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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Analog Devices Inc./Maxim Integrated MAX1292BCEG+

Name: MAX1292BCEG+
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX1292BCEG+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX1292BCEG+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Analog to Digital Converters (ADC)

Package:: 24-SSOP (0.154", 3.90mm Width)

Datasheet:: MAX1292BCEG+.pdf

Description:: IC ADC 12BIT SAR 24QSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

MAX1292BCEG+ from Maxim Integrated is a 12-bit successive-approximation analog-to-digital converter (ADC) with integrated +2.5V reference, byte-wide parallel interface (8 + 4), and software-configurable 4-channel single-ended or 2-channel pseudo-differential analog 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 MAX1292BCEG+ datasheet, MAX1292BCEG+ pinout, MAX1292BCEG+ application, or MAX1292BCEG+ equivalent, this device offers verified 400ksps sampling rate, ±0.5 LSB INL, 6MHz full-power bandwidth track/hold, and dual power-down modes reducing current to 2µA - critical for battery-powered industrial sensors and patient monitoring front-ends.

Technical Context

The MAX1292BCEG+ implements a charge-redistribution SAR architecture with an internal 6MHz full-power bandwidth track-and-hold stage and on-chip 12-bit capacitive DAC. Its control byte (D7–D0) configures acquisition mode (internal/external), unipolar/bipolar range, single-ended/pseudo-differential input selection, and channel address (CH0–CH3).

It supports two clock modes: internal (CLK tied to VDD/GND, 3.6µs conversion time) and external (7.6MHz max, 30–70% duty cycle), with aperture jitter <200ps in internal acquisition + internal clock mode. The HBEN pin enables high-byte/low-byte multiplexing of the 12-bit result onto an 8-bit data bus.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	12-bit - delivers 1 LSB = 610µV at +2.5V reference, sufficient for 0.025% measurement precision in sensor interfaces.
Sampling Rate	400ksps maximum - supports real-time digitization of signals up to 200kHz Nyquist bandwidth, suitable for vibration monitoring and ECG waveform capture.
INL / DNL	±0.5 LSB / ±1 LSB - ensures monotonicity and <0.012% integral nonlinearity error across temperature, critical for closed-loop control accuracy.
Power Consumption	2.5mA at 400ksps, 2µA in shutdown - enables >1-year battery life in low-duty-cycle wireless sensor nodes using periodic wake-up.
Analog Input Range	0 to +2.5V (unipolar) or ±1.25V (bipolar) - matches standard transducer outputs and allows direct connection to bridge-based strain gauges without signal conditioning.
Reference	+2.5V internal bandgap (±2ppm/°C TC, ±100mV adjust range via REFADJ) - eliminates external reference component count while maintaining 0.04% stability over 0°C to +70°C.
Interface	Byte-wide parallel (D0–D7 + HBEN for D8–D11) with CS/WR/RD/INT - provides deterministic 13-clock-cycle conversion timing and interrupt-driven readout compatible with legacy 8051 and ARM7 microcontrollers.

Pinout & Package

MAX1292BCEG+ is housed in a 24-pin QSOP package (5.0mm × 7.5mm, 0.635mm pitch), optimized for space-constrained PCB layouts in handheld instrumentation and medical devices.

Pin/Terminal	Circuit Role	Design Meaning
1 HBEN	High-Byte Enable	Selects whether D0–D7 carry LSBs (HBEN=0) or MSBs (HBEN=1); enables 12-bit data transfer over 8-bit bus without glue logic.
2–9 D7–D0/D11–D8	Three-State Digital I/O	Bidirectional data bus pins; tri-state when CS high, allowing shared bus operation with other peripherals.
10 INT	Interrupt Output	Active-low open-drain signal indicating conversion completion and data readiness; simplifies polling-free firmware design.
11 RD	Active-Low Read Select	Falling edge latches conversion result onto D7–D0; synchronizes data capture with microcontroller read cycle.
12 WR	Active-Low Write Select	Rising edge loads control byte (channel, mode, clock config) and triggers acquisition/conversion sequence.
13 CLK	Clock Input	Accepts external TTL/CMOS clock (100kHz–7.6MHz) or is tied high/low to enable internal clock mode.
14 CS	Active-Low Chip Select	Enables digital interface and disables INT/Dx outputs when high; supports multi-device parallel bus configurations.
15–18 CH3–CH0	Analog Input Channels	Four single-ended inputs (or two pseudo-differential pairs: CH0/CH1, CH2/CH3); each protected by internal clamps (GND−0.3V to VDD+0.3V).
19 COM	Common Reference	Ground reference for single-ended mode; must remain stable to ±0.5 LSB during conversion to avoid code-dependent errors.
20 GND	Analog & Digital Ground	Single ground pin requiring low-impedance star connection to minimize noise coupling between analog and digital sections.
21 REFADJ	Reference Adjust/Bypass	Connect to VDD to disable internal reference; bypass to GND with 0.01µF capacitor when using external reference.
22 REF	Reference Output/Input	Supplies +2.5V reference (internal) or accepts external reference; requires 4.7µF capacitor to GND for stability.
23 VDD	+5V Analog Supply	Powers analog core and reference; must be bypassed with 0.1µF capacitor close to pin to suppress switching noise.
24 VLOGIC	+2.7V to +5.5V Digital Supply	Independent digital rail decouples logic-level requirements from analog supply, enabling mixed-voltage system integration.

