MAX11101PMB# - 14-Bit 200ksps +5V SAR ADC | Maxim Integrated
料号： MAX11101PMB# ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.18 | $6.18 |
| 10 | $5.49 | $54.90 |
| 100 | $4.42 | $442.00 |
| 500 | $3.78 | $1,890.00 |
| 1,000 | $3.1 | $3,100.00 |
MAX11101PMB# 概述
A SAR ADC is a successive-approximation-register analog-to-digital converter - a type of data converter that uses a binary-search algorithm against an internal precision DAC to digitize an analog input in N clock cycles, where N is the resolution (14 cycles for this part). SAR ADCs occupy a middle position in the converter hierarchy: flash ADC > pipeline ADC > SAR ADC > integrating ADC. They deliver deterministic latency, low power, and excellent DC accuracy at moderate sampling rates (tens of ksps to a few Msps), making them the workhorse of industrial data-acquisition, sensor read-out, and battery-powered instrumentation.
Key features include ±1 LSB INL and DNL (max), a true-differential analog input structure, an internal 4.096V reference, and an automatic power-down mode that drops supply current to 10uA between conversions. The device operates from a single +5V analog supply with a separate +2.7V to +5.25V digital supply rail, simplifying interface to 3.3V microcontrollers. An on-chip oscillator eliminates the need for an external clock.
The MAX11101 uses a charge-redistribution DAC architecture combined with a high-precision comparator and successive-approximation register. The internal 4.096V bandgap reference is laser-trimmed for low drift, while the input track-and-hold accepts full-scale inputs up to VREF without code-dependent distortion. The serial interface supports up to 40 MHz SCLK rates and can stream 200 ksps continuously.
Typical applications include portable instrumentation and battery-powered data loggers, industrial process-control analog input modules, medical sensor signal conditioning, and 4-20mA loop-powered transmitters. The 10uA shutdown mode extends battery life in duty-cycled applications where conversions occur only a few times per second.
When designing with the MAX11101PMB#, place the 0.1uF and 10uF decoupling capacitors as close as possible to the AVDD and DVDD pins. Use a star-ground topology to keep digital return currents away from the analog input trace. The reference bypass capacitor (1uF minimum) is critical for AC performance and should be placed adjacent to the REF pin.
This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical PCB layout guidance that go beyond the bare datasheet specifications - including thermal derating, reflow-profile MSL handling, and cross-brand substitution strategy.
直接替换替代料： MAX11101PMB# ——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：
MAX11100PMB#
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX11102PMB#
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX11106PMB#
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX11103PMB#
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX11101PMB# 最大额定值与电气特性
| 分辨率 | 14 bit |
| Sample Rate | 200 ksps |
| Number of Channels | 1 single-ended input |
| Architecture | SAR (Successive Approximation Register) |
| Analog Supply Voltage | 4.75 V to 5.25 V |
| Digital Supply Voltage | 2.7 V to 5.25 V |
| Input Type | Single-Ended |
| INL（积分非线性） | +/-1 LSB (max) |
| DNL (Differential Nonlinearity) | +/-1 LSB (max) |
| Internal Reference Voltage | 4.096 V |
| 关断电流 | 10 uA |
| 工作温度 | -40 C to +85 C |
| 封装 | 12-pin TDFN-EP 3 mm x 3 mm |
| 接口 | SPI/QSPI/MICROWIRE-compatible serial |
| RoHS 状态 | ROHS3 Compliant |
| Data Interface | SPI |
MAX11101PMB# 引脚配置
| 引脚 1 | AVDD — Analog power supply input, +4.75V to +5.25V; bypass with 0.1uF and 10uF capacitors to AGND |
| 引脚 2 | REF — Internal 4.096V reference output; bypass with 1uF minimum capacitor to AGND |
| 引脚 3 | AIN — Analog input channel 1, single-ended; input range 0V to VREF |
| 引脚 4 | AGND — Analog ground return for AVDD, REF, and AIN |
| 引脚 5 | DGND — Digital ground return for serial interface and DVDD |
| 引脚 6 | DOUT — Serial data output; outputs MSB-first 14-bit conversion result |
| 引脚 7 | SSTRB — Serial strobe output; goes low to indicate conversion complete, data ready |
| 引脚 8 | CS — Active-low chip select input for SPI interface |
| 引脚 9 | SCLK — Serial clock input; up to 40 MHz, SPI-compatible |
| 引脚 10 | DVDD — Digital power supply input, +2.7V to +5.25V; bypass with 0.1uF capacitor to DGND |
| 引脚 11 | DGND — Digital ground (tied to pin 5) |
| 引脚 12 | EP — Exposed pad; must be soldered to AGND plane for thermal and electrical performance |
典型应用
MAX11101PMB# 适用于 6 应用s: Portable Instrumentation and Data Loggers, Industrial Process Control Analog Input Modules, Medical Sensor Signal Conditioning, 4-20 mA Loop-Powered Transmitters, Battery-Powered Environmental Monitoring, Automotive Sensor Interface Modules.
