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Analog Devices Inc./Maxim Integrated MAX1292ACEG+
- Part No.:
- MAX1292ACEG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1292ACEG+.pdf
- Description:
- IC ADC 12BIT 400KSPS 24-QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,050
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Product details
Overview
MAX1292ACEG+ 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 MAX1292ACEG+ datasheet, MAX1292ACEG+ pinout, MAX1292ACEG+ application, or MAX1292ACEG+ equivalent, this device is selected for low-power, space-constrained embedded measurement where precise timing control, software-configurable unipolar/bipolar input ranges, and sub-2µs wake-up from shutdown are required.
Technical Context
The MAX1292ACEG+ 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 (0 to +2.5V) or bipolar (±1.25V) operation and configurable input multiplexing across four single-ended channels or two pseudo-differential pairs.
Conversion timing is deterministic: 13 clock cycles per conversion, with aperture jitter <200ps (internal clock) or <50ps (external clock). The device features automatic power-down between conversions, reducing supply current to 2µA in shutdown mode while maintaining fast 2µs wake-up - critical for battery-powered sensing nodes requiring duty-cycled operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = 610µV full-scale step size with ±0.5 LSB INL over temperature. |
| Sampling Rate | 400ksps max - supports real-time capture of signals up to 350kHz full-linear bandwidth without aliasing. |
| 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 tempco ensures stable scaling across 0°C to +70°C. |
| Power Consumption | 2.5mA at 400ksps, 2µA in shutdown - enables >1-year battery life in intermittent-sampling applications. |
| Digital Interface | Byte-wide parallel (D0–D7 + D8–D11 multiplexed via HBEN) - simplifies connection to 8-bit µPs with minimal glue logic. |
| Supply Flexibility | VDD = +5V ±10%, VLOGIC = +2.7V to +5.5V - permits coexistence with 3.3V or 5V logic domains without level shifters. |
Pinout & Package
MAX1292ACEG+ is housed in a 24-pin QSOP package (5.0mm × 7.5mm, 0.635mm pitch), optimized for high-density PCB layouts in portable instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH3 | Analog input channels | Four single-ended inputs; in pseudo-differential mode, paired as CH0/CH1 and CH2/CH3 - requires COM-stable reference for ±0.5 LSB accuracy. |
| COM | Analog ground reference | Sets zero-code voltage in single-ended mode; must remain stable within ±0.5 LSB during conversion - bypass with 0.1µF to GND. |
| REF / REFADJ | Internal reference output / adjustment | REF outputs +2.5V; REFADJ connects to VDD to disable internal ref when using external reference - bypass REF with 4.7µF capacitor. |
| VDD / VLOGIC | Analog / digital supply rails | VDD powers analog core (+5V); VLOGIC powers digital I/O (+2.7V to +5.5V) - independent rails prevent digital noise coupling into analog path. |
| CS / WR / RD / INT / HBEN | Parallel interface control | Active-low chip select (CS) tri-states outputs; WR initiates acquisition/conversion; RD reads data; INT flags completion; HBEN selects MSB/LSB byte on D0–D7 bus. |
| D0–D7 / D8–D11 | Data bus (multiplexed) | 8-bit bidirectional data lines; HBEN = 1 enables D8–D11 on D0–D3, allowing 12-bit read in two cycles - avoids need for 12-bit wide bus. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input mode | Single-ended or pseudo-differential via SGL/DIF bit; unipolar/bipolar range selection via UNI/BIP bit - eliminates hardware rework for sensor signal polarity changes. |
| Two-stage power-down | Standby (10µA) and full shutdown (2µA) modes controlled by PD0/PD1 bits - enables adaptive power management synchronized with system sleep states. |
| Internal track-and-hold | 6MHz full-power bandwidth with 3.2µs acquisition time - captures transients without external T/H circuitry, reducing BOM and layout complexity. |
| Flexible clocking | Internal 7.6MHz oscillator or external clock (100kHz–7.6MHz) selectable via D6/D7 - relieves µP from clock generation while preserving timing precision. |
| Input protection | Clamp diodes allow analog inputs to swing from (GND − 300mV) to (VDD + 300mV) - protects against ESD and overvoltage during sensor hot-plug or fault conditions. |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
Use Scenario: Continuous logging of temperature, pressure, and flow sensor outputs in PLC-based control cabinets with limited thermal headroom. IC Role / Device Role / Timing Role: ADC front-end digitizing 4 analog sensor channels at 10ksps per channel with programmable bipolar range for differential bridge sensors. Use Value: 2.5mA active current and 2µA shutdown enable fanless enclosure design; internal +2.5V reference eliminates calibration drift vs. external references. |
Use Scenario: Portable ECG and SpO₂ monitor acquiring biopotential signals from dry electrodes with low-noise, low-power requirements. IC Role / Device Role / Timing Role: 12-bit digitizer for analog front-end amplifiers, operating in pseudo-differential mode to reject common-mode interference from body coupling. Use Value: ±0.5 LSB INL and 70dB SINAD ensure clinical-grade waveform fidelity; 2µs wake-up supports burst-sampling to extend coin-cell battery life beyond 72 hours. |
| Energy Metering Subsystem | Touchscreen Controller Interface |
