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Analog Devices Inc./Maxim Integrated MAX1329BETL+
- Part No.:
- MAX1329BETL+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Specialized ICs
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
MAX1329BETL+.pdf
- Description:
- IC DATA ACQU SYST 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,983
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Product details
Overview
MAX1329BETL+ from Maxim Integrated is a highly integrated 12-/16-bit smart data acquisition system (DAS) featuring a SAR ADC, dual 12-bit force-sense DACs, PGA (gain 1–8), internal 2.5V reference with adjustable buffers, temperature sensor, analog/digital programmable I/Os, and voltage monitors. It operates from 1.8V–3.6V digital supply and supports 312ksps (12-bit) or 1000sps (16-bit DSP mode), targeting portable medical instruments and battery-powered sensor interfaces.
For engineers reviewing the MAX1329BETL+ datasheet, MAX1329BETL+ pinout, MAX1329BETL+ application, or MAX1329BETL+ equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, application-specific role definitions, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The MAX1329BETL+ integrates a single SAR ADC with user-selectable normal (12-bit/312ksps) or DSP (16-bit/1000sps) modes, a 16-word DAC FIFO for DDS waveform generation, and a programmable gain amplifier (1×–8×) preceding a 16-input differential multiplexer. Its dual 12-bit force-sense DACs share independent reference buffering and support unipolar/bipolar output ranges.
It includes four analog programmable I/Os (APIOs) configurable as level shifters or wake-up inputs, four digital programmable I/Os (DPIOs) for direct control of ADC conversion rate and sleep/shutdown, and dual voltage monitors (VM1 for DVDD, VM2 for AVDD) with programmable thresholds and hysteresis. An internal oscillator (3.576–3.797MHz) and SPI/QSPI/MICROWIRE-compatible 4-wire serial interface complete the system-on-chip architecture.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ADC Resolution | 12 bits (no missing codes) at 312ksps - guarantees full-scale linearity for high-speed sensor digitization without code gaps. |
| DSP Mode Resolution | 16 bits at 1000sps - enables high-precision low-frequency measurements such as thermocouple or strain gauge readings. |
| PGA Gain Range | 1×, 2×, 4×, 8× - reduces external signal conditioning components for microvolt-level sensor outputs. |
| Dual DAC Resolution | 12-bit force-sense DACs - provides precise closed-loop current/voltage control in sensor excitation or calibration circuits. |
| Reference Options | Internal 2.5V ±0.5% reference; adjustable to 1.25V, 2.048V, or 2.5V via REFADJ/REFDAC buffers - supports multiple ADC/DAC full-scale ranges without external references. |
| Supply Voltage Range | Digital: 1.8V–3.6V; Analog: 2.7V–5.5V - enables operation from single Li-ion or dual-supply industrial rails. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and portable medical environments with guaranteed performance across full range. |
Pinout & Package
MAX1329BETL+ is housed in a 40-pin thin QFN package (6mm × 6mm) with exposed pad for thermal management. The package supports reflow soldering and meets RoHS compliance (lead-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AVDD | Analog power supply | Provides 2.7V–5.5V bias for ADC, DACs, PGA, and analog switches; requires 10µF bypass to AGND. |
| DVDD | Digital power supply | Supplies 1.8V–3.6V logic core; internal charge pump boosts AVDD when DVDD < 2.7V. |
| AGND / DGND | Analog/digital ground | Separate ground pins minimize noise coupling; must be connected externally with low-inductance path. |
| REFADC / REFDAC | ADC/DAC reference inputs | Accept internal or external references; buffered outputs support 1.25V/2.048V/2.5V selection via AREF<1:0>/DREF<1:0>. |
| APIO1–APIO4 | Analog programmable I/Os | Configurable as logic I/O, wake-up inputs, or level shifters for SPI communication with AVDD-powered slaves. |
| DPIO1–DPIO4 | Digital programmable I/Os | Control ADC start, DAC load, analog switch state, sleep/shutdown, and generate interrupts on conversion completion. |
| AIN0–AIN15 | Analog input channels | 16-channel differential multiplexer inputs; support external differential or single-ended signals with PGA pre-amplification. |
