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Analog Devices Inc./Maxim Integrated MAX1202BEPP
- Part No.:
- MAX1202BEPP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX1202BEPP.pdf
- Description:
- IC ADC 12BIT SAR 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,199
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Product details
Overview
MAX1202BEPP from Maxim Integrated is a 12-bit, 8-channel serial analog-to-digital converter (ADC) designed for mixed +5V analog / +3V digital supply systems. It integrates an on-chip track/hold, 4.096V internal reference, SPI/MICROWIRE-compatible 4-wire interface, and supports unipolar/bipolar, single-ended/differential input configurations. It delivers 133ksps sampling rate with ±1 LSB INL and operates from single +5V or dual ±5V analog supplies - used in battery-powered medical instruments and high-accuracy process control.
For engineers reviewing the MAX1202BEPP datasheet, MAX1202BEPP pinout, MAX1202BEPP application, or MAX1202BEPP equivalent, key selection criteria include its 20-pin PDIP package, 1.5mA operating current, software-configurable power-down modes (<10μA), user-adjustable VL-supplied 3V/3.3V/5V logic levels, and compatibility with TMS320-family DSPs via SSTRB strobe.
Technical Context
The MAX1202BEPP employs successive-approximation architecture with integrated track/hold and internal 4.096V reference buffer. Its analog front-end supports 8 single-ended or 4 pseudo-differential inputs, with channel selection and mode configuration (unipolar/bipolar, internal/external clock) controlled via an 8-bit serial command word.
Conversion timing is synchronized to either internal 1.7MHz clock or external clock up to 2MHz; acquisition time is fixed at 1.5μs. The device uses a capacitive DAC and comparator-based SAR core, with input common-mode range spanning VSS to VDD and full-scale determined by REF voltage and gain factor (1.68×).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - provides 4096 discrete output codes for precise analog measurement |
| Sampling Rate | 133ksps - enables real-time capture of signals up to ~66kHz (Nyquist-limited) |
| INL (Integral Nonlinearity) | ±1 LSB - ensures monotonicity and <0.024% full-scale error across temperature |
| Supply Current (Operating) | 1.5 mA - low active power suitable for portable instrumentation |
| Power-Down Current | 2 μA - ultra-low shutdown current for energy-sensitive applications |
| Reference Voltage | 4.096 V (internal, trimmed) - matches standard 12-bit full-scale binary range (0–4095 × 1mV) |
| Digital I/O Supply (VL) | 2.7V to 5.25V - allows direct interfacing with 3V, 3.3V, or 5V logic without level shifters |
Pinout & Package
MAX1202BEPP is housed in a 20-pin plastic DIP (PDIP) package with 0.3-inch body width, RoHS-compliant and lead-free. Pin spacing is 0.1 inch, compatible with standard through-hole PCB assembly and socketing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Selectable as 8 single-ended or 4 differential inputs; input protection clamps to VDD/VSS |
| VSS (Pin 9) | Negative Analog Supply | Accepts 0V (single-supply) or –5V (dual-supply); sets bipolar input range center |
| SHDN (Pin 10) | Three-Level Shutdown Control | Low = full power-down (2μA); open = external compensation; VDD = internal compensation |
| REF (Pin 11) | Reference Output/Input | Delivers 4.096V (MAX1202) or accepts external reference; buffered, adjustable via REFADJ |
| REFADJ (Pin 12) | Reference Buffer Trim Input | Tie to VDD to disable internal reference; adjust ±1.5% for calibration or external reference scaling |
| GND (Pin 13) | Analog Ground / IN– | Common return for analog circuitry and single-ended conversion reference |
| VL (Pin 14) | Digital Output Supply | Sets DOUT/SSTRB high-level voltage (2.7–5.25V); enables mixed-voltage system interfacing |
| DOUT (Pin 15) | Serial Data Output | MSB-first, SCLK-falling-edge aligned; high-impedance when CS is high |
| SSTRB (Pin 16) | Serial Strobe Output | Pulses high before MSB in external clock mode; indicates conversion start/finish for TMS320 sync |
| DIN (Pin 17) | Serial Data Input | Accepts 8-bit control byte (channel, mode, clock/power-down settings) on SCLK rising edge |
| CS (Pin 18) | Chip Select (Active Low) | Enables serial interface; disables DOUT/SSTRB outputs when high |
| SCLK (Pin 19) | Serial Clock Input | Drives data transfer and (in external mode) conversion timing; supports up to 2MHz |
| VDD (Pin 20) | Positive Analog Supply | +5V ±5%; powers analog core, reference, and internal logic; absolute max = +6V |
Key Features
| Feature | Design Value |
|---|---|
| Internal 4.096V Reference | Eliminates external reference IC and trim components; ±30ppm/°C tempco (AC grade) reduces calibration drift |
| Software-Configurable Input Modes | Single-ended/differential and unipolar/bipolar selection via serial command enables flexible sensor interfacing without hardware changes |
| Three Power-Down States | Full (2μA), fast (30μA), and internal-clock modes allow dynamic current optimization between conversions |
| VL-Controlled Digital Outputs | Supports direct connection to 3V/3.3V microcontrollers or 5V logic without level-shifting circuitry |
| SPI/MICROWIRE/TMS320 Compatibility | 4-wire interface requires no glue logic; SSTRB strobe enables deterministic DSP synchronization |
Applications
| Battery-Powered Medical Instrumentation | Industrial Process Monitoring |
|---|---|
Use Scenario: Portable ECG or blood glucose meter acquiring analog sensor outputs under strict battery life constraints. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned biopotential or electrochemical signals with low noise and calibrated accuracy. Use Value: 2μA shutdown current extends battery life; internal reference eliminates calibration drift; 3V-compatible VL simplifies MCU interface. |
Use Scenario: PLC analog input module measuring temperature, pressure, and flow in factory automation systems. IC Role / Device Role / Timing Role: High-accuracy, multi-channel data acquisition front-end with configurable input ranges and robust noise immunity. Use Value: ±1 LSB INL ensures repeatability across channels; dual ±5V operation supports industrial transducer outputs; software-selectable bipolar mode handles thermocouple signals. |
