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Analog Devices Inc./Maxim Integrated MAX1264AEEG+
- Part No.:
- MAX1264AEEG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- -
- Datasheet:
-
MAX1264AEEG+.pdf
- Description:
- IC ADC 12BIT 400KSPS 24-QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:150
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Product details
Overview
MAX1264AEEG+ from Maxim Integrated is a 12-bit successive-approximation analog-to-digital converter (SAR ADC) with integrated +2.5V reference, byte-wide parallel interface (8 + 4), and software-configurable 4-channel single-ended or 2-channel pseudo-differential input. It operates from a single +5V analog supply and supports digital logic levels from +2.7V to +5.5V via VLOGIC, enabling direct interfacing with mixed-voltage microprocessors in portable data-acquisition systems.
For engineers reviewing the MAX1264AEEG+ datasheet, MAX1264AEEG+ pinout, MAX1264AEEG+ application, or MAX1264AEEG+ equivalent, this device is selected for low-power, space-constrained designs requiring 400ksps sampling, ±0.5 LSB INL, internal track/hold (6MHz full-power bandwidth), and fast wake-up (2µs) from shutdown - especially where analog input flexibility and supply current under 2.5mA at full rate are critical.
Technical Context
The MAX1264AEEG+ implements a charge-redistribution SAR architecture with an internal 12-bit capacitive DAC and on-chip track-and-hold stage. Its conversion cycle requires exactly 13 clock cycles, supporting both internal (6MHz nominal) and external clock modes (100kHz–7.6MHz).
It features dual acquisition modes: internal acquisition (timed by internal logic, ~1µs in internal clock mode) and external acquisition (user-controlled WR edges), allowing precise aperture control. Input configuration is fully software-selectable via an 8-bit control byte defining unipolar/bipolar range, single-ended/pseudo-differential topology, channel selection (CH0–CH3), and power-down state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes with monotonic transfer function and no missing codes over temperature. |
| Sampling Rate | 400ksps maximum - enables real-time capture of signals up to 200kHz Nyquist bandwidth; actual throughput depends on interface timing and acquisition mode. |
| INL / DNL | ±0.5 LSB / ±1 LSB - ensures high code-to-code linearity critical for precision measurement in industrial control and patient monitoring. |
| Supply Current | 2.5mA at 400ksps (VDD = VLOGIC = +5V) - enables battery operation with <10mW total power; drops to 2µA in shutdown mode. |
| Analog Input Range | Single-ended: 0V to +2.5V (unipolar) or –1.25V to +1.25V (bipolar); pseudo-differential: |CHx – CHy| up to ±2.5V - supports flexible sensor interfacing without external signal conditioning. |
| Reference | +2.5V internal bandgap reference (±2ppm/°C TC, ±100mV adjust range via REFADJ) - eliminates need for external reference component while maintaining stability across –40°C to +85°C. |
| Interface | Byte-wide parallel (D0–D7 + D8–D11 multiplexed via HBEN) with active-low CS/WR/RD/INT - provides direct, low-latency connection to 8-bit µPs and FPGAs without glue logic. |
Pinout & Package
MAX1264AEEG+ is housed in a 24-pin QSOP package (5.0mm × 7.5mm, 0.635mm pitch), optimized for high-density PCB layouts in portable instrumentation and embedded sensors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HBEN | High-byte enable control | Selects between 8-bit LSB (HBEN = 0) or 4-bit MSB (HBEN = 1) output on D0–D7 bus - enables efficient data readout in resource-constrained systems. |
| D0/D8–D3/D11 | Multiplexed bidirectional data lines | Tri-state outputs deliver 12-bit result in two 8-bit reads; avoids need for 12-bit wide bus or FIFO buffering. |
| INT | Open-drain interrupt output | Signals conversion completion asynchronously; allows µP to enter low-power wait state until ready - reduces system-level power consumption. |
| WR / RD / CS | Control strobes | Standard parallel interface timing (tCS = 100ns min, tWR = 60ns min) compatible with legacy 8051, Z80, and FPGA controllers without custom timing logic. |
| CH0–CH3 | Analog input channels | Four dedicated single-ended inputs; configurable as two pseudo-differential pairs (CH0/CH1, CH2/CH3) - supports differential sensor bridges or noise-rejecting measurements. |
| COM | Analog common reference | Sets zero-code voltage in single-ended mode; must remain stable to ±0.5 LSB during conversion - requires low-impedance grounding and decoupling. |
