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Analog Devices Inc./Maxim Integrated MAX1035EUP+
- Part No.:
- MAX1035EUP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX1035EUP+.pdf
- Description:
- IC ADC 14BIT SAR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,379
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Product details
Overview
MAX1035EUP+ from Maxim Integrated is a 4-channel (single-ended) or 2-channel (true differential), 14-bit successive-approximation ADC operating from a single +5V analog supply and supporting digital I/O at 2.7V–5.25V. It delivers up to 115ksps throughput, ±0.25LSB INL, ±6V overvoltage-tolerant inputs, and software-programmable input ranges including ±VREF, ±VREF/2, and ±2×VREF - enabling precision data acquisition in industrial sensor interfaces.
For engineers reviewing the MAX1035EUP+ datasheet, MAX1035EUP+ pinout, MAX1035EUP+ application, or MAX1035EUP+ equivalent, key selection criteria include its multirange bipolar input flexibility, internal +4.096V reference with ±30ppm/°C drift, SPI/QSPI/MICROWIRE-compatible serial interface, 20-pin TSSOP package, and -40°C to +85°C industrial temperature rating.
Technical Context
The MAX1035EUP+ 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 ranges. Its independent per-channel range programming is executed via an 8-bit configuration byte sent over the serial interface before conversion.
It features four isolated power domains (AVDD1/AGND1, AVDD2/AGND2, DVDD/DGND, DVDDO/DGNDO) to minimize noise coupling between analog signal path, preamplifier, digital logic, and I/O buffers - critical for maintaining >84dB SINAD at 5kHz input under full-scale conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit - delivers 16,384 discrete output codes for high-fidelity signal digitization |
| Max Sample Rate | 115ksps - supports real-time monitoring of fast transients in motor control or vibration sensing |
| INL (max) | ±1 LSB - ensures monotonicity and <0.006% full-scale linearity error across temperature |
| Input Voltage Ranges | Seven single-ended (e.g., 0V to +VREF, ±VREF/4) and three differential (±VREF/2, ±VREF, ±2×VREF) - enables direct interfacing to diverse sensors without external gain/level-shift |
| Reference | +4.096V internal reference (±1%) or external 3.800V–4.136V - eliminates need for external precision reference in space-constrained designs |
| Overvoltage Tolerance | ±6V on all analog inputs - protects against field-wiring faults and ESD in industrial PLCs and 4–20mA loop interfaces |
| Supply Current (typ) | 20mA total (AVDD2: 17.5mA, AVDD1: 3mA, DVDD: 0.9mA, DVDDO: 0.2mA) - optimized for low-power battery-backed DAQ systems |
Pinout & Package
The MAX1035EUP+ is housed in a 20-pin TSSOP package (4.4mm × 6.5mm, 0.65mm pitch) with exposed thermal pad. Pin assignments are validated per Maxim's MAX1034/MAX1035 datasheet Rev 2 (19-3574).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AGND1) | Analog Ground 1 | Main ADC negative reference node; must be tied to AGND2, AGND3, DGND, DGNDO at single point near device |
| 2–5 (CH0–CH3) | Analog Input Channels | Four single-ended or two true-differential inputs; each independently programmable for range and polarity |
| 7 (CS) | Active-Low Chip Select | Enables serial communication; high-Z DOUT when CS = high; required for frame synchronization |
| 8 (DIN) | Serial Data Input | Accepts 8-bit configuration byte and command bits on SCLK rising edge during CS low |
| 9 (SSTRB) | Serial Strobe Output | Rising edge indicates valid conversion result ready for readout in internal clock mode; always low in external clock mode |
| 10 (SCLK) | Serial Clock Input | Drives data transfer timing; supports 3.5MHz max frequency with 40–60% duty cycle |
| 11 (DOUT) | Serial Data Output | 14-bit conversion result shifted out MSB-first on SCLK falling edge during CS low |
| 12–13 (DGNDO, DGND) | Digital I/O and Logic Grounds | Separate ground returns for I/O buffer and core logic to prevent digital noise injection into analog section |
