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Analog Devices Inc./Maxim Integrated MAX1202AEAP
- Part No.:
- MAX1202AEAP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX1202AEAP.pdf
- Description:
- IC ADC 12BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,249
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Product details
Overview
MAX1202AEAP 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, SPI/MICROWIRE-compatible 4-wire serial interface, internal 4.096V reference, and supports unipolar/bipolar input modes with ±0.5 LSB INL (A-grade). It delivers 133ksps sampling rate and operates from single +5V or dual ±5V analog supplies - ideal for battery-powered medical instruments requiring low-power, high-accuracy data acquisition.
For engineers reviewing the MAX1202AEAP datasheet, MAX1202AEAP pinout, MAX1202AEAP application, or MAX1202AEAP 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 details specific to the MAX1202AEAP variant in 20-pin SSOP package with extended temperature range (–40°C to +85°C) and ±0.5 LSB INL performance.
Technical Context
The MAX1202AEAP uses successive-approximation architecture with integrated track/hold circuitry, enabling 1.5μs acquisition time and 133ksps conversion rate using either internal clock (1.7MHz) or external serial clock up to 2MHz. Its analog front-end supports both 8-channel single-ended and 4-channel pseudo-differential inputs, with input voltage range determined by internal 4.096V reference (±0.5 LSB INL, ±3 LSB gain error).
Digital interface compliance includes SPI Mode 0 (CPOL=0, CPHA=0) and MICROWIRE protocols; SSTRB strobe output enables direct TMS320-family DSP interfacing. Power management features include two software-selectable power-down modes (fast: 30μA; full: 2μA), automatic wake-up via serial access, and VL pin-controlled output logic levels (2.7V–5.25V) for seamless 3V/5V system integration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal digitization in precision measurement. |
| INL (Integral Nonlinearity) | ±0.5 LSB - ensures <0.012% full-scale error across temperature, critical for calibration-sensitive process control. |
| Sampling Rate | 133ksps - supports real-time capture of signals up to ~66kHz (Nyquist-limited) without undersampling complexity. |
| Analog Supply | +5V single or ±5V dual - eliminates need for isolated analog rails in industrial sensor interfaces. |
| Digital I/O Voltage (VL) | 2.7V to 5.25V - allows direct connection to 3.3V microcontrollers or 5V FPGAs without level-shifting components. |
| Power Consumption | 1.5mA operating / 2μA full power-down - enables >100-hour battery life in portable instrumentation at reduced sampling rates. |
| Reference | Internal 4.096V (±30ppm/°C max) - provides stable, factory-trimmed reference eliminating external reference IC and trim potentiometers. |
Pinout & Package
MAX1202AEAP is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, RoHS-compliant and rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog input channels | Support 8 single-ended or 4 pseudo-differential inputs; CHx selected via 3-bit control word; IN- must remain stable within ±0.1 LSB during conversion. |
| VSS (Pin 9) | Negative analog supply | Accepts 0V (single-supply) or –5V (dual-supply); defines bipolar input range (±VREF/2) and sets common-mode baseline. |
| SHDN (Pin 10) | Three-level shutdown control | Pull low → 10μA shutdown; leave open → external compensation mode; tie to VDD → internal compensation mode for REF buffer. |
| REF (Pin 11) | Reference buffer output / ADC reference input | Delivers 4.096V ±0.02V (typ) for MAX1202; bypassed with 4.7μF capacitor; disables internal buffer when REFADJ = VDD (for MAX1203 use only). |
| REFADJ (Pin 12) | Reference buffer gain adjustment | Enables ±1.5% fine-tuning of REF output; tie to VDD to disable internal reference buffer in MAX1202AEAP applications. |
| GND (Pin 13) | Analog ground / IN- for single-ended mode | Primary return path; serves as IN- input when SGL/DIF = 1; requires low-impedance connection to minimize offset drift. |
| VL (Pin 14) | Digital output supply | Sets DOUT/SSTRB logic high level (2.7V–5.25V); decouples digital I/O voltage from analog VDD, enabling mixed-voltage system interfacing. |
| DOUT (Pin 15) | Serial data output | MSB-first, SCLK-falling-edge synchronized; high-impedance when CS = high; sinks up to 6mA at 0.3V VOL (VL = 3.6V). |
| SSTRB (Pin 16) | Serial strobe output | Signals conversion start/end: pulses high for one SCLK period before MSB in external clock mode; active-low in internal clock mode. |
| DIN (Pin 17) | Serial data input | Accepts 8-bit control byte (START + SEL2–SEL0 + UNI/BIP + SGL/DIF + PD1/PD0); sampled on SCLK rising edge. |