| REF / REFADJ | Reference buffer I/O | REF outputs +2.5V internal reference (4.7µF bypass required); REFADJ adjusts reference or disables internal bandgap when external reference is used. |
| VDD / VLOGIC | Separate analog/digital supplies | VDD = +5V ±10% powers analog core; VLOGIC = +2.7V to +5.5V sets digital I/O voltage - isolates noise-sensitive analog section from noisy digital domains. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input topology | Runtime selection of unipolar/bipolar and single-ended/pseudo-differential modes via 8-bit control byte - eliminates hardware jumpers and enables adaptive signal conditioning in firmware. |
| Two-stage power management | Standby mode (1.0mA at 100ksps) and full shutdown (<2µA) with 2µs wake-up - extends battery life in intermittent-sampling applications like energy meters and remote sensors. |
| Internal 6MHz track/hold | Full-power bandwidth supports undersampling of RF or transient signals beyond Nyquist; 350kHz full-linear bandwidth ensures accuracy for audio and sensor waveforms. |
| Input protection diodes | Clamps analog inputs to GND–300mV and VDD+300mV - prevents damage from ESD or overvoltage transients without external TVS components. |
| Aperture jitter ≤200ps | Enables >70dB SINAD at 175kHz input frequency - meets requirements for high-fidelity medical waveform digitization and precision test equipment. |
Applications
| Industrial Control Systems | Data-Acquisition Systems |
|---|---|
Use Scenario: Monitoring temperature, pressure, and flow in PLC-based factory automation with distributed analog sensors. IC Role / Device Role / Timing Role: 12-bit SAR ADC digitizing 4-channel 4–20mA loop signals at 100ksps with bipolar input support for differential transducer outputs. Use Value: Internal +2.5V reference and software-configurable inputs eliminate calibration drift and reduce BOM count versus discrete reference + mux solutions. |
Use Scenario: Portable handheld meter capturing multi-sensor environmental data (voltage, current, thermocouple) in field service tools. IC Role / Device Role / Timing Role: Low-power ADC performing burst-mode sampling with 2µs wake-up and <2.5mA active current to maximize battery runtime. Use Value: 24-pin QSOP footprint and parallel interface enable compact, cost-effective design without FPGA or level-shifter ICs. |
| Energy Management | Patient Monitoring |
Use Scenario: Smart electricity meter measuring voltage/current harmonics and power quality parameters in residential AMI deployments. IC Role / Device Role / Timing Role: High-accuracy ADC acquiring synchronized voltage and current samples at 400ksps for FFT-based harmonic analysis. Use Value: ±0.5 LSB INL and 67dB SINAD ensure compliance with IEC 62053-22 Class 0.5 accuracy requirements for revenue-grade metering. |
Use Scenario: Bedside vital signs monitor digitizing ECG, respiration, and SpO₂ analog front-end signals in clinical environments. IC Role / Device Role / Timing Role: Medical-grade ADC providing isolated, low-noise 12-bit conversion with pseudo-differential inputs to reject common-mode interference. Use Value: Internal track/hold and 200ps aperture jitter preserve signal integrity for diagnostic-quality waveform reproduction per IEC 60601-2-27. |
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 |
|---|---|---|---|
| ADS7816U | 12-bit, 200ksps, SPI interface, no internal reference - requires external REF and level-shifting for +2.7V logic. | Better suited for low-pin-count, low-data-rate systems with existing SPI infrastructure; lacks parallel bus and internal reference convenience. | Choose ADS7816U when board space is extremely constrained and µP lacks parallel port but has spare SPI resources. |
| MAX11604EEE+ | 12-bit, 94.4ksps, I²C interface, internal 2.048V reference, 8-channel single-ended only - no pseudo-differential or bipolar mode. | Ideal for simple sensor polling in IoT nodes; lacks high-speed parallel interface and flexible input configuration of MAX1264AEEG+. | Choose MAX11604EEE+ for ultra-low-power, low-complexity applications where sampling rate and input flexibility are secondary to integration and ease of firmware implementation. |
Compared with ADS7816U and MAX11604EEE+, the MAX1264AEEG+ delivers higher throughput (400ksps vs. 200ksps/94ksps), native parallel interface for deterministic timing, and full input configurability (unipolar/bipolar, single-ended/pseudo-differential) - making it optimal for real-time embedded systems requiring both speed and analog signal adaptability.
