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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:
- IC ADC 12BIT SAR 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:150
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Product details
Overview
MAX1264BEEG+ from Maxim Integrated is a 12-bit successive-approximation analog-to-digital converter (SAR ADC) with integrated +2.5V reference, byte-wide parallel (8+4) interface, and software-configurable 4-channel single-ended or 2-channel pseudo-differential input multiplexer. It operates from a single +5V analog supply and supports digital logic levels from +2.7V to +5.5V via VLOGIC. Designed for low-power data acquisition, it delivers 400ksps sampling at 2.5mA and shuts down to 2µA between conversions.
For engineers reviewing the MAX1264BEEG+ datasheet, MAX1264BEEG+ pinout, MAX1264BEEG+ application, or MAX1264BEEG+ equivalent, this page provides verified technical context, validated pin functions, confirmed dynamic specifications (SINAD = 70dB, INL = ±0.5 LSB), real-world application mappings, and two rigorously cross-checked alternative parts for industrial and medical sensing systems.
Technical Context
The MAX1264BEEG+ implements a charge-redistribution SAR architecture with an internal track-and-hold stage offering 6MHz full-power bandwidth and 350kHz full-linear bandwidth. Its control logic accepts an 8-bit configuration byte defining acquisition mode (internal/external), unipolar/bipolar range, and channel selection - enabling flexible signal conditioning without external components.
It features dual power-down modes: standby (1.2mA) and full shutdown (2µA), both triggered by software control bits PD0/PD1. The HBEN pin enables high-byte/low-byte multiplexing of the 12-bit result on the shared D0–D7 bus, reducing I/O count while maintaining microprocessor compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for precision measurement applications |
| Max Sampling Rate | 400ksps - supports real-time monitoring of fast transients in energy metering or motor control |
| INL / DNL | ±0.5 LSB / ±1 LSB - ensures monotonicity and <0.012% integral error across temperature (−40°C to +85°C) |
| SINAD | 70dB at 50kHz - enables accurate digitization of audio-band and sensor signals with >11.6 effective bits |
| Power Consumption | 2.5mA at 400ksps, 2µA in shutdown - extends battery life in portable patient monitors and data loggers |
| Analog Input Range | 0 to +2.5V (unipolar) or ±1.25V (bipolar) - matches standard sensor outputs without external level-shifting |
| Reference | +2.5V internal bandgap - eliminates need for external reference IC and associated decoupling |
Pinout & Package
MAX1264BEEG+ is housed in a 24-pin QSOP package (5.3mm × 7.6mm, 0.635mm pitch), optimized for space-constrained PCB layouts in portable instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HBEN | High-Byte Enable | Selects MSB nibble (D8–D11) or LSB byte (D0–D7) on shared data bus - reduces microcontroller I/O footprint |
| D0/D8–D7 | Tri-State Data Bus | 8-bit bidirectional interface carrying lower byte (HBEN=0) or upper nibble (HBEN=1) - supports 8-bit µP integration |
| INT | Interrupt Output | Active-low signal asserts when conversion completes and data is valid - enables interrupt-driven firmware polling |
| WR / RD / CS | Control Inputs | Standard parallel interface handshaking - compatible with 8051, Z80, and FPGA-based controllers |
| CH0–CH3 | Analog Input Channels | Four single-ended inputs (or two pseudo-differential pairs CH0/CH1, CH2/CH3) - supports multi-sensor acquisition |
| COM | Analog Ground Reference | Stable 0V reference for single-ended mode; must remain within ±0.5 LSB during conversion |
| REF / REFADJ | Reference Buffer | Internal +2.5V reference output (REF) with adjustable gain (REFADJ) - allows fine-tuning or external reference override |
| VDD / VLOGIC | Power Supplies | Separate +5V analog rail (VDD) and programmable +2.7V to +5.5V digital rail (VLOGIC) - isolates noise-sensitive analog domain |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input mode | Single-ended (4 channels) or pseudo-differential (2 pairs) via control byte - eliminates external multiplexer ICs |
| Integrated +2.5V reference | ±2ppm/°C tempco, 2.49V–2.51V output - removes external reference cost and layout area |
| Two-tier power-down | Standby (1.2mA) and full shutdown (2µA) - enables adaptive power management in duty-cycled systems |
| External clock support | 100kHz–7.6MHz TTL/CMOS-compatible input - permits precise aperture timing for undersampling applications |
| Aperture jitter | <50ps (external acquisition mode) - preserves SNR when digitizing high-frequency signals up to 350kHz |
Applications
| Industrial Process Monitoring | Portable Patient Monitoring |
|---|---|
Use Scenario: Continuous acquisition of temperature, pressure, and flow sensor outputs in PLC-based control cabinets. IC Role / Device Role / Timing Role: Primary SAR ADC interfacing directly to 8-bit microcontrollers via parallel bus; handles 4-channel scan at 10ksps per channel. Use Value: Internal reference and bipolar input mode eliminate external signal conditioning, reducing BOM count by 3 components per channel. |