| CS (Pin 18) | Active-low chip select | Enables serial interface; DOUT/SSTRB enter high-Z state when CS = high; required to be low for valid DIN sampling. |
| SCLK (Pin 19) | Serial clock input | Drives data transfer and (in external mode) conversion timing; supports 100kHz–2MHz; 40–60% duty cycle required in external clock mode. |
| VDD (Pin 20) | Positive analog supply | +5V ±5%; powers analog core, track/hold, and reference buffer; absolute max = +6V; must be decoupled with 0.1μF + 4.7μF near pin. |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel multiplexer with track/hold | Reduces external signal conditioning components; enables channel scanning at 133ksps with <1.5μs acquisition time and 4.5MHz small-signal bandwidth. |
| Internal 4.096V reference (A-grade) | Eliminates external reference IC and trimming; ±0.5 LSB INL and ±30ppm/°C tempco meet medical-grade accuracy requirements without calibration. |
| Software-configurable unipolar/bipolar mode | Single control-bit selection (UNI/BIP) switches full-scale range between 0–4.096V (unipolar) or –2.048V to +2.048V (bipolar), simplifying firmware for multi-range sensors. |
| 3V/5V flexible digital I/O (VL pin) | Allows direct interface to 3.3V microcontrollers (e.g., ARM Cortex-M) or 5V logic without level shifters - reduces BOM count and layout complexity. |
| Two power-down modes (2μA / 30μA) | Enables dynamic power scaling: full shutdown between conversions cuts average current below 10μA at <1ksps, extending battery life in portable diagnostics. |
Applications
| Portable ECG Monitor | Industrial Temperature Controller |
|---|---|
Use Scenario: Digitizing low-amplitude, high-impedance biopotential signals (0.5–5mV) from electrode pairs in handheld cardiac monitoring devices. IC Role / Device Role / Timing Role: Primary 12-bit ADC with integrated track/hold and internal reference; samples 8 leads sequentially at 1ksps with programmable gain and bipolar input mode. Use Value: ±0.5 LSB INL and 70dB SINAD ensure diagnostic-grade waveform fidelity; 2μA shutdown extends AA-battery life to >120 hours. |
Use Scenario: Reading thermocouple and RTD outputs in PLC-based HVAC control panels with mixed 5V analog sensor inputs and 3.3V microcontroller logic. IC Role / Device Role / Timing Role: System ADC handling 4 differential thermocouple channels and 4 single-ended RTD inputs; configured for bipolar mode with cold-junction compensation. Use Value: Internal 4.096V reference and ±0.5 LSB INL eliminate external calibration; VL pin enables direct SPI connection to 3.3V ARM processor without level shifters. |
| Battery-Powered Data Logger | Automated Test Equipment (ATE) Front-End |
Use Scenario: Capturing environmental sensor data (vibration, humidity, pressure) in field-deployed wireless nodes powered by Li-ion cells. IC Role / Device Role / Timing Role: Low-power ADC managing 8 analog inputs with adaptive sampling; enters full power-down between bursts to minimize quiescent current. Use Value: 2μA shutdown current and software-triggered wake-up reduce average power to <50μW; SSOP package fits compact PCB layouts. |
Use Scenario: High-speed signal acquisition stage in benchtop ATE systems requiring precise DC accuracy and fast channel switching. IC Role / Device Role / Timing Role: Precision digitizer with 133ksps throughput and 80dB SFDR; used with external op-amp front-end for 16-bit effective resolution via averaging. Use Value: 80dB spurious-free dynamic range and –85dB channel crosstalk prevent measurement contamination across multi-channel test fixtures. |
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, single-supply 2.7–5.25V, no internal reference, SPI-only interface, 8-pin SOIC | Requires external reference and level-shifting for 5V analog systems; lacks bipolar mode and multiplexer | Select when board space is constrained and only single-channel, high-speed acquisition is needed with existing 3V supply infrastructure. |
| MAX11131EUB+ | 12-bit, 500ksps, internal reference (4.096V), SPI/MICROWIRE, 10-pin μMAX, –40°C to +85°C, ±0.5 LSB INL | 4-channel (not 8), no differential mode, smaller package, higher sampling rate but higher 2.5mA operating current | Choose for space-constrained designs needing higher speed and same accuracy grade, where channel count and differential capability are secondary. |
Compared with MAX1202AEAP, ADS7822U offers higher speed but requires external reference and lacks multiplexing, while MAX11131EUB+ saves board area and increases throughput but sacrifices channel count and differential input flexibility - making MAX1202AEAP optimal for multi-sensor, mixed-supply, low-power embedded systems demanding proven A-grade linearity.