| DIN / DOUT / SCLK / CS | 4-wire serial interface | SPI/QSPI/MICROWIRE-compatible; supports up to 20MHz clock (DVDD ≥2.7V) for fast register access and data streaming. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 16-word DAC FIFO | Enables direct digital synthesis (DDS) of arbitrary waveforms using DACA without host CPU intervention. |
| Programmable dual voltage monitors | VM1 (DVDD) and VM2 (AVDD) provide independently configurable trip thresholds and hysteresis for robust brown-out detection. |
| On-chip temperature sensor | ±3°C accuracy over -40°C to +85°C enables system-level thermal compensation and diagnostics without external sensors. |
| Internal oscillator with CLKIO | 3.6864MHz ±0.5% oscillator eliminates need for external crystal; CLKIO pin allows clock output or external clock input. |
| Charge-pump-based AVDD generation | Boosts analog supply from DVDD when <2.7V, enabling full analog performance from single 1.8V–3.0V battery source. |
Applications
| Portable ECG Monitor | Battery-Powered Gas Sensor |
|---|---|
Use Scenario: Continuous analog front-end for biopotential signal acquisition with low-power operation and on-board calibration. IC Role / Device Role / Timing Role: Single-chip DAS performs analog multiplexing, PGA amplification, 12-bit ADC conversion at 250ksps, and dual DAC-driven electrode offset correction. Use Value: Eliminates discrete op amps, reference ICs, and DACs-reducing BOM count by ≥7 components while maintaining ENOB > 10.5 bits at 10kHz. | Use Scenario: Electrochemical gas sensor interface requiring precise bias voltage control and low-noise current measurement. IC Role / Device Role / Timing Role: Dual DACs set sensor bias; PGA conditions transimpedance amplifier output; ADC digitizes current with 16-bit DSP mode for ppm-level resolution. Use Value: Internal 2.5V reference and 16-bit DSP mode achieve <100nA current resolution without external precision references or oversampling firmware. |
| Industrial PLC Analog Input Module | Low-Cost Portable Oscilloscope |
Use Scenario: Multi-channel analog input card for DIN-rail mounted controllers needing isolation, diagnostics, and wide supply tolerance. IC Role / Device Role / Timing Role: Configured with APIOs as isolated wake-up triggers and DPIOs controlling external analog switches; voltage monitors supervise both DVDD and AVDD rails. Use Value: Dual rail monitoring and programmable I/Os reduce external supervisor IC count; 40-pin QFN fits compact PCB layouts with thermal pad for 85°C ambient operation. | Use Scenario: Handheld scope capturing transient signals up to 4MHz bandwidth with battery life optimization. IC Role / Device Role / Timing Role: ADC operates in normal mode (312ksps) with full-power bandwidth of 4MHz; internal oscillator synchronizes sampling; sleep mode cuts current to 2.5µA. Use Value: 4MHz FPBW and 71dB SINAD enable accurate 100kHz sine reconstruction; shutdown current <1µA extends battery runtime between captures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar smart data acquisition applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1328BETL+ | Same pinout and feature set but lacks internal temperature sensor and dual voltage monitors; no VM1/VM2 blocks. | Not suitable for systems requiring on-chip thermal or supply supervision; requires external supervisors for rail monitoring. | Select MAX1328BETL+ only if temperature sensing and voltage monitoring are handled externally and BOM cost reduction is critical. |
| AD7682BCPZ | 16-bit SAR ADC only (no DACs, PGA, or programmable I/O); requires external reference, op amps, and digital control logic. | Used in fixed-function DAQ where flexibility is not needed; lacks integrated signal chain components. | Choose AD7682BCPZ when higher standalone ADC resolution is required and system already implements separate DAC/PGA/reference circuitry. |
Compared with MAX1328BETL+, the MAX1329BETL+ adds integrated thermal and supply supervision-reducing component count and improving system-level reliability. Against AD7682BCPZ, it trades raw ADC resolution for full signal-chain integration, enabling faster time-to-market for compact, battery-operated DAS designs.