Use Scenario: Battery-powered ECG and SpO₂ modules requiring low-noise, low-power analog front-end digitization. IC Role / Device Role / Timing Role: Signal-chain ADC converting differential biopotential signals with 70dB SINAD and 2µA shutdown current. Use Value: 2.5mA active current at 400ksps enables >24-hour operation on a 2000mAh Li-ion cell in intermittent acquisition mode. |
| Energy Metering Subsystem | Touch-Screen Controller Interface |
Use Scenario: Digitizing voltage and current waveforms in Class 0.5 smart meters with anti-alias filtering. IC Role / Device Role / Timing Role: High-accuracy ADC capturing 50/60Hz fundamentals plus harmonics up to 3kHz using 350kHz full-linear bandwidth. Use Value: ±0.5 LSB INL ensures <0.1% metering error over −40°C to +85°C, meeting IEC 62053-21 requirements. |
Use Scenario: Reading resistive touch panel coordinates in handheld HMI devices with rapid channel switching. IC Role / Device Role / Timing Role: 4-channel single-ended ADC scanning X+/X−/Y+/Y− electrodes at 100ksps with automatic channel sequencing. Use Value: Software-selectable unipolar/bipolar mode accommodates both ratiometric and absolute touch voltage ranges without hardware change. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 8-bit resolution, SPI interface, no internal reference - requires external REF and level-shifting for +5V µP | Lower accuracy; suited for cost-sensitive, non-critical position sensing only | Choose only if resolution ≤8-bit and serial interface preferred over parallel |
| MAX11620AUB+ | 12-bit, 250ksps, internal reference, but uses I²C interface and 10-pin µMAX package - no HBEN or parallel bus | Lacks byte-multiplexed parallel interface; incompatible with legacy 8-bit µP designs | Select when board space is critical and I²C host controller is available |
Compared with MAX1264BEEG+, ADS7822U trades resolution and integration for lower cost and smaller size, while MAX11620AUB+ sacrifices parallel interface compatibility for ultra-compact packaging and I²C simplicity - neither offers identical feature parity in mixed-signal industrial control.
Availability
MAX1264BEEG+ is available at Aetrix Electronics and suitable for industrial process monitoring, portable patient monitoring, and energy metering applications requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, medical, and communications markets.
The MAX126x family was designed specifically for low-power, space-constrained data acquisition systems requiring integrated references and parallel microprocessor interfaces - targeting portable instrumentation and embedded control.
FAQ
What is the operating temperature range for MAX1264BEEG+?
The MAX1264BEEG+ is rated for operation from −40°C to +85°C, matching the extended industrial temperature grade (E-grade). This range is validated across all key specifications including INL (±0.5 LSB), SINAD (70dB), and power consumption (2.5mA at 400ksps), ensuring reliability in harsh environments such as factory automation and outdoor energy meters.
Does MAX1264BEEG+ require an external clock to operate?
No, MAX1264BEEG+ supports both internal and external clock modes. In internal clock mode (D7=1, D6=0), it generates its own 7.6MHz clock, eliminating external timing components. External clock mode (D7=D6=1) accepts 100kHz–7.6MHz TTL/CMOS signals for precise aperture control - critical for undersampling applications where jitter must be <50ps.
How does the HBEN pin function in MAX1264BEEG+?
The HBEN pin on MAX1264BEEG+ controls multiplexing of the 12-bit conversion result onto the 8-bit data bus: when HBEN=1, D0–D7 carry D8–D11 (MSB nibble); when HBEN=0, they carry D0–D7 (LSB byte). This enables full 12-bit readout using only 8 data lines, preserving compatibility with legacy 8-bit microprocessors without requiring additional latches or bus expanders.
Can MAX1264BEEG+ interface directly with a 3.3V microcontroller?
Yes, MAX1264BEEG+ supports direct interfacing with 3.3V microcontrollers via its VLOGIC pin, which accepts +2.7V to +5.5V digital supply voltage. When VLOGIC = 3.3V, all digital outputs (D0–D7, INT, RD, WR, CS) are 3.3V-tolerant, and input thresholds (VIH/VIL) are adjusted accordingly - no level-shifter IC is required for logic-level translation.
What is the maximum analog input voltage range for MAX1264BEEG+ in unipolar mode?
In unipolar mode, MAX1264BEEG+ accepts analog input voltages from 0V to VREF (2.5V), referenced to the COM pin. The absolute input range is GND to VDD (+5V), but for guaranteed 12-bit accuracy, signals must stay within 0V to +2.5V. Exceeding +2.5V risks code ambiguity due to internal comparator saturation, even though input protection diodes clamp up to VDD + 50mV.
MAX1264BEEG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- 5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- 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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