Portable Instrumentation and Data Loggers
The MAX11101PMB# fits portable instrumentation and handheld data loggers because its 10uA automatic shutdown current extends battery life dramatically between conversions, while its 14-bit resolution captures sensor signals with sufficient accuracy for environmental and industrial telemetry. The single-ended 0V to 4.096V input range, paired with the internal 4.096V reference, provides a calibrated full-scale input directly compatible with thermocouple amplifiers, bridge sensors, and pH probe front-ends after signal conditioning. At 200 ksps, the ADC can sample a multiplexed sensor array at rates far exceeding typical log bandwidths of a few hundred Hz, leaving plenty of oversampling headroom for digital filtering. The 12-pin TDFN-EP 3 mm x 3 mm package occupies minimal PCB area - critical for handheld form factors - and the SPI-compatible serial interface minimizes microcontroller GPIO consumption compared to parallel-output ADCs.
推荐
Industrial Process Control Analog Input Modules
The MAX11101PMB# is ideal for industrial process-control analog input modules that digitize 4-20 mA loop signals, RTD outputs, and 0-10V process variables. Its +/-1 LSB INL and DNL ensure conversion accuracy better than 0.024% of full scale (1 LSB / 16384), well within the 0.1% tolerance required by most PLC analog input modules. The 200 ksps throughput allows simultaneous sampling of multiple channels through an external mux, while the 5V analog supply rail shares the same source as the loop-powered transmitter. Per the Maxim datasheet 19-6047, the +5V AVDD operation directly interfaces to legacy industrial +/-15V systems with simple resistor dividers. The exposed-pad TDFN-EP package provides solid thermal performance in sealed IP65 module enclosures, and the SPI/QSPI interface drops cleanly into ARM Cortex-M0 industrial MCUs.
推荐
Medical Sensor Signal Conditioning
The MAX11101PMB# suits medical sensor signal conditioning boards for portable patient monitors, pulse oximeters, and glucose meters where the 14-bit resolution quantizes bioelectric signals with adequate dynamic range. The internal 4.096V reference provides 250 uV per LSB - finer than the typical 1 mV resolution required for ECG and EMG front-ends - while the 10uA shutdown current preserves battery life across multi-day patient monitoring sessions. The SPI interface allows direct connection to low-power medical MCUs without external logic. The single 5V supply rail is compatible with medical-grade isolated DC-DC converters. Per the Maxim datasheet 19-6047, the part's low aperture delay and deterministic SAR latency simplify medical timing chains that require fixed sample intervals for spectral analysis of heart-rate variability.
推荐
4-20 mA Loop-Powered Transmitters
The MAX11101PMB# enables smart 4-20 mA loop-powered transmitters that digitize sensor signals and transmit them over the same two-wire loop used for power. Its low 2.5 mA active supply current leaves substantial headroom within the 4 mA loop minimum, and the 10uA shutdown mode reduces quiescent draw to imperceptible levels during long idle periods between transmissions. The 14-bit resolution quantizes the full 4-20 mA range with 1 uA per LSB - enough granularity to convey pressure, flow, and temperature measurements to within 0.01% of span. Per the Maxim datasheet 19-6047, the 5V AVDD rail is easily derived from the 4 mA loop minimum via a low-dropout regulator. The 12-pin TDFN-EP package supports compact field-mount instrument enclosures, while the SPI interface integrates seamlessly with low-power Cortex-M0 industrial MCUs.
推荐
Battery-Powered Environmental Monitoring
The MAX11101PMB# excels in battery-powered environmental monitoring stations that measure air quality, soil moisture, and weather parameters for months without battery replacement. The 10uA automatic shutdown feature reduces average supply current to single-digit microamps in duty-cycled applications where conversions happen once per second or once per minute. The 14-bit resolution and +/-1 LSB linearity accurately digitize sensor outputs from electrochemical gas sensors, capacitive humidity probes, and resistive soil moisture bridges. Per the Maxim datasheet 19-6047, the wide +2.7V to +5.25V digital supply range supports direct connection to Li-ion, alkaline, and solar-charged battery stacks without level shifting. The small 12-pin TDFN-EP 3 mm x 3 mm footprint fits inside sealed IP67 weatherproof enclosures typical of remote field deployments.
