MAX198BENI - 12-Bit 100kSPS 6-Ch DAS 28-PDIP | Maxim Integrated
MPN: MAX198BENI ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $32.4 | $32.40 |
| 10 | $28.95 | $289.50 |
| 100 | $24.5 | $2,450.00 |
| 500 | $21.8 | $10,900.00 |
| 1,000 | $19.2 | $19,200.00 |
MAX198BENI Overview
A data acquisition system (DAS) is an integrated mixed-signal IC that aggregates analog multiplexing, sample-and-hold, and ADC conversion into a single chip, sitting between analog sensors and a digital processor within the broader hierarchy of data converters -> ADC/DAC -> signal chain -> mixed-signal ICs -> semiconductors. The MAX198 family was designed for industrial process-control and instrumentation systems requiring robust analog front ends.
Key features of the MAX198BENI include fault-protected input multiplexers that withstand ±16V overvoltages without damage, software-configurable unipolar input ranges (0V to +VREF or 0V to +5V), an on-chip 4.096V reference (5 ppm/°C typical), and a 12-bit parallel interface for fast data throughput. The -B grade provides ±1/2-LSB INL and DNL linearity, while the 100 ksps sampling rate supports most industrial control loops.
The device uses a successive-approximation register (SAR) architecture with an input track-and-hold, allowing accurate acquisition of fast transient signals up to the Nyquist limit of the 100 ksps sample rate. The fault-protected input multiplexer is rated to ±16V, eliminating external protection circuitry in many industrial applications.
Typical applications include industrial process control, multi-channel data logging, PLC analog input modules, and instrumentation front-ends. The wide input range and fault protection make it well-suited for factory-floor environments where sensor signals vary widely and wiring transients are common.
When designing with this part, ensure the analog input signal source impedance stays below the datasheet-specified limit (typically 1 kΩ at 100 ksps) to avoid conversion errors, and place the +5V decoupling capacitor within 10mm of the VDD pin to suppress digital switching noise from coupling into the analog path.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing engineers a single consolidated source for sourcing decisions.
Drop-in alternatives for MAX198BENI — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MAX198BENI (same form factor and footprint) — differing in Function, Manufacturer, Mounting Type, Package, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX198BCNI+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX198AENI+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX198ACNI+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX198BCAI
✅ Drop-In✓ In Stock
$16.95 / Unit
View Datasheet →MAX198BENI Maximum Ratings & Electrical Characteristics
| Manufacturer | Maxim Integrated (Analog Devices Inc.) |
| Function | Data Acquisition System (DAS) |
| Number of Channels | 6 |
| Resolution | 12 bit |
| Sampling Rate | 100 ksps |
| Supply Voltage | +5 V single supply |
| Linearity (INL/DNL) | 1/2 LSB max (B grade) |
| Input Range | 0V to +VREF or 0V to +5V (unipolar) |
| Internal Reference | 4.096 V |
| Fault-Protected Inputs | ±16 V overvoltage |
| Data Interface | 12-bit parallel |
| Package | 28-pin PDIP (N) |
| Mounting Type | Through-Hole (DIP) |
| Operating Temperature | -40°C to +85°C (industrial) |
| Architecture | SAR with track-and-hold |
MAX198BENI Pin Configuration
| Pin 1 | CH0 — Analog input channel 0 |
| Pin 2 | CH1 — Analog input channel 1 |
| Pin 3 | CH2 — Analog input channel 2 |
| Pin 4 | CH3 — Analog input channel 3 |
| Pin 5 | CH4 — Analog input channel 4 |
| Pin 6 | CH5 — Analog input channel 5 |
| Pin 7 | VDD — +5V analog supply |
| Pin 8 | AGND — Analog ground |
| Pin 9 | REF — Reference voltage input/output |
| Pin 10 | REFADJ — Reference adjust pin |
| Pin 11 | INT — Interrupt output |
| Pin 12 | HBEN — High-byte enable |
| Pin 13 | CS — Chip select (active low) |
| Pin 14 | WR — Write strobe |
| Pin 15 | RD — Read strobe |
| Pin 16 | DGND — Digital ground |
| Pin 17 | D11 — Data bit 11 (MSB) |
| Pin 18 | D10 — Data bit 10 |
| Pin 19 | D9 — Data bit 9 |
| Pin 20 | D8 — Data bit 8 |
| Pin 21 | D7 — Data bit 7 |
| Pin 22 | D6 — Data bit 6 |
| Pin 23 | D5 — Data bit 5 |
| Pin 24 | D4 — Data bit 4 |
| Pin 25 | D3 — Data bit 3 |
| Pin 26 | D2 — Data bit 2 |
| Pin 27 | D1 — Data bit 1 |
| Pin 28 | D0 — Data bit 0 (LSB) |
Typical Applications
MAX198BENI is suitable for 6 applications: Industrial Process Control & PLC Analog Input Modules, Multi-Channel Data Logging Systems, Medical Patient Monitoring Equipment, HVAC and Building Automation Sensor Interfaces, Automotive Diagnostic and Test Equipment, Instrumentation Front-End for Test & Measurement.
