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Analog Devices Inc./Maxim Integrated MAX1029BEEP+
- Part No.:
- MAX1029BEEP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX1029BEEP+.pdf
- Description:
- IC ADC 10BIT 300KSPS 20-QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,166
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Product details
Overview
MAX1029BEEP+ 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), internal 2.5V reference (±30ppm/°C TC), and 16-entry FIFO. 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. Used in industrial control systems for multichannel voltage and temperature monitoring.
For engineers reviewing the MAX1029BEEP+ datasheet, MAX1029BEEP+ pinout, MAX1029BEEP+ application, or MAX1029BEEP+ equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and two validated alternative parts - all grounded in the official MAX1027/MAX1029/MAX1031 datasheet Rev 5 (August 2011).
Technical Context
The MAX1029BEEP+ implements a fully differential successive-approximation register (SAR) ADC architecture with on-chip track-and-hold, supporting both single-ended and true differential acquisition. Its internal oscillator enables autonomous conversion timing in clock modes 00, 01, and 10, while external SCLK up to 10MHz drives high-speed serial communication and externally timed sampling at 300ksps.
It integrates a dedicated temperature-sensing path using the same internal reference and SAR core, delivering 1/8°C resolution in two's complement format. Input configuration - including channel selection, scan mode, averaging (1–16 samples), and unipolar/bipolar mode - is controlled entirely via its 8-bit SPI-compatible register map, with no external configuration pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit SAR - delivers 1024 discrete output codes with no missing codes guaranteed over temperature. |
| Sampling Rate | 300ksps max - achievable only with external clocking (CKSEL = 11); internal clock limits to ~270ksps due to 4.4MHz ±10% oscillator tolerance. |
| INL / DNL | ±1 LSB - ensures monotonicity and <0.1% full-scale linearity error across –40°C to +85°C, critical for precision control loops. |
| Temperature Accuracy | ±1.2°C (max) - measured over full operating range; enables direct board-level thermal monitoring without calibration. |
| Reference Voltage | 2.50V ±10mV - internal bandgap reference with ±30ppm/°C drift; eliminates need for external precision reference in cost-sensitive designs. |
| Supply Current | 1.05–1.2mA at 300ksps - low power enables battery-operated data loggers; drops to 0.2–5μA in AutoShutdown™ mode. |
| Digital Interface | 3-wire SPI/QSPI/MICROWIRE - compatible with standard microcontroller peripherals; supports CPOL/CPHA = 00 or 11; EOC signal simplifies interrupt-driven firmware. |
Pinout & Package
MAX1029BEEP+ is housed in a 20-pin QSOP package (5.3mm × 10.2mm, 0.65mm pitch) with gull-wing leads. The exposed pad is absent - unlike the TQFN variant - confirming leadframe-based thermal design optimized for standard PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 17–20 | No Connection | Unbonded die pads; must remain floating or tied to GND per layout best practice - no electrical function. |
| 2–11 | AIN0–AIN9 | Configurable analog inputs - support single-ended or true differential pairs (e.g., AIN0/AIN1); AIN8–AIN9 available only on MAX1029/MAX1031. |
| 12 | CNVST/AIN11 | Active-low conversion trigger or analog input - dual-function pin; when used as CNVST, initiates one-shot or scan-mode conversions without serial bus overhead. |
| 13 | REF-/AIN10 | Negative reference input or analog input - selects external differential reference (REF–) or extends channel count; REF– mode disables AIN10 function. |
| 14 | REF+ | Positive reference input - accepts internal 2.5V reference or external 1.0V to VDD+50mV; requires 0.1μF bypass to GND. |
| 15 | GND | Analog/digital ground - single ground pin; layout requires low-impedance connection to system AGND plane. |
| 16 | VDD | +2.7V to +3.6V supply - powers entire core including temp sensor and FIFO; requires local 0.1μF ceramic decoupling. |
| 17 | SCLK | Serial clock input - accepts 10MHz max; duty cycle 40–60%; controls data latching (DIN) and output timing (DOUT). |
| 18 | CS | Active-low chip select - enables serial interface; DOUT goes high-Z when CS = high; defines SPI frame boundaries. |
| 19 | DIN | Serial data input - MSB-first 8-bit register writes (setup, conversion, averaging); latched on rising SCLK edge. |
| 20 | DOUT | Serial data output - MSB-first 16-bit result reads (10-bit code + 6 status bits); updated on falling SCLK edge. |
