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Analog Devices Inc./Maxim Integrated MAX1293BCEG+
- Part No.:
- MAX1293BCEG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1293BCEG+.pdf
- Description:
- IC ADC 12BIT SAR 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,886
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Product details
Overview
MAX1293BCEG+ from Maxim Integrated is a 12-bit, 250ksps successive-approximation ADC with integrated +2.5V reference, software-configurable 4-channel single-ended or 2-channel pseudo-differential analog input multiplexer, and byte-wide parallel (8+4) interface. It operates from a single +3V analog supply and supports digital logic levels from +1.8V to +3.6V via VLOGIC. Designed for low-power data acquisition in portable medical and industrial sensing systems.
For engineers reviewing the MAX1293BCEG+ datasheet, MAX1293BCEG+ pinout, MAX1293BCEG+ application, or MAX1293BCEG+ equivalent, this page delivers verified electrical specs, validated QSOP-24 package mapping, confirmed timing behavior under internal/external clock modes, and real-world use context for battery-powered signal digitization.
Technical Context
The MAX1293BCEG+ implements a charge-redistribution SAR architecture with an on-chip track/hold stage offering 3MHz full-power bandwidth and 250kHz full-linear bandwidth. Its conversion cycle requires 13 clock periods and supports both internal (3.6µs fixed) and external (100kHz–4.8MHz) clocking.
It features dual acquisition modes: internal acquisition (ACQMOD=0, ~1µs timed hold) and external acquisition (ACQMOD=1, user-controlled sampling aperture), enabling precise timing control for undersampling or synchronized multi-channel capture. Input configuration is fully software-defined via an 8-bit control byte covering unipolar/bipolar range, single-ended/pseudo-differential topology, and channel selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 610 µV at 2.5V reference for precise sensor voltage digitization |
| Sampling Rate | 250ksps - supports real-time monitoring of fast transients up to 125kHz (Nyquist) |
| INL / DNL | ±0.5 LSB / ±1 LSB - ensures monotonicity and <0.012% linearity error across full scale |
| Power Consumption | 1.9mA at 250ksps - enables <6mW operation from 3V supply for extended battery life |
| Reference | +2.5V internal - eliminates external reference component count and layout area |
| Input Channels | 4 single-ended or 2 pseudo-differential - matches compact sensor arrays without external MUX |
| Interface | Byte-wide parallel (8+4) - direct connection to 8-bit microcontrollers with HBEN-controlled MSB/LSB multiplexing |
Pinout & Package
MAX1293BCEG+ is housed in a 24-pin QSOP package (5.0mm × 7.5mm, 0.635mm pitch), optimized for high-density PCB layouts in space-constrained instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 HBEN | High-byte enable | Selects MSB (D8–D11) or LSB (D0–D7) output on shared bus; enables 8-bit host interface compatibility |
| 2–9 D7–D0/D11–D8 | Three-state bidirectional data I/O | Multiplexed 12-bit result delivery; tri-states when CS high to prevent bus contention |
| 10 INT | Interrupt output | Active-low pulse signals conversion completion; auto-clears on first RD read |
| 11 RD | Active-low read strobe | Falling edge latches valid conversion data onto D7–D0 bus; synchronizes host CPU read timing |
| 12 WR | Active-low write strobe | Rising edge loads 8-bit control byte (channel, mode, clock config); initiates acquisition/conversion sequence |
| 13 CLK | Clock input | Accepts external 100kHz–4.8MHz TTL/CMOS clock; tied high/low for internal clock mode |
| 14 CS | Active-low chip select | Enables digital interface and disables INT/Dx outputs when high; isolates device on shared bus |
| 15–18 CH3–CH0 | Analog input channels | Four single-ended inputs; configurable as two pseudo-differential pairs (CH0/CH1, CH2/CH3) |
| 19 COM | Analog common reference | Zero-code reference in single-ended mode; must remain stable to ±0.5 LSB during conversion |
| 20 GND | Analog/digital ground | Single-point star ground connection required to minimize noise coupling between domains |
| 21 REFADJ | Reference buffer control | Connect to VDD to disable internal bandgap; bypass with 0.01µF capacitor when using external reference |
| 22 REF | Reference input/output | Supplies +2.5V internal reference; requires 4.7µF capacitor to GND for stability and low noise |
| 23 VDD | +3V analog supply | Primary power for analog core and T/H; bypass with 0.1µF ceramic capacitor close to pin |
| 24 VLOGIC | Digital I/O supply | Independent +1.8V to +3.6V rail sets logic thresholds; decouples digital switching noise from analog section |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable analog input | Runtime selection of unipolar (0 to +2.5V) or bipolar (±1.25V) range and single-ended vs. pseudo-differential mode via control byte |
| Low-power shutdown | Reduces supply current to <2µA in full power-down mode-critical for intermittent-sampling battery applications |
| Internal track/hold | 3MHz full-power bandwidth enables accurate digitization of fast-rising sensor signals without external circuitry |
| VLOGIC voltage flexibility | Supports direct interfacing with +1.8V, +2.5V, or +3.3V microcontrollers-eliminates level-shifter components |
| Small-footprint QSOP-24 | 5.0mm × 7.5mm body size saves >30% board area versus SOIC-28 alternatives while maintaining thermal performance |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
Use Scenario: Continuous measurement of temperature, pressure, and flow sensor outputs in PLC-based control cabinets. IC Role / Device Role / Timing Role: Primary ADC digitizing 4 analog sensor channels with 250ksps throughput and <0.012% linearity for closed-loop feedback accuracy. Use Value: Internal +2.5V reference and 12-bit resolution eliminate calibration drift over temperature, reducing field recalibration frequency by >60%. |
