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Analog Devices Inc./Maxim Integrated MAX186CEPP
- Part No.:
- MAX186CEPP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX186CEPP.pdf
- Description:
- IC ADC 12BIT SAR 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,896
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Product details
Overview
MAX186CEPP from Maxim Integrated is a low-power, 12-bit successive-approximation analog-to-digital converter (ADC) with integrated 8-channel multiplexer, track/hold, and SPI-/QSPI-/MICROWIRE-compatible 4-wire serial interface. It operates from a single +5V supply or dual ±5V supplies, features an internal 4.096V reference, software-configurable unipolar/bipolar and single-ended/differential inputs, and delivers 133ksps sampling rate with ±1.0 LSB relative accuracy - used in portable data loggers and battery-powered medical instruments.
For engineers reviewing the MAX186CEPP datasheet, MAX186CEPP pinout, MAX186CEPP application, or MAX186CEPP equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support for industrial embedded and OEM deployment.
Technical Context
The MAX186CEPP implements a capacitive DAC-based successive-approximation architecture with integrated track/hold circuitry, supporting both internal clock mode (up to 10MHz serial readout) and external clock mode (2MHz typical, 15-clock conversion cycle). Its analog front-end accepts up to eight single-ended or four differential inputs, with input common-mode range spanning VSS to VDD and ±0.5 LSB channel-to-channel offset matching over temperature.
It integrates a reference-buffer amplifier with internal compensation (SHDN = high) or external 4.7µF bypass (SHDN = open), enabling precise gain trim via REFADJ. The device supports two software-selectable power-down modes - fast (30µA) and full (2µA) - and automatically powers up on serial interface access, enabling per-conversion shutdown for ultra-low average current in intermittent-sampling systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1:4096 quantization granularity for high-accuracy sensor digitization |
| Sampling Rate | 133ksps - enables real-time capture of signals up to ~66kHz (Nyquist-limited) without undersampling |
| Relative Accuracy | ±1.0 LSB - ensures monotonicity and <0.025% full-scale error after calibration |
| Supply Current | 1.5mA (active), 2µA (full power-down) - allows >100-hour operation on coin-cell batteries in sleep-wake cycles |
| Reference | Internal 4.096V ±0.5% - eliminates need for external precision reference and reduces BOM count |
| Input Configuration | 8-channel SE or 4-channel diff - supports flexible multi-sensor monitoring with shared signal chain |
| Serial Interface | SPI/QSPI/MICROWIRE/TMS320-compatible 4-wire - interoperates directly with common microcontrollers without level shifters or glue logic |
Pinout & Package
MAX186CEPP is housed in a 20-pin plastic DIP (PDIP) package with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch, compatible with standard prototyping and production PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog input channels | Software-selectable single-ended or differential inputs; CH0–CH7 support 8:1 MUX routing into T/H stage |
| VSS (Pin 9) | Negative supply rail | Accepts 0V (unipolar) or –5V ±5% (bipolar); defines analog input lower bound and reference return |
| SHDN (Pin 10) | Three-level shutdown control | Low = 10µA shutdown; high = internal compensation; open = external compensation (4.7µF at VREF) |
| VREF (Pin 11) | Reference voltage node | Outputs 4.096V (MAX186 only); also serves as buffered reference input when external source applied |
| REFADJ (Pin 12) | Reference buffer gain adjust | Connect to VDD to disable buffer; otherwise sets VREF = 1.678 × REFADJ for fine gain calibration |
| AGND (Pin 13) | Analog ground reference | Return for analog inputs and internal reference; must be separated from DGND to minimize noise coupling |
| DGND (Pin 14) | Digital ground reference | Return for serial interface and logic; tied to AGND at single point to prevent ground loops |
| DOUT (Pin 15) | Serial data output | 3-state MSB-first output synchronized to SCLK falling edge; high-impedance when CS = high |
| SSTRB (Pin 16) | Serial strobe indicator | Pulses high before MSB in external clock mode; goes low-then-high during conversion in internal clock mode |
| DIN (Pin 17) | Serial data input | Accepts 8-bit control byte on SCLK rising edge; first "1" bit after CS fall initiates command parsing |
| CS (Pin 18) | Chip select enable | Active-low; enables serial interface and powers up device; disables DOUT/SSTRB outputs when high |
| SCLK (Pin 19) | Serial clock input | Drives data transfer and (in external mode) conversion timing; duty cycle 40–60% required |
| VDD (Pin 20) | Positive supply rail | +5V ±5%; powers analog and digital sections; decoupling capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| Integrated track/hold | Eliminates need for external hold capacitor; acquisition time fixed at 1.5µs regardless of source impedance ≤5kΩ |
| Software-configurable input mode | Single control byte selects unipolar/bipolar and single-ended/differential operation - no hardware changes needed |
| Per-conversion power management | Auto-wakeup on CS assertion + 2µA full shutdown enables µA-average current in burst-sampling applications |
| Reference buffer with gain trim | REFADJ pin allows ±1.5% adjustment of VREF; internal gain of 1.678 enables precise system-level calibration |
| Robust analog input protection | Clamp diodes allow safe overvoltage to VSS −0.3V / VDD +0.3V; input leakage <±1µA ensures minimal loading on high-Z sensors |
Applications
| Portable Data Logging | Medical Instrumentation |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure at 10Hz intervals. IC Role / Device Role / Timing Role: ADC front-end acquiring conditioned analog signals from multiple transducers via its 8-channel MUX and internal reference. Use Value: 1.5mA active current and 2µA shutdown extend coin-cell life beyond 2 years; internal 4.096V reference ensures consistent full-scale across units without calibration. |
Use Scenario: Portable ECG monitor digitizing lead-II differential biopotential signals with 12-bit resolution and low noise floor. IC Role / Device Role / Timing Role: Precision analog front-end converting amplified, filtered bio-signals using pseudo-differential mode and bipolar input range. Use Value: ±1.0 LSB relative accuracy and −85dB channel crosstalk preserve diagnostic fidelity; 133ksps sampling supports >50kHz alias-free bandwidth with anti-alias filtering. |
| Industrial Process Control | Automated Test Equipment |
