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Analog Devices Inc./Maxim Integrated MAX1292AEEG+
- Part No.:
- MAX1292AEEG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1292AEEG+.pdf
- Description:
- IC ADC 12BIT SAR 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,681
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Product details
Overview
MAX1292AEEG+ from Maxim Integrated is a 12-bit successive-approximation analog-to-digital converter (ADC) with integrated +2.5V reference, software-configurable 4-channel single-ended or 2-channel pseudo-differential input, and byte-wide parallel (8+4) interface. 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 MAX1292AEEG+ datasheet, MAX1292AEEG+ pinout, MAX1292AEEG+ application, or MAX1292AEEG+ equivalent, this page delivers verified specifications, validated pin functions, confirmed operating modes (unipolar/bipolar, internal/external clock/acquisition), real-world timing constraints (400ksps max, 3.2µs conversion time), and precise thermal performance (–40°C to +85°C).
Technical Context
The MAX1292AEEG+ implements a capacitive charge-redistribution SAR architecture with an on-chip track-and-hold stage offering 6MHz full-power bandwidth and 350kHz full-linear bandwidth. Its internal 6MHz clock generator eliminates external timing components in internal-clock mode, while external-clock mode supports 100kHz–7.6MHz with 30%–70% duty cycle.
Conversion control is managed through an 8-bit software-configurable control byte that selects channel (A2–A0), input mode (SGL/DIF), polarity (UNI/BIP), acquisition method (ACQMOD), and power-down state (PD1/PD0). The HBEN pin enables high-byte/low-byte multiplexing of the 12-bit result across the 8-bit data bus, reducing I/O count without sacrificing resolution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 LSB = ±0.5mV at 2.5V reference for precision sensor digitization |
| Max Sampling Rate | 400ksps - supports real-time monitoring of fast transients in industrial control loops |
| INL / DNL | ±0.5 LSB / ±1 LSB - ensures monotonicity and <0.012% linearity error over temperature |
| Reference | +2.5V internal - eliminates external reference component, reduces BOM count and layout area |
| Power Consumption | 2.5mA at 400ksps, 2µA in shutdown - enables battery operation for >1 year in low-duty-cycle logging |
| Analog Input Config | 4 single-ended or 2 pseudo-differential channels - matches typical multi-sensor front-end topologies |
| Operating Temp | –40°C to +85°C - qualified for industrial and medical environments without derating |
Pinout & Package
MAX1292AEEG+ is housed in a 24-pin QSOP package (5.0mm × 7.5mm, 0.635mm pitch), optimized for space-constrained PCB layouts in portable instrumentation and embedded controllers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH3 | Analog input channels | Accept single-ended signals referenced to COM; support pseudo-differential pairs CH0/CH1 and CH2/CH3 |
| 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 output / adjustment | REF outputs +2.5V; REFADJ tied to VDD disables internal reference for external reference use |
| VDD / VLOGIC | Analog / digital supply rails | VDD = +5V ±10%; VLOGIC = +2.7V to +5.5V - enables interoperability with 3.3V or 5V logic domains |
| CS / WR / RD / INT / HBEN | Parallel interface controls | CS enables chip select; WR initiates acquisition/conversion; RD reads data; INT flags completion; HBEN toggles MSB/LSB byte access |
| D0/D8–D7 | Tri-state bidirectional data bus | 8-bit bus carries LSBs (HBEN=0) or MSBs (HBEN=1); supports standard µP bus timing with tDS/tDH ≤40ns |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input topology | Selects 4-channel single-ended or 2-channel pseudo-differential mode via control byte - eliminates hardware rework for sensor interface changes |
| Unipolar/bipolar input support | Configured by UNI/BIP bit - enables seamless measurement of both 0–2.5V sensor outputs and ±1.25V differential signals |
| Two-tier power-down | Standby (1.0mA @ 100ksps) and full shutdown (2µA) - extends battery life in intermittent-sampling applications like energy meters |
| Internal track-and-hold | 6MHz full-power bandwidth - captures fast-rising pulses without external sample-hold circuitry |
| Byte-multiplexed 12-bit output | HBEN pin toggles D0–D7 between LSB and MSB bytes - preserves 8-bit µP compatibility without requiring 12-bit bus width |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
Use Scenario: Continuous sampling of pressure, temperature, and flow sensors in PLC-based control cabinets. IC Role / Device Role / Timing Role: ADC front-end digitizing 4 analog sensor outputs with simultaneous channel sequencing and interrupt-driven data transfer. Use Value: 12-bit resolution and ±0.5 LSB INL ensure accurate calibration traceability; –40°C to +85°C rating guarantees reliability in unconditioned factory environments. |
Use Scenario: Portable ECG and SpO₂ monitors acquiring biopotential signals with low-noise, low-power requirements. IC Role / Device Role / Timing Role: Precision digitizer for differential electrode inputs using pseudo-differential mode with COM-referenced common-mode rejection. Use Value: Internal +2.5V reference eliminates drift-prone external components; 2µA shutdown current enables multi-week battery life in standby. |
| Energy Meter Data Logging | Touchscreen Controller Interface |
Use Scenario: Residential smart meters capturing voltage/current waveforms for harmonic analysis and kWh calculation. IC Role / Device Role / Timing Role: High-speed ADC sampling AC mains at 400ksps with undersampling capability enabled by 6MHz T/H bandwidth. Use Value: Full-linear 350kHz bandwidth supports accurate THD measurement up to 175kHz; internal clock simplifies timing design versus external oscillator dependency. |
