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Analog Devices Inc./Maxim Integrated MAX1284BESA+
- Part No.:
- MAX1284BESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX1284BESA+.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,770
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Product details
Overview
MAX1284BESA+ from Maxim Integrated is a 12-bit serial analog-to-digital converter (ADC) with internal +2.5V reference, single +4.5V to +5.5V supply operation, ±1 LSB INL/DNL accuracy, and 400 ksps sampling rate. It integrates a high-bandwidth track/hold, SPI/QSPI/MICROWIRE-compatible 3-wire interface, and operates across -40°C to +85°C for industrial data acquisition systems.
For engineers reviewing the MAX1284BESA+ datasheet, MAX1284BESA+ pinout, MAX1284BESA+ application, or MAX1284BESA+ equivalent, this page delivers verified electrical specs, thermal range validation, timing-critical interface behavior, and real-world design constraints for remote sensor nodes and battery-constrained instrumentation.
Technical Context
The MAX1284BESA+ employs a successive-approximation register (SAR) architecture with internal capacitive DAC and auto-zeroed comparator. Its track/hold acquires input signals in ≤468 ns and holds during conversion, enabling accurate digitization of fast transients up to 6 MHz small-signal bandwidth.
Conversion is initiated by CS falling edge and clocked by external SCLK (up to 6.4 MHz); output is unipolar MSB-first serial data with three leading zeros, requiring ≥15 SCLK rising edges per 12-bit result. Internal +2.5V reference provides 2.48 V to 2.52 V output with ±15 ppm/°C tempco and supports ≤800 µA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 4096 discrete output codes with monotonic transfer function and no missing codes over temperature. |
| Sampling Rate | 400 ksps - enables real-time capture of signals up to 350 kHz full-linear bandwidth (SINAD > 68 dB). |
| DC Accuracy | ±1 LSB INL and ±1 LSB DNL - ensures measurement linearity within ±0.024% of full scale without calibration. |
| Reference Voltage | +2.5 V internal - trimmed to 2.48–2.52 V, bypassed by 4.7 µF capacitor, stable across -40°C to +85°C. |
| Supply Range | +4.5 V to +5.5 V - single-supply operation eliminates need for dual rails or external regulators in 5 V systems. |
| Power Consumption | 2.5 mA at 400 ksps - enables low-power data logging with shutdown current < 10 µA when SHDN = GND. |
| Aperture Jitter | < 50 ps - limits SNR degradation in high-frequency sampling applications such as undersampling. |
Pinout & Package
MAX1284BESA+ is housed in an 8-pin SO (Small Outline) package, RoHS-compliant and lead-free, with standard JEDEC MO-153 footprint and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDD | Positive supply input | Accepts +4.5 V to +5.5 V; requires 0.1 µF and 10 µF bypassing to analog ground for noise-sensitive operation. |
| 2 AIN | Analog input | Unipolar 0 V to +2.5 V range referenced to internal VREF; protected by clamping diodes to VDD/GND. |
| 3 SHDN | Active-low shutdown control | Pulling low reduces supply current to < 10 µA; wake-up delay depends on REF capacitor discharge time. |
| 4 REF | Internal reference output | Provides +2.5 V ±20 mV; must be bypassed with 4.7 µF capacitor; disabled during shutdown. |
| 5 GND | Analog and digital ground | Single-point star ground connection required; separates analog and digital return paths to minimize noise coupling. |
| 6 DOUT | Serial data output | Three-state CMOS output; transitions 20 ns after SCLK rising edge; high-impedance when CS = high. |
| 7 CS | Active-low chip select | Falling edge initiates conversion and enables DOUT; must remain low for ≥15 SCLK cycles to read full 12-bit result. |
| 8 SCLK | Serial clock input | Drives conversion timing and data shift-out; accepts 0.5–6.4 MHz clock with 40–60% duty cycle. |
Key Features
| Feature | Design Value |
|---|---|
| Internal track/hold | Acquisition time ≤468 ns enables accurate sampling of fast-changing sensor outputs without external circuitry. |
| SPI/QSPI/MICROWIRE compatibility | 3-wire interface connects directly to microcontroller peripherals without level shifters or glue logic. |
| +2.5 V internal reference | Eliminates external reference IC and associated layout complexity while maintaining ±15 ppm/°C stability. |
| Low power at full speed | 2.5 mA supply current at 400 ksps allows continuous high-rate acquisition in thermally constrained enclosures. |
| Industrial temperature range | -40°C to +85°C operation validated across all DC and dynamic specifications ensures reliability in field-deployed equipment. |
Applications
| Portable Data Logging | Data Acquisition |
|---|---|
|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure at 100 Hz intervals over weeks. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog outputs from precision sensors with minimal power overhead. Use Value: 2.5 mA active current and <10 µA shutdown current extend battery life; internal reference avoids calibration drift across temperature. |
Use Scenario: Industrial PLC module acquiring 8-channel analog inputs from strain gauges and RTDs in factory automation. IC Role / Device Role / Timing Role: High-accuracy front-end ADC providing synchronized 12-bit samples with deterministic 2.5 µs conversion time. Use Value: ±1 LSB INL/DNL and 70 dB SINAD ensure repeatability in closed-loop control; SO-8 package simplifies multi-channel PCB layout. |
| Medical Instruments | Process Control |
|
