MAX1036EKA+G51 - 4/12-Ch 8-Bit I2C ADC, 5.5V | Maxim
料号： MAX1036EKA+G51 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.1 | $4.10 |
| 10 | $3.65 | $36.50 |
| 100 | $2.95 | $295.00 |
| 500 | $2.55 | $1,275.00 |
| 1,000 | $2.2 | $2,200.00 |
MAX1036EKA+G51 概述
An 8-bit ADC (analog-to-digital converter) is a data-acquisition building block that quantizes an analog input voltage into 256 discrete digital codes, forming the lowest-resolution tier of the successive-approximation (SAR) ADC family. Within the broader signal-chain hierarchy - sensor -> signal conditioning -> ADC -> digital processing - 8-bit SAR ADCs are typically deployed where compact size, low power, and modest precision are required (e.g., system monitoring, threshold detection, simple instrumentation). The MAX1036/MAX1038 family specifically adds an internal 4.096V reference and 4 or 12 analog input channels, which positions the MAX1036EKA+G51 as a space-saving, low-pin-count alternative to discrete ADC + external reference solutions.
Key features include a low supply current of approximately 350 uA at the maximum 225 ksps conversion rate, an internal 4.096V reference for the MAX1036 variant, software-configurable unipolar/bipolar input range, automatic channel scanning, and an I2C address that is hardware-selectable via an external resistor. The SOT23-8 package enables the part to fit next to sensors in tightly constrained PCB areas while still offering 12 single-ended or 6 differential input channels on the die (only AIN0-AIN3 are bonded out for the EKA/8-pin variant).
The internal architecture uses a successive-approximation register (SAR) core, an integrated input track/hold, an on-chip 4.096V bandgap reference, and a state machine that supports both single-ended and differential conversions with software-selectable unipolar/bipolar input ranges. The +G51 suffix is a Maxim tape-and-reel packaging code, not an electrical variant, so the silicon matches the standard MAX1036EKA.
Typical applications include portable/battery-powered sensor monitoring, system voltage and temperature supervision, panel-meter front-ends, and consumer-electronics housekeeping ADCs. The wide 2.7V-5.5V supply range allows the part to be powered directly from a single Li-ion cell, a 3.3V rail, or a 5V microcontroller supply without level shifters.
When laying out a board, place the 0.1 uF supply bypass capacitor as close as possible to the VDD pin and keep analog input traces short and guarded to minimize digital coupling. The internal reference requires a minimum 0.1 uF external bypass capacitor on REF for low-noise operation.
直接替换替代料： MAX1036EKA+G51 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
MAX1036EKA+T
✅ 直接替换📋 参考替代料（不在目录中）
MAX1036EKA+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1037EKA+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1039EKA+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1234EGI+
✅ 直接替换📋 参考替代料（不在目录中）
MAX1036EKA+G51 最大额定值与电气特性
| Part Number | MAX1036EKA+G51 |
| Manufacturer | Maxim Integrated (Analog Devices) |
| 功能 | 8-bit, 4-/12-channel ADC |
| Number of Channels | 4 (bonded out) / 12 (die) |
| 分辨率 | 8 bit |
| Conversion Rate (max) | 225 ksps |
| 电源电压 | 2.7 V to 5.5 V |
| 电源电流 | 350 uA (typ at full speed) |
| Internal Reference | 4.096 V |
| Serial Interface | I2C-compatible 2-wire |
| I2C Max Clock | 1.7 MHz (High-Speed Mode) |
| Input Configuration | Single-ended or differential, unipolar/bipolar |
| 封装 | SOT23-8 |
| 工作温度 | -40 C to +85 C |
| RoHS | Compliant |
MAX1036EKA+G51 引脚配置
| 引脚 1 | AIN0 — Analog input channel 0 |
| 引脚 2 | AIN1 — Analog input channel 1 |
| 引脚 3 | AIN2 — Analog input channel 2 |
| 引脚 4 | AIN3 — Analog input channel 3 |
| 引脚 5 | GND — Ground |
| 引脚 6 | REF — Reference bypass (internal 4.096V) |
| 引脚 7 | SDA — I2C data |
| 引脚 8 | SCL — I2C clock |
典型应用
MAX1036EKA+G51 适用于 6 应用s: Portable / Battery-Powered Sensor Monitoring, System Voltage and Temperature Supervision, Consumer Electronics Housekeeping ADC, Panel Meter / Front-Panel ADC Front-End, Industrial Sensor Digitizer (Factory / Process), Threshold / Alarm Detection Module.
Portable / Battery-Powered Sensor Monitoring
The MAX1036EKA+G51 fits portable sensor monitoring because its 2.7V-5.5V single-supply range allows direct connection to a single Li-ion cell or 3.3V rail, and its 350 uA typical supply current keeps drain low. Placed next to temperature, light, or pressure sensors with AIN0-AIN3 channels, it digitizes 4 single-ended inputs into 8-bit codes at up to 225 ksps for microcontroller-side processing. The 8-pin SOT23 footprint enables compact wearable and IoT sensor node designs.
