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Analog Devices Inc./Maxim Integrated MAX1292ACEG+T
- Part No.:
- MAX1292ACEG+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1292ACEG+T.pdf
- Description:
- IC ADC 12BIT SAR 24QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,237
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Product details
Overview
MAX1292ACEG+T from Maxim Integrated is a 12-bit successive-approximation analog-to-digital converter (ADC) with integrated +2.5V reference, byte-wide parallel (8+4) interface, and software-configurable 4-channel single-ended or 2-channel pseudo-differential analog input. 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+T datasheet, MAX1292ACEG+T pinout, MAX1292ACEG+T application, or MAX1292ACEG+T equivalent, key selection criteria include its 400ksps sampling rate, ±0.5 LSB INL, 2.5mA active current at full speed, 2µs wake-up from shutdown, and QSOP-24 package compatibility with space-constrained industrial sensor nodes and battery-powered medical monitors.
Technical Context
The MAX1292ACEG+T implements a charge-redistribution SAR architecture with an internal track-and-hold stage offering 6MHz full-power bandwidth and 350kHz full-linear bandwidth. Its control byte (D7–D0) configures acquisition mode (internal/external), unipolar/bipolar range, single-ended/pseudo-differential input, and channel selection - all without external timing components.
It features dual power-down modes: standby (≤10µA) and full shutdown (≤2µA), triggered by software control bits PD0/PD1. The parallel interface uses HBEN to multiplex 12-bit results across an 8-bit data bus, while INT provides conversion-complete interrupt signaling synchronized to WR/CS timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 1 part in 4096 quantization granularity for precision sensor digitization. |
| Sampling Rate | 400ksps - supports real-time capture of signals up to 200kHz Nyquist bandwidth. |
| INL / DNL | ±0.5 LSB / ±1 LSB - ensures monotonicity and <0.012% end-point linearity error over temperature. |
| Reference | +2.5V internal - eliminates need for external reference IC; TCREF = ±2ppm/°C ensures stable scaling. |
| Supply Current | 2.5mA at 400ksps - enables continuous high-speed operation within 10mW total power budget. |
| Wake-up Time | 2µs - allows rapid reactivation from shutdown for burst-mode sensing with minimal latency penalty. |
| Analog Inputs | 4 single-ended or 2 pseudo-differential channels - reduces external MUX count in multi-sensor systems. |
| Package | 24-pin QSOP - 3.9mm × 8.7mm footprint compatible with standard SMT assembly and IPC-7351B land patterns. |
Pinout & Package
MAX1292ACEG+T is housed in a 24-pin QSOP (Quad Small Outline Package) with 0.65mm lead pitch and exposed pad not present. Pin functions are electrically validated per Maxim's MAX1292 datasheet Rev 3 (12/02), Figure 3b and Pin Description table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 HBEN | High-Byte Enable | Selects MSB (D8–D11) or LSB (D0–D7) output on shared 8-bit bus; enables compact microcontroller interface. |
| 2–5 D7–D4 | Digital Output (Three-State) | Lower byte of 12-bit result; tri-stated when CS high or RD inactive - prevents bus contention. |
| 6–9 D3/D11–D0/D8 | Multiplexed Data I/O | Shared pins delivering upper nibble (HBEN=1) or lower byte (HBEN=0); requires no external latch. |
| 10 INT | Interrupt Output | Active-low open-drain signal indicating conversion completion and data validity for µP polling/interrupt service. |
| 11 RD | Read Strobe Input | Falling edge latches 8-bit data onto bus; synchronizes read access with internal conversion state machine. |
| 12 WR | Write Strobe Input | Rising edge loads control byte and initiates acquisition/conversion; timing-critical for external acquisition mode. |
| 13 CLK | Clock Input/Output | Accepts external 100kHz–7.6MHz clock or floats to VDD/GND to enable internal 6MHz oscillator. |
| 14 CS | Chip Select | Active-low enable; places INT and D0–D7 in high-impedance state when deasserted - supports multi-device buses. |
| 15–18 CH3–CH0 | Analog Input Channels | Single-ended inputs referenced to COM; support 0V to VREF (unipolar) or ±VREF/2 (bipolar) ranges. |
| 19 COM | Analog Common Reference | Zero-code reference point; must remain stable to ±0.5 LSB during conversion - requires low-noise grounding. |
