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Analog Devices Inc./Maxim Integrated MAX1090ACEI+
- Part No.:
- MAX1090ACEI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- -
- Datasheet:
-
MAX1090ACEI+.pdf
- Description:
- IC ADC 10BIT 400KSPS 28-QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,715
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Product details
Overview
The MAX1090ACEI+ from Maxim Integrated is a 10-bit successive-approximation analog-to-digital converter (ADC) with integrated +2.5V reference, byte-wide parallel (8+2) interface, and software-configurable 8-channel single-ended or 4-channel pseudo-differential input multiplexer. 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 microprocessors in portable data-acquisition systems.
For engineers reviewing the MAX1090ACEI+ datasheet, MAX1090ACEI+ pinout, MAX1090ACEI+ application, or MAX1090ACEI+ equivalent, key selection considerations include its 400ksps sampling rate, ±0.5 LSB integral nonlinearity, 2.5mA active current at full speed, 2µs wake-up from shutdown, and QSOP-28 package compatibility with industrial sensor front-ends and battery-powered medical monitors.
Technical Context
The MAX1090ACEI+ 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 topology, 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 device tri-states INT on CS high and supports high-byte enable (HBEN) for 10-bit result multiplexing across D7–D0/D9–D8, ensuring compatibility with 8-bit data buses while preserving full resolution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR ADC with no missing codes over temperature |
| Sampling Rate | Up to 400ksps - supports real-time monitoring of fast transients in energy metering |
| INL / DNL | ±0.5 LSB / ±1 LSB - ensures accurate linearity for precision sensor digitization |
| Reference | +2.5V internal bandgap reference (±20ppm/°C TC, 2.49V–2.51V output) |
| Power Consumption | 2.5mA at 400ksps; 2µA in full shutdown - enables multi-year battery life in remote loggers |
| Analog Inputs | 8 single-ended or 4 pseudo-differential channels - simplifies multi-sensor interfacing without external MUX |
| Interface | Byte-wide parallel (D7–D0 + D9/D8 via HBEN) with active-low CS, WR, RD, and INT - direct µP connection without glue logic |
Pinout & Package
MAX1090ACEI+ is housed in a 28-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch), optimized for space-constrained PCB layouts in portable instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 HBEN | High-Byte Enable | Selects whether D7–D0 carry LSBs (HBEN=0) or MSBs (HBEN=1); enables 10-bit readout on 8-bit bus |
| 10 INT | Interrupt Output | Active-low signal indicating conversion completion and data validity; tri-stated when CS is high |
| 11 RD | Read Strobe | Falling edge latches conversion result onto D7–D0/D9–D8; requires CS low to activate |
| 12 WR | Write Strobe | Rising edge loads control byte (channel, mode, power-down) and initiates acquisition/conversion sequence |
| 13 CLK | Clock Input | Accepts external 100kHz–7.6MHz clock; tied to VDD/GND for internal clock mode |
| 14 CS | Chip Select | Active-low enable; places INT, D7–D0, D9–D8 in high-impedance state when deasserted |
| 15–22 CH0–CH7 | Analog Input Channels | Eight single-ended inputs; in pseudo-differential mode, paired as CH0/CH1, CH2/CH3, etc. |
| 23 COM | Common Reference | Zero-code reference for single-ended mode; must remain stable to ±0.5 LSB during conversion |
| 25 REFADJ | Reference Adjust | Bypass to GND with 0.01µF cap; connect to VDD to disable internal reference when using external REF |
| 26 REF | Reference I/O | Internal +2.5V output or external reference input; requires 4.7µF bypass cap for internal use |
| 27 VDD | Analog Supply | +5V ±10% analog power; bypass to GND with 0.1µF ceramic capacitor |
| 28 VLOGIC | Digital Supply | +2.7V to +5.5V logic supply - decouples digital I/O voltage from analog rail for noise isolation |
Key Features
| Feature | Design Value |
|---|---|
| Software-configurable input topology | Single-ended (8 ch) or pseudo-differential (4 ch) operation selected via control byte - eliminates external switch ICs |
| Integrated +2.5V reference | 2.49V–2.51V output with ±20ppm/°C drift - removes need for external precision reference in cost-sensitive designs |
| Two-tier power-down | Standby (≤10µA) and full shutdown (≤2µA) modes - extends battery life in intermittent-sampling applications |
| Fast wake-up | 2µs transition from shutdown to first valid conversion - supports burst-mode sensing in IoT endpoints |
| Flexible logic interface | VLOGIC pin supports +2.7V to +5.5V digital I/O - enables direct connection to 3.3V or 5V µPs without level shifters |
Applications
| Industrial Control Systems | Data-Acquisition Systems |
|---|---|
Use Scenario: Monitoring temperature, pressure, and flow sensors in PLC analog input modules. IC Role / Device Role / Timing Role: 10-bit ADC digitizing 8 sensor signals with programmable unipolar/bipolar range and internal reference stability. Use Value: Eliminates external reference and multiplexer, reducing BOM count and layout area in DIN-rail mounted controllers. |
Use Scenario: Portable field data loggers capturing environmental parameters (voltage, current, humidity) over extended periods. IC Role / Device Role / Timing Role: Low-power ADC with 2µA shutdown current and 2µs wake-up, synchronized to sensor polling intervals. Use Value: Enables >5-year battery life using coin cells while maintaining 400ksps burst capability for transient capture. |
| Energy Management | Patient Monitoring |
