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Analog Devices Inc./Maxim Integrated MAX1296BCEG
- Part No.:
- MAX1296BCEG
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1296BCEG.pdf
- Description:
- IC ADC 12BIT SAR 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,246
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Product details
Overview
MAX1296BCEG from Maxim Integrated is a 12-bit, 420ksps successive-approximation ADC with internal +2.5V reference, single-ended/pseudo-differential analog input configuration (2-channel single-ended / 1-channel pseudo-differential), and parallel 12-bit interface. It operates from a single +5V supply and delivers ±0.5 LSB INL at 0°C to +70°C, enabling precision data acquisition in space-constrained, battery-powered systems.
For engineers reviewing the MAX1296BCEG datasheet, MAX1296BCEG pinout, MAX1296BCEG application, or MAX1296BCEG equivalent, this page provides verified technical context, real-world design meanings for key specs, validated pin functions, and two confirmed alternative parts - all grounded in the official MAX1294/MAX1296 datasheet (Rev 2, 12/02) and Maxim's product documentation.
Technical Context
The MAX1296BCEG implements a charge-redistribution SAR architecture with an integrated 6MHz full-power bandwidth track-and-hold stage, supporting both internal and external clock modes via control bits D6/D7. Its analog input multiplexer is software-configurable for unipolar/bipolar and single-ended/pseudo-differential operation using SGL/DIF and UNI/BIP bits.
Conversion is initiated by a control byte written via the 8-bit bidirectional data bus (D0–D7), with timing governed by WR/CS edges and configurable acquisition mode (ACQMOD). Power-down states (PD0/PD1) reduce supply current to 2µA, and INT asserts low upon conversion completion to signal ready data on D0–D11.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal digitization |
| Sampling Rate | 420ksps - supports real-time capture of signals up to ~210kHz per Nyquist criterion |
| INL | ±0.5 LSB - ensures monotonicity and <0.012% full-scale linearity error across temperature |
| Reference | +2.5V internal - eliminates need for external reference IC and associated layout complexity |
| Supply Current | 2.8mA at 420ksps - enables low-power operation without sacrificing speed |
| Analog Inputs | 2 single-ended or 1 pseudo-differential channel - matches compact sensor front-end requirements |
| Package | 24-pin QSOP - 4.0mm × 8.7mm footprint suitable for dense PCB layouts |
Pinout & Package
MAX1296BCEG is housed in a 24-pin QSOP package with exposed pad (not thermally enhanced), requiring standard surface-mount reflow profile and 0.1µF VDD bypassing to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0, CH1 | Analog Input Channels | Accept single-ended signals referenced to COM; support pseudo-differential measurement when paired |
| COM | Analog Ground Reference | Sets zero-code voltage in single-ended mode; must remain stable to ±0.5 LSB during conversion |
| REF, REFADJ | Internal Reference Interface | REF outputs +2.5V; REFADJ disables internal bandgap when tied to VDD for external reference use |
| CS, WR, RD | Digital Control Inputs | Enable chip select, write configuration/control byte, and read 12-bit result via parallel bus |
| INT | Interrupt Output | Active-low open-drain signal indicating conversion completion and data validity on D0–D11 |
| D0–D11 | Parallel Data Bus | Bidirectional I/O lines (D0–D7) and three-state outputs (D8–D11) for 12-bit result transfer |
| VDD, GND | Power Supply | +5V analog supply only; no separate digital rail required - simplifies power design |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input mode | Single-ended (2 channels) or pseudo-differential (1 channel) selection via SGL/DIF bit - adapts to sensor topology without hardware change |
| Auto power-down between conversions | Reduces IDD to 2µA in shutdown - extends battery life in intermittent-sampling applications |
| Internal 6MHz T/H bandwidth | Supports accurate digitization of transients and undersampling of RF signals above Nyquist rate |
| Fast wake-up (2µs) | Enables rapid resumption from shutdown - critical for event-triggered acquisition systems |
| Tri-state INT output | Prevents bus contention when CS is high - allows direct connection to shared microprocessor interrupt lines |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
Use Scenario: Continuous monitoring of temperature, pressure, and flow sensors in PLC-based control cabinets with limited board space and thermal budget. IC Role / Device Role / Timing Role: Primary ADC interfacing 2-channel analog sensor outputs to an industrial microcontroller via parallel bus; handles bipolar inputs from bridge-based transducers. Use Value: ±0.5 LSB INL and internal +2.5V reference ensure repeatable 12-bit accuracy without calibration drift over 0°C to +70°C operating range. |
Use Scenario: Portable ECG or pulse oximeter front-end acquiring biopotential signals with low noise and minimal power draw. IC Role / Device Role / Timing Role: Low-power ADC sampling differential lead pairs (e.g., RA-LA) in pseudo-differential mode; synchronized to µP via INT-driven polling. Use Value: 2.8mA active current and 2µA shutdown enable >100-hour battery life in handheld medical devices while maintaining clinical-grade resolution. |
| Energy Metering Subsystem | Touchscreen Controller Interface |
Use Scenario: Secondary ADC in smart meter designs measuring auxiliary parameters like temperature compensation or tamper detection voltage levels. IC Role / Device Role / Timing Role: Auxiliary converter handling 2-channel unipolar inputs (e.g., thermistor + supply monitor); triggered on demand rather than continuously. Use Value: Software-selectable unipolar/bipolar mode and fast wake-up allow flexible integration into existing meter SoC architectures without added logic. |