| 20 GND | Analog & Digital Ground | Common return for analog and digital sections; star-grounding recommended to minimize noise coupling. |
| 21 REFADJ | Reference Adjust/Bypass | Connect to VDD to disable internal bandgap; bypass with 0.01µF capacitor when using external reference. |
| 22 REF | Reference Output/Input | Supplies +2.5V internal reference; requires 4.7µF capacitor to GND for stability and low-noise operation. |
| 23 VDD | +5V Analog Supply | Primary power for analog core and T/H stage; bypass with 0.1µF ceramic capacitor close to pin. |
| 24 VLOGIC | +2.7V to +5.5V Digital Supply | Independent voltage for digital I/O drivers - enables interfacing with 3.3V or 5V µPs without level shifters. |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input topology | Runtime selection of 4-channel single-ended or 2-channel pseudo-differential mode via control byte - eliminates hardware reconfiguration. |
| Integrated +2.5V reference | ±2ppm/°C tempco and ±100mV adjust range (REFADJ) - maintains accuracy across -40°C to +85°C without external components. |
| Byte-wide parallel interface | 12-bit result delivered over 8-pin bus using HBEN multiplexing - reduces PCB trace count and simplifies µP connection. |
| Two-tier power-down | Standby (≤10µA) and full shutdown (≤2µA) modes controlled by PD0/PD1 bits - extends battery life in intermittent-sampling applications. |
| Internal/external clock flexibility | On-chip 6MHz oscillator (CLK tied to VDD/GND) or external clock support (100kHz–7.6MHz) - balances µP resource usage vs. timing precision. |
| Fast 2µs wake-up | Resumes full-speed 400ksps operation within 2µs of exit from shutdown - enables responsive event-triggered sampling. |
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 digitizing 4 analog sensor outputs with simultaneous bipolar/unipolar support and internal reference stability. Use Value: Eliminates external reference and level-shifting circuitry while maintaining ±0.5 LSB linearity across operating temperature - reducing BOM cost and calibration effort. |
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and light intensity at 100Hz intervals over weeks. IC Role / Device Role / Timing Role: Low-power ADC managing duty-cycled sampling, entering full shutdown between readings to conserve energy. Use Value: 2µA shutdown current and 2µs wake-up enable microsecond-precision burst sampling - extending coin-cell battery life beyond 12 months. |
| Energy Management | Patient Monitoring |
|
Use Scenario: Smart meter front-end measuring AC voltage/current waveforms with harmonic analysis capability. IC Role / Device Role / Timing Role: High-fidelity digitizer capturing 400ksps samples for FFT-based power quality metrics (THD, SFDR > 80dB). Use Value: 6MHz full-power bandwidth and 70dB SINAD support undersampling of 50/60Hz fundamentals with accurate harmonic reconstruction. |
Use Scenario: Portable ECG device acquiring biopotential signals from 4 limb leads with DC-coupled front-end. IC Role / Device Role / Timing Role: Bipolar-mode ADC converting ±1.25V differential inputs with COM-referenced zero point for baseline stability. Use Value: ±0.5 LSB INL and 2.5mA active current enable clinical-grade waveform fidelity while meeting IEC 60601 leakage current limits. |
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 |
|---|---|---|---|
| MAX1293ACEG+ | +3V-only operation (VDD/VLOGIC = 2.7V–3.6V); identical pinout and feature set but lower supply voltage range. | Suitable for 3.3V-only systems; not interoperable with +5V analog domains without level translation. | Select MAX1293ACEG+ when system uses 3.3V rails exclusively and requires identical functionality in smaller voltage envelope. |
| ADS7822U | 8-bit resolution, SPI interface, 200ksps max rate; no internal reference - requires external 2.5V reference and serial interface logic. | Targeted at cost-sensitive, lower-precision applications where serial interface and smaller package are prioritized. | Choose ADS7822U only if 8-bit resolution suffices and SPI bus availability justifies added interface complexity and external reference cost. |
Compared with MAX1292ACEG+T, MAX1293ACEG+ offers identical functionality at 3.3V but lacks +5V analog compatibility, while ADS7822U trades resolution, parallel simplicity, and integrated reference for lower cost and SPI flexibility - making MAX1292ACEG+T optimal for 5V mixed-signal systems demanding 12-bit precision and minimal external components.
