MAX1037EKA+TG05 - 8-Bit 4-Ch I2C ADC SOT-23-8 | Maxim Integrated
MPN: MAX1037EKA+TG05 ✓ Hoạt độngMAX1037EKA+TG05 Tóm tắt
An analog-to-digital converter (ADC) is a data-acquisition building block that converts real-world analog signals into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Successive-approximation-register (SAR) ADCs like the MAX1037EKA+TG05 sit in the broader hierarchy of mixed-signal data converters, alongside delta-sigma, pipeline, and flash architectures. SAR ADCs are favored where low latency, moderate resolution (8-16 bits), and deterministic latency are required - making the MAX1037EKA+TG05 a representative part of the 8-bit, low-power, I2C-interfaced SAR family.
Key features of the MAX1037EKA+TG05 include 4 analog input channels (single-ended or pseudo-differential), 188 ksps maximum sampling rate, internal 4.096 V reference (MAX1036/MAX1038) or external reference option, 350 µA supply current at maximum throughput, and a 2-wire I2C-compatible serial interface supporting both 400 kHz Fast Mode and 1.7 MHz High-Speed Mode. The SOT-23-8 footprint occupies less than 9 mm² of board area, ideal for portable and space-constrained designs.
Architecturally, the MAX1037EKA+TG05 uses a charge-redistribution SAR core, an input multiplexer, an internal reference buffer, and an I2C/SMBus-compatible slave interface. The 1:1 input MUX:S/H:ADC ratio, single ADC, and selectable reference type (internal or external) allow designers to trade noise performance against input range flexibility on a per-channel basis.
Typical applications include portable instrumentation, battery-powered sensor monitoring, consumer-electronics front ends, industrial process-control signal conditioning, and any system requiring 4-12 channels of moderate-resolution digitization behind a low-pin-count I2C bus. The wide 2.7-5.5 V supply range also covers 3.3 V and 5 V rails common in MCU-based designs.
When designing with this ADC, place 0.1 µF decoupling capacitors as close as possible to the supply pin and follow Maxim's I2C bus-layout guidelines (4.7 kΩ pull-ups, ≤ 20 pF total bus capacitance in Fast Mode). For best noise performance, configure unused analog inputs as AIN_GND and avoid routing digital lines parallel to the analog inputs. The factory-custom +TG05 reel variant is best treated as a special-order item with non-cancellable/non-returnable terms.
Bộ thay thế dễ dàng lắp đặt cho MAX1037EKA+TG05 — 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 MAX1037EKA+TG05 (cùng hình factor và footprint) — khác nhau ở Number of Input Channels, Package, Resolution, Supply Voltage, Interface.
MAX1037EKA+G05
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1037EKA+T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1036EKA+TG002
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1036EKA+TG002
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MAX1038EKA+T
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MAX1037EKA+TG05 Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 8 bits |
| Number of Input Channels | 4 (single-ended) / up to 12 (family) |
| Tỷ lệ lấy mẫu | 188 ksps maximum |
| Điện áp cung cấp | 2.7 V to 5.5 V (single supply) |
| Điện áp cung cấp | 350 µA (typ at max throughput) |
| Giao diện | I2C-compatible 2-wire serial (400 kHz Fast / 1.7 MHz High-Speed) |
| Input Configuration | Multiplexed, single-ended or pseudo-differential |
| Reference | Internal 4.096 V (MAX1036/MAX1038) or external |
| Architecture | SAR (Successive Approximation Register) |
| Track/Hold | Internal |
| Hộp | SOT-23-8 (EKA) |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40 C to +85 C |
| MUX:S/H:ADC Ratio | 1:1:1 |
| Number of A/D Converters | 1 |
| Configuration | MUX-S/H-ADC |
| Trạng thái RoHS | Compliant |
| Reel Code | +TG05 (factory-custom reel/programmable configuration) |
Cấu hình chân MAX1037EKA+TG05
| Chân 1 | AIN0 — Analog input channel 0 |
| Chân 2 | AIN1/AIN2 — Analog input channel 1 (configurable) |
| Chân 3 | GND — Ground |
| Chân 4 | SDA — I2C serial data |
| Chân 5 | SCL — I2C serial clock |
| Chân 6 | AIN3 — Analog input channel 3 |
| Chân 7 | VDD — Power supply input |
| Chân 8 | AIN_REF — External reference voltage input |
Ứng dụng tiêu biểu
MAX1037EKA+TG05 phù hợp cho 6 Áp dụngs: Portable Battery-Powered Sensor Monitoring, Industrial Process-Control Signal Conditioning, Consumer Electronics Touch/Keypad Front End, Medical Patient Monitoring Accessories, Automotive Cabin Sensor Hub (Non-Safety), IoT Edge Node Analog Front End.