Availability
MAX1264AEEG+ is available at Aetrix Electronics and suitable for industrial control systems, portable data-acquisition devices, and energy management equipment requiring stable component supply across extended temperature ranges (–40°C to +85°C) and long-term production continuity.
Supply support for MAX1264AEEG+ 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 MAX1262/MAX1264 family was designed for low-power, high-accuracy data acquisition in space- and energy-constrained applications - emphasizing integrated references, flexible input topologies, and robust parallel interfacing without external support components.
FAQ
What is the operating temperature range for the MAX1264AEEG+?
The MAX1264AEEG+ is rated for operation from –40°C to +85°C, as indicated by the "E" grade suffix in its ordering code. This extended industrial temperature range ensures reliable performance in harsh environments such as factory floors, outdoor energy meters, and medical equipment enclosures without forced cooling.
Does the MAX1264AEEG+ require an external clock source?
No - the MAX1264AEEG+ supports both internal and external clock modes. In internal clock mode (configured via control byte bits D7/D6), it generates its own 6MHz clock, eliminating the need for an external oscillator. The CLK pin must be tied to VDD or GND in this mode to prevent floating.
How does the HBEN pin affect data readout on the MAX1264AEEG+?
The HBEN (High Byte Enable) pin determines how the 12-bit conversion result is presented on the 8-bit data bus: when HBEN = 0, D0–D7 carry the 8 LSBs; when HBEN = 1, D0–D3 carry the 4 MSBs. This multiplexing allows full 12-bit resolution using only an 8-bit interface, reducing PCB routing complexity.
Can the MAX1264AEEG+ interface directly with a 3.3V microprocessor?
Yes - the MAX1264AEEG+ features a dedicated VLOGIC pin that accepts +2.7V to +5.5V, enabling direct connection to 3.3V µPs without level shifters. Digital outputs (D0–D11, INT, RD, WR, CS) are referenced to VLOGIC, ensuring compatible logic thresholds and drive strength.
What is the purpose of the COM pin on the MAX1264AEEG+?
The COM pin serves as the analog ground reference for single-ended input mode and the negative input reference in pseudo-differential mode. In single-ended operation, it sets the zero-code voltage; its stability to ±0.5 LSB during conversion is essential for achieving specified INL and DNL performance.
MAX1264AEEG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- -
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
MAX1264AEEG+ FAQ
1.How can I place an order for MAX1264AEEG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1264AEEG+ 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 MAX1264AEEG+ reliable?
The price and inventory of MAX1264AEEG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1264AEEG+ is usually 5 days.
3.What payment methods are accepted for MAX1264AEEG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1264AEEG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1264AEEG+?
MAX1264AEEG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1264AEEG+ 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 MAX1264AEEG+?
For technical support, including MAX1264AEEG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1264AEEG+ requirements.
6.How does Aetrix verify that MAX1264AEEG+ is sourced from the original manufacturer or authorized distributors?
All MAX1264AEEG+ 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 MAX1264AEEG+ meets industry standards.
7.What is the process for return or replacement of MAX1264AEEG+?
All MAX1264AEEG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1264AEEG+, 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 MAX1264AEEG+ part is unused and in its original packaging.
Return procedure for MAX1264AEEG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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