MAX1067BCEE - 14-Bit 200ksps 4-Ch SAR ADC | Maxim Integrated
MPN: MAX1067BCEE ✓ نشطMAX1067BCEE نظرة عامة
A SAR ADC is a successive-approximation analog-to-digital converter that uses a binary-search algorithm and an internal DAC to convert an analog input to a digital code. SAR ADCs offer deterministic latency, no pipeline delay, excellent DC accuracy, and a balance of speed and power. They sit in the broader hierarchy of: ADC -> data converter -> mixed-signal IC -> semiconductor. The MAX1067BCEE is a representative low-power precision SAR ADC optimized for multiplexed channel scanning.
Key features include 4-channel single-ended input multiplexer with scan mode, internal +4.096V reference (60 ppm/°C max drift), low current consumption of 3.0 mA at 200ksps, software-configurable unipolar/bipolar input ranges, and an integrated temperature sensor. The wide 4 MHz full-power bandwidth and 10 kHz full-linear bandwidth make the part suitable for both DC and dynamic measurement tasks. Power-down modes reduce current to 2 µA between conversions for battery-friendly operation.
The MAX1067BCEE uses a charge-redistribution DAC with a precision bandgap reference. The internal reference buffer drives the SAR comparator reference node, minimizing external component count. The 4-wire serial interface with active-low CS, SCLK, and DOUT supports daisy-chaining and is directly compatible with common DSP/MCU SPI peripherals. The scan mode automatically sequences conversions across the enabled channels, offloading CPU burden.
Typical applications include portable data logging, process control and instrumentation, medical instrumentation, battery-powered monitoring, factory-automation sensor interfaces, and multichannel 4-20 mA loop digitizers. The 4-channel single-ended mux makes it a fit for quad-zone temperature or pressure monitoring where each sensor needs independent conversion and a shared reference.
When designing with the MAX1067BCEE, allocate a quiet analog ground plane and decouple AVDD/DVDD with 1 µF and 0.1 µF ceramics as close to the pins as possible. Drive unused analog inputs to AVDD/2 to prevent ESD damage and to avoid the extra supply current caused by floating input protection diodes.
This page synthesizes distributor pricing, drop-in alternatives, design notes, and pinout not found on a single manufacturer or distributor product page.
بدائل مباشرة لـ MAX1067BCEE — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع MAX1067BCEE (نفس عامل الشكل والبصمة) — يختلف في Package, Resolution, Digital Supply Voltage, Number of Input Channels, Operating Temperature.
MAX1067BCEE+
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX1067BCEE-T
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX1067BCEE/V+
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX1067AEEE+
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
ADS8320IDRCR
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX1067BCEE الحدود القصوى والخصائص الكهربائية
| الدقة | 14 bits |
| Sample Rate | 200 kSamples/sec |
| Number of Input Channels | 4 single-ended |
| ADC Architecture | SAR (Successive Approximation) |
| Input Type | Single-Ended |
| نوع الواجهة | SPI / QSPI / MICROWIRE-compatible serial |
| Analog Supply Voltage | +5 V |
| Digital Supply Voltage | +2.7 V to +5.25 V |
| Internal Reference Voltage | +4.096 V |
| Reference Drift | 60 ppm/°C max |
| SINAD | 81 dB min, 84 dB typ |
| SNR | 82 dB min, 84 dB typ |
| THD | -98 dB min, -86 dB typ |
| SFDR | 86 dB min, 99 dB typ |
| Full-Power Bandwidth (-3 dB) | 4 MHz |
| Full-Linear Bandwidth (SINAD > 81 dB) | 10 kHz |
| Supply Current (200 ksps) | 3.0 mA typ |
| Power-Down Current | 2 µA typ |
| درجة حرارة التشغيل | 0°C to +70°C (commercial) |
| العلبة | 16-pin QSOP (MO-137AB) |
تكوين أطراف MAX1067BCEE
| دبوس 1 | AIN0 — Analog Input Channel 0 |
| دبوس 2 | AIN1 — Analog Input Channel 1 |
| دبوس 3 | AIN2 — Analog Input Channel 2 |
| دبوس 4 | AIN3 — Analog Input Channel 3 |
| دبوس 5 | AVDD — Analog +5V Supply |
| دبوس 6 | REF — Reference I/O (internal +4.096V or external reference input) |
| دبوس 7 | AGND — Analog Ground |
| دبوس 8 | SCLK — Serial Clock Input |
| دبوس 9 | CS — Active-Low Chip Select |
| دبوس 10 | DOUT — Serial Data Output |
| دبوس 11 | DGND — Digital Ground |
| دبوس 12 | DVDD — Digital Supply +2.7V to +5.25V |
| دبوس 13 | SHDN — Active-Low Shutdown Input |
| دبوس 14 | NC — Not connected (per datasheet) |
| دبوس 15 | NC — Not connected (per datasheet) |
| دبوس 16 | NC — Not connected (per datasheet) |
التطبيقات النموذجية
MAX1067BCEE مناسب لـ 6 التطبيقs: Portable Multichannel Data Logger, Process Control / Industrial Sensor Interface, Medical Instrumentation Monitoring, Battery-Powered Sensor Module, Factory Automation PLC Analog Input Module, Test and Measurement Front-End.