Use Scenario: Resistive touchscreen digitizers converting X/Y coordinate voltages in handheld HMI panels. IC Role / Device Role / Timing Role: Low-latency ADC scanning four analog channels (X+, X−, Y+, Y−) in rapid sequence with software-triggered conversions. Use Value: 400ns aperture delay and <50ps aperture jitter preserve coordinate accuracy; VLOGIC flexibility allows direct connection to 3.3V touchscreen controller ASICs. |
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 |
|---|---|---|---|
| MAX1292BEEG+ | Same package and pinout; ±1 LSB INL (vs. ±0.5 LSB for MAX1292AEEG+) | Acceptable for cost-sensitive industrial logging where <0.025% linearity is sufficient | Select MAX1292BEEG+ when ±1 LSB INL meets system accuracy budget and lower cost is prioritized |
| ADS7822U | 8-bit resolution, SPI interface, no internal reference - requires external REF and level-shifting for 5V systems | Better suited for low-resolution, low-pin-count designs with existing SPI infrastructure | Choose ADS7822U only if 8-bit resolution suffices and board space permits added reference/level-shift components |
Compared with MAX1292BEEG+, the MAX1292AEEG+ provides tighter linearity for metrology-grade measurements; compared with ADS7822U, it delivers higher resolution, integrated reference, and parallel interface - reducing component count and firmware overhead in µP-based data loggers.
Availability
MAX1292AEEG+ is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, and energy meter data logging requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1292AEEG+ 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 MAX1290/MAX1292 family was engineered to deliver high-resolution, low-power ADC functionality in compact QSOP packages for space- and power-constrained embedded systems requiring minimal external components.
FAQ
What is the maximum sampling rate supported by the MAX1292AEEG+?
The MAX1292AEEG+ achieves a maximum sampling rate of 400ksps under specified conditions: VDD = VLOGIC = +5V ±10%, fCLK = 7.6MHz, and internal acquisition mode. At this rate, total supply current is 2.5mA, and conversion time is 3.2µs. Performance remains stable across the full –40°C to +85°C operating range, making MAX1292AEEG+ suitable for real-time industrial sensing applications.
Does the MAX1292AEEG+ require an external reference voltage?
No, the MAX1292AEEG+ integrates a precision +2.5V bandgap reference with ±2ppm/°C temperature coefficient and 2.49V to 2.51V output tolerance. An external 4.7µF capacitor at the REF pin is required for stability. The internal reference can be disabled by connecting REFADJ to VDD, allowing use of an external reference - but MAX1292AEEG+ operates fully functional without any external reference component.
How does the HBEN pin function in the MAX1292AEEG+?
The HBEN (High Byte Enable) pin on the MAX1292AEEG+ controls multiplexing of the 12-bit conversion result onto the 8-bit data bus: when HBEN = 1, D0–D7 carry bits D8–D11 (MSB byte); when HBEN = 0, D0–D7 carry bits D0–D7 (LSB byte). This allows standard 8-bit microprocessors to read the full 12-bit result in two consecutive cycles without requiring wider bus traces or additional I/O pins.
Can the MAX1292AEEG+ operate with a 3.3V digital supply?
Yes, the MAX1292AEEG+ supports VLOGIC from +2.7V to +5.5V, enabling direct interface with 3.3V microcontrollers without level shifters. Digital outputs (D0–D7, INT) are rail-to-rail relative to VLOGIC, and input thresholds (VIH/VIL) scale accordingly. The analog section remains powered from VDD = +5V, preserving SNR and dynamic range while simplifying mixed-voltage system integration.
What are the power-down modes available on the MAX1292AEEG+?
The MAX1292AEEG+ offers two software-selectable power-down modes controlled by PD1/PD0 bits in the configuration byte: Standby mode draws 1.0mA at 100ksps and retains register state; Full shutdown draws just 2µA and powers down the reference and analog core. Both modes wake in ≤2µs, allowing rapid resumption of sampling - ideal for burst-mode data acquisition in battery-powered MAX1292AEEG+ deployments.
MAX1292AEEG+ 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1292AEEG+ FAQ
1.How can I place an order for MAX1292AEEG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1292AEEG+ 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 MAX1292AEEG+ reliable?
The price and inventory of MAX1292AEEG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1292AEEG+ is usually 5 days.
3.What payment methods are accepted for MAX1292AEEG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1292AEEG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1292AEEG+?
MAX1292AEEG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1292AEEG+ 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 MAX1292AEEG+?
For technical support, including MAX1292AEEG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1292AEEG+ requirements.
6.How does Aetrix verify that MAX1292AEEG+ is sourced from the original manufacturer or authorized distributors?
All MAX1292AEEG+ 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 MAX1292AEEG+ meets industry standards.
7.What is the process for return or replacement of MAX1292AEEG+?
All MAX1292AEEG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1292AEEG+, 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 MAX1292AEEG+ part is unused and in its original packaging.
Return procedure for MAX1292AEEG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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