MAX181CCPL - 12-Bit 8-Ch 100ksps DAS | Maxim Integrated
MPN: MAX181CCPL ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.95 | $9.95 |
| 10 | $8.96 | $89.60 |
| 100 | $7.95 | $795.00 |
| 500 | $6.85 | $3,425.00 |
| 1,000 | $5.95 | $5,950.00 |
MAX181CCPL Overview
What is a Data-Acquisition System? A DAS is a mixed-signal integrated circuit that combines an analog front end (multiplexer, sample-and-hold, and ADC) with digital control logic in a single chip, replacing the discrete ADC-plus-mux-plus-reference designs of the past. Within the broader converter hierarchy, a DAS sits above stand-alone ADCs and below full system-on-chip solutions; MAX181-class devices belong to the successive-approximation register (SAR) ADC family, prized for deterministic latency and ease of microprocessor interfacing. By integrating the reference and analog switches, Maxim's DAS parts reduce board area, lower BOM cost, and remove the burden of matching discrete analog stages.
Key features of the MAX181CCPL include 12-bit resolution with ±½ LSB linearity (typical), an on-chip 5 V reference (with external override option), software-configurable unipolar/bipolar input ranges (0 V to 5 V or ±5 V / ±10 V / 0 V to 10 V depending on external scaling), and a hardware-mode or software-mode channel scan sequencer. The device also offers an interrupt output at end-of-conversion, low power dissipation (~75 mW typical at 100 ksps), and single +5 V operation. The 40-pin PDIP footprint remains compatible with legacy through-hole test fixtures and breadboard prototypes.
Architecturally, the MAX181CCPL uses a charge-redistribution successive-approximation ADC core with a capacitive DAC, which provides inherent sample-and-hold action and eliminates the need for an external SHA. The on-chip precision reference is laser-trimmed at the factory, and an external reference pin allows system designers to substitute higher-accuracy or ratiometric references when required. The parallel interface supports either 8-bit (two read cycles) or 16-bit (single read) data transfer, with chip-select and read-strobe handshaking that map directly to 8051, 68HC11, and similar MCU buses.
Typical applications include industrial process-control front ends, multi-channel data loggers, instrumentation front panels, and portable test equipment. The 8-channel count suits it for monitoring thermocouple banks, RTD arrays, strain-gauge bridges, and 4 mA to 20 mA current-loop sensors. Designers also use the MAX181CCPL in legacy microprocessor-based factory automation cards where a parallel-bus ADC eliminates the need for an SPI/QSPI peripheral.
When designing with the MAX181CCPL, pay attention to analog-input protection: the analog inputs can be damaged by overvoltage transients, so series resistors and clamping diodes networks are recommended for industrial applications. Also, because the part uses a successive-approximation core, the analog input must remain stable during the conversion window (typically 8 µs to 10 µs); if the source impedance is too high, add an external buffer to avoid conversion errors.
This page synthesizes distributor pricing, drop-in Maxim Integrated alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for MAX181CCPL — 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 MAX181CCPL (same form factor and footprint) — differing in Package, Resolution, Input Type, Mounting Type, Operating Temperature Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MAX181CCPL+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX181CEPL+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX181BCPL+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX181AEPL+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX181ACPL+
✅ Drop-In📋 Reference alternative (not in catalog)
MAX181CCPL Maximum Ratings & Electrical Characteristics
| Resolution | 12 bits |
| Number of Analog Input Channels | 8 |
| Sampling Rate | 100 ksps |
| ADC Architecture | Successive Approximation (SAR) |
| Input Type | Single-Ended, Multiplexed |
| Data Interface | Parallel (Word Access) |
| Supply Voltage | +5 V single supply |
| On-Chip Reference | Yes (5 V, internal) |
| Sample-and-Hold | Internal (Track/Hold) |
| Operating Temperature Range | 0°C to +70°C (Commercial 'C' grade) |
| Package | PDIP-40 (Plastic DIP, 0.600 inch / 15.24 mm) |
| Mounting Type | Through-Hole |
| Temperature Grade | Commercial |
| Power Dissipation (typ) | 75 mW at 100 ksps |
MAX181CCPL pdip-40 (plastic dip, 0.600 inch / 15.24 mm) Pin Configuration Guide
Pin configuration for MAX181CCPL (pdip-40 (plastic dip, 0.600 inch / 15.24 mm) package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for MAX181CCPL.
Refer to the datasheet for full pin configuration.
Typical Applications
MAX181CCPL is suitable for 6 applications: Industrial Process Control Front End, Multi-Channel Data Logger, Instrumentation Front Panel, Legacy Microprocessor-Based Factory Card, Portable Test Equipment, Strain-Gauge / Bridge Transducer Reader.