| - | EOC | End-of-conversion open-drain output - pulses low after each conversion completes in clock modes 00/01; remains high in mode 11. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated temperature sensor | Delivers calibrated Celsius readings (1/8°C resolution, ±1.2°C max error) using same ADC core and reference - eliminates separate thermal IC and reduces BOM count. |
| 16-entry FIFO buffer | Stores up to 16 voltage results + 1 temperature result - enables burst acquisition without CPU intervention, reducing firmware latency and serial bus contention. |
| True differential analog inputs | Supports 6 independent differential pairs (AIN0/AIN1 through AIN10/AIN11) with common-mode rejection - essential for noisy industrial sensor interfaces like RTDs or strain gauges. |
| Internal clock & AutoShutdown™ | On-chip 4.4MHz oscillator enables self-timed conversions; AutoShutdown cuts supply current to sub-5μA between conversions - extends battery life in portable instrumentation. |
| Flexible reference options | Switches seamlessly between internal 2.5V reference (±30ppm/°C) and external differential reference - accommodates legacy systems requiring 3.3V or 5V full-scale ranges. |
Applications
| Industrial Process Monitoring | Patient Vital Sign Acquisition |
|---|---|
|
Use Scenario: Continuous logging of thermocouple outputs, pressure transducer voltages, and ambient temperature in PLC-controlled factory lines. IC Role / Device Role / Timing Role: Multichannel ADC with integrated temp sensor performs synchronized voltage and board-temperature sampling every 3.3ms (300ksps aggregate rate). Use Value: Eliminates need for external reference and temperature IC, reducing component count by ≥3 while maintaining ±1 LSB linearity for closed-loop PID control accuracy. |
Use Scenario: Portable ECG/SpO₂ monitor acquiring lead voltages, respiration impedance, and skin temperature from multiple electrodes. IC Role / Device Role / Timing Role: Single-chip analog front-end digitizes 8 biopotential channels and on-board thermal reference at 1ksps per channel using scan mode and FIFO buffering. Use Value: 10-bit resolution with ±1 LSB DNL ensures accurate R-wave amplitude detection; internal temp sensor validates electrode contact integrity in real time. |
| Data Logging for Environmental Sensors | Automated Test Equipment (ATE) Channel Expansion |
|
Use Scenario: Battery-powered weather station measuring humidity, barometric pressure, solar irradiance, and enclosure temperature over 24-hour cycles. IC Role / Device Role / Timing Role: Low-power ADC wakes periodically via CNVST pulse, acquires 12 sensor voltages + internal temp, then enters AutoShutdown™ until next interval. Use Value: 1.2mA active current and 0.5μA shutdown current enable >1-year operation on two AA cells; FIFO prevents data loss during MCU sleep transitions. |
Use Scenario: Modular ATE system adding 12-channel analog measurement capability to existing digital test controller via SPI expansion slot. IC Role / Device Role / Timing Role: High-speed ADC interfaces directly to FPGA-based controller using 10MHz SCLK; EOC signal triggers DMA read of FIFO contents without polling. Use Value: 300ksps throughput and deterministic 2.7μs conversion time allow precise timestamping of transient events; SPI compatibility avoids custom interface logic. |
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 |
|---|---|---|---|
| ADS7822U | 8-bit, 200ksps, no internal reference or temp sensor; SPI interface only (no QSPI/MICROWIRE); 10-pin VSSOP package. | Lacks FIFO, temperature sensing, and bipolar mode - suitable only for basic single-channel voltage monitoring where resolution and features are secondary. | Select when cost is primary constraint and system already provides external reference, temp IC, and FIFO logic - not a functional replacement. |
| AD7490BRUZ | 12-bit, 1MSPS, internal reference (2.5V, ±10ppm/°C), no integrated temp sensor; 20-pin TSSOP; SPI-only interface. | Higher resolution and speed but no on-chip temperature measurement - requires separate thermal IC for board monitoring tasks. | Choose when 12-bit precision and 1MSPS sampling are required, and temperature sensing is handled elsewhere - superior DC specs but higher BOM complexity. |
Compared with MAX1029BEEP+, ADS7822U trades resolution and features for lower cost and smaller footprint, while AD7490BRUZ upgrades speed and accuracy but removes integrated thermal sensing - making MAX1029BEEP+ uniquely balanced for compact, self-contained industrial monitoring where voltage + temperature co-acquisition is mandatory.
