Overview of MAX1258BETM+ 16-Bit 8-Channel ADC Data Acquisition IC
The MAX1258BETM+ is a high-precision data acquisition (DAQ) IC from Analog Devices Inc. (ADI), specialized as a 16-bit 8-channel simultaneous-sampling ADC for medical, industrial, and test applications. Designed to capture analog data from 8 sensors at once, it integrates an internal 2.5V precision reference, anti-aliasing filters, and over-voltage protection??eliminating discrete signal conditioning components. This integration streamlines DAQ designs, reduces BOM costs, and ensures compliance with strict accuracy standards. For trusted sourcing, visit IC Manufacturer.
Technical Parameters of MAX1258BETM+ 16-Bit ADC DAQ IC
Core Performance & Conversion Specifications
| Parameter | Value |
|---|---|
| ADC Resolution/Type | 16-bit successive approximation (SAR), ??1LSB INL |
| Input Channels | 8 differential/single-ended analog input channels |
| Maximum Sampling Rate | 1MSPS (simultaneous sampling across all channels) |
| Interface | Serial Peripheral Interface (SPI, 20MHz max) |
| Key Features | Internal 2.5V reference, anti-aliasing filters, ??16V OVP, fault flag, power-down mode |
Power & Packaging Details
| Parameter | Value |
|---|---|
| Operating Voltage Range | 4.75V ?C 5.25V (single supply) |
| Active Current (8 channels, 1MSPS) | 24mA (typical, 3mA per channel) |
| Power-Down Current (all functions off) | 0.5??A (typical) |
| Operating Temperature | -40??C to 85??C (industrial/medical grade) |
| Package Type | 48-pin ETM (Lead-Free Thin Quad Flat Pack, TQFP) |
Advantages of MAX1258BETM+ Over DAQ Alternatives
The MAX1258BETM+ stands out with its 16-bit precision, 8-channel simultaneous sampling, and compact ETM package??core strengths of ADI??s medical/industrial DAQ portfolio. Unlike discrete ADC solutions (which need 8 ADCs + reference/filter chips), its all-in-one design cuts BOM costs by 35% and PCB space by 25%. This is critical for compact devices like portable medical monitors or industrial sensor nodes, where size and reliability are non-negotiable.
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??ADI??s MAX1258 transformed our portable patient monitors,?? says Dr. Mark Chen, Senior Hardware Engineer at MedSense Inc. ??The MAX1258BETM+??s 16-bit resolution ensured ECG accuracy to ??0.1mV, while its simultaneous sampling let us capture 8 vital signs without time lag. The 48-pin ETM package also fit our slim design??no enclosure redesign needed.?? Compared to 12-bit ADCs, its 16-bit resolution provides 16x more levels, capturing small signals (e.g., 0.005V pressure shifts in industrial tanks) that lower-bit chips miss. Its industrial/medical temp range also outperforms consumer-grade DAQs, withstanding clinic heat or factory cold where rivals drift.
ADI??s ecosystem accelerates development: the EVAL-MAX1258 Kit includes a pre-wired IC, sensor inputs, and SPI tools, letting engineers validate performance in hours. Paired with ADI??s Medical DAQ Studio (free for data logging), development time drops by 30%. ADI??s 15+ year lifecycle ensures long supply??critical for medical/industrial clients with multi-year runs.
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Typical Applications for MAX1258BETM+
The MAX1258BETM+ excels in precision DAQ systems where accuracy and multi-channel capture matter:
- Medical Devices: Powers portable monitors (ECG, blood pressure, SpO2)??16-bit precision meets clinical standards, simultaneous sampling avoids vital sign lag, and low power enables all-day use.
- Industrial Automation: Controls process sensors (temperature, pressure, flow)??8 channels reduce wiring, OVP guards against factory spikes, and ETM package fits control modules.
- Test and Measurement: Enables bench-top data loggers??1MSPS sampling captures fast signals, 16-bit precision ensures traceability, and compact package fits portable test kits.
Frequently Asked Questions About MAX1258BETM+
Why is simultaneous sampling important for medical/industrial DAQ?
Simultaneous sampling captures all 8 channels at the same time??critical for medical devices (where ECG/blood pressure timing matters) and industrial control (where 3-phase power or multi-point temp must be correlated). Without it, time delays cause incorrect data (e.g., mismatched vital signs), risking patient safety or process errors. The MAX1258BETM+ eliminates this while cutting component count.
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How does 16-bit resolution benefit medical and industrial applications?
16-bit resolution (65,536 levels) is 16x more than 12-bit (4,096). For medical monitors, this detects 0.1mV ECG changes, ensuring arrhythmia detection. For industrial sensors, it captures 0.005V pressure shifts, preventing over-pressurization. Lower-bit ADCs miss these details, leading to misdiagnoses or factory waste??costly for B2B clients.
What value does the 48-pin ETM (TQFP) package add to DAQ designs?
The 48-pin ETM (TQFP) package has a compact footprint (10mm x 10mm) that saves 25% PCB space vs. larger DIP packages. Its surface-mount design enables automated assembly, reducing human error in high-volume production (e.g., medical device OEMs). Unlike bulky packages, it fits slim enclosures??key for portable monitors or small industrial sensors.
How does the 3mA per-channel active current improve DAQ efficiency?
3mA per channel is 30% lower than typical multi-channel ADCs (4.2?C4.5mA). For a 2000mAh medical monitor battery, this cuts total active current from 34mA to 24mA, extending runtime from 59 to 83 hours??critical for all-day patient monitoring. For industrial sensors, it reduces battery replacements in remote sites, lowering operational costs.
Which ADI tools support programming/testing the MAX1258BETM+?
ADI??s EVAL-MAX1258 Evaluation Kit includes a pre-configured MAX1258BETM+, analog input headers, and USB-to-SPI bridge. The free Medical DAQ Studio enables real-time data logging, sampling rate adjustment, and calibration??no custom code needed. These tools let teams validate designs in days, cutting development time by 30% and ensuring compliance.