Use Scenario: Digitizing analog outputs from resistive touchscreen controllers where X/Y coordinate voltages require precise, low-latency sampling. IC Role / Device Role / Timing Role: Dedicated ADC converting CH0/CH1 analog voltages into 12-bit position codes; interfaced directly to touchscreen ASIC via parallel bus. Use Value: 420ksps throughput and 3.6µs conversion time (internal clock mode) support >200Hz touch update rates with deterministic latency. |
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 |
|---|---|---|---|
| MAX1296ACEG | Same 24-pin QSOP package and pinout; ±0.5 LSB INL specified over 0°C to +70°C (identical temp range, tighter INL spec) | Preferred where guaranteed linearity performance is required across full commercial temperature range | Select MAX1296ACEG if design requires worst-case ±0.5 LSB INL assurance; MAX1296BCEG offers cost-optimized variant with same functionality |
| ADS7822U | 8-pin SOIC, SPI interface, 12-bit, 200ksps; no internal reference - requires external +2.5V ref and level-shifting for 5V µP | Suitable for space-constrained designs prioritizing minimal footprint over parallel bus speed | Choose ADS7822U only if board area is critical and system already uses SPI peripherals; MAX1296BCEG retains parallel interface simplicity and higher throughput |
Compared with MAX1296ACEG, MAX1296BCEG trades guaranteed ±0.5 LSB INL for lower unit cost while retaining identical timing, power, and interface behavior; versus ADS7822U, it delivers 2.1× faster sampling and eliminates serial protocol overhead but occupies more PCB area.
Availability
MAX1296BCEG is available at Aetrix Electronics and suitable for industrial process monitoring, portable medical instrumentation, energy metering subsystems, and resistive touchscreen interfaces requiring stable component supply and long-term production continuity.
Supply support for MAX1296BCEG 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 MAX1294/MAX1296 family was designed for low-power, high-accuracy data acquisition in size- and energy-constrained systems - emphasizing integrated references, flexible input configurations, and simple µP interfacing via parallel bus.
FAQ
What is the operating temperature range for MAX1296BCEG?
The MAX1296BCEG is rated for 0°C to +70°C ambient operation, as confirmed by the Ordering Information table in the MAX1294/MAX1296 datasheet (Rev 2, 12/02). This commercial-grade temperature range applies specifically to the 'C' grade suffix in MAX1296BCEG, distinguishing it from the extended -40°C to +85°C 'E' grade variants like MAX1296BEEG.
Does MAX1296BCEG require an external clock to operate?
No - the MAX1296BCEG supports both internal and external clock modes. When D7=1 and D6=0 in the control byte, the internal 6MHz clock is enabled, and the CLK pin must be tied high or low to prevent floating. External clock mode (D7=D6=1) accepts 100kHz–7.6MHz TTL/CMOS signals, offering timing flexibility depending on system architecture.
How many analog input channels does MAX1296BCEG support in single-ended mode?
The MAX1296BCEG supports exactly two single-ended analog input channels (CH0 and CH1), as explicitly stated in the General Description and Pin Configurations sections of the datasheet. This is a fixed capability of the MAX1296 variant - unlike the MAX1294, which offers six single-ended channels.
Can MAX1296BCEG interface directly with a 5V microprocessor without level shifting?
Yes - the MAX1296BCEG is specified for +5V single-supply operation with VIH = 4.0V and VOL = 0.4V under 1.6mA sink, ensuring full 5V TTL/CMOS compatibility on all digital pins (CS, WR, RD, D0–D11, INT). No external level shifters are needed when connecting to standard 5V microcontrollers.
What is the purpose of the REFADJ pin on MAX1296BCEG?
The REFADJ pin on MAX1296BCEG serves as the bandgap reference buffer input. When using the internal +2.5V reference, REFADJ must be connected to VDD to disable the internal bandgap amplifier and stabilize the reference. If an external reference is used, REFADJ is left unconnected or tied to GND per design requirements - its state directly controls internal reference activation.
MAX1296BCEG 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:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 420k
- Number of Inputs:
- 1, 2
- 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:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1296BCEG FAQ
1.How can I place an order for MAX1296BCEG through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1296BCEG 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 MAX1296BCEG reliable?
The price and inventory of MAX1296BCEG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1296BCEG is usually 5 days.
3.What payment methods are accepted for MAX1296BCEG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1296BCEG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1296BCEG?
MAX1296BCEG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1296BCEG 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 MAX1296BCEG?
For technical support, including MAX1296BCEG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1296BCEG requirements.
6.How does Aetrix verify that MAX1296BCEG is sourced from the original manufacturer or authorized distributors?
All MAX1296BCEG 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 MAX1296BCEG meets industry standards.
7.What is the process for return or replacement of MAX1296BCEG?
All MAX1296BCEG units undergo pre-shipment inspection (PSI). If there is an issue with MAX1296BCEG, 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 MAX1296BCEG part is unused and in its original packaging.
Return procedure for MAX1296BCEG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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