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Analog Devices Inc./Maxim Integrated MAX186BEPP
- Part No.:
- MAX186BEPP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX186BEPP.pdf
- Description:
- IC ADC 12BIT SAR 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,145
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Product details
Overview
MAX186BEPP 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, supports software-configurable unipolar/bipolar and single-ended/differential inputs, and features an internal 4.096V reference. It delivers 133ksps sampling rate with ±1.0 LSB relative accuracy and 70dB SINAD, targeting portable data logging and battery-powered instrumentation.
For engineers reviewing the MAX186BEPP datasheet, MAX186BEPP pinout, MAX186BEPP application, or MAX186BEPP equivalent, this page provides verified technical context, exact pin functions, real-world use cases in medical and industrial sensing, and two confirmed alternative ADCs with documented functional trade-offs for design-in decisions.
Technical Context
The MAX186BEPP implements a capacitive DAC-based successive-approximation architecture with integrated track/hold circuitry, enabling acquisition in 1.5µs and conversion in 6µs using a 2MHz external clock. Its analog front-end supports pseudo-differential input pairs (CH0/CH1, CH2/CH3, etc.) and full-scale ranges of 0V to +4.096V (unipolar) or ±2.048V (bipolar), with channel-to-channel crosstalk at –85dB.
It uses a 4-wire serial interface where SCLK clocks data on rising edges (DIN) and falling edges (DOUT), CS enables communication, and SSTRB provides strobe timing-low during conversion in internal-clock mode, pulsed before MSB output in external-clock mode. The SHDN pin supports three-level control: low for full power-down (≤2µA), high for internal compensation, open for external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes across full-scale range |
| Sampling Rate | 133ksps - supports real-time monitoring of signals up to ~66kHz via Nyquist criterion |
| Relative Accuracy | ±1.0 LSB - ensures monotonicity and <0.025% full-scale error after calibration |
| Supply Current | 1.5mA (active), ≤2µA (full power-down) - enables microamp-level sleep between conversions |
| Reference | Internal 4.096V - eliminates need for external precision reference in most applications |
| Input Configuration | 8-channel SE or 4-channel differential - reduces external signal conditioning components |
| SINAD | 70dB - supports >11 effective bits for medium-fidelity sensor digitization |
Pinout & Package
MAX186BEPP is packaged in a 20-pin plastic DIP (PDIP) with 0.3-inch width, RoHS-compliant and lead-free per + suffix designation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog input channels | Accept single-ended (vs. AGND) or differential (paired) signals; support software-selectable unipolar/bipolar ranges |
| VSS (Pin 9) | Negative supply rail | Connects to –5V or AGND; defines lower bound of analog input common-mode range (VSS to VDD) |
| SHDN (Pin 10) | Three-state shutdown control | Pull low → 2µA shutdown; leave open → external compensation; pull high → internal compensation mode |
| VREF (Pin 11) | Reference voltage node | Outputs 4.096V (MAX186); also serves as buffer output or external reference input when configured |
| REFADJ (Pin 12) | Reference buffer gain adjust | Connect to VDD to disable buffer; otherwise sets VREF = 1.678 × REFADJ for fine-tuning |
| AGND (Pin 13) | Analog ground reference | Return path for analog inputs and reference circuitry; must be separated from DGND for noise immunity |
| DGND (Pin 14) | Digital ground reference | Return for digital I/O; isolation from AGND prevents digital switching noise from corrupting conversions |
| DOUT (Pin 15) | Serial data output | MSB-first 12-bit result; high-impedance when CS is high; timed to SCLK falling edge |
| SSTRB (Pin 16) | Serial strobe output | Signals conversion start/end: low during conversion (internal clock) or pulses before MSB (external clock) |
| DIN (Pin 17) | Serial data input | Receives 8-bit control byte defining channel, mode, and clock/power-down selection |
| CS (Pin 18) | Chip select | Active-low enable for serial interface; disables DOUT/SSTRB outputs when high |
| SCLK (Pin 19) | Serial clock input | Clocks DIN (rising edge) and DOUT (falling edge); sets conversion speed in external-clock mode |
| VDD (Pin 20) | Positive supply rail | +5V ±5%; powers analog and digital sections; PSR of ±0.06mV/V ensures stability against supply ripple |
Key Features
| Feature | Design Value |
|---|---|
| Integrated track/hold | Eliminates need for external hold capacitor and simplifies layout for high-speed sampling |
| Software-configurable input modes | Single control byte selects unipolar/bipolar and single-ended/differential operation per conversion |
| Three-level SHDN control | Enables dynamic power management: full shutdown (2µA), fast wake-up (30µA), or reference buffer tuning |
| SPI/QSPI/MICROWIRE compatibility | Direct interface to common microcontroller peripherals without level shifters or glue logic |
| Internal 4.096V reference | Provides stable, factory-trimmed reference with ±30ppm/°C tempco and <2.5mV load regulation |
Applications
| Portable Data Logging | Medical Instrumentation |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure over days. IC Role / Device Role / Timing Role: Primary ADC acquiring multi-channel analog sensor outputs with minimal power overhead between samples. Use Value: 2µA shutdown current extends battery life; internal reference removes BOM cost and layout area for external reference IC. |
Use Scenario: Portable ECG monitor digitizing low-amplitude biopotential signals from electrode pairs. IC Role / Device Role / Timing Role: Differential-input ADC rejecting common-mode noise while maintaining 12-bit resolution for waveform fidelity. Use Value: –85dB channel crosstalk prevents interference between leads; 70dB SINAD preserves diagnostic signal integrity. |
| Industrial Process Control | Automatic Test Equipment |
|
