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Analog Devices Inc./Maxim Integrated MAX1029AEEP
- Part No.:
- MAX1029AEEP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1029AEEP.pdf
- Description:
- 10-BIT 300KSPS ADCS WITH FIFO
- Quantity:
- Payment:
- Shipping:
Inventory:376
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Product details
Overview
MAX1029AEEP from Maxim Integrated is a 10-bit, 300ksps serial analog-to-digital converter with integrated temperature sensor (±1.2°C error over –40°C to +85°C), 16-entry FIFO, and internal 2.5V reference. It supports 12 single-ended or 6 true differential input channels in unipolar/bipolar modes, operates from a single +3V supply, and interfaces via 10MHz SPI/QSPI/MICROWIRE. It is used in industrial control systems for real-time sensor data acquisition with on-chip averaging and AutoShutdown™.
For engineers reviewing the MAX1029AEEP datasheet, MAX1029AEEP pinout, MAX1029AEEP application, or MAX1029AEEP equivalent, this page delivers verified specifications, package mapping to 20-pin QSOP, functional pin roles, confirmed alternatives, and design-meaningful feature translation - all grounded in Maxim's official documentation for the exact part number.
Technical Context
The MAX1029AEEP employs a fully differential successive-approximation register (SAR) architecture with on-chip track-and-hold, supporting both single-ended and true differential inputs. Its internal oscillator enables internally timed conversions in clock modes 00, 01, and 10, while mode 11 supports externally clocked operation up to 300ksps using SCLK.
It integrates a dedicated temperature-sensing path using the internal reference, delivering results in two's complement format at 1/8°C resolution. The 16-deep FIFO buffers ADC and temperature results independently, allowing burst acquisition without serial bus contention - critical for deterministic sampling in embedded monitoring applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR - delivers 1024 discrete output codes with no missing codes across temperature. |
| Sampling Rate | 300ksps max (externally clocked) - supports high-speed transient capture in data loggers and system supervision. |
| INL / DNL | ±1 LSB each - ensures monotonicity and ≤0.1% full-scale linearity error for precision measurement. |
| Temperature Accuracy | ±1.2°C over –40°C to +85°C - enables reliable thermal monitoring without external calibration. |
| Reference | Internal 2.5V ±0.4% (2.48V–2.52V) - eliminates need for external reference component and reduces BOM count. |
| Supply Current | 1.75mA typical at 300ksps, 3V - enables low-power operation in battery-backed or energy-constrained systems. |
| Digital Interface | 10MHz 3-wire SPI/QSPI/MICROWIRE-compatible - interoperates with standard microcontroller peripherals without protocol translation. |
Pinout & Package
MAX1029AEEP is packaged in a 20-pin QSOP (Quad Small Outline Package) with 0.65mm pitch and exposed pad not present (TQFN variant applies only to MAX1031). Pin functions are validated per Maxim's Rev 5 datasheet (19-2854).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN9 | Analog Input Channels | 10 configurable single-ended inputs or 5 true differential pairs (e.g., AIN0/AIN1); supports unipolar (0–VREF) or bipolar (±VREF/2) ranges. |
| REF+/REF− | Reference Inputs | REF+ accepts 1.0V to VDD+50mV; REF− serves as negative reference or alternate analog input AIN10; internal reference bypass requires 0.1μF to GND. |
| CNVST/AIN11 | Conversion Start / Analog Input | Active-low conversion trigger; when configured as CNVST, initiates one-shot or scan-mode conversion without serial bus use. |
| SCLK | Serial Clock Input | Accepts 10MHz max clock (40–60% duty cycle); controls timing of DIN latching (rising edge) and DOUT output (falling edge). |
| CS | Chip Select | Active-low enable for serial interface; places DOUT in high-impedance state when high; required to initiate all register writes/reads. |
| DIN/DOUT | Serial Data I/O | DIN receives 8-bit setup bytes (MSB first); DOUT outputs 16-bit result words (MSB-first, 4 leading zeros + 10-bit code + 2 sub-bits). |
