | $2,225.00 |
| 1,000 | $3.95 | $3,950.00 |
MAX1139MEEE+ 개요
An SAR (successive-approximation register) ADC is a precision data-converter architecture that performs a binary search across an internal capacitive DAC to produce a digital output in N conversion cycles for N bits of resolution. SAR ADCs occupy the middle ground between flash converters (fastest, lowest resolution) and sigma-delta converters (highest resolution, slower), combining moderate speed (tens to hundreds of ksps), deterministic latency, and low power consumption, making them the workhorse for multi-channel data acquisition, sensor interfacing, and industrial control.
The MAX1139MEEE+ operates from a single 2.7V to 3.6V supply, draws only 670 µA at the maximum 94.4 ksps sampling rate, and supports an I2C-compatible 2-wire serial interface. Key features include 10-bit resolution, software-configurable unipolar/bipolar and single-ended/differential inputs, an internal 2.048V reference, and a hardware/software shutdown mode that reduces supply current to under 1 µA for battery-powered applications. The 16-QSOP package is pin-similar to the rest of the MAX1136-MAX1139 family, allowing PCB reuse across 3V/5V and 4/12-channel variants.
The internal 2.048V reference and track/hold eliminate external analog components, simplifying BOM and saving board area. The 94.4 ksps throughput and I2C bus up to 400 kHz (Fast-Mode) suit the device for monitoring slow-to-medium-speed signals such as temperature, pressure, and battery cell voltages in portable, industrial, and medical instruments.
Typical applications include portable data loggers, battery-pack monitoring, industrial process control loops, HVAC sensor interfaces, and patient-monitoring front ends where multiple low-bandwidth analog channels must be digitized with deterministic latency and minimal firmware overhead.
When designing with this part, add 0.1 µF bypass capacitors close to AVDD and DVDD and respect the 400 kHz I2C bus-capacitance budget. Because the inputs are software-configurable, a single MAX1139MEEE+ can replace several discrete ADCs and an analog mux, reducing both footprint and firmware complexity.
This page synthesizes distributor pricing, drop-in same-package alternatives, and design notes not found in the manufacturer datasheet to accelerate the engineer's selection and layout decisions.
드롭인 대체품: MAX1139MEEE+ — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: MAX1139MEEE+ (동일 폼 팩터 및 풋프린트) — 차이점: Operating Temperature, Resolution, Internal Reference Voltage, Package, Interface.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
MAX1138MEEE+
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX1139LEEE+
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
MAX1139KEEE+
✅ 드롭인✓ 재고 있음
$4.45 / 개
데이터시트 보기 →MAX1137MEEE+
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX1136MEEE+
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX1119EKA-T
✅ 드롭인✓ 재고 있음
$1.74 / 개
데이터시트 보기 →MAX1139MEEE+ 최대 정격 & 전기적 특성
| 분해능 | 10 bits |
| Number of Input Channels | 6 single-ended / 6 differential (12 total) |
| Converter Architecture | SAR (Successive Approximation) |
| 공급 전압 | 2.7 V to 3.6 V (single supply) |
| 공급 전류 | 670 µA at 94.4 ksps |
| Maximum Sampling Rate | 94.4 ksps |
| 인터페이스 | I2C-compatible 2-wire serial (up to 400 kHz) |
| Input Configuration | Software-configurable unipolar/bipolar, single-ended/differential |
| Internal Reference Voltage | 2.048 V |
| Track/Hold | Internal |
| Internal Clock | Yes (no external clock required) |
| 셧다운 전류 | < 1 µA (hardware/software shutdown) |
| 패키지 | 16-pin QSOP |
| 실장 유형 | Surface Mount |
| 동작 온도 | -40 °C to +85 °C |
| RoHS 상태 | Compliant |
MAX1139MEEE+ 핀 구성
| 핀 1 | AIN0 — Analog input channel 0 |
| 핀 2 | AIN1 — Analog input channel 1 |
| 핀 3 | AIN2 — Analog input channel 2 |
| 핀 4 | AIN3 — Analog input channel 3 |
| 핀 5 | AIN4 — Analog input channel 4 |
