MAX1230ACEG+ - 12-Bit 300ksps 16-Ch ADC with FIFO | Maxim Integrated
MPN: MAX1230ACEG+ ✓ نشطMAX1230ACEG+ نظرة عامة
An ADC is a mixed-signal integrated circuit that converts real-world analog voltages into discrete digital codes. The MAX1230 belongs to the successive-approximation register (SAR) ADC family, which trades raw speed for high accuracy and low power consumption. Within the broader component taxonomy, SAR ADCs sit beneath data converters, which themselves are a subset of mixed-signal ICs and ultimately semiconductor devices used for precision instrumentation and embedded system design.
The MAX1230ACEG+ integrates several blocks normally external to a basic ADC: a true-differential input multiplexer (8 single-ended or 16 differential channels), a low-drift internal reference, a ±1°C internal temperature sensor, a 16-entry First-In/First-Out buffer, configurable scan-mode sequencing, internal averaging, and a power-saving AutoShutdown mode that drops supply current between conversions. The on-chip FIFO lets a host controller sleep while multiple conversions accumulate, easing firmware timing constraints. A 10MHz SPI/QSPI/MICROWIRE-compatible serial interface streams data out without gluing logic to the host bus.
Typical applications span industrial process control loops, multi-channel data-acquisition front-ends, battery-cell monitoring and stack voltage measurement, portable and rack-mounted instrumentation, and embedded sensor hubs that also need on-board temperature compensation. The internal temperature sensor eliminates an external thermistor or remote diode in chassis-monitoring designs. For low-power systems, AutoShutdown and scan-mode combine to let the part sip quiescent current while sweeping many channels.
When designing with this device, budget for an external 0.1µF bypass capacitor close to the supply pin and a 10µF reservoir on the reference pin to preserve linearity at full 300ksps throughput. Choose between single-ended and differential input modes based on the common-mode range of the upstream signal conditioning; the integrated input mux is software-configurable, so no hardware changes are required to switch between 8 SE or 16 DIFF channels.
This page consolidates manufacturer datasheet specifications, current distributor pricing, drop-in same-package alternatives, and practical design notes that go beyond the datasheet to help engineers select and qualify the MAX1230ACEG+ quickly.
بدائل مباشرة لـ MAX1230ACEG+ — 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 MAX1230ACEG+ (نفس عامل الشكل والبصمة) — يختلف في Operating Temperature Range, Package, Supply Voltage.
MAX1230BCEG+
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX1230ACEG+T
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MAX1230BCEG+T
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX1228BCEG+
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX1226BCEG+
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
MAX1230ACEG+ الحدود القصوى والخصائص الكهربائية
| الدقة | 12 bit |
| معدل أخذ العينات | 300 ksps |
| Number of Input Channels | 8 single-ended / 16 differential |
| Converter Architecture | SAR (Successive Approximation) |
| Number of ADCs | 1 |
| Input Type | Single-Ended / Differential |
| جهد التغذية | 5.25 V (max) |
| Internal Reference Voltage | 4.096 V |
| مستشعر درجة الحرارة الداخلي | Yes (±1°C accuracy) |
| Internal FIFO | 16 entries |
| Serial Interface | SPI/QSPI/MICROWIRE-compatible, 10 MHz |
| AutoShutdown | Yes |
| Scan Mode / Internal Averaging | Yes |
| نطاق درجة حرارة التشغيل | -40°C to +85°C (extended) |
| العلبة | 24-pin QSOP |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant |
تكوين أطراف MAX1230ACEG+
| 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 | AIN4 — Analog input channel 4 |
| دبوس 6 | AIN5 — Analog input channel 5 |
| دبوس 7 | AIN6 — Analog input channel 6 |
| دبوس 8 | AIN7 — Analog input channel 7 |
| دبوس 9 | REF — Reference voltage input/output (4.096V internal) |
| دبوس 10 | REFCAP — Reference bypass capacitor |
| دبوس 11 | AGND — Analog ground |
| دبوس 12 | VDD — Analog supply voltage (+5V) |
| دبوس 13 | DGND — Digital ground |
| دبوس 14 | DVDD — Digital supply voltage |
| دبوس 15 | CS — Chip select (serial interface) |
| دبوس 16 | SCLK — Serial clock input |
| دبوس 17 | DIN — Serial data input |
| دبوس 18 | DOUT — Serial data output |
| دبوس 19 | SSTRB — Serial-strobe output |
| دبوس 20 | AIN15/AIN8- — Analog input (channel 15 or diff pair 8-) |
| دبوس 21 | AIN14/AIN8+ — Analog input (channel 14 or diff pair 8+) |
| دبوس 22 | AIN13/AIN9- — Analog input (channel 13 or diff pair 9-) |
| دبوس 23 | AIN12/AIN9+ — Analog input (channel 12 or diff pair 9+) |
| دبوس 24 | AIN11/AIN10+ — Analog input (channel 11 or diff pair 10+) |
التطبيقات النموذجية
MAX1230ACEG+ مناسب لـ 6 التطبيقs: Multi-Channel Data Acquisition Systems, Industrial Process Control, Battery Cell Monitoring & Management, Portable Instrumentation & Test Equipment, Embedded Sensor Hubs with Temperature Compensation, Rack-Mounted Monitoring Systems.
Multi-Channel Data Acquisition Systems
The MAX1230ACEG+ is designed for multi-channel data-acquisition front-ends where 12-bit resolution and 16 input channels are required. Its 300 ksps sampling rate supports aggregate throughput across the channel mux, while the internal 4.096V reference eliminates the need for an external reference IC. The 16-entry FIFO lets the host controller process conversions in bursts, reducing firmware overhead and enabling simultaneous sampling across multiple sensors in industrial DAQ boards.