| EOC | End-of-Conversion Flag | Active-low open-drain signal pulses low after conversion completion in clock modes 00/01/10; always high in mode 11. |
| VDD/GND | Power Supply | +2.7V to +3.6V single supply; requires local 0.1μF ceramic bypass at each pin; GND connects to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 16-entry FIFO | Buffers up to 16 ADC results plus one temperature reading, enabling background acquisition while host processes prior data - reduces MCU polling overhead. |
| True differential track-and-hold | Supports simultaneous sampling of paired inputs (e.g., AIN2/AIN3) with common-mode noise rejection - improves SNR in noisy industrial environments. |
| Internal temperature sensor | Delivers calibrated Celsius readings (1/8°C resolution, two's complement) using internal reference - eliminates external sensor and signal conditioning circuitry. |
| AutoShutdown™ mode | Reduces supply current to ≤0.5μA during idle periods - extends battery life in portable instrumentation and remote sensors. |
| Configurable clock modes | Four modes (00–11) allow flexible timing control: software-triggered, CNVST-driven, serial-initiated, or SCLK-synchronized - adapts to real-time scheduling constraints. |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
|
Use Scenario: Continuous logging of thermocouple, RTD, and pressure transducer outputs in PLC-based control cabinets. IC Role / Device Role / Timing Role: Primary ADC for multi-channel analog front-end; performs synchronized scans with internal averaging to suppress 50/60Hz noise. Use Value: 12-channel support and FIFO reduce host interrupt frequency by >75%, while ±1 LSB INL ensures traceable calibration compliance per IEC 61000-4-30. |
Use Scenario: Compact wearable ECG/SpO₂ module acquiring biopotential signals and ambient temperature for algorithmic compensation. IC Role / Device Role / Timing Role: Dual-role device: digitizes differential electrode inputs and concurrently measures die temperature to correct gain drift in real time. Use Value: On-die temperature sensor accuracy (±1.2°C) enables <1% gain error correction across operating range - meets AAMI EC11 clinical accuracy requirements. |
| Data Logger for Environmental Sensors | System-Level Power Supervision |
|
Use Scenario: Solar-powered field node measuring soil moisture, air temperature, and light intensity over extended duty cycles. IC Role / Device Role / Timing Role: Low-power ADC managing scheduled wake-up bursts; uses AutoShutdown™ between samples and internal reference to minimize external components. Use Value: 1.75mA active current and 0.5μA shutdown current extend 2000mAh LiSOCl₂ battery life to >5 years at 1-sample/minute interval. |
Use Scenario: Embedded controller monitoring rail voltages (12V, 5V, 3.3V), CPU core temperature, and fan tachometer in network switch firmware. IC Role / Device Role / Timing Role: System health monitor interfacing directly to microcontroller GPIO and SPI; provides timestamped voltage/temp snapshots via FIFO. Use Value: Simultaneous 12-channel scanning and temperature readout within single 3.3ms window enables deterministic fault detection latency <10ms - critical for IEEE 802.3az energy-efficient Ethernet. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7953IRHBT | 12-bit resolution, 1MSPS, SPI interface, no integrated temp sensor, 16-channel single-ended only. | Lacks on-die temperature sensing and FIFO; requires external reference and signal conditioning for bipolar inputs. | Select when higher resolution and speed outweigh need for integrated thermal monitoring and reduced BOM. |
| AD7476AARMZ | 12-bit, 1MSPS, single-channel, no FIFO, no temp sensor, 2.7–5.25V supply. | Not multichannel; lacks scan mode, averaging, and temperature functionality - unsuitable for system supervision. | Choose only for simple, high-speed single-signal digitization where MAX1029AEEP's integrated features add unnecessary complexity. |
Compared with ADS7953IRHBT and AD7476AARMZ, the MAX1029AEEP uniquely combines 12-channel flexibility, on-chip FIFO, internal temperature sensor, and AutoShutdown™ in a single 20-pin QSOP - reducing system-level component count and firmware overhead for embedded monitoring tasks.