Use Scenario: Residential smart meter measuring voltage/current waveforms across multiple phases using isolated sigma-delta ADCs with auxiliary monitoring channels. IC Role / Device Role / Timing Role: Auxiliary ADC capturing auxiliary parameters (temperature, tamper switch status, supply rail monitors) with software-triggered conversions. Use Value: Parallel interface enables deterministic read timing without SPI overhead; VLOGIC support for +3.3V logic simplifies integration with energy-meter SoCs. |
Use Scenario: Resistive touchscreen controller in handheld HMI requiring fast coordinate sampling during finger contact with minimal latency. IC Role / Device Role / Timing Role: High-speed digitizer for X/Y electrode voltages, configured in single-ended mode with 400ksps sampling to resolve touch position within 2.5ms. Use Value: 400ksps rate and 3.2µs acquisition time allow sub-5ms full-screen scan; internal T/H removes need for external sample-hold, saving board area. |
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, SPI interface, no internal reference, 200ksps max - smaller resolution, serial interface, higher speed per channel but no parallel bus. | Best suited for µC designs with limited GPIO but sufficient SPI bandwidth; lacks built-in reference and multi-channel MUX. | Select if board space is constrained and µP has dedicated SPI; avoid if parallel interface or internal reference is required. |
| MAX11602EEE+ | 12-bit, I²C interface, internal reference, 100ksps, 8-channel - same resolution and reference, but slower and serial-only. | Ideal for low-pin-count microcontrollers lacking parallel bus; supports daisy-chaining but adds protocol overhead. | Choose for simplified routing and firmware integration in low-channel-count systems; not suitable for high-throughput or interrupt-driven polling. |
Compared with ADS7822U and MAX11602EEE+, the MAX1292ACEG+ provides deterministic parallel read timing, integrated 4-channel MUX, and guaranteed 400ksps throughput - making it optimal for µP-based data loggers needing minimal firmware latency and no external reference components.
Availability
MAX1292ACEG+ 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 and long-term production continuity.
Supply support for MAX1292ACEG+ 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 precision 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 functionality (reference, T/H, MUX), flexible supply operation, and rapid wake-up to minimize system-level power budget.
FAQ
What is the operating temperature range for MAX1292ACEG+?
The MAX1292ACEG+ is rated for 0°C to +70°C ambient operation, as indicated by the 'C' grade suffix in its ordering code. This commercial-grade temperature range is validated across all electrical specifications including INL (±0.5 LSB), gain error (±4 LSB), and reference stability (±2ppm/°C), ensuring consistent performance in indoor industrial and medical equipment environments.
Does MAX1292ACEG+ require an external crystal or clock source?
No - the MAX1292ACEG+ includes an internal 7.6MHz oscillator usable in internal clock mode (D7=1, D6=0). External clock operation (100kHz–7.6MHz) is optional and selected via control bits D6/D7; CLK pin must be tied to VDD or GND in internal clock mode to prevent floating.
How does the HBEN pin function in MAX1292ACEG+ data transfers?
The HBEN (High Byte Enable) pin controls multiplexing of the 12-bit result onto the 8-bit data bus: when HBEN = 1, D0–D3 carry D8–D11 (MSB nibble); when HBEN = 0, D0–D7 carry D0–D7 (LSB byte). Two consecutive RD cycles - first with HBEN=1, then HBEN=0 - retrieve the full 12-bit word without requiring a 12-bit bus.
Can MAX1292ACEG+ operate with a 3.3V digital supply?
Yes - the VLOGIC pin accepts +2.7V to +5.5V, fully supporting 3.3V logic interfaces. Digital outputs (D0–D7, INT) are level-shifted to VLOGIC, and input thresholds (VIH/VIL) scale accordingly, enabling direct connection to 3.3V µPs without level-shifting circuitry while maintaining full 400ksps throughput.
What is the minimum acquisition time required before conversion starts in MAX1292ACEG+?
The MAX1292ACEG+ specifies a maximum acquisition time (tACQ) of 3.2µs under typical conditions (RS < 3kΩ). This value is fixed by internal timing in internal acquisition mode; in external acquisition mode, the user controls acquisition duration via WR pulse timing, but must allow ≥3.2µs for full settling when driving from high-impedance sources.
MAX1292ACEG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- -
MAX1292ACEG+ FAQ
1.How can I place an order for MAX1292ACEG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1292ACEG+ 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 MAX1292ACEG+ reliable?
The price and inventory of MAX1292ACEG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1292ACEG+ is usually 5 days.
3.What payment methods are accepted for MAX1292ACEG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1292ACEG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1292ACEG+?
MAX1292ACEG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1292ACEG+ 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 MAX1292ACEG+?
For technical support, including MAX1292ACEG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1292ACEG+ requirements.
6.How does Aetrix verify that MAX1292ACEG+ is sourced from the original manufacturer or authorized distributors?
All MAX1292ACEG+ 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 MAX1292ACEG+ meets industry standards.
7.What is the process for return or replacement of MAX1292ACEG+?
All MAX1292ACEG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1292ACEG+, 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 MAX1292ACEG+ part is unused and in its original packaging.
Return procedure for MAX1292ACEG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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