| Automotive Diagnostic Equipment | Test & Measurement Bench Instruments |
Use Scenario: Handheld OBD-II scanner capturing analog sensor voltages (TPS, MAP, O2) in vehicle diagnostics. IC Role / Device Role / Timing Role: Mixed-supply ADC interfacing with 3.3V microcontroller while accepting 5V automotive sensor signals. Use Value: 4.096V reference enables 1mV/LSB resolution; CH0–CH7 multiplexing supports multiple sensor inputs; robust input protection handles load dump transients. |
Use Scenario: Benchtop multimeter or data logger requiring stable, calibrated DC voltage measurement over wide temperature range. IC Role / Device Role / Timing Role: Precision digitizer with traceable reference and low offset/gain drift for metrology-grade readings. Use Value: Channel-to-channel offset matching (±0.1 LSB) enables ratiometric measurements; REFADJ trim allows end-of-line calibration; 70dB SINAD supports clean signal capture. |
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; 8-pin SOIC | Lacks internal reference and bipolar mode; lower pin count but higher external BOM cost | Choose for space-constrained designs where external reference is already present and bipolar input not needed |
| MAX11131ATB+ | 12-bit, 1MSPS, internal 2.048V ref; SPI/QSPI; 10-pin µMAX; 1.8V–3.6V VL support | Higher speed and lower voltage operation; smaller package; different reference voltage affects full-scale scaling | Choose for modern low-voltage systems requiring faster sampling and smaller footprint, accepting 2.048V reference scaling |
Compared with ADS7822U and MAX11131ATB+, the MAX1202BEPP offers unique value in mixed 5V/3V systems needing internal 4.096V reference, bipolar input support, and TMS320-compatible SSTRB strobe - all in a through-hole PDIP package for prototyping and legacy industrial use.
Availability
MAX1202BEPP is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial process monitoring, and automotive diagnostic equipment requiring stable component supply across extended temperature ranges (–40°C to +85°C).
Supply support for MAX1202BEPP 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, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX1202BEPP belongs to Maxim's precision data acquisition product line, engineered for low-power, mixed-voltage systems requiring calibrated accuracy, flexible input configuration, and robust serial interfacing in harsh environments.
FAQ
What is the maximum sampling rate of the MAX1202BEPP?
The MAX1202BEPP achieves a maximum sampling rate of 133ksps when using a 2MHz external serial clock and 15 clock cycles per conversion. This rate is sustained across its full operating temperature range and is enabled by its integrated track/hold with 1.5μs acquisition time. The MAX1202BEPP does not support oversampling or decimation modes beyond this native rate.
Does the MAX1202BEPP require an external reference voltage?
No, the MAX1202BEPP includes an internal 4.096V reference with ±30ppm/°C temperature coefficient (for AC grade) and ±50ppm/°C for AE grade. External reference is optional and only required if higher precision or custom full-scale voltage is needed; in that case, the internal buffer must be disabled by pulling REFADJ to VDD.
How does the SHDN pin function on the MAX1202BEPP?
The SHDN pin on the MAX1202BEPP supports three states: pulled low enables full power-down (2μA supply current); left floating configures external compensation mode for the reference buffer; tied to VDD selects internal compensation mode. All states retain register contents and allow instant wake-up upon CS activation.
Can the MAX1202BEPP interface directly with a 3.3V microcontroller?
Yes - the MAX1202BEPP supports direct 3.3V microcontroller interfacing via its VL pin: applying 3.3V to VL sets DOUT and SSTRB high-level output to ~2.8V, compatible with 3.3V CMOS inputs. Its digital inputs (DIN, SCLK, CS, SHDN) accept 2.0V VIH and 0.8V VIL thresholds, ensuring reliable operation with 3.3V logic levels.
What are the supported input configurations for the MAX1202BEPP?
The MAX1202BEPP supports four input configurations selected via serial command: single-ended unipolar (0V to VREF), single-ended bipolar (–VREF/2 to +VREF/2), differential unipolar (0V to VREF across CHx/CHy), and differential bipolar (–VREF/2 to +VREF/2). Channel selection (CH0–CH7) and mode are fully software-defined without external jumpers or resistors.
MAX1202BEPP 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:
- External, Internal
- Voltage - Supply, Analog:
- ±5V, 5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX1202BEPP FAQ
1.How can I place an order for MAX1202BEPP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1202BEPP 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 MAX1202BEPP reliable?
The price and inventory of MAX1202BEPP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1202BEPP is usually 5 days.
3.What payment methods are accepted for MAX1202BEPP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1202BEPP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1202BEPP?
MAX1202BEPP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1202BEPP 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 MAX1202BEPP?
For technical support, including MAX1202BEPP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1202BEPP requirements.
6.How does Aetrix verify that MAX1202BEPP is sourced from the original manufacturer or authorized distributors?
All MAX1202BEPP 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 MAX1202BEPP meets industry standards.
7.What is the process for return or replacement of MAX1202BEPP?
All MAX1202BEPP units undergo pre-shipment inspection (PSI). If there is an issue with MAX1202BEPP, 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 MAX1202BEPP part is unused and in its original packaging.
Return procedure for MAX1202BEPP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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