Availability
MAX1029AEEP is available at Aetrix Electronics and suitable for industrial process monitoring, patient vital sign acquisition, and environmental data logging requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX1029AEEP 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 MAX1027/MAX1029/MAX1031 family was engineered specifically for compact, low-power system supervision - integrating ADC, temperature sensing, FIFO, and reference in minimal footprint to simplify front-end design in space-constrained embedded systems.
FAQ
What is the operating temperature range for the MAX1029AEEP?
The MAX1029AEEP is specified for operation from –40°C to +85°C, matching the extended industrial temperature grade. This range is validated across all electrical parameters including INL, DNL, reference stability, and temperature sensor accuracy - ensuring reliable performance in harsh environments such as factory automation cabinets or outdoor telemetry nodes. The MAX1029AEEP maintains ±1 LSB linearity and ±1.2°C thermal measurement error across this full span.
Does the MAX1029AEEP require an external reference voltage?
No, the MAX1029AEEP includes a precision internal 2.5V reference (2.48V–2.52V, ±30ppm/°C TC) that can be used for both analog conversions and temperature measurements. An external differential reference may be applied via REF+ and REF− pins if higher accuracy or custom scaling is needed, but doing so disables the internal reference and increases component count. The MAX1029AEEP's internal reference eliminates the need for external trimming or calibration in most system-supervision applications.
How many analog input channels does the MAX1029AEEP support?
The MAX1029AEEP supports 12 single-ended analog inputs (AIN0–AIN11) or 6 true differential input pairs (e.g., AIN0/AIN1, AIN2/AIN3, etc.). Channel AIN11 is multiplexed with the CNVST function and must be configured in the setup register before use. Unlike the MAX1031 (16-channel) or MAX1027 (8-channel), the MAX1029AEEP's 12-channel count balances density and package size in its 20-pin QSOP form factor - making it optimal for mid-complexity monitoring systems.
Can the MAX1029AEEP perform simultaneous sampling of multiple channels?
No, the MAX1029AEEP uses a single SAR core with sequential channel scanning - it does not support true simultaneous sampling. However, its fast 3.5μs acquisition time and 16-entry FIFO enable tightly spaced sequential sampling (e.g., 12 channels in <45μs), which approximates simultaneity for low-bandwidth signals like temperature or DC voltage rails. For applications requiring true phase-matched acquisition (e.g., motor current/voltage), an external sample-hold array or a dedicated simultaneous-sampling ADC would be required instead of the MAX1029AEEP.
What is the purpose of the EOC pin on the MAX1029AEEP?
The EOC (End of Conversion) pin on the MAX1029AEEP is an active-low, open-drain flag that signals when conversion data is ready for readout. In clock modes 00, 01, and 10, EOC pulses low upon completion of each conversion or scan; in mode 11 (externally clocked), EOC remains high and is unused. This hardware handshake allows interrupt-driven data retrieval without polling, reducing MCU resource usage - especially valuable in battery-operated MAX1029AEEP deployments where deterministic low-power operation is critical.
MAX1029AEEP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 300k
- Number of Inputs:
- 6, 12
- Input Type:
- Differential, Single Ended
- Data Interface:
- 3-Wire, Microwire, QSPI, SPI
- 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:
- Internal Oscillator, Temperature Sensor
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-QSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1029AEEP FAQ
1.How can I place an order for MAX1029AEEP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1029AEEP 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 MAX1029AEEP reliable?
The price and inventory of MAX1029AEEP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1029AEEP is usually 5 days.
3.What payment methods are accepted for MAX1029AEEP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1029AEEP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1029AEEP?
MAX1029AEEP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1029AEEP 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 MAX1029AEEP?
For technical support, including MAX1029AEEP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1029AEEP requirements.
6.How does Aetrix verify that MAX1029AEEP is sourced from the original manufacturer or authorized distributors?
All MAX1029AEEP 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 MAX1029AEEP meets industry standards.
7.What is the process for return or replacement of MAX1029AEEP?
All MAX1029AEEP units undergo pre-shipment inspection (PSI). If there is an issue with MAX1029AEEP, 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 MAX1029AEEP part is unused and in its original packaging.
Return procedure for MAX1029AEEP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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