MAX1037EKA+TG05 - 8-Bit 4-Ch I2C ADC SOT-23-8 | Maxim Integrated
料号： MAX1037EKA+TG05 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.65 | $26.50 |
| 100 | $2.3 | $230.00 |
| 500 | $1.98 | $990.00 |
| 1,000 | $1.72 | $1,720.00 |
MAX1037EKA+TG05 概述
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.
直接替换替代料： MAX1037EKA+TG05 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MAX1037EKA+TG05 （相同外形与封装尺寸） ——差异在于 Number of Input Channels, Package, Resolution, Supply Voltage, Interface.
快速对比工具——选择替代料号进行并排对比：
MAX1037EKA+G05
✅ 直接替换✓ 有现货
$2.8 / 个
查看数据手册 →MAX1037EKA+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX1036EKA+TG002
✅ 直接替换✓ 有现货
$2.55 / 个
查看数据手册 →MAX1036EKA+TG002
✅ 直接替换✓ 有现货
$2.55 / 个
查看数据手册 →MAX1038EKA+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX1037EKA+TG05 最大额定值与电气特性
| 分辨率 | 8 bits |
| Number of Input Channels | 4 (single-ended) / up to 12 (family) |
| 采样率 | 188 ksps maximum |
| 电源电压 | 2.7 V to 5.5 V (single supply) |
| 电源电流 | 350 µA (typ at max throughput) |
| 接口 | 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 |
| 封装 | SOT-23-8 (EKA) |
| 安装类型 | Surface Mount |
| 工作温度 | -40 C to +85 C |
| MUX:S/H:ADC Ratio | 1:1:1 |
| Number of A/D Converters | 1 |
| Configuration | MUX-S/H-ADC |
| RoHS 状态 | Compliant |
| Reel Code | +TG05 (factory-custom reel/programmable configuration) |
MAX1037EKA+TG05 引脚配置
| 引脚 1 | AIN0 — Analog input channel 0 |
| 引脚 2 | AIN1/AIN2 — Analog input channel 1 (configurable) |
| 引脚 3 | GND — Ground |
| 引脚 4 | SDA — I2C serial data |
| 引脚 5 | SCL — I2C serial clock |
| 引脚 6 | AIN3 — Analog input channel 3 |
| 引脚 7 | VDD — Power supply input |
| 引脚 8 | AIN_REF — External reference voltage input |
典型应用
MAX1037EKA+TG05 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： MAX1037EKA+TG05 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- True drop-in replacement of standard MAX1037EKA+ in same SOT-23-8 footprint （对比 MAX1037EKA+T)
- Higher channel count available in same package （对比 MAX1038EKA+T)
- External reference option for noise-optimized designs （对比 MAX1036EKA+T)
- Smallest ADC with 188 ksps and I2C HS mode in SOT-23-8 （对比 Industry 8-bit ADCs in MSOP-8 / SOIC-8)
设计说明
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.
合规信息
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.
