MAX1396EUB+T - 12-Bit 312.5ksps SAR ADC | Maxim Integrated
MPN： MAX1396EUB+T ✓ 啟用中MAX1396EUB+T 概覽
A SAR ADC is a type of analog-to-digital converter that uses a binary-search algorithm against an internal precision DAC to digitize an analog input in N conversion cycles for N-bit resolution. SAR ADCs are valued for low latency, deterministic throughput, and lack of pipeline delay - qualities that distinguish them from sigma-delta ADCs (which trade speed for higher resolution through oversampling) and from flash ADCs (which trade resolution for raw speed). The MAX1396 sits in the SAR family -> ADC -> data converter -> signal chain IC -> semiconductor hierarchy.
Key specifications include 312.5 ksps maximum sampling rate, true-differential or dual single-ended input multiplexer (CH0/CH1), an SPI/QSPI/MICROWIRE-compatible serial interface, on-chip track-and-hold, and an internal 2.5V reference. The MAX1396 also integrates a low-power shutdown mode that drops quiescent current to sub-microamp levels for power-constrained applications. The µMAX-10 footprint measures approximately 3.0 mm x 3.0 mm and offers superior thermal and electrical performance over equivalent SO-10 alternatives in handheld designs. Internal calibration and a high-impedance input structure simplify front-end signal conditioning.
Typical applications include portable data loggers, handheld multimeters, 4-20 mA loop-powered sensors, battery monitoring systems, isolated sensor front ends, and patient-monitoring bedside devices. The 1.5V minimum supply makes it suitable for single-cell alkaline or NiMH-powered products where the ADC can run directly from a declining battery without a boost converter.
When designing with the MAX1396, place a 0.1 µF decoupling capacitor within 5 mm of the VDD pin and keep analog input traces short and guarded to preserve the 12-bit accuracy. The internal reference requires a 1 µF external bypass capacitor for specified noise performance. Always observe the absolute maximum analog input range of VDD + 0.3V to avoid latch-up.
This page consolidates distributor pricing, verified drop-in alternatives from the same Maxim/ADI family, and practical SAR-ADC layout notes not collected in the original datasheet.
直接替換替代品，適用於 MAX1396EUB+T — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MAX1396EUB+T （相同外形與佔位） — 差異在於 Package, Number of Channels, Resolution, Architecture, Interface.
MAX1393EUB+T
✅ 直接替換📋 參考替代品（不在目錄中）
MAX1396MUB+T
✅ 直接替換聯絡詢價
查看資料表 →MAX1396EUB+T
✅ 直接替換聯絡詢價
查看資料表 →MAX1363MEUB+
✅ 直接替換聯絡詢價
查看資料表 →MAX1364MEUB+
✅ 直接替換聯絡詢價
查看資料表 →MAX1396EUB+T 最大額定值與電氣特性
| 解析度 | 12 bits |
| Architecture | SAR (Successive Approximation Register) |
| Number of Channels | 1 differential / 2 single-ended (pin-selectable) |
| 取樣率 | 312.5 ksps |
| 供應電壓 | 1.5 V to 3.6 V (single supply) |
| Input Type | True differential or single-ended |
| 輸入電壓範圍 | 0 V to VREF (single-ended); ±VREF (differential) |
| Internal Reference | 2.5 V |
| External Reference Support | Yes |
| 介面 | SPI / QSPI / MICROWIRE-compatible serial |
| 封裝 | 10-pin µMAX (U10-1) |
| 工作溫度 | -40 C to +85 C (industrial) |
| 安裝類型 | Surface Mount |
| MSL 等級 | 1 |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
MAX1396EUB+T 腳位配置
| 腳位 1 | VDD — Positive supply voltage (1.5V to 3.6V) |
| 腳位 2 | AIN+ — Positive analog input |
| 腳位 3 | AIN- — Negative analog input (or CH1 single-ended) |
| 腳位 4 | REF — Reference bypass (internal 2.5V or external reference input) |
| 腳位 5 | GND — Ground |
| 腳位 6 | CS — Chip select, active low |
| 腳位 7 | SCLK — Serial clock input |
| 腳位 8 | DOUT — Serial data output |
| 腳位 9 | SHDN — Shutdown, active low |
| 腳位 10 | DRDY — Data ready output |
典型應用
MAX1396EUB+T 適用於 6 應用s: Portable Battery-Powered Data Loggers, Industrial 4-20 mA Loop-Powered Sensor Front Ends, Handheld Digital Multimeters (DMMs), Medical Patient Monitoring (Bedside), Battery Monitoring and Fuel Gauging, Isolated Sensor Interface Modules.
Portable Battery-Powered Data Loggers
The MAX1396EUB+T is well matched to portable battery data loggers because its 1.5 V minimum supply allows direct connection to a single alkaline or NiMH cell without an LDO. The 312.5 ksps sampling rate supports temperature, pressure, and voltage logging at sub-second intervals, while the internal 2.5 V reference and µMAX-10 footprint minimize BOM count for compact handheld enclosures. In a typical logger, the ADC digitizes a sensor bridge or thermistor voltage once per second, achieving weeks of runtime from a single AA cell when duty-cycled via SHDN. The low shutdown current (<1 µA) makes duty cycling practical, and the SPI-compatible interface streams data directly to a low-power MCU.
推薦
Industrial 4-20 mA Loop-Powered Sensor Front Ends
The MAX1396EUB+T fits 4-20 mA loop-powered sensor front ends where the ADC must digitize a process signal while drawing minimal current from the loop supply. Its 1.5-3.6 V single-supply operation matches the loop compliance voltage after a current-sense shunt, and its 312.5 ksps throughput handles hundreds of samples per second for process control loops. The differential input mode rejects common-mode noise from long cable runs in factory environments, while the µMAX-10 package keeps the front-end compact inside sensor heads. Combined with a current-loop protector and instrumentation front end, the MAX1396 enables loop-powered transmitters drawing less than 3.5 mA total.