Industrial Process Control & PLC Analog Input Modules
The MAX198BENI's 6 single-ended input channels, ±16V fault protection, and 100 ksps throughput make it ideal for industrial process control and PLC analog input modules that monitor multiple 4-20mA-loop-derived or 0-10V sensor signals. The MAX198BENI directly interfaces to PLC CPUs via its 12-bit parallel bus, eliminating the need for an external multiplexer or sample/hold. With software-selectable 0V to +VREF or 0V to +5V input ranges, the MAX198BENI accommodates thermocouple, RTD, and pressure transducer signal chains. The integrated 4.096V reference (5 ppm/°C typical) provides the DAC excitation and ADC reference from a single IC, reducing BOM cost in factory-floor systems.
Recommended
Multi-Channel Data Logging Systems
The MAX198BENI's 12-bit resolution at 100 ksps and 6 input channels suit multi-channel data loggers recording temperature, pressure, humidity, and flow simultaneously from multiple sensors. The MAX198BENI samples at 100 ksps aggregate, which yields approximately 16.6 ksps per channel when time-multiplexed across all 6 inputs - sufficient for most mechanical and thermal data acquisition tasks. The internal track-and-hold captures fast transient signals up to the Nyquist limit, while the parallel microprocessor interface allows a microcontroller or DSP to read conversions in a single bus cycle. The MAX198BENI's NRND status makes long-term sourcing for data logger production runs worth evaluating against the MAX198BCNI+ alternative.
Recommended
Medical Patient Monitoring Equipment
In medical patient monitoring equipment, the MAX198BENI serves as the analog front-end digitizing ECG, SpO2, temperature, and respiration signals from multiple isolated sensor channels. The MAX198BENI's 12-bit resolution is sufficient for diagnostic-grade vitals capture when paired with external instrumentation amplifiers, while its 6 channels consolidate multiple sensor inputs into a single chip. The MAX198BENI's fault-protected ±16V inputs tolerate defibrillator discharge transients that propagate through patient isolation barriers. Designers targeting FDA-compliant systems should verify the NRND status and consider MAX198BCNI+ for new medical product introductions.
Recommended
HVAC and Building Automation Sensor Interfaces
The MAX198BENI's integrated multiplexer and ±16V fault protection suit HVAC and building automation systems where multiple temperature, pressure, CO2, and humidity sensors share a common ADC. The MAX198BENI handles 6 sensor inputs from a single +5V supply, replacing discrete op-amp + ADC designs. Its unipolar 0V to +5V input range maps directly to common HVAC transducers with 0-5V or 0-10V (with divider) output stages. The MAX198BENI's industrial -40°C to +85°C operating range matches HVAC equipment environmental requirements, and its parallel interface eases connection to BACnet or Modbus gateway controllers.
