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Analog Devices Inc./Maxim Integrated MAX1202AEPP
- Part No.:
- MAX1202AEPP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX1202AEPP.pdf
- Description:
- IC ADC 12BIT SAR 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,608
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Product details
Overview
MAX1202AEPP 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 input modes with 133ksps sampling rate. It is used in high-accuracy process control and battery-powered instrumentation requiring low-power operation and flexible logic-level interfacing.
For engineers reviewing the MAX1202AEPP datasheet, MAX1202AEPP pinout, MAX1202AEPP application, or MAX1202AEPP equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support details specific to the MAX1202AEPP variant.
Technical Context
The MAX1202AEPP uses successive-approximation architecture with integrated track/hold and internal 4.096V reference buffer. It operates from single +5V or dual ±5V analog supplies while supporting 2.7V–5.25V digital I/O via the VL pin - enabling direct interfacing with 3V microcontrollers without level shifters.
Its 4-wire serial interface runs at up to 2MHz, supports both internal and external clock modes, and provides SSTRB strobe output synchronized to conversion start/finish. Power management includes two software-selectable power-down modes (fast and full), achieving ≤2μA shutdown current at extended temperature range (−40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 1 part in 4096 quantization precision for high-fidelity signal capture. |
| Sampling Rate | 133ksps - enables real-time acquisition of signals up to ~66kHz (Nyquist-limited) in continuous mode. |
| INL (Max) | ±0.5 LSB (A-grade) - ensures monotonicity and <0.012% full-scale linearity error across operating temperature. |
| Supply Current (Op) | 1.5mA typical - allows battery-powered operation with >600hr runtime on a 1000mAh cell at 1ksps. |
| Reference | Internal 4.096V ±30ppm/°C - eliminates external reference component count and provides stable scaling for ratiometric measurements. |
| Digital I/O Voltage | VL = 2.7V–5.25V - permits native interfacing with 3V, 3.3V, or 5V logic families without translation circuitry. |
| Operating Temp | −40°C to +85°C - qualified for industrial and medical environments where thermal stability is critical. |
Pinout & Package
MAX1202AEPP is housed in a 20-pin plastic DIP (PDIP) package with 0.3-inch body width, RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Support 8 single-ended or 4 pseudo-differential inputs; IN- must remain stable within ±0.1 LSB during conversion. |
| VSS (Pin 9) | Negative Analog Supply | Accepts 0V (single-supply) or −5V (dual-supply); sets bipolar input range center point. |
| SHDN (Pin 10) | Three-Level Shutdown Control | Pulled low → full power-down (≤2μA); open → external compensation mode; tied to VDD → internal compensation. |
| REF (Pin 11) | Reference Output/Input | Delivers 4.096V (MAX1202 only); requires 4.7μF bypass cap in external-compensation mode. |
| REFADJ (Pin 12) | Reference Buffer Adjustment | Enables ±1.5% fine-tuning of REF voltage; tie to VDD to disable internal reference buffer. |
| GND (Pin 13) | Analog Ground / IN− | Serves as return path for single-ended conversions and system ground reference. |
| VL (Pin 14) | Digital Output Supply | Sets DOUT/SSTRB logic-high level (2.7V–5.25V); decouples digital I/O from analog supply noise. |
| DOUT (Pin 15) | Serial Data Output | MSB-first, SCLK-falling-edge aligned; high-impedance when CS = high. |
| SSTRB (Pin 16) | Serial Strobe Output | Pulses high before MSB in external-clock mode; indicates conversion start/finish in internal-clock mode. |
| DIN (Pin 17) | Serial Data Input | Accepts 8-bit control byte (START, channel select, UNI/BIP, SGL/DIF, PD1/PD0) on SCLK rising edge. |
| CS (Pin 18) | Active-Low Chip Select | Enables serial interface and powers up device; high → places DOUT/SSTRB in high-Z state. |
| SCLK (Pin 19) | Serial Clock Input | Drives data transfer and (in external mode) conversion timing; 50% duty cycle required, 0.1–2MHz range. |
| VDD (Pin 20) | Positive Analog Supply | +5V ±5%; powers analog core, reference, and track/hold; absolute max = +6V. |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel multiplexer with track/hold | Reduces external signal conditioning needs; 1.5μs acquisition time enables accurate sampling of sources ≤1kΩ impedance. |
| Internal 4.096V reference (A-grade) | Eliminates external reference IC and trimming resistors; ±30ppm/°C drift supports stable calibration over industrial temperature range. |
| Software-configurable unipolar/bipolar mode | Single control-bit selection enables seamless adaptation to sensor outputs spanning 0–VREF or ±VREF/2 without hardware changes. |
| Two power-down modes | Full power-down (≤2μA) extends battery life in intermittent-sampling applications; fast power-down (≤70μA) reduces wake-up latency. |
| 3V/5V digital I/O compatibility | VL pin decouples logic supply from analog rails, preventing digital switching noise from coupling into sensitive analog measurements. |
Applications
| Industrial Process Monitoring | Battery-Powered Diagnostic Equipment |
|---|---|
Use Scenario: Continuous monitoring of 4–20mA current-loop sensors and thermocouple outputs in PLC I/O modules. IC Role / Device Role / Timing Role: ADC front-end with integrated track/hold and internal reference, performing synchronized 133ksps sampling across 8 channels. Use Value: Eliminates external reference and level-shifting components, reducing BOM cost by $0.32/unit and PCB area by 12mm². |
Use Scenario: Portable ECG and blood glucose meters requiring ultra-low standby current and precise analog front-end performance. IC Role / Device Role / Timing Role: Primary signal digitizer with full power-down mode activated between measurements to minimize average supply current. Use Value: Achieves ≤2μA shutdown current and ±0.5 LSB INL over −40°C to +85°C, meeting IEC 60601-1 accuracy requirements. |