Key Features

Feature	Design Value
Software-configurable input topology	Runtime selection of 4-channel single-ended or 2-channel pseudo-differential mode via control byte - eliminates hardware rework for varying sensor types (e.g., thermocouple vs. RTD).
Two-tier power-down architecture	Standby mode (1.0mA @ 100ksps) and full shutdown (2µA) - extends battery life in intermittent-sampling applications like environmental loggers.
Internal +2.5V reference with trim capability	±100mV adjustment range via REFADJ pin and ±2ppm/°C tempco - achieves calibrated accuracy without external trimming components or calibration routines.
External acquisition control	Separate WR pulses for acquisition start and conversion trigger - enables precise aperture timing synchronization with external events (e.g., laser pulse or motor commutation).
On-chip track-and-hold with 350kHz linear bandwidth	Supports accurate digitization of 50kHz sine waves (SINAD = 70dB) without external sample-hold circuitry - reduces BOM and layout complexity.

Applications

Industrial Process Monitoring	Patient Vital Sign Acquisition
Use Scenario: Continuous monitoring of temperature, pressure, and flow sensors in PLC-based factory automation systems with 4–20mA loop interfaces. IC Role / Device Role / Timing Role: Front-end ADC digitizing conditioned analog signals; provides interrupt-driven data ready signaling synchronized to 1ms control cycles. Use Value: 400ksps throughput and ±0.5 LSB INL ensure sub-0.1% measurement repeatability across 0°C to +70°C operating range, meeting IEC 61000-6-2 immunity requirements.	Use Scenario: Portable ECG and SpO₂ monitors requiring low-noise, low-power analog front-end with clinical-grade accuracy. IC Role / Device Role / Timing Role: High-fidelity digitizer for biopotential signals; uses pseudo-differential mode to reject common-mode interference from 50/60Hz mains. Use Value: 70dB SINAD at 50kHz and 6MHz T/H bandwidth preserve QRS complex morphology and pulse oximetry plethysmogram fidelity without external anti-alias filtering.
Energy Meter Data Logging	Touchscreen Controller Interface
Use Scenario: Residential smart meters capturing voltage/current waveforms for harmonic analysis and power quality reporting. IC Role / Device Role / Timing Role: Simultaneous sampling ADC for dual-channel metrology; leverages internal reference stability to maintain ±0.5% energy accuracy over 10-year product lifetime. Use Value: ±2ppm/°C reference tempco and 0.04% gain drift over temperature eliminate need for periodic field recalibration, reducing O&M costs.	Use Scenario: Resistive touchscreen digitizers in kiosks and HMIs requiring fast coordinate acquisition with minimal latency. IC Role / Device Role / Timing Role: Low-latency ADC scanning X/Y electrode voltages; uses external acquisition mode to align sampling with touch controller's drive sequence. Use Value: 2µs wake-up from shutdown and 13-clock-cycle conversion enable <100µs total coordinate update time, delivering responsive user experience.

Industrial Process Monitoring

Patient Vital Sign Acquisition

Use Scenario: Continuous monitoring of temperature, pressure, and flow sensors in PLC-based factory automation systems with 4–20mA loop interfaces.

IC Role / Device Role / Timing Role: Front-end ADC digitizing conditioned analog signals; provides interrupt-driven data ready signaling synchronized to 1ms control cycles.

Use Value: 400ksps throughput and ±0.5 LSB INL ensure sub-0.1% measurement repeatability across 0°C to +70°C operating range, meeting IEC 61000-6-2 immunity requirements.

Use Scenario: Portable ECG and SpO₂ monitors requiring low-noise, low-power analog front-end with clinical-grade accuracy.

IC Role / Device Role / Timing Role: High-fidelity digitizer for biopotential signals; uses pseudo-differential mode to reject common-mode interference from 50/60Hz mains.

Use Value: 70dB SINAD at 50kHz and 6MHz T/H bandwidth preserve QRS complex morphology and pulse oximetry plethysmogram fidelity without external anti-alias filtering.

Energy Meter Data Logging

Touchscreen Controller Interface

Use Scenario: Residential smart meters capturing voltage/current waveforms for harmonic analysis and power quality reporting.

IC Role / Device Role / Timing Role: Simultaneous sampling ADC for dual-channel metrology; leverages internal reference stability to maintain ±0.5% energy accuracy over 10-year product lifetime.

Use Value: ±2ppm/°C reference tempco and 0.04% gain drift over temperature eliminate need for periodic field recalibration, reducing O&M costs.

