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Analog Devices Inc./Maxim Integrated MAX1264BEEG
- Part No.:
- MAX1264BEEG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1264BEEG.pdf
- Description:
- 8-/4-CHANNEL, 12-BIT ADC
- Quantity:
- Payment:
- Shipping:
Inventory:174
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Product details
Overview
MAX1264BEEG from Maxim Integrated is a 12-bit successive-approximation analog-to-digital converter (ADC) with 4-channel single-ended or 2-channel pseudo-differential input, +2.5V internal reference, byte-wide parallel (8+4) interface, and operation on a single +5V analog supply with user-adjustable digital logic level (+2.7V to +5.5V). It delivers 400ksps sampling at 2.5mA supply current and supports fast wake-up (2µs) from shutdown - ideal for portable patient monitoring and industrial data-logging systems.
For engineers reviewing the MAX1264BEEG datasheet, MAX1264BEEG pinout, MAX1264BEEG application, or MAX1264BEEG equivalent, this page provides verified technical context, real-world design meanings of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support details specific to the -40°C to +85°C temperature grade in 24-pin QSOP.
Technical Context
The MAX1264BEEG implements a SAR architecture with integrated track-and-hold (6MHz full-power bandwidth), software-configurable unipolar/bipolar input range, and dual acquisition modes (internal/external) controlled via an 8-bit control byte. Its 12-bit capacitive DAC uses charge redistribution and samples on WR edge transitions.
It features a high-impedance analog input multiplexer (800Ω RIN, 12pF CIN), programmable power-down (2µA shutdown current), and HBEN-controlled 12-bit data bus multiplexing (D0–D7 for LSBs, D0/D8–D3/D11 for MSBs). The VLOGIC pin decouples digital I/O voltage from analog supply, enabling direct interfacing with mixed-voltage microprocessors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 0.61mV (unipolar, VREF = 2.5V) or 1.22mV (bipolar) quantization step size. |
| Sampling Rate | 400ksps max - supports real-time capture of signals up to 200kHz Nyquist bandwidth without aliasing. |
| INL / DNL | ±0.5 LSB / ±1 LSB - ensures monotonicity and <0.012% full-scale linearity error over -40°C to +85°C. |
| Supply Current | 2.5mA at 400ksps - enables battery-powered operation with <10mW total power (VDD = VLOGIC = 5V). |
| Analog Input Range | 0V to VREF (unipolar) or ±VREF/2 (bipolar) - configurable per channel via control byte; COM referenced. |
| Reference | +2.5V internal bandgap - stable ±20ppm/°C TC, 2.49V–2.51V output, bypassed by 4.7µF capacitor at REF pin. |
| Interface | Byte-wide parallel (8+4) with CS/WR/RD/INT/HBEN - enables direct connection to 8-bit µP data buses with optional high-byte readout. |
| Acquisition Time | 3.2µs min - determines minimum inter-conversion interval when driving from low-impedance (<3kΩ) sources. |
Pinout & Package
The MAX1264BEEG is housed in a 24-pin QSOP package (5.0mm × 7.5mm body, 0.635mm pitch), optimized for space-constrained PCB layouts in portable instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 HBEN | High-Byte Enable | Selects MSB (D0/D8–D3/D11) or LSB (D0–D7) output on parallel bus; critical for 12-bit read sequencing. |
| 2–9 D7–D0/D11–D8 | Tri-State Data Bus | 8-bit bidirectional I/O lines; D0–D7 carry LSBs when HBEN=0; D0/D8–D3/D11 carry MSBs when HBEN=1. |
| 10 INT | Interrupt Output | Active-low open-drain signal indicating conversion completion and data readiness for µP polling or IRQ handling. |
| 11 RD | Read Select | Falling-edge-triggered read strobe; enables tri-state outputs only when CS is low - prevents bus contention. |
| 12 WR | Write Select | Rising-edge-triggered control latch; initiates acquisition/conversion or loads configuration byte depending on ACQMOD bit. |
| 13 CLK | Clock Input | Accepts external 100kHz–7.6MHz clock; tied to VDD/GND for internal clock mode - eliminates external oscillator BOM. |
| 14 CS | Chip Select | Active-low enable; places D0–D7 in high-impedance state when high - allows shared data bus with other peripherals. |
| 15–18 CH3–CH0 | Analog Input Channels | Four single-ended inputs (or two pseudo-differential pairs: CH0/CH1, CH2/CH3); each protected by ±300mV clamp diodes. |
| 19 COM | Common Reference | Analog ground reference for single-ended mode; must remain stable to ±0.5 LSB during conversion. |
| 20 GND | Analog & Digital Ground | Single-point ground connection; separates analog/digital return paths internally but shares pin - requires careful PCB layout. |
