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Analog Devices Inc./Maxim Integrated MAX1292BEEG+
- Part No.:
- MAX1292BEEG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1292BEEG+.pdf
- Description:
- IC ADC 12BIT SAR 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,199
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Product details
Overview
MAX1292BEEG+ from Maxim Integrated is a 12-bit successive-approximation ADC with 4-channel single-ended / 2-channel pseudo-differential analog input, +2.5V internal reference, byte-wide parallel (8+4) interface, and 400ksps max sampling rate. 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 microcontrollers in portable data-acquisition systems.
For engineers reviewing the MAX1292BEEG+ datasheet, MAX1292BEEG+ pinout, MAX1292BEEG+ application, or MAX1292BEEG+ equivalent, this page delivers verified electrical specs, validated package mapping (24-pin QSOP), confirmed timing behavior (13-clock-cycle conversion, 2µs wake-up), and real-world design context for battery-powered industrial sensing and patient monitoring circuits.
Technical Context
The MAX1292BEEG+ implements a capacitive charge-redistribution SAR architecture with integrated track-and-hold, supporting both internal and external clock modes (7.6MHz max) and internal/external acquisition control. Its analog front-end allows software-selectable unipolar/bipolar and single-ended/pseudo-differential configurations via an 8-bit control byte.
Conversion is initiated by WR/CS strobes; INT asserts low upon completion. The device features tri-state digital outputs, high-byte enable (HBEN) for 12-bit data multiplexing over an 8-bit bus, and automatic power-down between conversions-reducing current to 2µA in shutdown mode while maintaining 2µs wake-up latency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 610µV step size with ±0.5 LSB INL for precision sensor digitization |
| Max Sampling Rate | 400ksps - supports real-time capture of signals up to 350kHz full-linear bandwidth |
| Analog Input Channels | 4 single-ended or 2 pseudo-differential - enables compact multi-sensor monitoring without external MUX |
| Reference | +2.5V internal bandgap - eliminates external reference component; ±2ppm/°C TC ensures stable scaling across -40°C to +85°C |
| Power Consumption | 2.5mA at 400ksps, 2µA in shutdown - extends battery life in portable medical and energy-monitoring devices |
| Digital Interface | Byte-wide parallel (8+4) with HBEN - reduces MCU bus width requirement while preserving full 12-bit resolution |
| Supply Flexibility | VDD = +5V ±10%, VLOGIC = +2.7V to +5.5V - simplifies integration with 3.3V or 5V logic domains |
Pinout & Package
MAX1292BEEG+ is housed in a 24-pin QSOP package (5.0mm × 7.5mm body, 0.635mm pitch), optimized for space-constrained PCB layouts in handheld instrumentation and embedded controllers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 HBEN | High-Byte Enable | Selects MSB nibble (D8–D11) or LSB byte (D0–D7) on shared data bus - enables 12-bit readout over 8-bit interface |
| 2–5 D7–D4 | Digital Output (Three-State) | LSB byte output lines; high-impedance when CS high - prevents bus contention during idle cycles |
| 6–9 D3/D11–D0/D8 | Multiplexed Data I/O | Shared pins carrying either D0–D3 (HBEN=0) or D8–D11 (HBEN=1) - reduces pin count without sacrificing resolution |
| 10 INT | Interrupt Output | Active-low signal indicating conversion completion and data readiness - triggers MCU ISR without polling overhead |
| 11 RD | Active-Low Read Strobe | Falling edge latches valid conversion result onto data bus - synchronizes data capture with processor timing |
| 12 WR | Active-Low Write Strobe | Rising edge loads control byte (channel, polarity, mode) and initiates acquisition/conversion sequence |
| 13 CLK | Clock Input | Accepts external 100kHz–7.6MHz TTL/CMOS clock or connects to VDD/GND for internal clock mode |
| 14 CS | Active-Low Chip Select | Enables digital interface and disables INT/Dx outputs when high - supports multi-device bus sharing |
| 15–18 CH3–CH0 | Analog Input Channels | Four single-ended inputs referenced to COM; configurable as two pseudo-differential pairs (CH0/CH1, CH2/CH3) |
| 19 COM | Analog Common Reference | Sets zero-code voltage in single-ended mode; must remain stable to ±0.5 LSB during conversion |
