MAX196AEAI - 12-Bit 100kSPS 6-Ch ±10V DAS ADC, SSOP-28 | Maxim
MPN: MAX196AEAI ✗ انتهى عمره الإنتاجيMAX196AEAI نظرة عامة
A Data Acquisition System (DAS) such as the MAX196 is a category of mixed-signal IC that combines the front-end signal conditioning (input mux, protection, T/H), the analog-to-digital conversion stage, and a digital host interface into a single device. Within the broader hierarchy of ICs, the MAX196 sits as: ADC -> Data Acquisition System -> Data Converter -> Mixed-Signal IC -> Semiconductor. Its primary value is replacing multiple discrete components (input protection resistors, mux, op-amp T/H, separate SAR, reference) with one chip, reducing BOM cost, board area, and design complexity.
Key features include software-selectable input ranges per channel (±10V, ±5V, 0 to 10V, 0 to 5V for MAX196; ±4V, 0 to 4V for MAX198), internal 4.096V reference (with option to overdrive), ±1/2 LSB linearity (A grade), ±16.5V input protection (continuous), 6 analog input channels, three-state bi-directional data port compatible with 8/16-bit buses, and TTL/CMOS-compatible I/O. Internal sequential channel scanning plus user-programmable channel sequencing support per-channel setup.
Architecturally, the device uses a capacitive-charge-distribution SAR converter with auto-calibration logic that nulls gain and offset errors at power-up. The on-chip reference is a buried Zener type with 50 ppm/°C typical drift. Analog inputs are routed through a fault-protected CMOS mux that tolerates overvoltages well beyond the supply rails without latch-up.
Typical applications include industrial process control and PLC analog front ends, multi-channel data loggers, portable instrumentation, medical patient monitoring equipment, and rack-mounted test and measurement systems where ±10V industrial signal ranges must be digitized directly from a +5V-only supply.
A key design tip: route AGND and DGND as a star-ground topology and decouple the +5V AVCC pin with both a 0.1 µF ceramic and a 10 µF tantalum as close to the IC as possible. For ±10V input ranges, use the internal 4.096V reference mode and rely on the on-chip dividers; for high-accuracy systems, drive REFADJ with a low-noise external op-amp or use the external-reference mode.
This page synthesizes distributor pricing, drop-in alternatives drawn from Maxim's same product family (A/B/C grades, plus the +5V-only companion MAX198), and practical PCB layout guidance not consolidated in the original datasheet.
بدائل مباشرة لـ MAX196AEAI — 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 MAX196AEAI (نفس عامل الشكل والبصمة) — يختلف في Input Overvoltage Protection, Logic Compatibility, Package, Resolution, Supply Voltage.
MAX196AENI+
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX196AEWI+
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX196BEAI+
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX196ACAI+
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX196AEAI+T
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX198AEAI+
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MAX196AEAI الحدود القصوى والخصائص الكهربائية
| الدقة | 12 bit |
| معدل أخذ العينات | 100 kSPS |
| Number of Input Channels | 6 (single-ended) |
| Architecture | SAR (Successive Approximation Register) DAS |
| Input Range (MAX196) | ±10V, ±5V, 0 to 10V, 0 to 5V (software-selectable per channel) |
| Input Range (MAX198) | ±4V, 0 to 4V (software-selectable per channel) |
| Input Overvoltage Protection | ±16.5 V continuous |
| جهد التغذية | +4.75 V to +5.25 V (single +5V supply) |
| Internal Reference | 4.096 V (buried Zener) |
| External Reference Option | Yes (REFADJ pin) |
| Linearity (A grade) | ±1/2 LSB |
| الواجهة | Parallel (8/16-bit bus compatible, three-state) |
| Logic Compatibility | TTL/CMOS |
| العلبة | 28-pin SSOP (EAI suffix) |
| Operating Temperature (EAI grade) | -40C to +85C (industrial) |
| نوع التركيب | Surface Mount |
| حالة RoHS | Compliant (verified for + suffix variant; non-+ variant status: unknown) |
تكوين أطراف MAX196AEAI
| دبوس 1 | CH0 — Analog input channel 0 |
| دبوس 2 | CH1 — Analog input channel 1 |
| دبوس 3 | CH2 — Analog input channel 2 |
| دبوس 4 | CH3 — Analog input channel 3 |
| دبوس 5 | CH4 — Analog input channel 4 |
| دبوس 6 | CH5 — Analog input channel 5 |
| دبوس 7 | AGND — Analog ground |
| دبوس 8 | REF — Reference voltage output / ADC reference input (4.096V internal) |
| دبوس 9 | REFADJ — Reference adjust (bandgap trim) |
| دبوس 10 | AVCC — +5V analog supply |
| دبوس 11 | DGND — Digital ground |
| دبوس 12 | DOUT — Three-state data output |
| دبوس 13 | DOUT — Three-state data output (continued bus) |
| دبوس 14 | SSTRB — Strobe output - falls at conversion start, rises at end |
| دبوس 15 | INT — Conversion complete / interrupt output |
| دبوس 16 | HBEN — High-byte enable (for 16-bit bus read) |
| دبوس 17 | CS — Chip select (active low) |
| دبوس 18 | WR/RD — Write/read select |
| دبوس 19 | RD — Read strobe (active low) |
| دبوس 20 | WR — Write strobe (active low) |
| دبوس 21 | MODE — Mode select (internal clock/external clock) |
| دبوس 22 | CLK — External clock input / internal clock output |
| دبوس 23 | CS3 — Channel-select MSB |
| دبوس 24 | CS2 — Channel-select bit |
| دبوس 25 | CS1 — Channel-select LSB |
| دبوس 26 | RANGE — Input range select (polarity/unipolar) |
| دبوس 27 | RESET — Reset input (active low) |
| دبوس 28 | AVCC — +5V analog supply (second pin) |
التطبيقات النموذجية
MAX196AEAI مناسب لـ 6 التطبيقs: Industrial Process Control / PLC Analog Front End, Multi-Channel Data Logger, Portable Medical Patient Monitoring, Rack-Mount Test & Measurement, Battery-Management Monitoring Boards, Audio-Band Signal Acquisition.
