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Analog Devices Inc./Maxim Integrated MAX1202BEAP+T
- Part No.:
- MAX1202BEAP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX1202BEAP+T.pdf
- Description:
- IC ADC 12BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,769
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Product details
Overview
MAX1202BEAP+T 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 ±1 LSB INL accuracy over temperature. It enables high-accuracy data acquisition in battery-powered instrumentation and medical devices.
For engineers reviewing the MAX1202BEAP+T datasheet, MAX1202BEAP+T pinout, MAX1202BEAP+T application, or MAX1202BEAP+T equivalent, key selection criteria include its 133ksps sampling rate, software-configurable power-down modes (<10μA), user-adjustable digital output logic levels (2.7V–5.25V via VL pin), and compatibility with TMS320-family DSPs via SSTRB strobe.
Technical Context
The MAX1202BEAP+T employs successive-approximation register (SAR) architecture with integrated track/hold, supporting both internal clock (1.7MHz) and external clock (up to 2MHz) operation. Its analog front-end accepts 8 single-ended or 4 pseudo-differential inputs, with input range determined by internal 4.096V reference (±0.5% initial accuracy) and configurable gain via REFADJ.
Digital interfacing uses a 4-wire SPI/MICROWIRE protocol with MSB-first, falling-edge data transfer; SSTRB provides synchronous strobe for TMS320 DSPs. Power management includes two software-selectable power-down modes-fast (30μA) and full (2μA)-with automatic wake-up on serial interface access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC - delivers 1 LSB = 1 part in 4096 quantization granularity |
| Sampling Rate | 133ksps - supports real-time acquisition of signals up to ~66kHz (Nyquist-limited) |
| INL (Max) | ±1 LSB - ensures monotonicity and <0.024% full-scale linearity error across operating temperature |
| Supply Current (Op) | 1.5mA typical - enables low-power embedded data logging without thermal derating |
| Reference | Internal 4.096V ±30ppm/°C - eliminates external reference component and simplifies layout |
| Digital I/O Voltage | VL pin supports 2.7V–5.25V logic - allows direct interfacing to 3V microcontrollers or 5V FPGAs |
| Serial Interface Speed | Up to 2MHz SCLK - enables full 12-bit conversion + control byte in ≤15 clock cycles (7.5μs min) |
Pinout & Package
MAX1202BEAP+T is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65mm pitch, RoHS-compliant and lead-free (+T suffix). The package measures 7.2mm × 5.3mm × 1.95mm and is rated for extended temperature range (−40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog Input Channels | Selectable as 8 single-ended or 4 pseudo-differential inputs; input protection clamps to VDD/VSS |
| VSS (Pin 9) | Negative Supply Rail | Accepts 0V (single-supply) or −5V (dual-supply) - sets bipolar input range center point |
| SHDN (Pin 10) | Three-Level Shutdown Control | Low = full shutdown (2μA); open = external compensation mode; VDD = internal compensation |
| REF (Pin 11) | Reference Buffer Output / REF Input | Delivers 4.096V (MAX1202) or accepts external reference; buffered to drive 4.7μF bypass cap |
| REFADJ (Pin 12) | Reference Gain Trim Input | Adjusts internal reference gain (±1.5%) - tied to VDD to disable buffer in external-ref mode |
| GND (Pin 13) | Analog Ground / IN− for SE Mode | Common return for analog circuitry; serves as IN− reference in single-ended conversions |
| VL (Pin 14) | Digital Output Supply | Sets DOUT/SSTRB high-level voltage (2.7V–5.25V) - enables level-shifting without external buffers |
| DOUT (Pin 15) | Serial Data Output | MSB-first, SCLK-falling-edge synchronized; high-impedance when CS = high |
| SSTRB (Pin 16) | Serial Strobe Output | Active-high pulse synchronized to conversion start/end - directly interfaces TMS320 DSP timing |
| DIN (Pin 17) | Serial Data Input | Accepts 8-bit control byte (channel, mode, power-down) - rising-edge sampled |
| CS (Pin 18) | Chip Select | Active-low enable for serial interface; disables DOUT/SSTRB when high |
| SCLK (Pin 19) | Serial Clock Input | Drives data transfer and (in external mode) conversion timing - 40–60% duty cycle required |
| VDD (Pin 20) | Positive Analog Supply | +5V ±5% - powers analog core, reference, and track/hold; tolerant to 6V absolute max |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Track/Hold | 1.5μs acquisition time - supports accurate sampling of signals with source impedances ≤1kΩ |
| Software-Configurable Inputs | Single-ended/differential and unipolar/bipolar modes selected via 8-bit control byte - no hardware changes needed |
| Flexible Digital Interface | SPI/MICROWIRE/TMS320-compatible with 4-wire protocol - no glue logic required for common controllers |
| Low-Power Operation | 1.5mA active current and 2μA full shutdown - extends battery life in portable instruments |
| User-Adjustable Logic Levels | VL pin sets DOUT/SSTRB swing (2.7V–5.25V) - eliminates level translators in mixed-voltage systems |
| On-Chip Reference Buffer | 1.68× gain amplifier with REFADJ trim - simplifies gain calibration and reduces external component count |
Applications
| Portable Medical Monitoring | Battery-Powered Data Loggers |
|---|---|
Use Scenario: Continuous acquisition of ECG, temperature, and blood oxygen sensor outputs in handheld diagnostic devices. IC Role / Device Role / Timing Role: Primary ADC capturing multi-channel analog biosignals at 100–200Hz with 12-bit resolution and low noise floor. Use Value: Internal 4.096V reference and 2μA shutdown current minimize BOM cost and extend battery runtime beyond 72 hours. |
Use Scenario: Environmental parameter logging (temperature, humidity, pressure) in remote field deployments. IC Role / Device Role / Timing Role: Low-power ADC performing periodic burst sampling with automatic power-down between reads. Use Value: Software-selectable power-down modes reduce average supply current to <5μA, enabling 5-year coin-cell operation. |