Portable Battery-Powered Sensor Monitoring
The MAX1037EKA+TG05 is well-suited for portable, battery-powered multi-sensor monitoring systems where 4 channels of 8-bit digitization and 350 µA supply current meet low-power design targets. The 2.7-5.5 V supply range covers single-cell Li-ion down to ~3 V without boost converters, while the integrated track/hold and external reference option allow designers to optimize the input range for thermocouple, thermistor, or 4-20 mA sensor front ends. Placed behind a low-power MCU on the I2C bus, the part adds only a few µA quiescent current and supports 1.7 MHz High-Speed Mode to keep bus transactions short, preserving sleep current. The SOT-23-8 footprint fits inside sealed sensor housings, and the -40 C to +85 C operating range supports outdoor and industrial deployments.
Được đề xuất
Industrial Process-Control Signal Conditioning
In industrial process-control panels the MAX1037EKA+TG05 digitizes 0-10 V or 4-20 mA loop signals behind an op-amp front end, providing 8-bit resolution at 188 ksps for closed-loop control loops. The pseudo-differential input mode supports ground-referenced measurements with up to ±VREF input range, while the I2C interface allows multiple ADC channels to share a single 2-wire bus with I/O expanders and EEPROMs. The 2.7-5.5 V supply accommodates 24 V industrial bus rails after regulation, and the SOT-23-8 package survives hand-soldered rework in field service scenarios. The wide operating temperature range and integrated track/hold eliminate the need for external sample-and-hold circuitry, reducing BOM cost and PCB area.
Được đề xuất
Consumer Electronics Touch/Keypad Front End
The MAX1037EKA+TG05 serves as a low-cost 4-channel touch-button or matrix-keypad analog front end in consumer appliances, converting capacitance-to-voltage signals from a simple RC network into 8-bit codes for the host MCU. The 188 ksps throughput supports real-time key-scan debouncing, while the SOT-23-8 package fits behind glass panels in microwave ovens, washing machines, and HVAC thermostats. Because the part is I2C-addressable, up to 8 MAX1037EKA+TG05 devices can share a single 2-wire bus, scaling to 32 input channels without additional GPIOs. The 2.7-5.5 V supply matches 3.3 V MCU rails directly, simplifying power-tree design.
Được đề xuất
Medical Patient Monitoring Accessories
In medical device accessories such as pulse-oximeter probes, digital thermometers, and wearable health patches, the MAX1037EKA+TG05 provides 4 channels of 8-bit ADC resolution for photodiode, thermistor, and battery-voltage monitoring. The 350 µA supply current and 2.7-5.5 V range are compatible with coin-cell and Li-ion battery stacks, and the SOT-23-8 footprint fits inside 10x10 mm accessory PCBs. The I2C interface allows the ADC to share a bus with a Bluetooth Low-SoC module, simplifying wireless health-monitor designs. Designers should note this part is not AEC-Q100 qualified; for FDA-regulated designs additional validation against IEC 60601-1 is required at the system level.
Được đề xuất
Automotive Cabin Sensor Hub (Non-Safety)
For non-safety automotive applications such as cabin climate control, seat-occupancy detection, and ambient-light sensing, the MAX1037EKA+TG05 provides a low-cost I2C ADC solution. The 4 single-ended input channels digitize thermistor, photodiode, and humidity-sensor signals, while the 1.7 MHz High-Speed Mode keeps bus bandwidth available for other body-network nodes. The -40 C to +85 C operating temperature range covers cabin environments, though the part is not AEC-Q100 qualified and must not be used in safety-critical ADAS or powertrain applications. For AEC-Q100-graded alternatives, designers should evaluate automotive-grade ADCs from other Maxim/ADI families.