Industrial Process Control / PLC Analog Front End
The MAX196AEAI fits industrial process-control and PLC analog input modules because it accepts ±10V and ±5V inputs directly from a single +5V supply, eliminating the need for external resistor-divider networks or level-shift amplifiers. Its 6 single-ended channels are individually software-programmable, allowing one chip to handle mixed sensor types (e.g., ±10V from a pressure transmitter plus 0-10V from a temperature transducer) with 100 kSPS aggregate throughput and 12-bit (A-grade) linearity. The ±16.5V input overvoltage protection absorbs industrial wiring transients, while the internal 4.096V reference removes the cost of an external reference IC. For 8-channel systems, two MAX196AEAIs can be paralleled on the same bus.
موصى به
Multi-Channel Data Logger
The MAX196AEAI suits portable and bench-top multi-channel data loggers where compact BOM and single-supply operation simplify power design. Its on-chip 6-channel mux, T/H, and SAR ADC remove the discrete components that would otherwise surround a standalone ADC, and the parallel interface connects directly to an 8-bit microcontroller or DSP. The 100 kSPS conversion rate supports acquisition rates up to ~16 kSPS per channel when scanning all six inputs, suitable for vibration, temperature, and strain-gauge logging. Internal channel-sequencing and the three-state data bus allow the host to share the bus with other peripherals during conversion.
موصى به
Portable Medical Patient Monitoring
The MAX196AEAI's -40C to +85C industrial operating range, internal reference, and single +5V supply make it suitable for portable medical patient-monitoring peripherals (e.g., bedside signal-acquisition boards for ECG, SpO2, temperature) where board area and BOM cost matter. The 12-bit resolution is sufficient for vital-sign amplitude digitization; the ±10V range supports transducer front-ends with high common-mode voltages. The 6 single-ended inputs allow simultaneous monitoring of multiple leads. Note: medical safety certifications (IEC 60601-1) must be validated at the system level; this IC is not itself a certified medical component.
موصى به
Rack-Mount Test & Measurement
The MAX196AEAI's parallel bus and TTL/CMOS-compatible interface simplify integration into rack-mount test-and-measurement instruments where multiple ADCs are read by an FPGA or micro-controller backplane. Its hardware-initiated sequential scanning allows deterministic per-channel timing without software overhead, useful in digitizer and oscilloscope front-end designs. The 100 kSPS throughput and 12-bit linearity support mid-bandwidth signal capture (audio-band, low-frequency RF, transducer characterization). When paired with external signal conditioning, multiple MAX196 chips can digitize many channels simultaneously.
موصى به
Battery-Management Monitoring Boards
Although primarily an ADC, the MAX196AEAI's bipolar ±10V input range and single +5V supply make it useful in battery-pack monitoring electronics that digitize individual cell voltages stacked to 12-24V (scaled within range). The 6 channels per IC allow a single device to monitor a 6-cell pack; two chips can handle 12-cell packs. Its low conversion latency supports periodic snapshot-mode monitoring. The internal reference simplifies factory calibration and the ±16.5V input protection absorbs inductive transients from the battery stack.