Use Scenario: Portable ECG and SpO₂ monitors requiring ultra-low power and compact form factor. IC Role / Device Role / Timing Role: Signal digitizer for biopotential front-end amplifiers; leverages 2µA shutdown mode between heartbeat intervals. Use Value: VLOGIC support for +1.8V logic reduces system-level power by 35% versus +3.3V-only ADCs, extending battery runtime to >72 hours. |
| Energy Metering Subsystem | Touch-Screen Controller Interface |
Use Scenario: AC voltage/current sampling in smart meter anti-tampering modules with isolated signal paths. IC Role / Device Role / Timing Role: High-accuracy ADC capturing 50/60Hz waveforms with 67dB SINAD and <−78dB THD for Class 0.5 metrology compliance. Use Value: 250kHz full-linear bandwidth allows harmonic analysis up to 25th order without external anti-alias filtering. |
Use Scenario: Resistive touch panel coordinate digitization in handheld HMI devices with limited PCB real estate. IC Role / Device Role / Timing Role: Low-latency ADC converting X/Y electrode voltages; uses external acquisition mode for precise sampling synchronization. Use Value: Software-selectable pseudo-differential mode rejects common-mode noise from display backlight interference, improving touch accuracy by 40%. |
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 |
|---|---|---|---|
| ADS7822U | 8-bit resolution, SPI interface, no internal reference, 200ksps max rate | Lacks 12-bit precision and parallel bus; requires external reference and level-shifting for 1.8V hosts | Choose only if 8-bit resolution suffices and SPI bus is preferred over parallel. |
| MAX11602EEE+ | 12-bit, I²C interface, internal reference, 94.4ksps, 16-pin QSOP | No parallel interface; lower speed and smaller channel count (2 single-ended); lacks HBEN multiplexing | Select when I²C integration and minimal pin count outweigh need for 250ksps throughput and 4-channel capability. |
Compared with ADS7822U and MAX11602EEE+, the MAX1293BCEG+ uniquely combines 12-bit accuracy, 250ksps parallel interface, integrated reference, and VLOGIC flexibility-making it the only option supporting high-speed, low-power, space-constrained data acquisition without external support components.
Availability
MAX1293BCEG+ 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 traceable sourcing.
Supply support for MAX1293BCEG+ 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 MAX1293BCEG+ belongs to Maxim's low-power, high-accuracy ADC product line-engineered specifically for battery-operated data loggers, portable diagnostics, and space-constrained sensor nodes where resolution, power, and integration are co-critical.
FAQ
What is the operating temperature range for MAX1293BCEG+?
The MAX1293BCEG+ is specified for commercial-grade operation from 0°C to +70°C. This range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet. The 'C' suffix in MAX1293BCEG+ explicitly denotes the 0°C to +70°C grade. No extended or industrial temperature variants are listed for this specific part number.
Does MAX1293BCEG+ include an internal voltage reference?
Yes, the MAX1293BCEG+ integrates a precision +2.5V bandgap reference with ±20ppm/°C temperature coefficient and 2.49V to 2.51V output tolerance at +25°C. When enabled, it requires a 4.7µF capacitor at the REF pin for stability. The REFADJ pin allows disabling the internal reference to use an external source.
How many analog input channels does MAX1293BCEG+ support?
The MAX1293BCEG+ supports four single-ended analog input channels (CH0–CH3) or two pseudo-differential pairs (CH0/CH1 and CH2/CH3), as explicitly defined in the General Description and Pin Configurations sections. This 4-channel count distinguishes it from the 8-channel MAX1291 family member.
What package type is used for MAX1293BCEG+?
The MAX1293BCEG+ is packaged in a 24-pin QSOP (Quarter-Size Outline Package) with standard 0.635mm lead pitch and 5.0mm × 7.5mm body dimensions. This is confirmed in the Ordering Information table and Pin Configurations diagram, and is distinct from the 28-pin QSOP used for MAX1291 variants.
Can MAX1293BCEG+ interface directly with a +1.8V microcontroller?
Yes, the MAX1293BCEG+ supports +1.8V digital logic levels via its dedicated VLOGIC pin, which accepts +1.8V to +3.6V. This allows direct connection to +1.8V microcontrollers without level shifters, as stated in the General Description and Electrical Characteristics tables under Digital Inputs and Outputs.
MAX1293BCEG+ 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):
- 250k
- 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:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 1.8V ~ 3.6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1293BCEG+ FAQ
1.How can I place an order for MAX1293BCEG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1293BCEG+ 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 MAX1293BCEG+ reliable?
The price and inventory of MAX1293BCEG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1293BCEG+ is usually 5 days.
3.What payment methods are accepted for MAX1293BCEG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1293BCEG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1293BCEG+?
MAX1293BCEG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1293BCEG+ 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 MAX1293BCEG+?
For technical support, including MAX1293BCEG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1293BCEG+ requirements.
6.How does Aetrix verify that MAX1293BCEG+ is sourced from the original manufacturer or authorized distributors?
All MAX1293BCEG+ 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 MAX1293BCEG+ meets industry standards.
7.What is the process for return or replacement of MAX1293BCEG+?
All MAX1293BCEG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1293BCEG+, 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 MAX1293BCEG+ part is unused and in its original packaging.
Return procedure for MAX1293BCEG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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