موصى به
Industrial Process Control
The MAX1230ACEG+ suits industrial process-control loops that monitor multiple analog variables such as temperature, pressure, and flow. Its 16-channel differential input multiplexer can connect directly to bridge-type sensors, while the internal ±1°C temperature sensor compensates for thermal drift in the front-end. The extended -40°C to +85°C operating range supports factory-floor deployments, and AutoShutdown reduces quiescent current during idle periods to ease thermal management in sealed enclosures.
موصى به
Battery Cell Monitoring & Management
The MAX1230ACEG+ excels in battery-cell monitoring applications such as multi-cell lithium-ion stacks, where each cell voltage must be measured individually. Its 12-bit resolution and differential input capability provide accurate cell voltage readings across the stack, while AutoShutdown minimizes quiescent current draw between scans. The internal FIFO can accumulate readings from all cells before waking the host MCU, which is critical for low-power battery-management designs.
موصى به
Portable Instrumentation & Test Equipment
The MAX1230ACEG+ is well matched to portable and benchtop instrumentation where multi-channel analog inputs and on-board temperature compensation are required. The internal temperature sensor with ±1°C accuracy eliminates the need for an external thermistor, and the small QSOP-24 footprint enables compact handheld designs. AutoShutdown extends battery life in field-instruments, while the 10 MHz SPI/QSPI/MICROWIRE interface connects to most ARM-based MCUs without glue logic.
موصى به
Embedded Sensor Hubs with Temperature Compensation
The MAX1230ACEG+ supports embedded sensor-hub designs that aggregate multiple analog sensors and require on-board temperature compensation. The integrated temperature sensor readings can be read through the same serial interface, allowing the host to apply temperature compensation to other sensor channels in firmware. The internal FIFO and scan-mode sequencing automate the sampling pattern, letting the host MCU wake only when a batch of readings is ready.
موصى به
Rack-Mounted Monitoring Systems
The MAX1230ACEG+ fits rack-mounted monitoring systems that supervise multiple analog rails, fans, and thermal zones simultaneously. With 16 differential inputs and a 12-bit ADC core, it can scan supply voltages, current-sense amplifier outputs, and temperature probes in rotation. The 24-pin QSOP package is easy to route on multi-layer backplanes, and the AutoShutdown feature minimizes heat dissipation in dense server-class chassis where many such ADCs operate in parallel.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MAX1230ACEG+ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MAX1230BCEG+ | MAX1230ACEG+T | MAX1230BCEG+T | MAX1228BCEG+ | MAX1226BCEG+ |
|---|---|---|---|---|---|---|
| Package | 24-pin QSOP | 24-pin QSOP - same | 24-pin QSOP - same | 24-pin QSOP - same | 24-pin QSOP - same | 24-pin QSOP - same |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 300 ksps | 300 ksps | 300 ksps | 300 ksps | 300 ksps | 300 ksps |
| Input Channels | 8 SE / 16 DIFF | 8 SE / 16 DIFF | 8 SE / 16 DIFF | 8 SE / 16 DIFF | 4 SE / 8 DIFF | 4 SE / 8 DIFF |
| Accuracy Grade | A-grade | B-grade (lower accuracy) | A-grade | B-grade | B-grade | B-grade |
| Internal Temperature Sensor | Yes (±1°C) | Yes (±1°C) | Yes (±1°C) | Yes (±1°C) | Yes | Yes |
| Internal Reference | 4.096 V | 4.096 V | 4.096 V | 4.096 V | 4.096 V | 4.096 V |
أبرز الفروقات
- 16 differential input channels with 16-entry FIFO (مقابلMAX1228BCEG+)
- Tighter DC accuracy (A-grade) (مقابلMAX1230BCEG+)
- Integrated ±1°C temperature sensor eliminates external thermistor (مقابلDiscrete ADC + external thermistor designs)
- AutoShutdown + scan mode for ultra-low quiescent current (مقابلCompetitor 12-bit ADCs without AutoShutdown)
ملاحظات التصميم
Place a 0.1µF ceramic bypass capacitor as close as possible to the VDD (analog supply) pin and a 10µF reservoir capacitor close to the REFCAP pin. This decoupling network stabilizes the internal 4.096V reference during the SAR conversion bursts, which draw transient currents that can otherwise inject noise into the analog input path. Without proper bypassing, INL and DNL performance degrades noticeably at full 300 ksps throughput.
Keep the analog input traces short and routed away from digital lines (CS, SCLK, DIN, DOUT, SSTRB) to minimize coupling noise. Use a star-ground topology that ties AGND and DGND at a single point under or near the IC, and place a ground plane on layer 2 if using a 4-layer PCB. The QSOP-24 lead pitch is 0.025" (0.635 mm), so take care with trace widths and clearances during layout.
Do not exceed the absolute maximum analog input voltage of VDD + 0.3V on any AIN pin, or latch-up may occur. When using differential input mode, ensure the common-mode voltage stays within the specified range — otherwise the multiplexer’s body diode can forward-bias. Also, verify that AutoShutdown is properly sequenced with the serial interface; otherwise the part may enter a low-power state mid-conversion and yield invalid data.
When sampling at the full 300 ksps rate, the source impedance of the driving amplifier matters significantly. The MAX1230ACEG+ has a finite input sampling capacitance (~30 pF typical), and high source impedance causes gain error and reduced linearity. Add an external buffer op-amp with low output impedance if driving the inputs directly from a high-impedance sensor such as a strain-gauge bridge.
معلومات الامتثال
RoHS and REACH compliant per distributor listings. Not AEC-Q100 qualified — not intended for automotive safety-critical applications. Lead-free (Pb-free) finish per Maxim Integrated manufacturing standards.