推薦
Handheld Digital Multimeters (DMMs)
The MAX1396EUB+T is well suited to handheld DMM designs because the 12-bit resolution supports 4000-count display accuracy while the 312.5 ksps sampling rate handles autoranging transitions without visible lag. Its single-channel differential mode simplifies the voltage/current measurement mux, and the SPI output streams digitized samples directly to the meter's microcontroller. The µMAX-10 package occupies less than 9 mm² of PCB, leaving room for the display driver, protection circuits, and battery compartment. The low 1.5 V supply operation extends battery life on the typical 9 V cell via an LDO to 3.3 V.
推薦
Medical Patient Monitoring (Bedside)
The MAX1396EUB+T enables compact bedside patient-monitoring front ends that digitize ECG, SpO2, or temperature signals with 12-bit accuracy. Its 312.5 ksps throughput oversamples the ECG bandwidth (typically 150 Hz) by 100x for noise reduction, while the differential input mode rejects mains hum common-mode noise. The 1.5 V supply operation supports isolated, low-voltage patient-connected circuits meeting IEC 60601-1 patient leakage requirements. The SPI output allows galvanic isolation via digital isolators, preserving patient safety while streaming data to the host processor.
推薦
Battery Monitoring and Fuel Gauging
The MAX1396EUB+T is appropriate for battery monitoring and fuel-gauging applications because its 1.5-3.6 V supply accepts 1S Li-ion, 2-3 cell alkaline packs, and supercapacitor banks directly. The 12-bit resolution provides accurate coulomb-counting current sensing, while the 312.5 ksps throughput handles transient load steps in power tools and consumer electronics. The internal 2.5 V reference is stable enough for state-of-charge estimation, and the µMAX-10 package fits inside small BMS modules. The shutdown mode (<1 µA) prevents the monitoring circuit from draining the battery when the system is off.
推薦
Isolated Sensor Interface Modules
The MAX1396EUB+T suits isolated sensor interface modules because its SPI output can be passed through a digital isolator (such as an ADuM1411) to maintain galvanic isolation across high-voltage safety barriers. The 1.5 V supply runs from the isolated side, and the 312.5 ksps throughput supports high-bandwidth sensors like strain gauges and pressure transducers in industrial settings. The differential input mode rejects ground potential differences across the isolation barrier, and the µMAX-10 footprint keeps the isolated front end compact for DIN-rail and PCB-mount modules.
推薦
推薦產品摘要
工程參考資料，適用於 MAX1396EUB+T — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MAX1393EUB+T | MAX1396MUB+T | MAX1363MEUB+ | MAX1364MEUB+ |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 10-pin µMAX (U10-1) | 10-pin µMAX (U10-1) - same | 10-pin µMAX (U10-1) - same | 10-pin µMAX - same | 10-pin µMAX - same |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Architecture | SAR | SAR | SAR | Sigma-Delta | Sigma-Delta |
| Supply Voltage | 1.5 V to 3.6 V | 1.5 V to 3.6 V | 1.5 V to 3.6 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Channels | 1 diff / 2 SE | 1 diff / 2 SE | 1 diff / 2 SE | 2 diff / 4 SE | 2 diff / 4 SE |
| Internal Reference | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V |
| Shutdown Mode | Yes (SHDN pin) | Yes | Yes | Yes | Yes |
主要差異化特點
- Lowest minimum supply voltage in the MAX13xx family (對比MAX1363MEUB+)
- Pin-selectable differential or single-ended inputs (對比MAX1363MEUB+)
- True SAR architecture with deterministic latency (對比MAX1364MEUB+)
- Industry-standard SPI-compatible serial interface (對比MAX1396MTB+T)
設計說明
Place a 0.1 µF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 1) and a 1 µF ceramic bypass capacitor on the REF pin (pin 4) to stabilize the internal 2.5 V reference. The reference bypass capacitor must have low leakage (C0G/NP0 dielectric preferred) to avoid degrading the 12-bit linearity. For battery-powered designs, drive the SHDN pin low between conversions to drop quiescent current to less than 1 µA.
Route analog input traces (AIN+, AIN-) as a guarded differential pair with a ground trace between them to reject common-mode noise. Keep analog input traces short, away from switching nodes (DC-DC converters, digital clocks), and surround them with a continuous ground pour. Place the reference bypass capacitor directly at the REF pin, and avoid running digital signals (SCLK, CS, DOUT) directly under the analog input traces or over the reference bypass capacitor.
Do not exceed the absolute maximum analog input voltage of VDD + 0.3 V or below VSS - 0.3 V - latch-up can occur and permanently damage the device. The SHDN pin must be driven to a logic high for normal operation; leaving it floating may cause unpredictable behavior. The internal reference requires at least 1 ms to settle after power-up before initiating conversions, otherwise first readings will be inaccurate. When using the SPI interface, ensure CPOL/CPHA match between the MAX1396 and the host MCU to avoid reading shifted bit patterns.
For best 12-bit accuracy, source-impedance on the analog inputs should be below 5 kΩ to allow the internal track-and-hold to settle within the acquisition window. Higher source impedances require a longer acquisition time or a front-end buffer (such as a MAX4165 op-amp). The differential input mode rejects common-mode noise, but the absolute common-mode voltage must remain within the supply rails (0 V to VDD) for proper operation.
合規資訊
RoHS compliant per Maxim Integrated/Analog Devices product page. Lead-free µMAX-10 package. Industrial temperature grade (-40C to +85C); not AEC-Q100 qualified for automotive.
