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Analog Devices Inc./Maxim Integrated MAX1033BEUP+
- Part No.:
- MAX1033BEUP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX1033BEUP+.pdf
- Description:
- IC ADC 14BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,385
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Product details
Overview
MAX1033BEUP+ from Maxim Integrated is a 4-channel (single-ended) or 2-channel (true differential), 14-bit successive-approximation ADC with ±3 × VREF multirange input capability, 115ksps maximum sample rate, and SPI/QSPI/MICROWIRE-compatible serial interface. It operates from a single +5V analog supply and supports digital interfacing down to 2.7V via separate DVDDO, enabling integration into mixed-voltage industrial data-acquisition systems.
For engineers reviewing the MAX1033BEUP+ datasheet, MAX1033BEUP+ pinout, MAX1033BEUP+ application, or MAX1033BEUP+ equivalent, key selection considerations include its software-programmable per-channel input ranges (±3×VREF, ±6×VREF, etc.), ±16.5V overvoltage-tolerant inputs, internal +4.096V reference, 20-pin TSSOP package, and -40°C to +85°C industrial temperature rating.
Technical Context
The MAX1033BEUP+ implements a fully differential SAR architecture with integrated track-and-hold, supporting both unipolar and bipolar conversions across seven single-ended and three differential input voltage ranges. Its analog front-end includes fault-tolerant input protection and programmable channel configuration via an 8-bit control byte.
It uses four independent power domains-AVDD1/AGND1 (analog core), AVDD2/AGND2 (preamplifier), DVDD/DGND (digital logic), and DVDDO/DGNDO (I/O)-each requiring local 0.1µF bypassing to minimize noise coupling and ensure specified DC accuracy (±0.25 LSB INL) and dynamic performance (84 dB SINAD at 5 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete output codes for high-fidelity signal digitization in precision measurement. |
| Max Sample Rate | 115 ksps - enables real-time capture of fast transients in motor control feedback or sensor monitoring loops. |
| Analog Input Channels | 4 single-ended or 2 true-differential - provides flexible signal routing for multi-sensor industrial I/O modules. |
| Input Voltage Ranges | ±3×VREF, ±6×VREF, (±3×VREF)/2, etc. - allows dynamic range optimization per channel without external gain switching. |
| Reference | Internal +4.096V ±1% or external 3.800V–4.136V - eliminates need for external reference IC in space-constrained designs. |
| Overvoltage Tolerance | ±16.5V on all analog inputs - protects against field-wiring faults in 4–20mA loop or PLC analog input cards. |
| Supply Voltages | AVDD1/AVDD2/DVDD = 4.75–5.25V; DVDDO = 2.7–5.25V - supports interoperability with 3.3V microcontrollers while maintaining analog integrity. |
Pinout & Package
The MAX1033BEUP+ is housed in a 20-pin TSSOP package (5.0mm × 6.5mm, 0.65mm pitch) with exposed pad for thermal enhancement. Pin assignments are optimized for analog/digital ground separation and low-noise layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AGND1) | Analog Ground 1 | Primary analog reference node; must be tied to AGND2, AGND3, DGND, DGNDO at single point near device. |
| 2–5 (CH0–CH3) | Analog Input Channels | Software-configurable for single-ended or differential operation; each supports ±16.5V fault tolerance. |
| 7 (CS) | Active-Low Chip Select | Enables serial interface; must be driven low before SCLK/DIN activity to initiate conversion sequence. |
| 8 (DIN) | Serial Data Input | Accepts 8-bit configuration byte (START, C2–C0, DIF/SGL, R2–R0) on rising SCLK edges. |
| 9 (SSTRB) | Serial Strobe Output | Rising edge indicates valid conversion result ready on DOUT when using internal clock mode. |
| 10 (SCLK) | Serial Clock Input | Drives data transfer timing; supports external clock up to 3.5 MHz or internal oscillator. |
| 11 (DOUT) | Serial Data Output | Delivers 14-bit conversion result MSB-first on falling SCLK edges; high-impedance when CS is high. |
| 12–13 (DGNDO, DGND) | Digital I/O and Logic Ground | Separate return paths prevent digital noise from modulating analog measurements. |
| 14–15 (DVDDO, DVDD) | Digital I/O and Core Supply | DVDDO powers I/O buffers (2.7–5.25V); DVDD powers internal logic (4.75–5.25V). |
| 16–17 (REFCAP, REF) | Reference Bypass and Output | REFCAP selects internal/external reference mode; REF outputs +4.096V or accepts external 3.8–4.136V. |
| 18–20 (AVDD2, AGND2, AGND3) | Preamplifier Supply & Analog Grounds | AVDD2 powers input buffer stage; AGND2 carries higher current than AGND1 and must be connected together. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel software-programmable input range | Enables simultaneous acquisition of sensors with mismatched output spans (e.g., 0–5V pressure and ±10V accelerometer) without external scaling. |
| ±16.5V overvoltage-tolerant analog inputs | Eliminates need for external clamping diodes or series resistors in industrial field-connected applications. |
| Internal +4.096V reference with ±30 ppm/°C drift | Reduces BOM count and PCB area while meeting 0.025% FSR channel-to-channel gain matching spec. |
| SPI/QSPI/MICROWIRE-compatible serial interface | Ensures drop-in compatibility with legacy microcontroller firmware and standard peripheral drivers. |
| Four independent power domains with dedicated grounds | Allows partitioned PCB layout to suppress digital switching noise from degrading SNR below 84 dB. |
Applications
| Industrial Process Monitoring | Data-Acquisition Systems |
|---|---|
Use Scenario: Continuous logging of temperature, pressure, and flow signals from factory floor sensors into a PLC-based SCADA system. IC Role / Device Role / Timing Role: 14-bit ADC digitizing multiple 4–20mA loop signals with programmable bipolar ranges and ±16.5V fault tolerance. Use Value: Enables direct connection to industrial transmitters without signal conditioning, reducing system cost and failure points. | Use Scenario: Portable handheld test equipment capturing transient waveforms from mechanical vibration or acoustic sources. IC Role / Device Role / Timing Role: High-speed sampling ADC with 115ksps throughput and 84dB SINAD delivering accurate time-domain representation. Use Value: Captures 5kHz spectral content with <1 LSB integral nonlinearity, supporting ISO 20816 vibration analysis compliance. |