| 20 GND | Analog & Digital Ground | Single ground pin for mixed-signal layout - requires star grounding near REF/VDD bypass caps |
| 21 REFADJ | Reference Buffer Control | Connect to VDD to disable internal reference when using external REF; bypass with 0.01µF to GND |
| 22 REF | Reference Input/Output | Supplies +2.5V internal reference; accepts external reference when REFADJ = VDD - decoupled with 4.7µF capacitor |
| 23 VDD | +5V Analog Supply | Powers analog core and T/H stage; requires 0.1µF ceramic bypass to GND adjacent to pin |
| 24 VLOGIC | +2.7V to +5.5V Digital Supply | Controls output voltage levels and logic thresholds - isolates digital noise from analog section |
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 rework for signal range changes |
| Internal +2.5V reference with low drift | ±2ppm/°C temperature coefficient and ±100mV adjust range via REFADJ - maintains accuracy across industrial temperature range (-40°C to +85°C) |
| Low-power operation with fast wake-up | 2µA shutdown current and 2µs wake-up time - enables duty-cycled sensing in energy-harvesting applications |
| Flexible clocking architecture | Supports internal clock (no external oscillator needed) or external clock (7.6MHz max) with programmable acquisition mode - balances simplicity vs. timing precision |
| Tri-state parallel interface with HBEN | 12-bit data delivered over 8-bit bus using HBEN multiplexing - reduces MCU resource usage while retaining resolution |
| Robust analog input protection | Clamp diodes allow input swing from (GND − 300mV) to (VDD + 300mV); ±50mV limit for full-scale accuracy - simplifies front-end filtering |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
Use Scenario: Continuous measurement of temperature, pressure, and flow sensors in PLC-based factory automation systems. IC Role / Device Role / Timing Role: Primary ADC digitizing 4 analog sensor outputs with simultaneous channel sequencing and interrupt-driven data transfer. Use Value: Single-chip solution replaces discrete MUX + ADC combinations, reducing BOM count and board area while maintaining ±0.5 LSB linearity at 400ksps. |
Use Scenario: Portable ECG and SpO₂ monitors requiring low-noise, battery-efficient analog front-end digitization. IC Role / Device Role / Timing Role: High-accuracy 12-bit converter capturing biopotential signals with bipolar input support and internal reference stability. Use Value: 2.5mA active current and 2µA shutdown enable >72-hour operation on coin-cell batteries; 350kHz full-linear bandwidth preserves waveform fidelity. |
| Energy Metering Subsystem | Touchscreen Controller Interface |
Use Scenario: Residential smart meter measuring voltage/current harmonics and power quality parameters. IC Role / Device Role / Timing Role: Precision ADC sampling AC line signals in pseudo-differential mode to reject common-mode noise from switching supplies. Use Value: −78dB channel-to-channel crosstalk and 76dB IMD ensure accurate harmonic analysis; internal reference eliminates calibration drift over 10-year field life. |
Use Scenario: Resistive touchscreen digitizer in handheld HMI panels requiring rapid coordinate sampling across four corner electrodes. IC Role / Device Role / Timing Role: 4-channel single-ended ADC scanning X+/X−/Y+/Y− electrodes with software-controlled unipolar mode and fast 2µs wake-up. Use Value: 400ksps throughput enables <5ms full-screen scan; VLOGIC compatibility with 3.3V MCU eliminates level-shifter components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit parallel-output ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7816U | 8-bit resolution, SPI interface, no internal reference, 200ksps max rate | Lacks 12-bit precision and parallel interface; requires external reference and serial firmware overhead | Choose only if lower resolution and serial interface are acceptable trade-offs for cost reduction |
| MAX1162BCAP+ | 12-bit, 250ksps, internal reference, SPI interface, 20-pin TSSOP | No parallel bus; slower sampling; smaller package but incompatible pinout and protocol | Select when board space is critical and MCU supports SPI - not drop-in compatible with MAX1292BEEG+ |
Compared with ADS7816U and MAX1162BCAP+, the MAX1292BEEG+ uniquely delivers 12-bit parallel interfacing with integrated +2.5V reference and 400ksps throughput in a 24-pin QSOP - making it optimal for legacy 8051/8086-based designs requiring minimal firmware changes and guaranteed timing determinism.
