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Analog Devices Inc./Maxim Integrated MAX1297ACEG+T
- Part No.:
- MAX1297ACEG+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1297ACEG+T.pdf
- Description:
- IC ADC 12BIT SAR 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,932
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Product details
Overview
MAX1297ACEG+T from Maxim Integrated is a 12-bit, 265ksps successive-approximation ADC with integrated +2.5V reference, software-configurable 2-channel single-ended or 1-channel pseudo-differential analog input, and parallel 12-bit interface. It operates from a single +2.7V to +3.6V supply, consumes only 1.9mA at full speed, and features fast 2µs wake-up from shutdown - ideal for portable patient monitoring and battery-powered data loggers.
For engineers reviewing the MAX1297ACEG+T datasheet, MAX1297ACEG+T pinout, MAX1297ACEG+T application, or MAX1297ACEG+T equivalent, this page delivers verified electrical specs, validated QSOP-24 pin functions, real-world use cases in energy management and industrial control, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The MAX1297ACEG+T implements a SAR architecture with an internal 3MHz full-power bandwidth track/hold stage and supports both internal and external clock modes via D6/D7 control bits. Its analog front-end allows software-selectable unipolar/bipolar operation and dynamic channel configuration through A2–A0 address bits.
Conversion timing is configurable: internal acquisition mode triggers conversion after ~1µs (internal clock) or three external clock cycles; external acquisition mode enables precise aperture control using two WR pulses. INT asserts low upon conversion completion and tri-states when CS goes high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 610µV step size with ±0.5 LSB INL over temperature. |
| Sampling Rate | 265ksps - supports real-time capture of signals up to 125kHz (Nyquist-limited) or higher via undersampling. |
| Analog Supply | +2.7V to +3.6V - compatible with standard 3V logic rails and Li-ion battery discharge profiles. |
| Reference | +2.5V internal bandgap - eliminates need for external reference; ±20ppm/°C TC ensures stability across 0°C to +70°C. |
| Power Consumption | 1.9mA at 265ksps - enables >100-hour runtime on 200mAh coin cell in intermittent-sampling systems. |
| Input Configuration | 2 single-ended or 1 pseudo-differential channel - reduces external multiplexer count in compact sensor interfaces. |
| Interface | Parallel 12-bit bidirectional bus - simplifies connection to legacy microcontrollers without SPI/I²C firmware overhead. |
Pinout & Package
MAX1297ACEG+T is housed in a 24-pin QSOP package (5.0mm × 7.5mm, 0.635mm pitch), optimized for space-constrained PCB layouts in portable instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0, CH1 | Analog Input Channels | Accept single-ended signals referenced to COM; support pseudo-differential measurement when paired as CH0/CH1. |
| COM | Analog Ground Reference | Sets zero-code voltage in single-ended mode; must remain stable to ±0.5 LSB during conversion. |
| REF, REFADJ | Reference Buffer I/O | REF outputs +2.5V internal reference (bypass with 4.7µF); REFADJ disables internal ref when tied to VDD. |
| VDD, GND | Analog Power Supply | +2.7V to +3.6V analog rail; requires local 0.1µF ceramic bypass to GND for noise immunity. |
| CS, WR, RD | Digital Control Inputs | Active-low chip select, write strobe, and read strobe - enable direct µP interfacing without glue logic. |
| INT | Interrupt Output | Open-drain signal pulled low when conversion completes and output data is valid; tri-states when CS = high. |
| D0–D11 | Parallel Data Bus | Three-state bidirectional lines - output 12-bit result in unipolar (binary) or bipolar (two's complement) format. |
| CLK | Clock Input/Mode Select | Accepts 100kHz–4.8MHz external clock; tied high/low to select internal clock mode (no external oscillator needed). |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input mode | Single-ended (2 channels) or pseudo-differential (1 channel) selection via SGL/DIF bit - eliminates hardware rework for sensor topology changes. |
| Two power-down modes | Standby (≤1µA) and full shutdown (≤2µA) - extends battery life in sleep-wake sensor nodes without sacrificing wake-up latency. |
| Internal track/hold with 3MHz BW | Supports accurate digitization of transients and RF carriers up to 3MHz - enables spectral analysis beyond Nyquist rate. |
| Low aperture jitter (50ps typ) | Minimizes sampling uncertainty in high-SNR applications like precision energy metering and medical waveform capture. |
| On-chip +2.5V reference | ±0.5 LSB linearity maintained without external reference IC - reduces BOM count and layout area by 2–3 components. |
Applications
| Industrial Control Systems | Data Logging |
|---|---|
Use Scenario: Monitoring temperature, pressure, and flow sensors in PLC I/O modules with limited board space and thermal budget. IC Role / Device Role / Timing Role: Primary ADC for analog sensor conditioning; handles 2-channel multiplexed inputs with <1µs acquisition time. Use Value: Internal reference and low 1.9mA active current reduce system power by 35% vs. discrete reference + external ADC solutions. |
Use Scenario: Battery-operated environmental sensor node logging temperature/humidity every 10 seconds for 6 months. IC Role / Device Role / Timing Role: Low-power data acquisition engine; enters full shutdown between samples, wakes in 2µs for burst conversion. Use Value: 2µA shutdown current enables multi-year operation on CR2032; parallel interface avoids SPI driver overhead in ultra-low-power MCU. |
| Energy Management | Patient Monitoring |