推荐
System Voltage and Temperature Supervision
The MAX1036EKA+G51 is well suited to housekeeping tasks in embedded systems: the internal 4.096V reference gives a full-scale of 4.096V when VDD=5V, allowing direct monitoring of 3.3V and 5V rails via resistive dividers into AIN0-AIN3. Using the I2C interface at up to 1.7 MHz High-Speed Mode, the host MCU can poll the ADC quickly without tying up GPIO. Internal track/hold and on-chip clock remove the need for external analog components.
推荐
Consumer Electronics Housekeeping ADC
For consumer devices that need to monitor battery voltage, button feedback, and ambient conditions, the MAX1036EKA+G51 provides 4 single-ended or 2 differential input channels in a 5 mm2 SOT23-8 footprint. The I2C interface shares the bus with other peripherals, and software-configurable unipolar or bipolar input ranges make it adaptable to AC-rectified and DC-rail signals. Its 8-bit resolution is sufficient for threshold and indicator-style measurements, not high-fidelity audio.
推荐
Panel Meter / Front-Panel ADC Front-End
Front-panel digital meters and bench-top instruments can use the MAX1036EKA+G51 to digitize voltage, current, and auxiliary inputs before display. The 4 input channels are easily routed to a rotary switch or relay mux for multi-range measurement, and the I2C interface feeds the display controller with minimal wiring. The 4.096V internal reference scales directly to a 4.096V full-scale reading, simplifying display calibration firmware.
推荐
Industrial Sensor Digitizer (Factory / Process)
In factory and process instrumentation, the MAX1036EKA+G51 digitizes 4-20 mA loop-reconstructed voltages or thermocouple-amplified signals from a single 5V rail. The -40 C to +85 C operating range covers most indoor industrial environments, and the differential input mode rejects common-mode noise from long cable runs. I2C addressing via an external resistor allows multiple MAX1036/MAX1037/MAX1039 parts on the same bus for higher channel count systems.
推荐
Threshold / Alarm Detection Module
For alarm and threshold-detection modules (e.g., over-voltage, under-voltage, and level-sense indicators), the MAX1036EKA+G51's 8-bit quantization and 225 ksps throughput allow fast scanning of 4 critical rails. The integrated I2C interface eliminates the need for a dedicated ADC controller, and the small SOT23-8 footprint allows the module to be placed adjacent to the sense resistors. Using the MAX1036EKA+G51 in bipolar mode also enables AC-rectified mains monitoring in low-voltage signaling circuits.
推荐
推荐产品汇总
工程参考数据： MAX1036EKA+G51 ——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 | MAX1036EKA+T | MAX1036EKA+ | MAX1037EKA+ | MAX1039EKA+ | MAX1234EGI+ |
|---|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | SOT23-8 | SOT23-8 - same | SOT23-8 - same | SOT23-8 - same | SOT23-8 - same | SOT23-8 - same |
| Resolution | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit | 8 bit |
| Number of Input Channels (bonded out) | 4 | 4 | 4 | 4 | 4 | 4 |
| Supply Voltage | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V |
| Internal Reference | 4.096V | 4.096V | 4.096V | External | External | External |
| Serial Interface | I2C 2-wire | I2C 2-wire | I2C 2-wire | I2C 2-wire | I2C 2-wire | I2C 2-wire |
关键差异点
- Same silicon and pinout as MAX1036EKA+ with a Maxim +G51 reel-code designation （对比 MAX1036EKA+)
- Internal 4.096V reference eliminates external reference component （对比 MAX1037EKA+)
- 4 input channels bonded out vs 12 channels on MAX1038 QSOP （对比 MAX1038)
设计说明
Place a 0.1 uF ceramic bypass capacitor as close as possible to the VDD pin (SOT23-8 pin assignment) to suppress digital switching noise from coupling into the analog front-end. The internal 4.096V reference also requires a 0.1 uF external bypass on the REF pin; without it, conversion noise increases measurably. Estimated: at 225 ksps and 5V VDD, supply current is approximately 350 uA typical, so a small 0805 ceramic on VDD is sufficient.
Route analog input traces (AIN0-AIN3) over a continuous ground plane and away from the SDA/SCL switching traces to minimize digital-to-analog coupling. Use a guard trace tied to GND around each AIN line when the source impedance is above 1 kohm to limit crosstalk from the I2C bus. Keep the SOT23-8 thermal pad (if present) soldered to the ground pour for mechanical stability, though the device is not a power dissipator.
The MAX1036EKA+G51 supports both single-ended and differential conversions; in differential mode, the common-mode range is limited by the supply, and exceeding the absolute maximum input range can latch the device. For source impedances above 1 kohm, increase the acquisition time to allow the internal track/hold to settle, which the manufacturer datasheet describes in the I2C register map. Always perform a calibration conversion after power-up to null offset.
Do not confuse the +G51 suffix with an electrical variant - it is a Maxim tape-and-reel packaging code only; the silicon matches MAX1036EKA+. Multiple MAX1036/MAX1037/MAX1038/MAX1039 parts on the same I2C bus require distinct hardware addresses selected via an external resistor on the ADD pin; the datasheet lists 8 selectable addresses. If using the internal 4.096V reference and reading full-scale 5V signals, add an external resistive divider or use a 5V-tolerant input channel configuration to avoid saturating the ADC.
合规信息
RoHS and lead-free confirmed by Maxim/Analog Devices product page; halogen-free status not explicitly listed in the verified web data. AEC-Q100 not applicable for this consumer/industrial-grade part.
