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Analog Devices Inc./Maxim Integrated MAX1302BEUG+
- Part No.:
- MAX1302BEUG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX1302BEUG+.pdf
- Description:
- IC ADC 16BIT SAR 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,357
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Product details
Overview
MAX1302BEUG+ from Maxim Integrated is a 16-bit successive-approximation analog-to-digital converter (ADC) with eight single-ended or four differential analog inputs, ±6V overvoltage-tolerant inputs, software-programmable input ranges (±VREF/4 to ±2×VREF), and 115ksps maximum throughput. It operates from a single +5V analog supply and supports 2.7V–5.25V digital I/O interfacing via SPI/QSPI/MICROWIRE-compatible serial interface, targeting precision data acquisition in industrial control systems.
For engineers reviewing the MAX1302BEUG+ datasheet, MAX1302BEUG+ pinout, MAX1302BEUG+ application, or MAX1302BEUG+ equivalent, key selection considerations include its multirange bipolar/unipolar input flexibility, internal +4.096V reference, -40°C to +85°C operation, 24-pin TSSOP package, and partial/full power-down modes reducing current to 1.3mA/1µA.
Technical Context
The MAX1302BEUG+ implements a fully differential SAR architecture with integrated track-and-hold, supporting both single-ended and true differential conversions. Its analog front-end includes fault-tolerant input protection and programmable gain/offset per channel via configuration registers.
It uses separate analog (AVDD1/AVDD2) and digital (DVDD/DVDDO) supplies to isolate noise-sensitive circuitry, with dedicated ground planes (AGND1–AGND3, DGND, DGNDO) requiring star-point connection. Reference operation is selectable between internal +4.096V (±1%) and external 3.800V–4.136V sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-precision measurement of small signal variations. |
| Max Sample Rate | 115ksps - enables real-time capture of signals up to ~57.5kHz Nyquist bandwidth in continuous mode. |
| INL (Max) | ±4 LSB - ensures monotonicity and limits absolute end-point error to < ±0.06% of full-scale range. |
| Input Ranges | Seven single-ended (e.g., 0V to +VREF) and three differential (e.g., ±2×VREF) - allows direct interface to diverse sensor outputs without external signal conditioning. |
| Overvoltage Tolerance | ±6V on CH0–CH7 - protects against transient faults in industrial environments without external clamping diodes. |
| Reference Options | Internal +4.096V (±1%) or external 3.800V–4.136V - simplifies BOM by eliminating external reference ICs while maintaining accuracy across temperature. |
| Power Modes | Full power-down (1µA typ), partial power-down (1.3mA typ), active (20mA total typ) - enables adaptive power management in battery- or energy-constrained systems. |
Pinout & Package
MAX1302BEUG+ is housed in a 24-pin Thin Shrink Small Outline Package (TSSOP) with exposed pad, optimized for thermal performance and PCB space efficiency in industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 | Analog Input Channels | Eight independent voltage-input terminals; each configurable as single-ended or differential pair with software-selectable range and polarity. |
| REF / REFCAP | Reference Voltage Interface | REF accepts external reference (3.800V–4.136V) or outputs internal 4.096V; REFCAP selects mode via voltage threshold (AVDD1 − 0.4V to AVDD1 − 0.1V). |
| AVDD1 / AVDD2 | Analog Power Supplies | AVDD1 powers core ADC logic; AVDD2 powers preamplifier stage - separation minimizes noise coupling into conversion path. |
| DVDD / DVDDO | Digital Power Supplies | DVDD powers control logic/memory; DVDDO powers serial I/O buffers - enables mixed-voltage system interfacing (2.7V–5.25V). |
| CS / SCLK / DIN / DOUT / SSTRB | SPI-Compatible Serial Interface | Standard 4-wire SPI plus strobe (SSTRB) for internal clock mode; supports QSPI/MICROWIRE timing protocols without protocol translation hardware. |
| AGND1–AGND3 / DGND / DGNDO | Ground Terminals | Five isolated ground pins require low-inductance star connection near device to prevent ground bounce and maintain PSRR > ±0.5 LSB. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel input range programming | Each of eight channels independently configured for seven unipolar/bipolar ranges - eliminates need for external gain-switching multiplexers in multi-sensor systems. |