Availability
MAX1292BEEG+ is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, energy metering subsystems, and touchscreen controller interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1292BEEG+ 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 applications.
The MAX1290/MAX1292 product line was designed for low-power, space-constrained data-acquisition systems requiring precision 12-bit conversion with minimal external components and flexible digital interfacing.
FAQ
What is the operating temperature range for MAX1292BEEG+?
The MAX1292BEEG+ 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 is validated across all key specifications including INL (±1 LSB), gain error (±4 LSB), and reference voltage stability (±2ppm/°C), ensuring reliable performance in harsh environments such as factory floors and outdoor medical equipment.
Does MAX1292BEEG+ require an external crystal or clock source?
No, the MAX1292BEEG+ does not require an external crystal. It supports both internal clock mode (CLK pin tied to VDD or GND) and external clock mode (driven by TTL/CMOS signal up to 7.6MHz). In internal mode, the device generates its own 6MHz clock, achieving a fixed 3.6µs conversion time - eliminating BOM cost and layout complexity associated with external timing components.
How does the HBEN pin function in MAX1292BEEG+ data readout?
The HBEN (High-Byte Enable) pin on the MAX1292BEEG+ controls multiplexing of the 12-bit conversion result onto the 8-bit data bus: when HBEN = 1, D0–D3 carry D8–D11 (MSB nibble); when HBEN = 0, D0–D7 carry the full LSB byte (D0–D7). This allows full 12-bit resolution to be read in two consecutive 8-bit cycles - essential for interfacing with 8-bit microcontrollers without external latch logic.
Can MAX1292BEEG+ operate with a 3.3V digital supply?
Yes, the MAX1292BEEG+ supports VLOGIC from +2.7V to +5.5V, fully covering 3.3V logic systems. When VLOGIC = 3.3V, the device maintains valid VOH (≥2.8V) and VOL (≤0.4V) levels per specification, and digital inputs (CS, WR, RD, HBEN) recognize VIH ≥2.0V and VIL ≤0.8V - enabling seamless interoperability with 3.3V FPGAs, ARM Cortex-M MCUs, and other low-voltage controllers.
What is the minimum acquisition time required before conversion starts in MAX1292BEEG+?
The MAX1292BEEG+ specifies a minimum acquisition time (tACQ) of 3.2µs in internal acquisition mode and 4µs in external acquisition mode, measured from WR rising edge to start of conversion. This timing is guaranteed across temperature and supply variations and accounts for internal track-and-hold settling - allowing designers to calculate maximum achievable sampling rates and verify timing margins in real-time control loops.
MAX1292BEEG+ 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:
- -
MAX1292BEEG+ FAQ
1.How can I place an order for MAX1292BEEG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1292BEEG+ 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 MAX1292BEEG+ reliable?
The price and inventory of MAX1292BEEG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1292BEEG+ is usually 5 days.
3.What payment methods are accepted for MAX1292BEEG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1292BEEG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1292BEEG+?
MAX1292BEEG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1292BEEG+ 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 MAX1292BEEG+?
For technical support, including MAX1292BEEG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1292BEEG+ requirements.
6.How does Aetrix verify that MAX1292BEEG+ is sourced from the original manufacturer or authorized distributors?
All MAX1292BEEG+ 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 MAX1292BEEG+ meets industry standards.
7.What is the process for return or replacement of MAX1292BEEG+?
All MAX1292BEEG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1292BEEG+, 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 MAX1292BEEG+ part is unused and in its original packaging.
Return procedure for MAX1292BEEG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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