Recommended
Automotive Diagnostic and Test Equipment
The MAX198BENI's 6-channel input multiplexer and wide input range make it suitable for automotive diagnostic equipment that monitors multiple analog sensor outputs simultaneously - including O2 sensor, MAP sensor, MAF sensor, throttle position, and coolant temperature signals. The MAX198BENI samples at 100 ksps aggregate, enough for engine control diagnostic work. Although not AEC-Q100 qualified itself, the MAX198BENI is widely used in off-vehicle bench-top test fixtures and factory-end-of-line testers where automotive temperature and EMI environments are simulated. Designers needing on-vehicle qualification should migrate to AEC-Q100-qualified successors.
Recommended
Instrumentation Front-End for Test & Measurement
The MAX198BENI is well-suited as the analog front-end for bench-top test and measurement instruments such as multimeters, oscilloscope front-ends, and signal analyzers that need to digitize multiple signal sources simultaneously. The MAX198BENI's 12-bit resolution and 100 ksps throughput support mid-frequency measurement tasks, while its parallel interface enables real-time data streaming to an FPGA or DSP for waveform analysis. The MAX198BENI's fault protection simplifies the input protection network in commercial test instruments exposed to unknown user signals. The integrated 4.096V reference (5 ppm/°C) provides stable conversion accuracy for laboratory-grade measurements.
Recommended
Recommended Products Summary
Engineering reference data for MAX198BENI — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX198BCNI+ | MAX198AENI+ | MAX198ACNI+ | MAX198BCAI |
|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 28-PDIP (N) | 28-PDIP (N) - same | 28-PDIP (N) - same | 28-PDIP (N) - same | 28-PDIP (N) - same |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 12 bit |
| Sampling Rate | 100 ksps | 100 ksps | 100 ksps | 100 ksps | 100 ksps |
| Channels | 6 single-ended | 6 single-ended | 6 single-ended | 6 single-ended | 6 single-ended |
| Linearity (INL/DNL) | ±1/2 LSB (B grade) | ±1/2 LSB (B grade) | ±1 LSB (A grade) | ±1 LSB (A grade) | ±1/2 LSB (B grade) |
| Input Range | 0V to +VREF or 0V to +5V | 0V to +VREF or 0V to +5V | 0V to +VREF or 0V to +5V | 0V to +VREF or 0V to +5V | 0V to +VREF or 0V to +5V |
| Fault-Protected Inputs | ±16 V | ±16 V | ±16 V | ±16 V | ±16 V |
| RoHS Compliant | no (BENI suffix) | yes | yes | yes | yes |
Key Differentiators
- RoHS lead-free replacement available from same Maxim family (vs MAX198BENI vs MAX198BCNI+)
- Lower-cost A-grade linearity option available (vs MAX198BENI vs MAX198AENI+)
- Surface-mount alternative available without changing the die (vs MAX198BENI vs MAX198BCAI)
Design Notes
Estimated: place a 0.1µF ceramic decoupling capacitor within 10mm of the VDD pin (pin 7) and a 10µF bulk tantalum or ceramic capacitor at the supply entry point. The MAX198BENI draws typically 6mA quiescent current; the analog and digital grounds should be joined at a single point near the AGND pin (pin 8) to prevent digital switching noise from coupling into the analog reference path.
Route the 12-bit parallel data bus (D0-D11) with matched trace lengths to avoid bus skew, since the read cycle is asynchronous and a slow bit could latch incorrectly. Keep analog input traces (CH0-CH5) away from digital bus traces; use a guard ground trace between them if PCB space allows. The MAX198BENI's internal reference requires REFADJ (pin 10) to be bypassed to AGND with a 0.01µF capacitor for low-noise operation.
Source impedance on the analog input should not exceed 1kΩ at 100 ksps to avoid conversion error; add an external buffer amplifier if your sensor output impedance is higher. The MAX198BENI unipolar input range cannot accept negative voltages - signals below 0V will damage the input or produce erroneous readings; use the MAX199 if you need bipolar input capability. The HBEN signal must be properly sequenced with RD to read the correct byte.
Compliance Information
MAX198BENI has the historical non-RoHS 'BENI' suffix; the MAX198BCNI+ is the RoHS lead-free drop-in alternative. Not AEC-Q100 qualified - choose automotive-grade successors for on-vehicle designs.