| 21 REFADJ | Reference Adjust/Bypass | Connect to VDD to disable internal reference when using external REF; bypassed with 0.01µF capacitor to GND. |
| 22 REF | Reference Output/Input | Delivers +2.5V internal reference; accepts external reference; requires 4.7µF capacitor to GND for stability. |
| 23 VDD | Analog Supply | +5V ±10% analog power; bypassed with 0.1µF capacitor to GND - powers T/H, SAR core, and reference circuitry. |
| 24 VLOGIC | Digital Supply | +2.7V to +5.5V logic supply; powers digital I/O buffers - enables interoperability with 3.3V or 5V µPs without level shifters. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input topology | Single-ended (4 channels) or pseudo-differential (2 pairs) via SGL/DIF bit - eliminates external multiplexer in multi-sensor systems. |
| Programmable unipolar/bipolar range | UNI/BIP bit selects 0–2.5V or ±1.25V full-scale - supports both DC-coupled sensor outputs and AC-coupled signals. |
| Dual acquisition modes | Internal (auto-timed) or external (user-controlled WR edges) - balances µP overhead vs. precise aperture timing requirements. |
| Low-power shutdown | 2µA quiescent current in full shutdown - extends battery life in intermittent-sampling applications like energy meters. |
| Integrated 6MHz T/H stage | Supports undersampling of >100kHz transients without external hold circuitry - reduces component count in high-bandwidth front-ends. |
| VLOGIC voltage flexibility | +2.7V to +5.5V digital I/O supply - permits direct interface with 3.3V FPGAs or 5V microcontrollers without level translation. |
Applications
| Patient Monitoring | Industrial Data Logging |
|---|---|
|
Use Scenario: Continuous acquisition of ECG, SpO₂, and respiration waveforms in portable bedside monitors. IC Role / Device Role / Timing Role: Primary ADC digitizing analog front-end outputs with 12-bit resolution and <2µs wake-up for responsive alarm triggering. Use Value: 400ksps sampling captures QRS complex morphology; ±0.5 LSB INL ensures clinical-grade amplitude accuracy across temperature. |
Use Scenario: Multi-sensor environmental logging (temperature, humidity, pressure) in remote industrial gateways. IC Role / Device Role / Timing Role: Low-power ADC managing periodic sampling of 4 analog sensors with automatic power-down between reads. Use Value: 2µA shutdown current extends 10-year battery life; software-selectable bipolar mode accommodates thermocouple inputs. |
| Energy Management Systems | Touch Screen Controllers |
|
Use Scenario: Real-time voltage/current measurement in smart circuit breakers and power quality analyzers. IC Role / Device Role / Timing Role: High-accuracy ADC capturing 50/60Hz mains harmonics with 6MHz T/H bandwidth for anti-aliasing. Use Value: 76dB SFDR and 67dB SINAD enable >10-bit effective resolution at 50kHz - sufficient for Class A power metering. |
Use Scenario: Resistive touch screen coordinate digitization in kiosk and HMI panels with noise-prone analog traces. IC Role / Device Role / Timing Role: 4-channel ADC scanning X+/X− and Y+/Y− electrode pairs in pseudo-differential mode to reject common-mode noise. Use Value: Channel-to-channel crosstalk <−78dB minimizes coordinate coupling; COM-referenced design simplifies touchscreen biasing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit parallel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1264ACEG | 0°C to +70°C operating range; same 24-pin QSOP, identical pinout and electrical specs except wider temp drift on INL (±1 LSB vs. ±0.5 LSB). | Suitable for commercial-grade equipment where extended temperature stability is not required. | Select MAX1264ACEG for cost-sensitive, non-industrial applications with ambient-only thermal environments. |
| ADS7822U | 8-bit resolution, SPI interface, 200ksps max, +2.7V to +5.25V supply - no internal reference, requires external REF and serial interface logic. | Applicable where lower resolution suffices and board space permits serial interface routing instead of parallel bus. | Choose ADS7822U only if system already uses SPI peripherals and 8-bit accuracy meets signal chain requirements. |
Compared with MAX1264ACEG, the MAX1264BEEG offers tighter INL (±0.5 LSB) and extended temperature range (-40°C to +85°C), making it suitable for industrial field instruments; versus ADS7822U, it provides higher resolution, parallel interface simplicity, and integrated reference - reducing BOM count and layout complexity.