Use Scenario: PLC analog input module measuring 4–20mA current loops and thermocouple outputs across 8 field channels. IC Role / Device Role / Timing Role: Multi-channel data acquisition subsystem performing sequential conversions with software-selected gain and polarity. Use Value: Single +5V operation simplifies power design; unipolar/bipolar configurability accommodates diverse sensor types without board variants. |
Use Scenario: Benchtop multimeter capturing transient voltage waveforms with 12-bit resolution and 133ksps sustained rate. IC Role / Device Role / Timing Role: High-speed serial ADC interfacing to FPGA controller via SPI, delivering streaming samples with deterministic latency. Use Value: Internal clock mode enables flexible readout timing independent of conversion start; SSTRB signal provides precise conversion completion indication. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit, 200ksps, SPI-only interface, no internal reference, requires external 2.5V ref | Higher speed but lacks bipolar mode and integrated reference; needs additional ref IC and layout space | Select when higher throughput and external reference already exist; avoid if minimizing BOM or supporting bipolar inputs |
| MAX11131EUB+ | 12-bit, 500ksps, internal 2.048V ref, SPI/QSPI/MICROWIRE, 10-pin µMAX package | Smaller footprint and faster, but only 1 channel; no multiplexer or software-configurable input polarity | Select for single-channel, space-constrained designs requiring >133ksps; not suitable for multi-sensor MUX applications |
Compared with MAX186CEPP, ADS7822U offers higher speed but increases system complexity with external reference dependency, while MAX11131EUB+ trades channel count and flexibility for size and speed - making MAX186CEPP optimal for cost-sensitive, multi-input, battery-operated systems needing integrated reference and programmable configuration.
Availability
MAX186CEPP is available at Aetrix Electronics and suitable for portable instrumentation, industrial process monitoring, and medical diagnostics requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant through-hole packaging.
Supply support for MAX186CEPP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications, emphasizing integration, low power, and reliability.
The MAX186CEPP belongs to Maxim's legacy data-acquisition product line, engineered specifically for low-power, multi-channel, serial-interface ADC applications in resource-constrained embedded systems where board space, power budget, and BOM simplicity are critical.
FAQ
What is the operating temperature range for MAX186CEPP?
The MAX186CEPP is specified for commercial-grade operation from 0°C to +70°C. This range is defined by the 'C' suffix in the part number and aligns with the MAX186_C series electrical characteristics tables. It is suitable for indoor, non-automotive, and non-military environments where ambient temperatures remain within this band. The device maintains ±1.0 LSB relative accuracy and 133ksps performance across the full 0°C to +70°C span without derating.
Does MAX186CEPP require an external reference voltage?
No, the MAX186CEPP includes an internal 4.096V reference and does not require an external reference. This is a defining distinction from the MAX188 family. The internal reference is buffered and adjustable via the REFADJ pin, enabling system-level gain calibration. External reference use is optional and only applicable when overriding the internal reference - for example, to match a system's master reference or achieve tighter initial tolerance.
How many analog input channels does MAX186CEPP support, and how are they configured?
The MAX186CEPP supports eight analog input channels (CH0–CH7), configurable in either 8-channel single-ended or 4-channel pseudo-differential mode via software control bits in the 8-bit command byte. Channel selection and input mode (unipolar/bipolar, single-ended/differential) are set dynamically per conversion - no hardware reconfiguration is needed. The internal multiplexer routes selected inputs to the shared track/hold and ADC core.
What power-down modes are available on MAX186CEPP, and what are their current draws?
The MAX186CEPP offers two software-selectable power-down modes controlled by PD1/PD0 bits in the command byte: fast power-down (30µA typical) and full power-down (2µA maximum). Additionally, a hard-wired SHDN pin provides hardware-initiated shutdown to <10µA. All modes retain register state and allow immediate wake-up on CS assertion, enabling per-conversion power gating to reduce average supply current in intermittent-sampling systems.
Is MAX186CEPP pin-compatible with other packages in the MAX186 family?
Yes, the MAX186CEPP (20-pin PDIP) shares identical pinout and electrical functionality with the SO (MAX186CWP+) and SSOP (MAX186CAP+) variants of the MAX186 family. All three packages use the same 20-pin mapping, signal definitions, timing specifications, and command protocol - allowing direct PCB footprint substitution between packages without schematic or firmware changes, provided mechanical constraints permit.
MAX186CEPP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 133k
- Number of Inputs:
- 4, 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- ±5V, 5V
- Voltage - Supply, Digital:
- ±5V, 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX186CEPP FAQ
1.How can I place an order for MAX186CEPP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX186CEPP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX186CEPP reliable?
The price and inventory of MAX186CEPP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX186CEPP is usually 5 days.
3.What payment methods are accepted for MAX186CEPP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX186CEPP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX186CEPP?
MAX186CEPP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX186CEPP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX186CEPP?
For technical support, including MAX186CEPP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX186CEPP requirements.
6.How does Aetrix verify that MAX186CEPP is sourced from the original manufacturer or authorized distributors?
All MAX186CEPP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX186CEPP meets industry standards.
7.What is the process for return or replacement of MAX186CEPP?
All MAX186CEPP units undergo pre-shipment inspection (PSI). If there is an issue with MAX186CEPP, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX186CEPP part is unused and in its original packaging.
Return procedure for MAX186CEPP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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