Industrial Process Control Front End
The MAX181CCPL is a strong fit for industrial process-control front ends because it integrates 8 single-ended analog inputs, an internal track/hold, and an internal 5 V reference in a single PDIP-40 IC. With 12-bit resolution (4,096 codes) and 100 ksps throughput, the device easily digitizes thermocouple banks, RTD arrays, and 4-20 mA current-loop sensors after external signal conditioning. The parallel microprocessor interface maps directly to 8051, 68HC11, and similar legacy MCU buses, eliminating the need for an SPI peripheral in factory-automation cards. Compared to a discrete ADC-plus-mux-plus-reference design, the MAX181CCPL reduces board area by roughly 40% and removes the burden of matching analog stages. The 100 ksps rating is more than sufficient for process-control scan rates of 1 Hz to 1 kHz per channel after round-robin distribution.
Recommended
Multi-Channel Data Logger
Portable multi-channel data loggers benefit from the MAX181CCPL's single +5 V supply operation and 75 mW typical power dissipation, which simplify battery-powered and USB-powered designs. The 8 input channels can monitor a mix of slow-changing analog signals (temperature, voltage, current) by time-multiplexing through the on-chip analog mux. The 100 ksps burst rate allows the host microcontroller to sample all 8 channels in under 1 ms, then enter a low-power sleep state between scan intervals, dramatically extending battery life. The parallel interface is fast enough to keep pace with the ADC without inserting wait states on most MCUs. Engineers building SD-card or flash-based loggers often pair the MAX181CCPL with a small RISC MCU and a precision external reference for ratiometric measurements.
Recommended
Instrumentation Front Panel
Bench instruments and rack-mounted test equipment often require a front-panel ADC subsystem that can digitize multiple transducer signals and present readings on a local display. The MAX181CCPL fits this role with 12-bit resolution sufficient for 3-1/2 digit panel meters (where 12 bits = 4096 counts, exceeding the 2000-count display range with margin). The 8 single-ended inputs can be configured for differential operation in pairs, supporting bridge-type transducers such as strain gauges and load cells. The on-chip reference simplifies calibration: designers use the internal 5 V reference for absolute measurements or override with an external MAX6350 for higher accuracy. The DIP-40 footprint also enables through-hole assembly for low-volume, hand-soldered prototypes used in R&D labs.
Recommended
Legacy Microprocessor-Based Factory Card
Industrial PCs and legacy PLCs based on 8-bit and 16-bit microprocessors (8051, 68HC11, Z80) often need a parallel-interface ADC card because the host lacks an SPI or I2C peripheral. The MAX181CCPL directly maps to these bus architectures with its 12-bit parallel data port, chip-select input, and read-strobe handshake. The 8 analog inputs allow a single IC to monitor up to 8 sensors per card slot, reducing slot count and BOM cost in PLC racks. The +5 V single supply operation aligns with the digital logic rail of legacy microprocessors, eliminating the need for level translation. Engineers maintaining installed-base equipment find the DIP-40 package particularly serviceable in the field because through-hole parts can be replaced without specialized rework stations.
Recommended
Portable Test Equipment
Handheld multimeters, field service testers, and battery-powered diagnostic equipment benefit from the MAX181CCPL's integrated 8-channel mux and parallel readback architecture. At 100 ksps burst rate, the device can digitize a transient event (such as a relay-contact bounce or a switched-mode power-supply startup surge) and stream the captured waveform to a host processor. The internal 5 V reference eliminates one external component, shrinking the BOM and reducing the chance of reference-related errors in field-deployed units. The commercial 0°C to +70°C range suits most indoor and mild outdoor environments; for harsher conditions, the MAX181CEPL extended-grade variant is preferred. The DIP-40 package also simplifies field-repair and reduces rework cost compared to fine-pitch QFN alternatives.
Recommended
Strain-Gauge / Bridge Transducer Reader
Strain gauges, load cells, and pressure transducers typically produce low-level differential signals that must be digitized with high resolution and adequate common-mode rejection. The MAX181CCPL can be configured for pseudo-differential operation by pairing its 8 single-ended inputs as 4 differential channels, doubling as a bridge transducer reader for 4 load cells per chip. The 12-bit resolution provides 4,096 counts, sufficient for 0.1% full-scale measurements when paired with low-noise instrumentation amplifiers on the front end. The on-chip reference supports ratiometric measurement when paired with an external excitation supply, eliminating absolute-accuracy errors. Engineers building weighing scales, force-test rigs, and pressure monitoring systems use the MAX181CCPL to balance cost (parallel-interface legacy support) against integration (no external mux or reference needed).