Availability
MAX1264BEEG is available at Aetrix Electronics and suitable for patient monitoring, industrial data-logging, and energy management systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1264BEEG 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 MAX126x family targets low-power, high-accuracy data acquisition in space- and energy-constrained systems - emphasizing integrated references, flexible I/O, and robust performance across industrial temperature ranges.
FAQ
What is the operating temperature range for the MAX1264BEEG?
The MAX1264BEEG is rated for operation from -40°C to +85°C, as confirmed by its ordering code suffix 'E' (e.g., MAX1264BEEG). This extended industrial temperature range ensures reliable performance in harsh environments such as factory-floor controllers and outdoor energy meters, where ambient temperatures exceed commercial-grade limits.
Does the MAX1264BEEG require an external clock to operate?
No - the MAX1264BEEG supports both internal and external clock modes. When bits D7=1 and D6=0 in the control byte, the device uses its internal 6MHz clock; the CLK pin must then be tied to VDD or GND. External clock mode (D7=D6=1) accepts 100kHz–7.6MHz TTL/CMOS signals, offering timing flexibility for synchronized multi-ADC systems.
How many analog input channels does the MAX1264BEEG support in single-ended mode?
The MAX1264BEEG supports four single-ended analog input channels (CH0–CH3), as explicitly defined in the datasheet's Pin Configurations and Features sections. In pseudo-differential mode, it supports two differential pairs (CH0/CH1 and CH2/CH3), distinguishing it from the 8-channel MAX1262 variant.
Can the MAX1264BEEG interface directly with a 3.3V microprocessor?
Yes - the MAX1264BEEG's VLOGIC pin accepts +2.7V to +5.5V, allowing direct connection to 3.3V logic without level shifters. Digital outputs (D0–D7, INT, RD, WR, CS) are compatible with 3.3V CMOS thresholds, and the datasheet specifies VOH ≥ VLOGIC − 0.5V and VOL ≤ 0.4V under 1.6mA sink conditions.
What is the purpose of the HBEN pin on the MAX1264BEEG?
The HBEN (High Byte Enable) pin controls 12-bit data bus multiplexing on the MAX1264BEEG: when HBEN = 1, D0/D8–D3/D11 output the four most significant bits; when HBEN = 0, D0–D7 output the eight least significant bits. This enables efficient 12-bit reads on standard 8-bit microprocessor buses without requiring additional latches or glue logic.
MAX1264BEEG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 400k
- Number of Inputs:
- 2, 4
- Input Type:
- Pseudo-Differential, Single Ended
- Data Interface:
- Parallel
- 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:
- 4.5V ~ 5.5V
- Voltage - Supply, Digital:
- 4.5V ~ 5.8V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1264BEEG FAQ
1.How can I place an order for MAX1264BEEG through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1264BEEG 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 MAX1264BEEG reliable?
The price and inventory of MAX1264BEEG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1264BEEG is usually 5 days.
3.What payment methods are accepted for MAX1264BEEG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1264BEEG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1264BEEG?
MAX1264BEEG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1264BEEG 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 MAX1264BEEG?
For technical support, including MAX1264BEEG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1264BEEG requirements.
6.How does Aetrix verify that MAX1264BEEG is sourced from the original manufacturer or authorized distributors?
All MAX1264BEEG 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 MAX1264BEEG meets industry standards.
7.What is the process for return or replacement of MAX1264BEEG?
All MAX1264BEEG units undergo pre-shipment inspection (PSI). If there is an issue with MAX1264BEEG, 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 MAX1264BEEG part is unused and in its original packaging.
Return procedure for MAX1264BEEG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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