| ±6V input fault tolerance | Integrated back-to-back diode protection on all analog inputs - prevents latch-up and damage during field wiring errors or ESD events. |
| Internal +4.096V reference | 1% initial accuracy, ±30ppm/°C drift, 10mV load regulation - enables self-contained 16-bit measurement without external reference components or calibration. |
| Channel-to-channel isolation | 105dB at DC - ensures accurate simultaneous sampling of multiple sensors without crosstalk-induced measurement corruption. |
| Low-power operation modes | 1.3mA partial power-down and 1µA full power-down - extends battery life in portable DAQ devices while retaining register state and fast wake-up capability. |
Applications
| Industrial Process Monitoring | Data Acquisition Systems |
|---|---|
Use Scenario: Continuous monitoring of pressure, temperature, and flow transducers in PLC-based factory automation lines. IC Role / Device Role / Timing Role: Primary ADC digitizing 4–20mA loop signals and bridge sensor outputs with programmable gain to match varying sensor spans. Use Value: Software-configurable input ranges eliminate hardware rework when sensor types change; ±6V tolerance prevents downtime from field wiring faults. | Use Scenario: High-resolution logging of vibration, strain, and acoustic emissions in structural health monitoring equipment. IC Role / Device Role / Timing Role: Simultaneous sampling front-end converting eight analog channels at 115ksps with synchronized acquisition timing. Use Value: 105dB channel isolation preserves signal integrity across multi-channel measurements; internal reference ensures consistent scaling without external component drift. |
| Avionics Sensor Interfaces | Robotic Control Feedback |
Use Scenario: Converting analog outputs from inertial measurement units (IMUs), accelerometers, and altimeters in UAV flight controllers. IC Role / Device Role / Timing Role: Precision ADC capturing high-bandwidth sensor data with minimal latency using internal clock mode and SSTRB strobe. Use Value: -40°C to +85°C operation and 16-bit resolution meet DO-160 environmental requirements; low power-down current extends mission duration. | Use Scenario: Real-time position and torque feedback from motor current sense, joint angle encoders, and force-torque sensors in collaborative robots. IC Role / Device Role / Timing Role: Multichannel ADC providing synchronized analog inputs to motion control MCU for closed-loop servo adjustment. Use Value: Differential input support rejects common-mode noise from PWM-driven motors; software-programmable ranges adapt to varying sensor sensitivities across robot models. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8688IPWR | 8-channel, 16-bit SAR ADC with integrated programmable gain amplifier (PGA); 500ksps max rate; requires external reference; no internal reference. | Better suited for wide-dynamic-range sensor signals needing on-chip PGA gain adjustment; lacks ±6V fault tolerance. | Select when signal conditioning headroom is insufficient and PGA integration reduces board area vs. external op-amps. |
| AD7606BSTZ | 8-channel, 16-bit simultaneous-sampling SAR ADC; ±10V input range; internal reference; 200ksps per channel; requires 5V analog and 2.3–5.25V digital supply. | Superior for true simultaneous sampling across all channels; higher input voltage range but larger 64-lead LQFP package. | Select when phase-coherent multi-channel acquisition is mandatory (e.g., power quality analysis) and PCB space permits larger footprint. |
Compared with ADS8688IPWR and AD7606BSTZ, the MAX1302BEUG+ offers unique value in compact TSSOP packaging, integrated ±6V fault protection, and seamless internal/external reference switching - making it optimal for space-constrained industrial DAQ where robustness and design simplicity outweigh raw speed or simultaneous sampling needs.
Availability
MAX1302BEUG+ is available at Aetrix Electronics and suitable for industrial control systems, data-acquisition systems, avionics, and robotics requiring stable component supply, extended temperature operation (-40°C to +85°C), and RoHS-compliant packaging.
Supply support for MAX1302BEUG+ 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 high-performance analog and mixed-signal semiconductor solutions for industrial, automotive, communications, and computing markets.