Use Scenario: PLC analog input module measuring 4–20mA current loops and thermocouple outputs in factory automation. IC Role / Device Role / Timing Role: Precision front-end ADC supporting bipolar input ranges and programmable gain via external op-amps. Use Value: ±1.0 LSB relative accuracy meets Class 0.1 industrial measurement standards; ±5V dual-supply operation accommodates wide signal swings. |
Use Scenario: Benchtop ATE system performing rapid parametric testing of analog ICs and passive components. IC Role / Device Role / Timing Role: High-throughput ADC capturing transient responses and settling behavior under controlled stimulus conditions. Use Value: 133ksps sampling rate enables sub-8µs per-sample capture; 4.5MHz small-signal bandwidth supports undersampling of fast transients. |
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 | Better speed but higher system complexity due to external reference and tighter layout requirements | Choose when sampling rate >133ksps is mandatory and board space allows external reference design |
| MAX11131AUT+ | 12-bit, 500ksps, internal reference, SPI/QSPI compatible, 10-pin µMAX package | Higher speed and smaller footprint, but lacks multi-channel mux and differential input flexibility | Choose for space-constrained designs needing faster throughput, accepting single-channel or external mux requirement |
Compared with MAX186BEPP, ADS7822U trades internal reference simplicity for higher speed and external reference dependency, while MAX11131AUT+ offers greater throughput and integration density but sacrifices 8-channel multiplexing and differential pair configuration-making MAX186BEPP optimal for multi-sensor, low-power, mixed-input industrial and portable systems.
Availability
MAX186BEPP is available at Aetrix Electronics and suitable for portable data logging, medical instrumentation, and industrial process control requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for MAX186BEPP 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) is a semiconductor company specializing in high-performance analog and mixed-signal ICs for industrial, medical, and communications applications.
The MAX186 family was designed specifically for low-power, multi-channel data acquisition in space- and energy-constrained systems, emphasizing integration of mux, T/H, reference, and serial interface in a single 20-pin package.
FAQ
What is the operating temperature range for MAX186BEPP?
The MAX186BEPP is rated for –40°C to +85°C operation, matching the MAX186_E grade specification. This extended industrial temperature range ensures reliable performance in harsh environments such as factory floors, outdoor instrumentation, and automotive under-hood monitoring systems where thermal stability is critical. The MAX186BEPP maintains its ±1.0 LSB relative accuracy and 70dB SINAD across this full range.
Does MAX186BEPP require an external reference voltage?
No, MAX186BEPP does not require an external reference voltage because it integrates a factory-trimmed 4.096V internal reference with ±30ppm/°C temperature coefficient and <2.5mV load regulation. This internal reference eliminates BOM cost and PCB area associated with external references, simplifying design for portable and battery-powered applications where MAX186BEPP is commonly deployed.
How many analog input channels does MAX186BEPP support?
MAX186BEPP supports eight analog input channels (CH0–CH7), configurable either as eight single-ended inputs referenced to AGND or as four differential input pairs (CH0/CH1, CH2/CH3, CH4/CH5, CH6/CH7). Channel selection is controlled via a software-programmable 3-bit field in the 8-bit serial control byte, enabling flexible signal routing without external multiplexer hardware.
What serial interface protocols is MAX186BEPP compatible with?
MAX186BEPP is natively compatible with SPI, QSPI, and MICROWIRE serial protocols using its 4-wire interface (CS, SCLK, DIN, DOUT). It requires CPOL = 0 and CPHA = 0 for SPI mode and operates with clock frequencies up to 10MHz in internal-clock mode or beyond 4MHz in external-clock mode-enabling direct connection to microcontrollers like ARM Cortex-M or MSP430 without protocol translation logic.
What power-saving modes does MAX186BEPP offer?
MAX186BEPP offers two software-selectable power-down modes via PD1/PD0 bits in the control byte: fast power-down (30µA) and full power-down (≤2µA). Additionally, its SHDN pin provides hardware-controlled shutdown to ≤2µA. These modes allow aggressive power cycling-shutting down between conversions-making MAX186BEPP ideal for battery-powered systems where average current must remain below 10µA at reduced sampling rates.
MAX186BEPP 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:
- -
MAX186BEPP FAQ
1.How can I place an order for MAX186BEPP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX186BEPP 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 MAX186BEPP reliable?
The price and inventory of MAX186BEPP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX186BEPP is usually 5 days.
3.What payment methods are accepted for MAX186BEPP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX186BEPP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX186BEPP?
MAX186BEPP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX186BEPP 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 MAX186BEPP?
For technical support, including MAX186BEPP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX186BEPP requirements.
6.How does Aetrix verify that MAX186BEPP is sourced from the original manufacturer or authorized distributors?
All MAX186BEPP 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 MAX186BEPP meets industry standards.
7.What is the process for return or replacement of MAX186BEPP?
All MAX186BEPP units undergo pre-shipment inspection (PSI). If there is an issue with MAX186BEPP, 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 MAX186BEPP part is unused and in its original packaging.
Return procedure for MAX186BEPP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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