Availability
MAX1029BEEP+ is available at Aetrix Electronics and suitable for industrial control systems, portable medical devices, and environmental data loggers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1029BEEP+ 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 industrial, automotive, and communications applications - emphasizing integration, reliability, and low-power operation.
The MAX1027/MAX1029/MAX1031 family was engineered specifically for space-constrained, multichannel data acquisition systems needing simultaneous voltage and temperature measurement - targeting PLC I/O modules, handheld test equipment, and battery-powered sensors.
FAQ
What is the operating temperature range for the MAX1029BEEP+?
The MAX1029BEEP+ is specified for continuous operation from –40°C to +85°C. This extended temperature range is confirmed in the Ordering Information table (MAX1029BEEP+T denotes the –40°C to +85°C grade) and supported by all DC and dynamic specifications in the Electrical Characteristics section across that full range.
Does the MAX1029BEEP+ require an external reference voltage?
No, the MAX1029BEEP+ includes a precision internal 2.5V reference (2.48V to 2.52V, ±30ppm/°C TC) that can be used directly for all conversions. An external differential reference may be applied via REF+ and REF– pins if system-level accuracy or nonstandard full-scale ranges are required - but it is optional, not mandatory.
How many analog input channels does the MAX1029BEEP+ support?
The MAX1029BEEP+ supports 12 single-ended analog inputs (AIN0–AIN11) or 6 true differential input pairs (e.g., AIN0/AIN1, AIN2/AIN3, up to AIN10/AIN11). This is explicitly stated in the General Description and confirmed in the Pin Description table, distinguishing it from the 8-channel MAX1027 and 16-channel MAX1031.
Can the MAX1029BEEP+ perform temperature measurements without external components?
Yes, the MAX1029BEEP+ contains a factory-calibrated internal temperature sensor with ±1.2°C accuracy over –40°C to +85°C. No external thermistor, diode, or reference is needed - temperature data is acquired alongside voltage channels and read from the same FIFO via the standard SPI interface.
What package type is used for the MAX1029BEEP+?
The MAX1029BEEP+ uses a 20-pin QSOP (Quad Small Outline Package) with dimensions 5.3mm × 10.2mm and 0.65mm lead pitch. This is clearly indicated in the Ordering Information table and distinguishes it from the 28-pin TQFN option used by the MAX1031 - the "EP" suffix is absent, confirming no exposed pad.
MAX1029BEEP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- -
MAX1029BEEP+ FAQ
1.How can I place an order for MAX1029BEEP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1029BEEP+ 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 MAX1029BEEP+ reliable?
The price and inventory of MAX1029BEEP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1029BEEP+ is usually 5 days.
3.What payment methods are accepted for MAX1029BEEP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1029BEEP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1029BEEP+?
MAX1029BEEP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1029BEEP+ 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 MAX1029BEEP+?
For technical support, including MAX1029BEEP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1029BEEP+ requirements.
6.How does Aetrix verify that MAX1029BEEP+ is sourced from the original manufacturer or authorized distributors?
All MAX1029BEEP+ 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 MAX1029BEEP+ meets industry standards.
7.What is the process for return or replacement of MAX1029BEEP+?
All MAX1029BEEP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1029BEEP+, 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 MAX1029BEEP+ part is unused and in its original packaging.
Return procedure for MAX1029BEEP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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