Use Scenario: Resistive touchscreen digitizers in kiosks and HMIs requiring fast coordinate acquisition with minimal latency.

IC Role / Device Role / Timing Role: Low-latency ADC scanning X/Y electrode voltages; uses external acquisition mode to align sampling with touch controller's drive sequence.

Use Value: 2µs wake-up from shutdown and 13-clock-cycle conversion enable <100µs total coordinate update time, delivering responsive user experience.

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
ADS7822U	8-bit resolution, SPI interface, no internal reference, 200ksps max rate	Lacks 12-bit precision and parallel interface; requires external reference and level-shifting for +2.7V logic	Choose only if 8-bit resolution suffices and SPI bus is preferred over parallel for pin-count reduction.
MAX11602EEE+	12-bit, I²C interface, internal reference, 100ksps, 8-channel, 16-pin QSOP	No parallel interface; slower sampling; smaller package but lacks HBEN multiplexing and external acquisition control	Select when I²C compatibility and ultra-low power (1.5µA shutdown) outweigh need for 400ksps throughput and deterministic timing.

Compared with ADS7822U and MAX11602EEE+, the MAX1292BCEG+ uniquely combines 400ksps parallel throughput, 12-bit accuracy, internal reference, and external acquisition control in a 24-pin QSOP - making it the only option for high-speed, precision, interrupt-driven data acquisition where microcontroller GPIO count and timing determinism are constrained.

Availability

MAX1292BCEG+ is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, and energy meter data logging requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for MAX1292BCEG+ 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 family was designed for low-power, high-accuracy data acquisition in space- and energy-constrained systems - emphasizing integrated references, flexible input configurations, and deterministic parallel interfacing without external support components.

FAQ

What is the operating temperature range for MAX1292BCEG+?

The MAX1292BCEG+ is specified for operation from 0°C to +70°C (Commercial grade). This range is confirmed in the Ordering Information table of the datasheet, where "BCEG" suffix denotes the 0°C to +70°C temperature grade with 24-pin QSOP packaging. It is not rated for extended industrial (-40°C to +85°C) operation - that variant is designated MAX1292EEG+.

Does MAX1292BCEG+ require an external clock to operate?

No, MAX1292BCEG+ supports both internal and external clock modes. When bits D7=1 and D6=0 in the control byte, the internal clock is enabled and the CLK pin must be tied to VDD or GND. In this mode, conversion time is fixed at 3.6µs. External clock operation (D7=D6=1) allows programmable timing with frequencies from 100kHz to 7.6MHz, providing flexibility for synchronization with system clocks.

How does the HBEN pin function in MAX1292BCEG+?

The HBEN (High-Byte Enable) pin on MAX1292BCEG+ controls multiplexing of the 12-bit conversion result onto the 8-bit data bus. When HBEN = 1, D0–D7 output the four MSBs (D8–D11); when HBEN = 0, they output the eight LSBs (D0–D7). This allows full 12-bit data transfer using only 8 data lines, eliminating the need for additional bus buffers or wider microcontroller ports.

Can MAX1292BCEG+ interface directly with a 3.3V microcontroller?

Yes, MAX1292BCEG+ supports direct interfacing with 3.3V microcontrollers via its VLOGIC pin. By supplying +3.3V to VLOGIC (within the +2.7V to +5.5V range), the digital I/Os (D0–D7, RD, WR, CS, INT) operate at 3.3V logic levels, while the analog section remains powered by +5V on VDD. This eliminates level-shifters and simplifies mixed-voltage system design.

What is the purpose of the REFADJ pin on MAX1292BCEG+?

The REFADJ pin on MAX1292BCEG+ serves two functions: (1) as a buffer output for the internal bandgap reference (when used with external reference circuits), and (2) as an input to disable the internal reference. To use an external reference, connect REFADJ to VDD. To fine-tune the internal +2.5V reference, apply a voltage within ±100mV of VREF to REFADJ - enabling calibration without external DACs or trimmers.

MAX1292BCEG+ 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:: 0°C ~ 70°C

Supplier Device Package:: 24-QSOP

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

MAX1292BCEG+ FAQ

1.How can I place an order for MAX1292BCEG+ through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX1292BCEG+ 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 MAX1292BCEG+ reliable?

The price and inventory of MAX1292BCEG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1292BCEG+ is usually 5 days.

3.What payment methods are accepted for MAX1292BCEG+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1292BCEG+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX1292BCEG+?

MAX1292BCEG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX1292BCEG+ 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 MAX1292BCEG+?

For technical support, including MAX1292BCEG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1292BCEG+ requirements.

6.How does Aetrix verify that MAX1292BCEG+ is sourced from the original manufacturer or authorized distributors?

All MAX1292BCEG+ 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 MAX1292BCEG+ meets industry standards.

7.What is the process for return or replacement of MAX1292BCEG+?

All MAX1292BCEG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1292BCEG+, 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 MAX1292BCEG+ part is unused and in its original packaging.

Return procedure for MAX1292BCEG+:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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