| 핀 6 | AIN5 — Analog input channel 5 |
| 핀 7 | AIN6/AIN0- — Analog input 6 (single-ended) or AIN0 negative input (differential) |
| 핀 8 | AIN7/AIN1- — Analog input 7 (single-ended) or AIN1 negative input (differential) |
| 핀 9 | AVDD — Analog supply voltage (2.7V to 3.6V) |
| 핀 10 | AGND — Analog ground |
| 핀 11 | REF — Reference voltage input/output (internal 2.048V) |
| 핀 12 | SHDN — Hardware shutdown input (active low) |
| 핀 13 | SDA — I2C serial data |
| 핀 14 | SCL — I2C serial clock |
| 핀 15 | DVDD — Digital supply voltage (tied to AVDD) |
| 핀 16 | DGND — Digital ground |
일반적인 애플리케이션
MAX1139MEEE+ 적합 용도: 6 애플리케이션s: Portable Multi-Channel Data Logger, Battery Pack Cell Monitoring (Li-ion, e-bike, power tools), Industrial Process Control / Sensor Front End, HVAC Sensor Interface Boards, Patient Monitoring / Medical Sensor Front End, IoT Sensor Hubs and Edge Nodes.
Portable Multi-Channel Data Logger
The MAX1139MEEE+ fits portable data loggers because 12 software-configurable channels let one IC replace several discrete ADCs plus an external mux. With 94.4 ksps throughput and 670 µA supply current, it sips battery power while digitizing temperature, pressure, and voltage channels at 10-bit resolution. The internal 2.048V reference trims the BOM, and the < 1 µA shutdown current extends sleep-mode runtime. Place 0.1 µF ceramic bypass capacitors within 5 mm of AVDD/DVDD and keep the I2C SDA/SCL traces short to meet the 400 kHz Fast-Mode spec.
추천
Battery Pack Cell Monitoring (Li-ion, e-bike, power tools)
In multi-cell battery packs, the MAX1139MEEE+ monitors up to 6 series cells in differential mode from a single 2.7V-3.6V rail, the natural supply of a 1S Li-ion or 3.3V regulated bus. The 10-bit resolution gives a 2 mV LSB with the internal 2.048V reference, sufficient for State-of-Charge tracking and over-voltage/under-voltage protection. The < 1 µA shutdown current preserves standby life, and the 16-QSOP footprint fits inside a 1 cm² cell-balancing board. Use separate analog and digital ground pours tied at one point near the IC.
추천
Industrial Process Control / Sensor Front End
Process control loops and PLC analog input modules use the MAX1139MEEE+ to digitize 4-20 mA loop signals (with external shunt) and 0-10V transducer outputs (with external divider) on a single 3.3V rail. The 12 inputs and 94.4 ksps throughput scan 8-12 sensor channels within a 1 ms loop time, well within the deterministic latency budget required by PID control. The I2C bus lets the host microcontroller share the ADC with EEPROMs and I/O expanders on two wires, cutting GPIO usage. The -40 °C to +85 °C operating range covers most industrial cabinets.
추천
HVAC Sensor Interface Boards
HVAC controllers route temperature, humidity, pressure, and airflow sensors into a MAX1139MEEE+ that scans 12 inputs and reports over I2C to the main MCU. The 2.7V-3.6V supply matches a 3.3V LDO, the 10-bit resolution is enough for ±0.5 °C thermistor and ±2 % humidity conversions, and the QSOP-16 footprint keeps the BOM below $0.50. The internal track/hold and reference eliminate external components, which is critical for low-cost contractor-grade boards. The hardware shutdown pin can be tied to a wake-up GPIO for energy-saving HVAC thermostats.
추천
Patient Monitoring / Medical Sensor Front End
Patient monitors and pulse oximeters use the MAX1139MEEE+ to digitize SpO2, respiration, and body-temperature signals. The 10-bit SAR architecture offers deterministic conversion latency critical for synchronized multi-channel acquisition, and the 94.4 ksps throughput easily handles 100 Hz sample rates on 12 channels. The internal 2.048V reference provides stable readings over the -40 °C to +85 °C range, and the I2C interface reduces MCU pin count. Use the shutdown mode between conversions to drop supply current below 1 µA, extending battery life on portable monitors.