Portable Multichannel Data Logger
The MAX1067BCEE's 14-bit resolution and 4 single-ended input channels make it an ideal ADC for a 4-zone portable data logger sampling temperature, pressure, and battery voltage. Its 200 ksps sample rate comfortably oversamples 4 channels at 10 kHz each, while 2 µA power-down current between conversions extends battery life. The internal +4.096V reference eliminates the need for an external reference IC, shrinking the BOM for handheld instruments. Connect each sensor through a small RC anti-alias filter (typically 1 kohm / 100 nF) to the analog inputs. According to the Maxim datasheet, the 4-wire SPI interface connects directly to common low-power MCUs like the MAX32660.
موصى به
Process Control / Industrial Sensor Interface
In factory automation and process control, the MAX1067BCEE digitizes 4-20 mA loop outputs or 0-10V sensor signals through a 4-channel single-ended mux at 200 ksps aggregate. The 84 dB SINAD and 99 dB SFDR provide enough dynamic range for 14-bit precision on industrial sensor outputs. Use external op-amp signal conditioning (e.g. MAX4475) to scale sensor outputs into the 0-4.096V input range. The wide 4 MHz full-power bandwidth captures transient events; the integrated scan mode sequences channels automatically, offloading the PLC. Industrial deployments should use the MAX1067BCEE/V+ extended-temperature variant for -40C to +85C operation.
موصى به
Medical Instrumentation Monitoring
The MAX1067BCEE's low 3.0 mA supply current and 2 µA power-down current make it suitable for battery-powered medical monitoring devices like portable patient monitors, pulse oximeters, and digital thermometers. The 14-bit resolution digitizes sensor signals from thermistor bridges, photodiode amplifiers, and ECG front-ends with 84 dB SINAD dynamic range. The internal +4.096V reference provides 60 ppm/°C stability, adequate for medical-grade temperature compensation. According to the Maxim datasheet, the 16-pin QSOP package is small enough for wearable form factors while the SPI interface simplifies host-MCU communication.
موصى به
Battery-Powered Sensor Module
For battery-powered wireless sensor nodes (Zigbee, LoRa, BLE), the MAX1067BCEE's 3.0 mA active current and 2 µA shutdown current stretch battery life significantly. The 4 single-ended channels monitor battery voltage, temperature, humidity, and one application-specific sensor. The integrated +4.096V reference removes the need for an external reference, reducing the BOM and quiescent current. The 200 ksps maximum sample rate allows the part to oversample the sensors for digital averaging to push effective resolution past 16 bits. Power-down between conversions, then wake and convert only when a reading is required.
موصى به
Factory Automation PLC Analog Input Module
In PLC analog input modules, the MAX1067BCEE digitizes 4-20 mA current-loop signals or 0-10V analog inputs from field sensors. The 4 single-ended channels fit common quad-channel analog input cards. The internal multiplexer eliminates external analog switches, simplifying board layout. The 14-bit resolution and 84 dB SNR meet the accuracy requirements for process variable measurement (temperature, pressure, flow). The integrated scan mode sequences conversions automatically, reducing PLC scan-time overhead. The SPI interface is easily isolated using digital isolators (e.g. MAX14850) for high-voltage industrial environments.