Recommended
Recommended Products Summary
Engineering reference data for MAX181CCPL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX181CCPL+ | MAX181CEPL+ | MAX181BCPL+ | MAX181AEPL+ | MAX181ACPL+ |
|---|---|---|---|---|---|---|
| Package | PDIP-40 (through-hole) | PDIP-40 - same | PDIP-40 - same | PDIP-40 - same | PDIP-40 - same | PDIP-40 - same |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Sampling Rate | 100 ksps | 100 ksps | 100 ksps | 100 ksps | 100 ksps | 100 ksps |
| Number of Channels | 8 single-ended | 8 single-ended | 8 single-ended | 8 single-ended | 8 single-ended | 8 single-ended |
| Operating Temperature | 0°C to +70°C (Commercial) | 0°C to +70°C (Commercial) | -40°C to +85°C (Extended) | 0°C to +70°C (Commercial) | -40°C to +85°C (Extended) | 0°C to +70°C (Commercial) |
| Interface | Parallel (Word Access) | Parallel (Word Access) | Parallel (Word Access) | Parallel (Word Access) | Parallel (Word Access) | Parallel (Word Access) |
| Supply Voltage | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single | +5 V single |
| Lifecycle Status | NRND | Active (RoHS variant) | Active | NRND | NRND | NRND |
Key Differentiators
- Single-chip 8-channel DAS with integrated reference and track/hold (vs MAX181CCPL+ (RoHS variant))
- Commercial temperature grade suited for indoor equipment (vs MAX181CEPL+ (extended -40C to +85C grade))
- Parallel microprocessor interface for legacy MCU support (vs MAX1302 (SPI 12-channel successor))
Design Notes
The MAX181CCPL analog inputs can be damaged by overvoltage transients exceeding ±15 V; in industrial environments, add series resistors (typically 1 kΩ to 10 kΩ) and clamping diodes networks (e.g., BAV99 or TVS diodes to VDD/GND) on each analog input. Without protection, ESD events or nearby switching transients can permanently damage the input multiplexer. Also note that the device uses a successive-approximation architecture: the analog input must remain stable during the ~8 µs to 10 µs conversion window. If source impedance is high (>5 kΩ), buffer the input with an external op-amp to avoid conversion errors.
Bypass VDD with a 0.1 µF ceramic capacitor placed within 5 mm of the supply pin, in parallel with a 10 µF tantalum or aluminum electrolytic bulk capacitor. The internal +5 V reference also requires a 0.1 µF ceramic bypass on the REF pin to minimize reference-induced noise. The MAX181CCPL power dissipation is ~75 mW during 100 ksps conversion; for battery-powered designs, gate the conversion clock or use software-mode single-shot conversion to reduce average power. Estimated: total quiescent plus conversion current at +5 V is approximately 15 mA, yielding the ~75 mW figure.
Keep analog input traces short and routed away from digital lines (data bus, read/write strobes, clock) to minimize crosstalk. Use a single-point ground star topology with the AGND pin tied to a quiet analog ground island; the DGND pin connects to the digital ground plane. Place a ferrite bead or small inductor between analog and digital supplies if the +5 V rail is shared with noisy digital circuitry. The PDIP-40 footprint allows easy hand-wiring on prototype boards, but for production volume, consider migrating to the SO-28 or PLCC-44 surface-mount variants of the same MAX181 family.
Route the parallel data bus (D0-D11), chip select (CS), read (RD), and interrupt (INT) traces with matched lengths if the bus runs above 1 MHz to avoid timing skew. The MAX181CCPL parallel interface supports both 8-bit (two read cycles) and 16-bit (single read) data transfer; ensure the host processor firmware selects the correct mode by tying the BYTE/8BIT pin accordingly. Decouple the analog reference pin with both a 0.1 µF ceramic and a 10 µF electrolytic to maintain reference stability across temperature.
For multi-channel scanning, allow adequate acquisition time (typically 2 µs to 4 µs) after switching the analog mux before triggering a conversion. The internal track/hold has a finite acquisition aperture, and switching the mux too close to the conversion start can introduce channel-to-channel crosstalk. If scanning all 8 channels at the maximum 100 ksps aggregate rate, the per-channel throughput drops to 12.5 ksps, which is still ample for thermocouple and process-control scan rates.
Compliance Information
RoHS and REACH compliance status not explicitly stated in verified web data for MAX181CCPL (non '+' variant). The MAX181CCPL+ is the lead-free RoHS-compliant variant per Mouser product listing. AEC-Q100 not applicable - this is a commercial/industrial-grade data acquisition IC, not automotive-grade.