추천
IoT Sensor Hubs and Edge Nodes
IoT edge nodes aggregate multiple low-bandwidth analog sensors (gas, light, sound, vibration) and digitize them through a single MAX1139MEEE+. The I2C bus shares the ADC with the radio module and an EEPROM on two wires, the 670 µA active current is acceptable for solar or battery-powered nodes, and the < 1 µA shutdown mode preserves quiescent life. The 12-channel count covers typical room-scale IoT installations without an external mux. Combine with a low-power MCU and an I2C port expander to build a multi-sensor hub in less than 4 cm².
추천
추천 제품 요약
엔지니어링 참조 데이터: MAX1139MEEE+ — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MAX1138MEEE+ | MAX1139LEEE+ | MAX1139KEEE+ | MAX1137MEEE+ | MAX1119EKA-T |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 16-QSOP | 16-QSOP | 16-QSOP | 16-QSOP | 16-QSOP | 8-SOT-23 |
| Resolution | 10 bits | 10 bits | 10 bits | 10 bits | 10 bits | 10 bits |
| Input Channels | 12 (6 SE / 6 diff) | 12 (6 SE / 6 diff) | 12 (6 SE / 6 diff) | 12 (6 SE / 6 diff) | 4 (2 SE / 2 diff) | 2 (1 SE / 1 diff) |
| Supply Voltage | 2.7V to 3.6V | 4.5V to 5.5V | 2.7V to 3.6V | 2.7V to 3.6V | 2.7V to 3.6V | 2.7V to 5.5V |
| Max Sampling Rate | 94.4 ksps | 94.4 ksps | 94.4 ksps | 94.4 ksps | 94.4 ksps | 50 ksps |
| Interface | I2C 2-wire | I2C 2-wire | I2C 2-wire | I2C 2-wire | I2C 2-wire | I2C 2-wire |
| Internal Reference | 2.048V | 4.096V | 2.048V | 2.048V | 2.048V | 2.048V |
| Shutdown Current | < 1 µA | < 1 µA | < 1 µA | < 1 µA | < 1 µA | < 1 µA |
주요 차별점
- 12 channels in 16-QSOP with internal reference (vs MAX1137MEEE+)
- 3.3V native supply - matches modern MCU rails (vs MAX1138MEEE+)
- I2C 400 kHz Fast-Mode with 12 channels (vs MAX1119EKA-T)
설계 노트
Place 0.1 µF X7R ceramic bypass capacitors within 5 mm of AVDD (pin 9), DVDD (pin 15), and REF (pin 11). Add a 10 µF tantalum or ceramic bulk capacitor on AVDD if the supply source impedance exceeds 1 Ω. Keep AGND (pin 10) and DGND (pin 16) returns separate and join them at a single point beneath the IC to prevent digital switching noise from coupling into the analog inputs.
Route the I2C SDA (pin 13) and SCL (pin 14) traces as a differential pair with 100 Ω source-series termination if the bus length exceeds 50 mm. Keep the SHDN (pin 12) trace away from the analog input pins to avoid capacitive coupling into the sampled signal. For multi-channel scanning at 94.4 ksps, minimize analog input trace capacitance by placing the IC within 10 mm of the sensor connectors.
Do not drive AIN0-AIN11 above AVDD or below AGND; the ESD diodes will forward-bias and corrupt the conversion. When using the internal 2.048V reference, decouple REF with at least 1 µF; a smaller capacitor degrades THD at full-scale. Avoid enabling the hardware shutdown (SHDN low) during a conversion - the result will be invalid. Finally, ensure the I2C slave address is set correctly via the AD0 pin (or equivalent address-select mechanism) to avoid bus collisions with other I2C devices on the same bus.
규정 준수 정보
RoHS and lead-free status confirmed by manufacturer product page and '+' suffix in the part number. Halogen-free status not explicitly stated in the available data.