Use Scenario: Portable ECG monitor capturing biopotential signals with low-noise front-end amplification and anti-alias filtering. IC Role / Device Role / Timing Role: Precision ADC converting amplified differential leads with 6 MHz small-signal bandwidth for transient fidelity. Use Value: Aperture jitter <50 ps preserves signal integrity; internal reference eliminates external component failure modes in certified medical hardware. |
Use Scenario: Distributed I/O module in chemical plant monitoring pH, flow, and level transmitters with 4–20 mA loop interfaces. IC Role / Device Role / Timing Role: Isolated analog input stage ADC handling ratiometric measurements referenced to stable internal 2.5 V. Use Value: Full-scale range of 0–2.5 V matches common sensor output spans; -40°C to +85°C rating ensures uptime in harsh ambient conditions. |
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 | 2.7 V to 5.25 V supply; 200 ksps max; external reference required; no internal T/H. | Lacks integrated track/hold and internal reference - requires additional components for equivalent functionality. | Select when lower cost and simpler supply scheme outweigh need for internal reference and higher speed. |
| MAX11131AUT+ | 12-bit, 500 ksps, +2.7 V to +3.6 V supply; internal reference; SPI-only interface; 6-pin SOT23 package. | Lower voltage operation and smaller footprint - but not rated for -40°C to +85°C industrial range. | Prefer for space-constrained, battery-powered designs where extended temperature is not required. |
Compared with ADS7822U and MAX11131AUT+, the MAX1284BESA+ uniquely combines industrial temperature rating, internal track/hold, and 400 ksps throughput with a self-contained +2.5 V reference - reducing BOM count and layout risk in ruggedized measurement systems.
Availability
MAX1284BESA+ is available at Aetrix Electronics and suitable for portable data logging, industrial process monitoring, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1284BESA+ 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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and communications applications.
The MAX1284BESA+ belongs to Maxim's high-accuracy, low-power serial ADC product line, engineered for space- and power-constrained systems needing reliable 12-bit resolution without external reference or track/hold circuitry.
FAQ
What is the operating temperature range of the MAX1284BESA+?
The MAX1284BESA+ is specified for continuous operation from -40°C to +85°C. All key parameters-including INL, DNL, SINAD, reference voltage, and conversion time-are guaranteed across this full industrial temperature range, making it suitable for deployment in outdoor, automotive under-hood, and factory-floor environments where thermal extremes occur.
Does the MAX1284BESA+ require an external reference voltage?
No, the MAX1284BESA+ includes a factory-trimmed +2.5 V internal reference with 2.48 V to 2.52 V tolerance and ±15 ppm/°C temperature coefficient. The REF pin must be bypassed with a 4.7 µF capacitor to maintain accuracy and stability; no external reference IC is needed for standard 0–2.5 V input range applications.
How many clock cycles are required to read a full conversion result from the MAX1284BESA+?
A minimum of 15 SCLK rising edges is required to read the complete 12-bit conversion result from the MAX1284BESA+. The serial output format consists of three leading zeros followed by the 12 data bits (MSB first), and DOUT transitions 20 ns after each SCLK rising edge. CS must remain low throughout all 15 cycles.
Can the MAX1284BESA+ interface directly with an SPI master controller?
Yes, the MAX1284BESA+ is fully compatible with SPI, QSPI, and MICROWIRE protocols. When interfacing with an SPI master, configure CPOL = 0 and CPHA = 0. DOUT is driven on SCLK rising edge, and two byte-reads (first containing 3 leading zeros + 5 bits, second containing remaining 7 bits + 1 trailing zero) retrieve the full result.
What is the maximum analog input frequency the MAX1284BESA+ can accurately digitize?
The MAX1284BESA+ has a full-linear bandwidth of 350 kHz (SINAD > 68 dB) and a full-power bandwidth of 6 MHz. While its Nyquist-limited sampling rate is 200 kHz, it supports undersampling techniques for higher-frequency signals-provided anti-alias filtering is applied and aperture jitter (<50 ps) is accounted for in system-level SNR budgeting.
MAX1284BESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1284BESA+ FAQ
1.How can I place an order for MAX1284BESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1284BESA+ 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 MAX1284BESA+ reliable?
The price and inventory of MAX1284BESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1284BESA+ is usually 5 days.
3.What payment methods are accepted for MAX1284BESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1284BESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1284BESA+?
MAX1284BESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1284BESA+ 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 MAX1284BESA+?
For technical support, including MAX1284BESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1284BESA+ requirements.
6.How does Aetrix verify that MAX1284BESA+ is sourced from the original manufacturer or authorized distributors?
All MAX1284BESA+ 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 MAX1284BESA+ meets industry standards.
7.What is the process for return or replacement of MAX1284BESA+?
All MAX1284BESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1284BESA+, 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 MAX1284BESA+ part is unused and in its original packaging.
Return procedure for MAX1284BESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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