Availability
MAX1292ACEG+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 guaranteed traceable sourcing.
Supply support for MAX1292ACEG+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, mixed-signal, and power-management ICs for demanding industrial, medical, and communications applications.
The MAX1290/MAX1292 family delivers low-power, high-accuracy ADCs with integrated references and flexible interfaces - engineered specifically for battery-operated data loggers, portable instrumentation, and space-constrained sensor interfaces.
FAQ
What is the operating temperature range for MAX1292ACEG+T?
The MAX1292ACEG+T is specified for commercial temperature operation from 0°C to +70°C, as confirmed by its ordering code suffix 'C' and the 'MAX1292_C__' designation in the Absolute Maximum Ratings table. This range aligns with standard industrial ambient conditions and supports use in non-extended-environment equipment enclosures without active thermal management.
Does MAX1292ACEG+T require an external clock to operate?
No, MAX1292ACEG+T does not require an external clock. It includes an internal 6MHz oscillator; connecting the CLK pin to VDD or GND enables internal clock mode. External clock operation (100kHz–7.6MHz) is optional and selected via control byte bits D6/D7 - providing design flexibility for timing-critical or µP-resource-constrained systems.
How many analog input channels does MAX1292ACEG+T support in single-ended mode?
MAX1292ACEG+T supports four single-ended analog input channels (CH0–CH3), as explicitly stated in the General Description and verified in Figure 3b (MAX1292 Simplified Input Structure). This is distinct from the MAX1290 variant, which provides eight single-ended channels - confirming the channel count is fixed per part number and not software-configurable beyond the 4-channel limit.
What is the purpose of the HBEN pin on MAX1292ACEG+T?
The HBEN (High Byte Enable) pin on MAX1292ACEG+T controls multiplexing of the 12-bit conversion result onto the 8-bit data bus: when HBEN = 1, D0–D7 carry D8–D11 (upper nibble); when HBEN = 0, D0–D7 carry D0–D7 (lower byte). This enables full 12-bit readout using only 8 data lines - reducing microcontroller pin count and PCB routing complexity without external latches.
Can MAX1292ACEG+T operate with a 3.3V digital supply while using a +5V analog supply?
Yes, MAX1292ACEG+T supports independent analog and digital supplies: VDD = +5V (analog core) and VLOGIC = +2.7V to +5.5V (digital I/O). With VLOGIC = 3.3V, the device drives D0–D7 and INT to valid 3.3V logic levels while maintaining full 12-bit performance and +5V analog input range - enabling seamless integration with 3.3V microcontrollers in mixed-voltage systems.
MAX1292ACEG+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):
- 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+T FAQ
1.How can I place an order for MAX1292ACEG+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1292ACEG+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 MAX1292ACEG+T reliable?
The price and inventory of MAX1292ACEG+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1292ACEG+T is usually 5 days.
3.What payment methods are accepted for MAX1292ACEG+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1292ACEG+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1292ACEG+T?
MAX1292ACEG+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1292ACEG+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 MAX1292ACEG+T?
For technical support, including MAX1292ACEG+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1292ACEG+T requirements.
6.How does Aetrix verify that MAX1292ACEG+T is sourced from the original manufacturer or authorized distributors?
All MAX1292ACEG+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 MAX1292ACEG+T meets industry standards.
7.What is the process for return or replacement of MAX1292ACEG+T?
All MAX1292ACEG+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1292ACEG+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 MAX1292ACEG+T part is unused and in its original packaging.
Return procedure for MAX1292ACEG+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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