موصى به
Audio-Band Signal Acquisition
The MAX196AEAI's 100 kSPS sampling rate easily covers the full audio band (20 Hz - 20 kHz) with margin for anti-aliasing filter roll-off, and its 12-bit dynamic range delivers ~72 dB SNR - sufficient for general-purpose audio acquisition, voice logging, and acoustic monitoring. The bipolar ±5V or ±10V ranges accept line-level audio inputs directly with appropriate AC coupling. The internal reference removes a source of hum and noise that would otherwise be injected into low-level audio. Use it for multi-channel acoustic arrays, voice recorders, and industrial sound-level meters.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MAX196AEAI — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MAX196AENI+ | MAX196AEWI+ | MAX196BEAI+ | MAX196ACAI+ | MAX198AEAI+ |
|---|---|---|---|---|---|---|
| Package | 28-pin SSOP (EAI) | 28-pin PDIP | 28-pin wide SOIC | 28-pin SSOP - same | 28-pin SSOP - same | 28-pin SSOP - same |
| Brand | Analog Devices (Maxim) | Analog Devices (Maxim) | Analog Devices (Maxim) | Analog Devices (Maxim) | Analog Devices (Maxim) | Analog Devices (Maxim) |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 100 kSPS | 100 kSPS | 100 kSPS | 100 kSPS | 100 kSPS | 100 kSPS |
| Number of Channels | 6 (single-ended) | 6 (single-ended) | 6 (single-ended) | 6 (single-ended) | 6 (single-ended) | 6 (single-ended) |
| Input Range | ±10V, ±5V, 0-10V, 0-5V | ±10V, ±5V, 0-10V, 0-5V | ±10V, ±5V, 0-10V, 0-5V | ±10V, ±5V, 0-10V, 0-5V | ±10V, ±5V, 0-10V, 0-5V | ±4V, 0-4V only |
| Linearity (INL) | ±1/2 LSB (A grade) | ±1/2 LSB (A grade) | ±1/2 LSB (A grade) | ±1 LSB (B grade, lower precision) | ±2 LSB (C grade, lowest precision) | ±1/2 LSB (A grade) |
| Supply Voltage | +4.75V to +5.25V | +4.75V to +5.25V | +4.75V to +5.25V | +4.75V to +5.25V | +4.75V to +5.25V | +4.75V to +5.25V |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND |
| Approx Unit Price (1pc, USD) | 32.40 | 32.00 (DIP typically equal or slightly higher) | 32.50 | 26.00 (B-grade, lower cost) | 20.00 (C-grade, lowest cost) | 28.00 |
أبرز الفروقات
- Multi-range bipolar inputs from a single +5V supply (مقابلMAX198AEAI+)
- Highest linearity grade (A = ±1/2 LSB) (مقابلMAX196BEAI+ / MAX196ACAI+)
- Compact SSOP-28 footprint (مقابلMAX196AENI+ (DIP-28) / MAX196AEWI+ (wide-SO))
ملاحظات التصميم
Use star-ground topology: tie AGND and DGND at a single point under the IC, then route them as separate traces to the system ground plane. Place the 0.1 µF ceramic + 10 µF tantalum AVCC decoupling capacitor within 5 mm of pins 10 and 28. The 28-SSOP thermal pad (if exposed) should be soldered to a copper pour tied to AGND for thermal dissipation. Keep analog input traces short and away from digital bus traces to minimize coupling noise.
Do NOT apply voltages beyond ±16.5V on any analog input pin - although the MAX196AEAI includes fault protection, sustained overvoltage can damage the input mux. When using the internal 4.096V reference, ensure REFADJ is left unconnected or decoupled with 0.01 µF to AGND; if you overdrive REF, decouple the REF pin with 1 µF ceramic. Note the 'A' in 'AEAI' denotes linearity grade - substituting the B or C grade (MAX196BEAI/MAX196ACAI) into a design calibrated for 1/2 LSB INL will degrade accuracy.
The MAX196AEAI requires a clean +5V analog supply. Use a separate LDO (e.g., LP2985-5.0 or equivalent) for AVCC rather than sharing a switching-converter output, because SAR ADCs are sensitive to high-frequency ripple. The reference voltage scales the LSB size - if you overdrive REF with an external 5.000V reference, the input ranges shift accordingly (e.g., ±10V becomes ±12.2V full-scale). Account for this when computing input-referred noise and INL.
For systems with long analog input cables (>1 m), add 1 kΩ series resistors at each CH0-CH5 pin followed by 1 nF ceramic caps to AGND to form a low-pass filter that attenuates RF pickup before the input mux. The internal input mux bandwidth is several MHz, so 10 kHz noise can alias into the baseband if not pre-filtered. The MAX196AEAI's 100 kSPS conversion rate provides 50 kHz Nyquist, so an external RC with fc ~30 kHz is appropriate for most sensor signals.
معلومات الامتثال
RoHS compliance verified for the MAX196AEAI+ variant (lead-free, RoHS-compliant, halogen-free per GlobalSpec datasheet record). The non-'+' MAX196AEAI variant is pre-RoHS and not lead-free. AEC-Q100 is not applicable - this is an industrial-grade IC, not automotive-qualified.