Use Scenario: Smart meter front-end measuring AC voltage/current with anti-alias filtering and harmonic analysis. IC Role / Device Role / Timing Role: High-fidelity sampling core; 3MHz T/H bandwidth supports undersampling of 50/60Hz fundamentals plus harmonics. Use Value: 67dB SINAD at 50kHz input ensures Class 0.5 metering accuracy; internal reference eliminates drift-induced calibration drift. |
Use Scenario: Portable ECG device acquiring lead-II differential signals with motion artifact rejection. IC Role / Device Role / Timing Role: Dual-channel ADC for simultaneous lead and reference path sampling; pseudo-differential mode rejects common-mode noise. Use Value: ±0.5 LSB INL and 76dB channel-to-channel crosstalk preserve diagnostic waveform fidelity at bedside. |
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+T | +5V supply range (+4.75V to +5.25V); identical pinout and feature set but incompatible with 3V systems. | Designed for legacy 5V industrial controllers; not suitable for battery-powered or mixed-voltage designs. | Select only if host µP and peripherals operate at 5V and require pin-compatible upgrade path. |
| ADS7822U | 2.7V–5.25V supply; SPI interface (not parallel); 10-bit resolution; 200ksps max; no internal reference. | Requires external reference and level-shifting for 3V µPs; lower resolution limits dynamic range in precision sensing. | Choose when board space is critical and µP lacks parallel port - but expect firmware redesign and SNR trade-off. |
Compared with MAX1297ACEG+T, MAX1296ACEG+T offers identical functionality at 5V but cannot replace it in 3V systems, while ADS7822U sacrifices resolution, parallel interface, and internal reference for smaller footprint and SPI compatibility - making MAX1297ACEG+T optimal for cost-sensitive, battery-powered 12-bit parallel ADC needs.
Availability
MAX1297ACEG+T is available at Aetrix Electronics and suitable for industrial control systems, portable medical devices, and energy metering applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX1297ACEG+T 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 and mixed-signal ICs for demanding industrial, medical, and communications applications.
The MAX1295/MAX1297 product line delivers low-power, high-accuracy ADCs with integrated references and flexible interfaces - engineered specifically for space- and power-constrained data acquisition in portable and embedded systems.
FAQ
What is the maximum sampling rate of the MAX1297ACEG+T?
The MAX1297ACEG+T achieves a maximum sampling rate of 265ksps under specified conditions: VDD = +2.7V to +3.6V, fCLK = 4.8MHz, and internal acquisition mode. At this rate, it draws 1.9mA and maintains ±0.5 LSB INL. Lower rates (e.g., 10ksps) reduce current to 400µA, enabling extended battery life in duty-cycled systems.
Does the MAX1297ACEG+T include an internal voltage reference?
Yes, the MAX1297ACEG+T integrates a precision +2.5V bandgap reference with ±0.5 LSB linearity and ±20ppm/°C temperature coefficient. The REF pin outputs this voltage (bypassed with 4.7µF to GND), and REFADJ can disable the internal reference when tied to VDD - allowing seamless transition to an external reference if higher accuracy or different voltage is required.
How many analog input channels does the MAX1297ACEG+T support?
The MAX1297ACEG+T supports two analog input channels (CH0 and CH1) in single-ended mode, or one pseudo-differential pair (CH0/CH1) where the difference |CH0 − CH1| is measured. This is distinct from the MAX1295 (6-channel), and channel selection is controlled via A2–A0 bits in the 8-bit control byte written to D7–D0.
What package type is used for the MAX1297ACEG+T?
The MAX1297ACEG+T is packaged in a 24-pin QSOP (Quarter-Size Outline Package) with 0.635mm lead pitch and 5.0mm × 7.5mm body dimensions. This surface-mount package provides robust thermal performance and is compatible with standard reflow soldering processes, making it suitable for high-volume automated assembly.
Can the MAX1297ACEG+T operate with a 3V supply?
Yes, the MAX1297ACEG+T is fully specified for operation from +2.7V to +3.6V analog supply (VDD), making it ideal for 3V systems including single-cell Li-ion, Li-polymer, and 3.3V regulated rails. At VDD = +3.0V, typical supply current is 1.9mA at 265ksps, and all DC and dynamic specifications - including ±0.5 LSB INL and 67dB SINAD - are guaranteed across the full temperature range.
MAX1297ACEG+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 265k
- 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:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 24-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1297ACEG+T FAQ
1.How can I place an order for MAX1297ACEG+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1297ACEG+T 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 MAX1297ACEG+T reliable?
The price and inventory of MAX1297ACEG+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1297ACEG+T is usually 5 days.
3.What payment methods are accepted for MAX1297ACEG+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1297ACEG+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1297ACEG+T?
MAX1297ACEG+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1297ACEG+T 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 MAX1297ACEG+T?
For technical support, including MAX1297ACEG+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1297ACEG+T requirements.
6.How does Aetrix verify that MAX1297ACEG+T is sourced from the original manufacturer or authorized distributors?
All MAX1297ACEG+T 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 MAX1297ACEG+T meets industry standards.
7.What is the process for return or replacement of MAX1297ACEG+T?
All MAX1297ACEG+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1297ACEG+T, 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 MAX1297ACEG+T part is unused and in its original packaging.
Return procedure for MAX1297ACEG+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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