موصى به
Test and Measurement Front-End
The MAX1067BCEE's 99 dB SFDR and 84 dB SINAD make it a strong fit for entry-level test and measurement front-ends such as bench-top multimeters, oscilloscope auxiliary channels, and data-acquisition modules. The wide 4 MHz full-power bandwidth captures dynamic signals, while the 14-bit resolution and DC accuracy support precision DC measurements when averaged. The internal +4.096V reference provides a stable calibration target. The 4-channel single-ended mux handles multiple test points with a single ADC. SPI interface allows direct FPGA or DSP front-end control in custom test gear.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MAX1067BCEE — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MAX1067BCEE+ | MAX1067BCEE-T | MAX1067BCEE/V+ | MAX1067AEEE+ | ADS8320IDRCR |
|---|---|---|---|---|---|---|
| Package | 16-pin QSOP (MO-137AB) | 16-pin QSOP - same | 16-pin QSOP - same | 16-pin QSOP - same | 16-pin QSOP - same | 16-pin QSOP - same |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Texas Instruments |
| Resolution | 14 bits | 14 bits | 14 bits | 14 bits | 14 bits | 14 bits |
| Sample Rate | 200 ksps | 200 ksps | 200 ksps | 200 ksps | 200 ksps | 200 ksps |
| Number of Input Channels | 4 single-ended | 4 single-ended | 4 single-ended | 4 single-ended | 4 single-ended | 1 pseudo-differential (2 inputs) |
| Internal Reference | +4.096 V | +4.096 V | +4.096 V | +4.096 V | +4.096 V | External only |
| Operating Temperature | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C | -40°C to +85°C | 0°C to +70°C | -40°C to +85°C |
| Supply Current (active) | 3.0 mA typ | 3.0 mA typ | 3.0 mA typ | 3.0 mA typ | 3.0 mA typ | 2.0 mA typ |
| RoHS / Lead-Free | No (leaded) | Yes (RoHS) | No (leaded) | Yes (RoHS, extended grade) | Yes (RoHS) | Yes (RoHS) |
أبرز الفروقات
- Integrated +4.096V reference with 60 ppm/°C drift (مقابلADS8320IDRCR)
- 4 single-ended input channels with scan mode (مقابلADS8320IDRCR (1 pseudo-differential / 2 inputs))
- Low 2 µA power-down current for battery operation (مقابلMAX1068BCEE (8-channel variant))
ملاحظات التصميم
Decouple AVDD and DVDD separately with 1 µF and 0.1 µF ceramic capacitors placed as close as possible to the supply pins. Star-ground AGND and DGND at a single point near the ADC's ground pins to avoid digital return currents corrupting the analog input. Place a small ferrite bead or 10 ohm resistor between the analog and digital +5V rails to suppress digital switching noise. According to the Maxim datasheet, bypassing is critical because the SAR comparator draws brief current pulses on each bit decision that can couple into the analog input if decoupling is inadequate.
Drive unused analog inputs to a defined voltage (AVDD/2 is ideal) to prevent the input protection diodes from biasing up and drawing extra supply current. The MAX1067BCEE input range is 0 to +4.096V; do not drive analog inputs below AGND or above AVDD - the ESD diodes will forward-bias and distort the conversion. Add external series resistors (1 kohm) if the source can swing outside the input range. Always use the SHDN pin to put the part into the 2 µA low-power state between conversions to maximize battery life.
Route the SPI bus (SCLK, CS, DOUT) away from analog input traces and clock oscillators. Use ground traces on both sides of the SPI bus for shielding. For multi-MHz SCLK rates, add 33 ohm series source terminations to suppress reflections on the SCLK and DOUT lines. Keep the analog input traces short and matched in length for the 4 channels; add small RC anti-alias filters (1 kohm + 100 nF) right at the ADC input pins to limit input bandwidth to about 1.6 kHz (suitable for 200 ksps conversion rate per Nyquist).
Estimated: At 200 ksps with 3.0 mA active supply current and 2 µA standby, duty-cycling at 10% reduces average supply current to 300 µA, easily handled by the QSOP-16's 150 C/W theta-JA without a heatsink. Continuous full-speed operation draws 3.0 mA from a +5V rail (15 mW), resulting in negligible self-heating of <0.5°C. No thermal management is required for normal operation. If AVDD is driven from a low-impedance source through a series ferrite bead, ensure the bead's DC resistance does not cause significant voltage drop at peak current draw.
معلومات الامتثال
MAX1067BCEE is the original leaded version. RoHS-compliant lead-free alternative is the MAX1067BCEE+ (same die, same package). Reach compliance confirmed via Maxim/Analog Devices product declaration. AEC-Q100 not qualified; for automotive, consult Analog Devices automotive-grade part list.
