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Analog Devices Inc./Maxim Integrated MAX1202BEAP+
- Part No.:
- MAX1202BEAP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX1202BEAP+.pdf
- Description:
- IC ADC 12BIT SAR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,445
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Product details
Overview
MAX1202BEAP+ 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 0°C to +70°C. It delivers 133ksps sampling rate and operates down to 2μA in full power-down mode - ideal for battery-powered instrumentation requiring precision and low quiescent current.
For engineers reviewing the MAX1202BEAP+ datasheet, MAX1202BEAP+ pinout, MAX1202BEAP+ application, or MAX1202BEAP+ equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented differences, and application-specific implementation guidance - all grounded in the official MAX1202/MAX1203 datasheet Rev 3 (2012).
Technical Context
The MAX1202BEAP+ uses successive-approximation register (SAR) architecture with integrated track/hold and programmable input configuration (8 single-ended or 4 pseudo-differential channels). Its conversion timing is synchronized either to an internal 1.7MHz clock or externally supplied SCLK up to 2MHz, with 15 clock cycles per 12-bit result.
It features dual-supply operation (single +5V or dual ±5V), user-adjustable digital output levels via VL pin (2.7V–5.25V), and two software-selectable power-down modes - enabling supply current reduction below 10μA between conversions. The internal reference buffer (enabled by SHDN state) supports external compensation with 4.7μF capacitor at REF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 1 LSB = 1 mV step size with 4.096V reference, enabling sub-millivolt measurement resolution. |
| INL (Integral Nonlinearity) | ±1 LSB max - ensures monotonicity and <0.024% full-scale error across temperature, critical for closed-loop control accuracy. |
| Sampling Rate | 133ksps - supports 10kHz sine-wave inputs with 70dB SINAD, suitable for medium-bandwidth sensor acquisition. |
| Power Consumption | 1.5mA operating / 2μA full power-down - enables energy-efficient duty-cycled operation in portable medical or industrial data loggers. |
| Analog Input Range | Unipolar: 0V to VREF (4.096V); Bipolar: ±VREF/2 - configurable per channel via control byte, simplifying multi-range system design. |
| Digital Interface | SPI/MICROWIRE/TMS320-compatible 4-wire serial - direct connection to 3V microcontrollers without level shifters; DOUT/SSTRB logic levels set by VL pin. |
| Reference | Internal 4.096V ±50ppm/°C (MAX1202BEAP+) - eliminates external reference component, reduces BOM count, and maintains 12-bit accuracy over commercial temperature range. |
Pinout & Package
MAX1202BEAP+ is housed in a 20-pin SSOP package (body width 0.209", JEDEC MO-153), RoHS-compliant and lead(Pb)-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 1–8) | Analog input channels | Selectable as 8 single-ended or 4 pseudo-differential pairs; IN- must remain stable within ±0.1 LSB during conversion. |
| VSS (Pin 9) | Negative supply rail | Accepts 0V (ground) or –5V ±5%; defines bipolar input common-mode range and sets VREF/2 offset. |
| SHDN (Pin 10) | Three-level shutdown control | Pulled low → 10μA shutdown; open → external compensation mode; tied to VDD → internal compensation mode. |
| REF (Pin 11) | Reference buffer output / ADC reference input | Delivers 4.096V ±50ppm/°C (MAX1202); requires 4.7μF bypass cap in external-compensation mode. |
| REFADJ (Pin 12) | Reference buffer gain adjustment | Tied to GND for nominal 4.096V; tied to VDD disables internal reference buffer (for MAX1203 compatibility). |
| GND (Pin 13) | Analog ground / IN- for single-ended mode | Common return for analog signals; serves as negative input when SGL/DIF = 1 in control byte. |
| VL (Pin 14) | Digital output supply | Sets DOUT/SSTRB high-level voltage (2.7V–5.25V); enables direct interfacing with 3V, 3.3V, or 5V logic families. |
| DOUT (Pin 15) | Serial data output | MSB-first, clocked on SCLK falling edge; high-impedance when CS = high - supports bus sharing. |
| SSTRB (Pin 16) | Serial strobe output | Pulses high one SCLK period before MSB in external-clock mode; indicates conversion start/end in internal-clock mode. |
| DIN (Pin 17) | Serial data input | Accepts 8-bit control byte (START, SEL2–SEL0, UNI/BIP, SGL/DIF, PD1/PD0) on SCLK rising edge. |