| Medical Instrumentation | Mixed-Voltage Data Acquisition Systems |
Use Scenario: High-resolution patient vital sign acquisition in portable ultrasound and pulse oximetry devices. IC Role / Device Role / Timing Role: 12-bit ADC with 4.5MHz small-signal bandwidth capturing transient physiological waveforms without aliasing. Use Value: Internal track/hold and 133ksps rate enable accurate reconstruction of QRS complexes and SpO₂ plethysmographic waveforms. |
Use Scenario: Industrial IoT gateways interfacing legacy 5V analog sensors with modern 3.3V ARM-based SoCs. IC Role / Device Role / Timing Role: Voltage-level-agnostic ADC bridging analog domain (5V) and digital domain (3.3V) with no external level translators. Use Value: VL pin programmability avoids signal integrity degradation from discrete level-shifters, preserving SNR >70dB. |
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 | 8-channel, 12-bit, SPI interface; no internal reference; requires external 2.5V ref; 50ksps max sampling rate. | Lacks internal reference and track/hold; lower speed limits use in dynamic signal capture. | Select when external reference already exists and sampling rate ≤50ksps suffices. |
| MAX11131ATB+ | 8-channel, 12-bit, SPI interface; internal 2.048V ref; 500ksps sampling rate; 10-pin μMAX package. | Higher speed but smaller package; different reference voltage affects full-scale scaling and calibration. | Select for space-constrained designs needing >133ksps, accepting 2.048V reference and re-calibration effort. |
Compared with ADS7822U and MAX11131ATB+, the MAX1202AEPP uniquely combines internal 4.096V reference, 133ksps rate, and PDIP packaging - making it optimal for industrial retrofits and medical instruments where board layout stability, calibration simplicity, and thermal robustness are prioritized over miniaturization or extreme speed.
Availability
MAX1202AEPP is available at Aetrix Electronics and suitable for industrial process monitoring, battery-powered diagnostic equipment, medical instrumentation, and mixed-voltage data acquisition systems requiring stable component supply and long-term lifecycle continuity.
Supply support for MAX1202AEPP 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 MAX1202AEPP belongs to Maxim's precision data-acquisition ADC family, engineered for systems requiring low-power, mixed-supply operation, internal reference stability, and direct 3V logic interfacing without external support components.
FAQ
What is the operating temperature range for the MAX1202AEPP?
The MAX1202AEPP is specified for −40°C to +85°C (extended temperature range), matching the 'E' grade designation in its part number suffix. This qualifies it for deployment in harsh industrial and medical environments where ambient temperatures exceed commercial-grade limits. All key specifications-including INL (±0.5 LSB), gain error (±3 LSB), and supply current-are guaranteed across this full range.
Does the MAX1202AEPP require an external reference voltage?
No, the MAX1202AEPP includes an internal 4.096V reference with ±30ppm/°C temperature coefficient and ±0.5 LSB INL over temperature-eliminating the need for external reference components. The REF pin outputs this voltage, and REFADJ allows ±1.5% adjustment. External reference mode is not supported on the MAX1202AEPP; that functionality applies only to the MAX1203 variant.
How does the VL pin affect digital interface behavior in the MAX1202AEPP?
The VL pin on the MAX1202AEPP sets the high-level output voltage for DOUT and SSTRB, supporting 2.7V–5.25V logic levels. When VL = 3.3V, outputs swing cleanly between 0V and 3.3V-enabling direct connection to 3.3V microcontrollers without level shifters. This decouples digital I/O noise from the analog supply, preserving ADC SNR and reducing layout complexity.
What power-down modes does the MAX1202AEPP support, and how are they selected?
The MAX1202AEPP supports two software-selectable power-down modes via bits PD1/PD0 in the 8-bit control byte: full power-down (PD1=0, PD0=0) draws ≤2μA, and fast power-down (PD1=0, PD0=1) draws ≤70μA. Both modes retain register state and allow immediate wake-up upon next CS assertion. SHDN pin can also force full power-down externally.
Is the MAX1202AEPP pin-compatible with other members of the MAX1202/MAX1203 family?
Yes, the MAX1202AEPP shares identical 20-pin PDIP pinout and electrical interface with all MAX1202 variants (e.g., MAX1202ACPP+, MAX1202BCAP+) and MAX1203 variants. However, functional differences exist: MAX1202AEPP has internal reference and A-grade INL (±0.5 LSB), while MAX1203 parts require external reference and differ in reference-buffer configuration.
MAX1202AEPP 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:
- -
MAX1202AEPP FAQ
1.How can I place an order for MAX1202AEPP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1202AEPP 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 MAX1202AEPP reliable?
The price and inventory of MAX1202AEPP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1202AEPP is usually 5 days.
3.What payment methods are accepted for MAX1202AEPP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1202AEPP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1202AEPP?
MAX1202AEPP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1202AEPP 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 MAX1202AEPP?
For technical support, including MAX1202AEPP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1202AEPP requirements.
6.How does Aetrix verify that MAX1202AEPP is sourced from the original manufacturer or authorized distributors?
All MAX1202AEPP 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 MAX1202AEPP meets industry standards.
7.What is the process for return or replacement of MAX1202AEPP?
All MAX1202AEPP units undergo pre-shipment inspection (PSI). If there is an issue with MAX1202AEPP, 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 MAX1202AEPP part is unused and in its original packaging.
Return procedure for MAX1202AEPP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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