| Industrial Process Sensors | Automated Test Equipment (ATE) |
Use Scenario: High-accuracy measurement of 4–20mA loop sensors and thermocouple outputs in PLC I/O modules. IC Role / Device Role / Timing Role: Precision ADC with ±1 LSB INL and channel-to-channel offset matching <0.1 LSB for multi-sensor correlation. Use Value: Bipolar input support and internal reference buffer simplify signal conditioning for millivolt-level transducer outputs. |
Use Scenario: Digitizing stimulus-response waveforms during functional testing of analog circuits and power supplies. IC Role / Device Role / Timing Role: Fast 133ksps ADC with SSTRB strobe synchronized to test controller clock for deterministic capture timing. Use Value: 4.5MHz small-signal bandwidth and 80dB SFDR enable clean digitization of transient events and harmonic content. |
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 | Lacks internal reference and VL-level flexibility; higher sampling rate but no SSTRB for DSP sync | Choose when higher speed is critical and external reference is already present in system |
| MAX11131ETE+ | 12-bit, 500ksps, internal 4.096V ref, 10-pin μMAX, no SHDN pin, VL not supported | Smaller package and higher speed, but lacks three-level shutdown and programmable logic levels | Choose for space-constrained designs where VL flexibility and deep shutdown are non-critical |
Compared with ADS7822U and MAX11131ETE+, the MAX1202BEAP+T uniquely combines internal reference, VL-adjustable outputs, SSTRB strobe, and three-level shutdown-making it optimal for portable, mixed-voltage, DSP-coupled systems requiring design simplicity and ultra-low quiescent current.
Availability
MAX1202BEAP+T is available at Aetrix Electronics and suitable for portable medical monitoring, battery-powered data loggers, and industrial process sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1202BEAP+T 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 MAX1202BEAP+T belongs to Maxim's precision data-acquisition ADC family, engineered for low-power, mixed-supply environments where integration of reference, track/hold, and flexible digital interfacing reduces system complexity and board area.
FAQ
What is the guaranteed integral nonlinearity (INL) specification for MAX1202BEAP+T?
The MAX1202BEAP+T is specified with ±1 LSB maximum INL over the extended temperature range (−40°C to +85°C), as confirmed in the official Maxim datasheet revision 3. This applies to the 'B' grade version and ensures monotonic behavior and high DC accuracy for precision measurement applications using the MAX1202BEAP+T.
Does MAX1202BEAP+T require an external reference capacitor?
Yes, the MAX1202BEAP+T requires a 4.7μF capacitor between REF and GND when operating in internal reference mode, as specified in the datasheet's Electrical Characteristics table and Typical Operating Circuit. This capacitor stabilizes the internal 4.096V reference and is mandatory for achieving specified INL and gain error performance of the MAX1202BEAP+T.
Can MAX1202BEAP+T interface directly with a 3.3V microcontroller without level shifters?
Yes, the MAX1202BEAP+T supports direct 3.3V MCU interfacing via its VL pin: applying 3.3V to VL configures DOUT and SSTRB to output logic-high levels near 3.3V (VOH ≥ VL − 0.5V), while digital inputs (DIN, SCLK, CS, SHDN) accept 3.3V-tolerant thresholds - eliminating external level shifters in 3.3V systems using the MAX1202BEAP+T.
What is the minimum acquisition time required before conversion starts on MAX1202BEAP+T?
The MAX1202BEAP+T specifies a minimum acquisition time (tACQ) of 1.5μs, defined as the time required for the internal track/hold to settle after the last bit of the control byte is clocked in. This value is guaranteed across temperature and supply conditions and must be respected to ensure full 12-bit accuracy in every conversion performed by the MAX1202BEAP+T.
How does the SHDN pin function in MAX1202BEAP+T, and what are its states?
The SHDN pin on the MAX1202BEAP+T supports three distinct states: pulled low → full shutdown (2μA supply current); left floating → external compensation mode (enables 4.7μF REF bypass); pulled high → internal compensation mode. This three-level control allows dynamic optimization of reference stability and power consumption in systems using the MAX1202BEAP+T.
MAX1202BEAP+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -
MAX1202BEAP+T FAQ
1.How can I place an order for MAX1202BEAP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1202BEAP+T 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 MAX1202BEAP+T reliable?
The price and inventory of MAX1202BEAP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1202BEAP+T is usually 5 days.
3.What payment methods are accepted for MAX1202BEAP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1202BEAP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1202BEAP+T?
MAX1202BEAP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1202BEAP+T 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 MAX1202BEAP+T?
For technical support, including MAX1202BEAP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1202BEAP+T requirements.
6.How does Aetrix verify that MAX1202BEAP+T is sourced from the original manufacturer or authorized distributors?
All MAX1202BEAP+T 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 MAX1202BEAP+T meets industry standards.
7.What is the process for return or replacement of MAX1202BEAP+T?
All MAX1202BEAP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1202BEAP+T, 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 MAX1202BEAP+T part is unused and in its original packaging.
Return procedure for MAX1202BEAP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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