Availability
MAX1329BETL+ is available at Aetrix Electronics and suitable for portable medical instruments, electrochemical sensor interfaces, industrial PLC analog input modules, and low-cost portable oscilloscopes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1329BETL+ 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, medical, and communications applications.
The MAX1329BETL+ belongs to Maxim's smart data acquisition system product line, engineered to replace multi-chip sensor front-ends with a single IC delivering ADC, DAC, PGA, reference, and supervisory functions in space-constrained, low-power systems.
FAQ
What is the maximum sample rate of the MAX1329BETL+ ADC in normal mode?
The MAX1329BETL+ ADC achieves up to 312ksps in normal mode with guaranteed 12-bit resolution and no missing codes. This rate is supported across the full operating temperature range (-40°C to +85°C) when DVDD ≥ 2.7V and AVDD ≥ 5.0V. At lower supplies, the achievable rate decreases per the internal charge pump and timing constraints specified in the datasheet.
Does the MAX1329BETL+ include an internal temperature sensor?
Yes, the MAX1329BETL+ integrates an internal temperature sensor with ±3°C accuracy over -40°C to +85°C. It also supports external diode temperature sensing with 17:1 drive ratio and 1/8°C/LSB resolution when VREFADC = 2.5V. Both sensors feed into the same conversion pipeline and are accessible via dedicated registers.
Can the MAX1329BETL+ operate from a single 1.8V supply?
The MAX1329BETL+ digital core (DVDD) operates from 1.8V–3.6V, but its analog section (AVDD) requires 2.7V–5.5V. When DVDD is 1.8V, the internal charge pump generates AVDD (~2.85–3.20V depending on configuration), enabling full analog functionality from a single low-voltage battery. This eliminates the need for a second analog rail in portable designs.
How many programmable I/Os does the MAX1329BETL+ provide, and what are their roles?
The MAX1329BETL+ provides four analog programmable I/Os (APIO1–APIO4) and four digital programmable I/Os (DPIO1–DPIO4). APIOs can serve as level shifters for SPI communication with AVDD-powered peripherals or as wake-up inputs. DPIOs directly control ADC conversion start, DAC loading, analog switch states, sleep/shutdown entry, and generate interrupts upon conversion completion.
What reference voltages does the MAX1329BETL+ support for ADC and DAC operation?
The MAX1329BETL+ supports independent reference configurations for ADC and DAC: internal 2.5V reference (±0.5% initial accuracy), adjustable to 1.25V, 2.048V, or 2.5V via REFADJ/REFDAC buffers, or external references applied to REFADC/REFDAC pins (1.225V to AVDD–0.1V). Reference buffers provide programmable gain (0.5×, 0.8192×, or 1×) to match full-scale requirements.
MAX1329BETL+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Data Acquisition Systems (DASs)
- Applications:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (6x6)
- Grade:
- -
- Qualification:
- -
MAX1329BETL+ FAQ
1.How can I place an order for MAX1329BETL+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1329BETL+ 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 MAX1329BETL+ reliable?
The price and inventory of MAX1329BETL+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1329BETL+ is usually 5 days.
3.What payment methods are accepted for MAX1329BETL+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1329BETL+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1329BETL+?
MAX1329BETL+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1329BETL+ 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 MAX1329BETL+?
For technical support, including MAX1329BETL+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1329BETL+ requirements.
6.How does Aetrix verify that MAX1329BETL+ is sourced from the original manufacturer or authorized distributors?
All MAX1329BETL+ 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 MAX1329BETL+ meets industry standards.
7.What is the process for return or replacement of MAX1329BETL+?
All MAX1329BETL+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1329BETL+, 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 MAX1329BETL+ part is unused and in its original packaging.
Return procedure for MAX1329BETL+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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