Availability
MAX1202AEAP is available at Aetrix Electronics and suitable for portable medical instruments, industrial temperature controllers, battery-powered data loggers, and automated test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1202AEAP 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 MAX1202AEAP belongs to Maxim's precision data-acquisition ADC family, engineered for mixed-voltage systems where 5V analog signal integrity and 3V digital compatibility must coexist without external level-shifting or reference components.
FAQ
What is the guaranteed INL specification for MAX1202AEAP?
The MAX1202AEAP is specified with ±0.5 LSB integral nonlinearity over its full operating temperature range (–40°C to +85°C), confirmed in the official datasheet under the "Electrical Characteristics" table for MAX1202A-grade parts. This performance is enabled by factory trimming and applies with internal reference enabled and proper 4.7μF REF bypassing. The MAX1202AEAP maintains this INL spec without user calibration.
Does MAX1202AEAP support differential input mode?
Yes, the MAX1202AEAP supports pseudo-differential input mode via its 4-channel configuration (CH0/CH1, CH2/CH3, CH4/CH5, CH6/CH7), selectable using the SGL/DIF bit in the control byte. In this mode, the device samples the voltage difference between paired channels, with IN- required to remain stable within ±0.1 LSB relative to GND. The MAX1202AEAP does not perform true fully-differential sampling but delivers matched channel performance critical for sensor bridge interfaces.
How is the digital output voltage level set on MAX1202AEAP?
The MAX1202AEAP uses the VL pin (Pin 14) to set digital output logic levels: applying 2.7V–5.25V to VL directly defines VOH (e.g., VL – 0.5V at 1mA source) and VOL (e.g., 0.3V at 6mA sink). This allows DOUT and SSTRB to interface natively with 3.3V microcontrollers or 5V FPGAs. Unlike fixed-VDD-referenced outputs, VL decouples digital I/O from analog supply noise - a key design advantage confirmed in the MAX1202AEAP timing and electrical characteristics tables.
Can MAX1202AEAP operate from a single +5V supply?
Yes, the MAX1202AEAP operates from a single +5V analog supply (VDD = +5V ±5%, VSS = GND) in unipolar mode, delivering 0V to 4.096V full-scale input range. Dual ±5V operation (VSS = –5V) enables bipolar input ranges (±2.048V). Both configurations are production-validated per the MAX1202AEAP datasheet Absolute Maximum Ratings and Electrical Characteristics sections, with identical ±0.5 LSB INL performance in either mode when using the internal reference.
What power-down current does MAX1202AEAP achieve in full shutdown mode?
In full power-down mode (PD1/PD0 = 00 in control byte), the MAX1202AEAP draws ≤2μA total supply current at +25°C and ≤10μA across its full –40°C to +85°C operating range, as specified in the "Power Requirements" section of the datasheet. This ultra-low current is achieved with SHDN pulled low, VL = 3.3V, all digital inputs tied to valid logic levels, and REFADJ = GND - enabling multi-year battery operation in intermittent-sampling applications.
MAX1202AEAP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- 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-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1202AEAP FAQ
1.How can I place an order for MAX1202AEAP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1202AEAP 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 MAX1202AEAP reliable?
The price and inventory of MAX1202AEAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1202AEAP is usually 5 days.
3.What payment methods are accepted for MAX1202AEAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1202AEAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1202AEAP?
MAX1202AEAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1202AEAP 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 MAX1202AEAP?
For technical support, including MAX1202AEAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1202AEAP requirements.
6.How does Aetrix verify that MAX1202AEAP is sourced from the original manufacturer or authorized distributors?
All MAX1202AEAP 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 MAX1202AEAP meets industry standards.
7.What is the process for return or replacement of MAX1202AEAP?
All MAX1202AEAP units undergo pre-shipment inspection (PSI). If there is an issue with MAX1202AEAP, 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 MAX1202AEAP part is unused and in its original packaging.
Return procedure for MAX1202AEAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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