推荐
Automotive Sensor Interface Modules
The MAX11101PMB# (industrial grade, -40C to +85C) suits non-safety automotive sensor interface modules such as body controllers, climate-control head units, and aftermarket telemetry sensors where 14-bit resolution digitizes analog sensor outputs from NTC thermistors, fuel-level senders, and pressure transducers. The 200 ksps sample rate easily handles the multiplexed inputs of multi-zone climate systems with ample oversampling for digital filtering. Per the Maxim datasheet 19-6047, the wide +2.7V to +5.25V digital supply rail interfaces directly to 3.3V automotive MCUs, and the 5V analog supply is conveniently derived from the 12V automotive bus via a linear regulator. The 12-pin TDFN-EP package withstands automotive underhood thermal cycling when properly soldered with EP connected to AGND for thermal dissipation. Note that for safety-critical ADAS applications, AEC-Q100-qualified variants are required.
推荐
推荐产品汇总
工程参考数据： MAX11101PMB# ——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 | MAX11100PMB# | MAX11102PMB# | MAX11106PMB# | MAX11103PMB# | AD7276BRMZ |
|---|---|---|---|---|---|---|
| Package | 12-pin TDFN-EP 3x3 mm | 12-pin TDFN-EP 3x3 mm - same | 12-pin TDFN-EP 3x3 mm - same | 12-pin TDFN-EP 3x3 mm - same | 12-pin TDFN-EP 3x3 mm - same | MSOP-8 - different |
| Brand | Maxim Integrated (now Analog Devices) | Maxim Integrated - same | Maxim Integrated - same | Maxim Integrated - same | Maxim Integrated - same | Analog Devices - different |
| Resolution | 14 bit | 14 bit | 14 bit | 14 bit | 14 bit | 12 bit |
| Sample Rate | 200 ksps | 100 ksps | 200 ksps | 500 ksps | 125 ksps | 3 Msps |
| Input Channels | 1 single-ended | 1 single-ended | 2 single-ended | 1 single-ended | 1 single-ended | 1 single-ended |
| Internal Reference | 4.096 V | 4.096 V | 4.096 V | 4.096 V | 4.096 V | 2.5 V (external) |
| Shutdown Current | 10 uA | 10 uA | 10 uA | 10 uA | 10 uA | 1 uA |
| Interface | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI/QSPI/MICROWIRE | SPI |
| Unit Price (1 pc) | $6.18 | $5.40 | $6.95 | $7.80 | $5.85 | $4.20 |
关键差异点
- Integrated 4.096V internal reference eliminates external reference IC （对比 AD7276BRMZ)
- 10uA automatic shutdown for battery-powered applications （对比 MAX11100PMB#)
- Wide digital supply range +2.7V to +5.25V simplifies MCU interfacing （对比 MAX11106PMB#)
设计说明
Place 0.1uF ceramic decoupling capacitors as close as possible to the AVDD and DVDD pins, with bulk 10uF tantalum or ceramic caps on each supply trace. Per the Maxim datasheet 19-6047, the exposed pad (EP) MUST be soldered to a continuous AGND plane for thermal dissipation and to achieve specified AC performance. Use a star-ground topology with separate analog and digital ground pours joined only at the ADC's AGND/DGND pins to prevent digital return-current noise from corrupting the analog input.
Do not exceed the +5.25V absolute maximum on AVDD - the internal ESD diodes clamp to the supply rail and overvoltage will forward-bias them. Ensure the REF pin has at least 1uF of low-ESR ceramic bypass capacitance to meet the datasheet AC performance specifications; reducing this capacitor degrades SNR by 3-6 dB. When using the internal reference in noisy environments, add a small RC filter (10 ohm + 100 nF) on the REF pin to suppress switching noise from digital rails.
Route the AIN input trace as a microstrip over a continuous ground plane, with no digital traces crossing underneath. Keep the AIN trace length under 50 mm and add a small RC anti-aliasing filter (typically 100 ohm + 1 nF) right at the AIN pin to limit RF pickup. The SCLK line should be routed with controlled impedance and a series 33 ohm damping resistor near the source to suppress reflections at SCLK frequencies above 20 MHz.
合规信息
ROHS3 compliant per distributor listings (ics-embedded.com, ic-acquisition.com). Industrial grade temperature range -40C to +85C. Not AEC-Q100 qualified - for automotive safety applications choose AEC-Q100-qualified alternatives.