| Avionics Sensor Interfaces | Robotics Joint Control |
Use Scenario: Converting analog outputs from inertial measurement units (IMUs) and environmental sensors in UAV flight controllers. IC Role / Device Role / Timing Role: Dual-channel differential ADC acquiring synchronized gyro and accelerometer data with common-mode rejection >75 dB. Use Value: Maintains signal integrity in EMI-rich aircraft environments through differential input architecture and isolated power domains. | Use Scenario: Real-time torque and position feedback acquisition in servo-driven robotic arms with multi-axis coordinated motion. IC Role / Device Role / Timing Role: Four-channel single-ended ADC sampling motor current, encoder index, temperature, and supply voltage simultaneously. Use Value: Supports closed-loop bandwidths >1 kHz by delivering deterministic 8.7 µs conversion latency per channel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit multichannel ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8684IPWR | 16-bit resolution, 500ksps, integrated PGA, SPI interface, 24-QFN package | Higher resolution and speed but lacks ±16.5V input tolerance and multirange flexibility per channel | Select when absolute precision >12-bit ENOB is required and external overvoltage protection is acceptable |
| AD7949BCPZ-RL7 | 14-bit, 250ksps, 8-channel, no internal reference, 20-LFCSP package | Higher channel count and speed but requires external reference and offers only fixed ±VREF input range | Select for compact, high-density layouts where reference IC and protection circuitry are already present |
Compared with ADS8684IPWR and AD7949BCPZ-RL7, the MAX1033BEUP+ uniquely combines per-channel multirange programming, ±16.5V fault tolerance, and internal reference in a 20-pin TSSOP-making it optimal for ruggedized, cost-sensitive industrial I/O where design simplicity and field reliability are prioritized over raw speed or resolution.
Availability
MAX1033BEUP+ is available at Aetrix Electronics and suitable for industrial process monitoring, avionics sensor interfaces, and robotics joint control requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX1033BEUP+ 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 and mixed-signal ICs for industrial, automotive, and communications applications.
The MAX1033BEUP+ belongs to Maxim's high-accuracy, multirange SAR ADC product line engineered for robust data acquisition in electrically noisy, field-deployed systems where input protection, flexible range selection, and minimal external components are critical.
FAQ
What is the maximum sample rate of the MAX1033BEUP+?
The MAX1033BEUP+ achieves a maximum sample rate of 115 ksps in external clock mode with a 3.5 MHz SCLK. This throughput supports real-time acquisition of signals up to ~5 kHz while maintaining 84 dB SINAD, making it suitable for vibration monitoring and motor control feedback loops where timing determinism is essential.
Does the MAX1033BEUP+ include an internal voltage reference?
Yes, the MAX1033BEUP+ integrates a precision +4.096V bandgap reference with ±1% initial accuracy and ±30 ppm/°C temperature coefficient. When used with a 1.0 µF capacitor from REF to AGND1, it eliminates the need for an external reference IC-reducing bill-of-materials cost and PCB area in space-constrained industrial modules.
How many analog input channels does the MAX1033BEUP+ support?
The MAX1033BEUP+ supports four single-ended analog input channels (CH0–CH3) or two true-differential channels. Each channel is independently configurable for seven single-ended or three differential input voltage ranges-including ±3×VREF, ±6×VREF, and (±3×VREF)/2-enabling mixed-signal acquisition without external multiplexers or gain stages.
What package type is used for the MAX1033BEUP+?
The MAX1033BEUP+ is supplied in a 20-pin TSSOP package (5.0 mm × 6.5 mm, 0.65 mm pitch) with exposed thermal pad. This RoHS-compliant, lead-free package supports automated assembly and provides adequate thermal dissipation for continuous 115 ksps operation at +85°C ambient.
Is the MAX1033BEUP+ compatible with 3.3V microcontrollers?
Yes, the MAX1033BEUP+ features a separate DVDDO supply (2.7V to 5.25V) for its digital I/O pins, allowing direct interface with 3.3V microcontrollers without level shifters. The SPI/QSPI/MICROWIRE-compatible serial interface ensures firmware compatibility with standard peripheral libraries across ARM Cortex-M and legacy 8-bit platforms.
MAX1033BEUP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 115k
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-PGA-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 20-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1033BEUP+ FAQ
1.How can I place an order for MAX1033BEUP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1033BEUP+ 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 MAX1033BEUP+ reliable?
The price and inventory of MAX1033BEUP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1033BEUP+ is usually 5 days.
3.What payment methods are accepted for MAX1033BEUP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1033BEUP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1033BEUP+?
MAX1033BEUP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1033BEUP+ 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 MAX1033BEUP+?
For technical support, including MAX1033BEUP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1033BEUP+ requirements.
6.How does Aetrix verify that MAX1033BEUP+ is sourced from the original manufacturer or authorized distributors?
All MAX1033BEUP+ 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 MAX1033BEUP+ meets industry standards.
7.What is the process for return or replacement of MAX1033BEUP+?
All MAX1033BEUP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1033BEUP+, 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 MAX1033BEUP+ part is unused and in its original packaging.
Return procedure for MAX1033BEUP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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