| CS (Pin 18) | Active-low chip select | Enables serial interface and powers up device; DOUT/SSTRB enter high-Z when CS = high. |
| SCLK (Pin 19) | Serial clock input | Drives data transfer and (in external mode) controls conversion timing; 50% duty cycle required, 0.1–2.0MHz range. |
| VDD (Pin 20) | Positive analog supply | +5V ±5%; powers analog core, reference buffer, and multiplexer; absolute max = +6V. |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel multiplexer with track/hold | Reduces external signal conditioning; 1.5μs acquisition time allows >600ksps channel switching with ≤1kΩ source impedance. |
| Software-configurable unipolar/bipolar mode | Single control-bit selection (UNI/BIP) enables seamless transition between 0–4.096V sensor outputs and ±2.048V transducer ranges. |
| User-adjustable digital output levels (VL pin) | Eliminates level-shifter ICs when interfacing with 3V FPGAs or ARM Cortex-M MCUs - reduces board area and EMI risk. |
| Two power-down modes (fast & full) | Full power-down cuts IDD to 2μA while preserving reference buffer bias - enables microamp-level sleep current in portable instruments. |
| SPI/MICROWIRE/TMS320-compatible interface | Direct connection to TI C2000 DSPs or STM32 MCUs without glue logic; CPOL=0/CPHA=0 configuration required. |
Applications
| Battery-Powered Instrumentation | Medical Patient Monitoring |
|---|---|
Use Scenario: Portable blood glucose meters and handheld ECG recorders requiring long battery life and sub-mV analog accuracy. IC Role / Device Role / Timing Role: Primary ADC acquiring conditioned biosensor signals at 1–10ksps; manages its own power state between samples using SHDN and PD bits. Use Value: 2μA full power-down current extends CR2032 battery life beyond 12 months in intermittent-use devices; internal reference removes calibration drift from external components. |
Use Scenario: Multi-parameter bedside monitors digitizing ECG, SpO₂, and NIBP waveforms with clinical-grade linearity. IC Role / Device Role / Timing Role: High-fidelity front-end ADC supporting both unipolar (ECG amplifier output) and bipolar (differential lead pairs) inputs with channel-to-channel matching <±0.1 LSB. Use Value: ±1 LSB INL and –85dB crosstalk ensure diagnostic waveform integrity; 133ksps sampling captures harmonics up to 50kHz for arrhythmia analysis. |
| Industrial Process Control | 5V/3V Mixed-Supply Data Acquisition |
Use Scenario: PLC analog input modules converting 4–20mA current loops and thermocouple outputs in factory automation systems. IC Role / Device Role / Timing Role: Precision ADC with programmable bipolar range (±2.048V) and robust input protection (±0.3V beyond rails) for noisy industrial environments. Use Value: Internal 4.096V reference with ±50ppm/°C TC eliminates need for ovenized references; ±1 LSB INL meets IEC 61000-4-5 surge immunity requirements. |
Use Scenario: Embedded test equipment using +5V analog sensors and +3.3V FPGA controllers on shared PCBs. IC Role / Device Role / Timing Role: Bridge ADC providing level-adaptive digital outputs (via VL pin) and noise-immune serial interface between disparate voltage domains. Use Value: VL pin set to 3.3V ensures DOUT/SSTRB drive 3.3V logic safely; 15ns aperture jitter preserves SNR in undersampling applications. |
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 +5V supply only; no internal reference; requires external 2.5V ref; SPI-only interface. | Lacks bipolar mode and SHDN-controlled power-down; lower sampling rate but higher throughput in burst mode. | Choose for cost-sensitive, unipolar-only systems where external reference is already present and 200ksps is sufficient. |
| MAX11126ETE+ | 12-bit, 1MSPS, internal 2.048V ref; 3-wire SPI (no SSTRB); 16-pin TQFN; supports 1.8V–3.6V VL range. | Higher speed and smaller package, but no ±5V analog supply support and no differential input mode. | Choose for space-constrained, high-speed 3V-only systems where differential inputs are not required and 1MSPS is needed. |
Compared with ADS7822U and MAX11126ETE+, the MAX1202BEAP+ uniquely combines internal 4.096V reference, ±5V analog supply flexibility, hardware-supported bipolar/differential modes, and three-level SHDN control - making it optimal for mixed-voltage, low-power, precision instrumentation where BOM simplicity and thermal stability are prioritized over raw speed.