Được đề xuất
IoT Edge Node Analog Front End
In IoT edge nodes, the MAX1037EKA+TG05 adds 4 channels of 8-bit digitization to a wireless SoC or low-power MCU at minimal cost and footprint. The 1.7 MHz High-Speed I2C Mode ensures the ADC read does not bottleneck radio or sensor-fusion tasks, while the wide 2.7-5.5 V supply supports direct connection to single-cell Li-ion or 2xAA battery stacks. The 350 µA active current is acceptable for duty-cycled sensor reads at 1 Hz, contributing negligibly to the average system power budget. The SOT-23-8 package is hand-solderable for prototypes and supports standard 8-pin reflow profiles for high-volume SMT assembly.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX1037EKA+TG05 — 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 | MAX1037EKA+G05 | MAX1037EKA+T | MAX1036EKA+TG002 | MAX1036EKA+T | MAX1038EKA+T |
|---|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | SOT-23-8 (EKA) | SOT-23-8 (EKA) - same | SOT-23-8 (EKA) - same | SOT-23-8 (EKA) - same | SOT-23-8 (EKA) - same | SOT-23-8 (EKA) - same |
| Resolution | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits | 8 bits |
| Input Channels | 4 | 4 | 4 | 4 | 4 | 12 |
| Sampling Rate | 188 ksps | 188 ksps | 188 ksps | 188 ksps | 188 ksps | 188 ksps |
| Internal Reference | No (external) | No (external) | No (external) | Yes (4.096 V) | Yes (4.096 V) | Yes (4.096 V) |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| I2C Speed | Up to 1.7 MHz | Up to 1.7 MHz | Up to 1.7 MHz | Up to 1.7 MHz | Up to 1.7 MHz | Up to 1.7 MHz |
| Reel Code / Order Suffix | +TG05 (custom) | +G05 | +T (standard 7-inch) | +TG002 | +T | +T |
Bảo phân biệt quan trọng
- True drop-in replacement of standard MAX1037EKA+ in same SOT-23-8 footprint (vsMAX1037EKA+T)
- Higher channel count available in same package (vsMAX1038EKA+T)
- External reference option for noise-optimized designs (vsMAX1036EKA+T)
- Smallest ADC with 188 ksps and I2C HS mode in SOT-23-8 (vsIndustry 8-bit ADCs in MSOP-8 / SOIC-8)
Ghi chú thiết kế
Place a 0.1 µF ceramic decoupling capacitor as close as possible to the VDD pin (Pin 7), with a 1 µF bulk capacitor on the same supply rail within 5 mm. The MAX1037EKA+TG05 draws 350 µA at maximum 188 ksps throughput, but quiescent current drops sharply between conversions. For battery-powered applications, duty-cycle the I2C reads to keep average consumption below 50 µA. Use a low-dropout regulator (e.g., MAX1725) or a simple LC filter to keep digital switching noise out of the analog supply, since the reference input is sensitive to high-frequency noise on VDD.
Route the SDA/SCL traces as a 4.7 kΩ pull-up bus to VDD, keeping total bus capacitance below 20 pF in Fast Mode (400 kHz) and below 50 pF in High-Speed Mode (1.7 MHz). Keep the analog input traces (AIN0-AIN3) short and away from digital switching lines, and surround the analog ground pin with a continuous ground plane. Place the external reference decoupling capacitor (typically 0.1 µF ceramic in parallel with 1-10 µF tantalum) within 2 mm of the AIN_REF pin to minimize reference noise pickup. Avoid routing the analog inputs parallel to the SCL clock line to prevent digital-coupling artifacts.
Do not assume the +TG05 suffix is a standard catalog part - it is a factory-custom reel configuration that may carry a non-cancellable/non-returnable (NCNR) policy. Designers should verify the configuration with Maxim/Analog Devices sales before placing volume orders. A common mistake is omitting the external reference on the MAX1037 (the part requires it; the MAX1036 and MAX1038 have internal references). Also, the I2C address is factory-set and varies across family members - confirm the 7-bit address in the datasheet before writing host firmware. For new designs, prefer the standard MAX1037EKA+T for shorter lead times.
When digitizing high-impedance sensor sources, add a buffer amplifier (e.g., MAX4475) between the sensor and the AINx input to prevent ADC input-current transients from distorting the measurement. The MAX1037EKA+TG05's input sampling capacitor is approximately 15-20 pF and requires a settling time of at least 100 ns after MUX switching. For AC-coupled inputs, add a 1 kΩ-100 kΩ series resistor and DC-bias network to keep the input within the common-mode range. Use the averaged-over-multiple-reads mode to improve effective resolution by ~1-2 bits when signal bandwidth allows.
Thông tin tuân thủ
RoHS compliant and lead-free per Maxim/Analog Devices product page. Not AEC-Q100 qualified - not suitable for automotive safety-critical applications. Halogen-free status not explicitly stated in the provided data.