Use Scenario: Smart meter front-end measuring AC voltage/current waveforms for harmonic analysis and kWh calculation. IC Role / Device Role / Timing Role: 10-bit ADC with 6MHz full-power bandwidth supporting undersampling of 50/60Hz fundamentals and harmonics up to 3kHz. Use Value: Delivers SINAD >60dB at 50kHz input - sufficient for Class 0.5 metering accuracy without oversampling DSP. |
Use Scenario: Battery-powered ECG/SpO₂ monitor digitizing biopotential signals with low noise and minimal power draw. IC Role / Device Role / Timing Role: ADC with ±0.5 LSB INL and 350kHz full-linear bandwidth capturing ECG R-waves and respiratory waveforms. Use Value: Supports clinical-grade waveform fidelity while consuming only 2.5mA at 400ksps - critical for wearable form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit parallel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1091ACEI+ | +3V supply only; identical pinout, same 10-bit SAR core and parallel interface but lower VDD range (2.7V–3.6V) | Targeted at 3V-only systems; not suitable for +5V analog domains requiring rail-to-rail input swing | Select MAX1091ACEI+ only when system uses 3V analog/digital rails and requires pin-compatible upgrade path |
| ADS7822U | Serial SPI interface (not parallel); 12-bit resolution; 200ksps max; requires external reference and separate power supply sequencing | Suited for space-constrained designs where serial interface reduces trace count, but adds µP firmware overhead | Choose ADS7822U when board area is critical and µP has SPI resources; avoid if parallel bus timing or legacy µP compatibility is required |
Compared with MAX1091ACEI+, the MAX1090ACEI+ supports +5V analog operation and wider VLOGIC range, making it preferable for mixed-supply industrial interfaces; versus ADS7822U, it delivers faster throughput and simpler hardware integration at the cost of higher pin count and fixed 10-bit resolution.
Availability
MAX1090ACEI+ is available at Aetrix Electronics and suitable for industrial control systems, portable data-acquisition devices, and patient monitoring equipment requiring stable component supply across extended production lifecycles.
Supply support for MAX1090ACEI+ 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, automotive, and communications markets.
The MAX1090ACEI+ belongs to Maxim's precision data-converter product line, designed specifically for low-power, space-efficient, and easy-to-integrate ADC solutions in battery-operated and multi-channel sensor systems.
FAQ
What is the operating temperature range for the MAX1090ACEI+?
The MAX1090ACEI+ is specified for commercial temperature operation from 0°C to +70°C. This range is validated per the device's ordering code suffix 'C' (e.g., ACEI = C-grade, 0°C to +70°C), and all electrical characteristics - including ±0.5 LSB INL and 400ksps sampling - are guaranteed across this interval without derating.
Does the MAX1090ACEI+ require an external clock to operate?
No, the MAX1090ACEI+ supports both internal and external clock modes. When configured for internal clock (D7=1, D6=0 in control byte), it generates its own 6MHz clock - eliminating external crystal or oscillator components. The CLK pin must be tied to VDD or GND in this mode to prevent floating.
How does the HBEN pin affect data readout on the MAX1090ACEI+?
The HBEN pin on the MAX1090ACEI+ controls multiplexing of the 10-bit conversion result: when HBEN = 0, D7–D0 carry the 8 LSBs; when HBEN = 1, D7–D0 carry the 2 MSBs (D8/D9), allowing full 10-bit reads on an 8-bit data bus. This avoids needing two separate read cycles or wider bus traces.
Can the MAX1090ACEI+ interface directly with a 3.3V microprocessor?
Yes, the MAX1090ACEI+ supports direct interfacing with 3.3V µPs via its VLOGIC pin, which accepts +2.7V to +5.5V digital supply voltage. When VLOGIC = 3.3V, outputs (D7–D0, INT) meet 3.3V logic thresholds, and inputs (CS, WR, RD) recognize 3.3V-compatible voltage levels - no level-shifting circuitry is needed.
What is the minimum acquisition time required before a valid conversion on the MAX1090ACEI+?
The MAX1090ACEI+ specifies a maximum acquisition time (tACQ) of 3.2µs under typical conditions (fCLK = 7.6MHz). This value is fixed by internal timing and applies regardless of source impedance below 3kΩ; for higher-impedance sources, tACQ increases per tACQ = 7(RS + 800Ω) × 12pF, requiring external RC filtering to maintain accuracy.
MAX1090ACEI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- -
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
MAX1090ACEI+ FAQ
1.How can I place an order for MAX1090ACEI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1090ACEI+ 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 MAX1090ACEI+ reliable?
The price and inventory of MAX1090ACEI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1090ACEI+ is usually 5 days.
3.What payment methods are accepted for MAX1090ACEI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1090ACEI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1090ACEI+?
MAX1090ACEI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1090ACEI+ 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 MAX1090ACEI+?
For technical support, including MAX1090ACEI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1090ACEI+ requirements.
6.How does Aetrix verify that MAX1090ACEI+ is sourced from the original manufacturer or authorized distributors?
All MAX1090ACEI+ 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 MAX1090ACEI+ meets industry standards.
7.What is the process for return or replacement of MAX1090ACEI+?
All MAX1090ACEI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1090ACEI+, 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 MAX1090ACEI+ part is unused and in its original packaging.
Return procedure for MAX1090ACEI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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