Availability
MAX1202BEAP+ is available at Aetrix Electronics and suitable for battery-powered instrumentation, medical patient monitoring, industrial process control, and 5V/3V mixed-supply data acquisition requiring stable component supply across commercial temperature range (0°C to +70°C).
Supply support for MAX1202BEAP+ 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+ belongs to Maxim's precision data-acquisition ADC family, engineered for low-power, mixed-voltage embedded systems where integration of reference, track/hold, and flexible digital interface reduces system complexity and improves measurement reliability.
FAQ
What is the maximum sampling rate of the MAX1202BEAP+?
The MAX1202BEAP+ 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 the full 0°C to +70°C temperature range and supports accurate digitization of 10kHz sine-wave inputs with 70dB SINAD performance. The internal clock operates at 1.7MHz, yielding slightly lower effective throughput.
Does the MAX1202BEAP+ require an external reference voltage?
No, the MAX1202BEAP+ includes an internal 4.096V reference with ±50ppm/°C temperature coefficient, eliminating the need for an external reference. The reference buffer is enabled by default and can be adjusted via REFADJ or disabled by tying REFADJ to VDD. This distinguishes it from the MAX1203, which requires an external reference.
How does the SHDN pin function on the MAX1202BEAP+?
The SHDN pin on the MAX1202BEAP+ provides three-level control: pulled low → full shutdown (≤10μA supply current); left floating → external compensation mode (4.7μF at REF); tied to VDD → internal compensation mode. This enables precise management of reference stability and power consumption without software overhead.
Can the MAX1202BEAP+ interface directly with a 3.3V microcontroller?
Yes, the MAX1202BEAP+ interfaces directly with 3.3V microcontrollers via its VL pin: applying 3.3V to VL sets DOUT and SSTRB high-level output to ~2.8V, ensuring safe, rail-to-rail-compatible signaling. Digital inputs (DIN, SCLK, CS, SHDN) accept 3.3V logic levels natively, and the SPI/MICROWIRE interface requires no level translation.
What is the analog input configuration capability of the MAX1202BEAP+?
The MAX1202BEAP+ supports eight single-ended inputs (CH0–CH7 referenced to GND) or four pseudo-differential pairs (CH0/CH1, CH2/CH3, etc.), selected via the 3-bit SEL field in the 8-bit control byte. In differential mode, only the positive input is sampled, requiring the negative input to remain stable within ±0.1 LSB - achieved using a 0.1μF capacitor to GND.
MAX1202BEAP+ 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:
- 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+ FAQ
1.How can I place an order for MAX1202BEAP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1202BEAP+ 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+ reliable?
The price and inventory of MAX1202BEAP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1202BEAP+ is usually 5 days.
3.What payment methods are accepted for MAX1202BEAP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1202BEAP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1202BEAP+?
MAX1202BEAP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1202BEAP+ 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+?
For technical support, including MAX1202BEAP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1202BEAP+ requirements.
6.How does Aetrix verify that MAX1202BEAP+ is sourced from the original manufacturer or authorized distributors?
All MAX1202BEAP+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX1202BEAP+?
All MAX1202BEAP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1202BEAP+, 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+ part is unused and in its original packaging.
Return procedure for MAX1202BEAP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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