The MAX1302BEUG+ belongs to Maxim's precision data-acquisition ADC product line, engineered for high-resolution, low-power, multichannel sensing in harsh environments where reliability, configurability, and integration reduce system complexity.
FAQ
What is the maximum sample rate of the MAX1302BEUG+ and under what conditions is it achieved?
The MAX1302BEUG+ achieves a maximum sample rate of 115ksps in external clock mode with fCLK = 3.5MHz and VREF = 4.096V. This rate applies to both single-ended and differential configurations. Performance remains stable across the full -40°C to +85°C operating range, with typical SNR of 88dB and SINAD of 88dB at 5kHz input frequency under these conditions. The MAX1302BEUG+ maintains this throughput without requiring external timing components.
Does the MAX1302BEUG+ support both internal and external reference voltages, and how is the selection controlled?
Yes, the MAX1302BEUG+ supports both internal +4.096V reference (±1% initial accuracy) and external reference (3.800V–4.136V). Selection is controlled by the voltage applied to the REFCAP pin: below (AVDD1 − 0.4V) enables internal reference mode; above (AVDD1 − 0.1V) enables external reference mode. Bypassing REFCAP with a 0.01µF capacitor to AGND1 sets the internal mode; connecting REFCAP to AVDD selects external mode. The MAX1302BEUG+ does not require register writes to switch modes.
What are the power-supply requirements for the MAX1302BEUG+ and how are they partitioned?
The MAX1302BEUG+ requires four independent supplies: AVDD1 (4.75V–5.25V, 3mA typ) for core ADC logic; AVDD2 (4.75V–5.25V, 17.5mA typ) for preamplifier; DVDD (4.75V–5.25V, 0.9mA typ) for digital control; and DVDDO (2.7V–5.25V, 0.2mA typ) for I/O buffers. Each supply must be bypassed to its respective ground (AGND1/AGND2/DGND/DGNDO) with a 0.1µF capacitor. All five grounds must connect at a single star point near the MAX1302BEUG+.
How does the MAX1302BEUG+ handle overvoltage conditions on its analog inputs?
The MAX1302BEUG+ provides ±6V overvoltage tolerance on all analog input pins (CH0–CH7) relative to AGND1, implemented via integrated back-to-back diode clamps. This protection operates continuously without external components and does not affect conversion accuracy during normal operation. A fault on one channel does not propagate to others due to isolated input structures. Absolute maximum ratings specify CHx to AGND1 as -6V to +6V, ensuring robustness in industrial wiring environments.
What serial interface protocols does the MAX1302BEUG+ support and what are the key timing requirements?
The MAX1302BEUG+ supports SPI, QSPI, and MICROWIRE-compatible serial interfaces using CS, SCLK, DIN, DOUT, and SSTRB pins. Key timing requirements include minimum SCLK period of 0.272µs (external clock mode), DIN setup/hold of 40ns/0ns, and DOUT valid delay of 40ns after SCLK fall. SSTRB provides ready strobe in internal clock mode; in external clock mode, it remains low. All timing parameters are guaranteed over -40°C to +85°C and do not require external level shifters for 2.7V–5.25V I/O compatibility.
MAX1302BEUG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 115k
- Number of Inputs:
- 4, 8
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-PGA-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
- Voltage - Supply, Digital:
- 5V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1302BEUG+ FAQ
1.How can I place an order for MAX1302BEUG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1302BEUG+ 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 MAX1302BEUG+ reliable?
The price and inventory of MAX1302BEUG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1302BEUG+ is usually 5 days.
3.What payment methods are accepted for MAX1302BEUG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1302BEUG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1302BEUG+?
MAX1302BEUG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1302BEUG+ 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 MAX1302BEUG+?
For technical support, including MAX1302BEUG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1302BEUG+ requirements.
6.How does Aetrix verify that MAX1302BEUG+ is sourced from the original manufacturer or authorized distributors?
All MAX1302BEUG+ 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 MAX1302BEUG+ meets industry standards.
7.What is the process for return or replacement of MAX1302BEUG+?
All MAX1302BEUG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1302BEUG+, 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 MAX1302BEUG+ part is unused and in its original packaging.
Return procedure for MAX1302BEUG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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