| 14–15 (DVDDO, DVDD) | Digital I/O and Core Supply | DVDDO powers I/O drivers (2.7–5.25V); DVDD powers digital logic (4.75–5.25V) - enables mixed-voltage system interfacing |
| 16–17 (REFCAP, REF) | Reference Control and Output | REFCAP selects internal/external reference mode; REF outputs +4.096V or accepts external 3.800–4.136V reference |
| 18–20 (AGND3, AVDD2, AGND2) | Preamplifier Power Domain | AVDD2/AGND2 supplies high-current analog front-end; AGND2 carries ~5× more current than AGND1 |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel software-programmable input range | Eliminates external gain-switching circuitry and allows dynamic reconfiguration of sensor channels in runtime |
| ±6V overvoltage tolerance on all analog inputs | Prevents latch-up and damage during hot-plug events or wiring errors in factory automation environments |
| Internal +4.096V reference with ±30ppm/°C drift | Provides stable, calibrated full-scale for 14-bit resolution without requiring external reference IC or trimming |
| Four independent power domains with dedicated grounds | Reduces inter-domain noise coupling to maintain >84dB SINAD in electrically noisy industrial settings |
| SPI-/QSPI-/MICROWIRE-compatible serial interface | Ensures drop-in compatibility with legacy microcontrollers (e.g., MC68HCxx) and modern ARM-based DAQ platforms |
Applications
| Industrial Process Monitoring | PLC Analog Input Modules |
|---|---|
Use Scenario: Continuous sampling of 4–20mA current-loop sensors measuring pressure, temperature, and flow in chemical plants. IC Role / Device Role / Timing Role: Primary ADC converting conditioned analog signals to 14-bit digital values synchronized to PLC scan cycle via SPI interface. Use Value: Software-selectable ±VREF/2 and ±VREF ranges match common transmitter output spans, eliminating external scaling resistors and reducing BOM count. | Use Scenario: Modular I/O card acquiring data from multiple field devices in distributed control systems. IC Role / Device Role / Timing Role: Multichannel ADC providing isolated, fault-tolerant analog inputs with channel-to-channel isolation >105dB. Use Value: ±6V input tolerance prevents system failure due to accidental 24VDC wiring faults, improving field reliability and reducing maintenance downtime. |
| Avionics Sensor Interfaces | Robotics Joint Position Feedback |
Use Scenario: Digitizing strain gauge and accelerometer outputs in flight control surface monitoring units. IC Role / Device Role / Timing Role: High-accuracy ADC capturing fast transients (up to 115ksps) with low aperture jitter (100ps) for vibration analysis. Use Value: 84.5dB SINAD at 5kHz enables detection of subtle mechanical anomalies below 0.1% full-scale amplitude. | Use Scenario: Reading absolute position from multi-turn potentiometers and resolvers in servo motor feedback loops. IC Role / Device Role / Timing Role: Precision ADC converting analog position signals to 14-bit digital words for closed-loop motion control algorithms. Use Value: Independent per-channel range programming allows simultaneous use of high-resolution ±VREF for resolver excitation and lower-range 0V–+VREF/2 for potentiometer wiper voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multirange 14-bit ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8684IPWR | 16-bit resolution, 500ksps, integrated PGA, single-supply 4.75–5.25V, no internal reference | Higher resolution and speed but requires external reference and lacks ±6V fault tolerance | Select when >14-bit ENOB and faster sampling are mandatory; accept added BOM complexity for reference and protection circuitry |
| AD7949BCPZ-RL7 | 14-bit, 250ksps, 8-channel, SPI interface, ±0.5LSB INL, no internal reference, 3.3V/5V dual supply | Higher sample rate and channel count but no overvoltage protection or internal reference | Choose for high-throughput multiplexed systems where external reference and TVS protection are already implemented |
Compared with ADS8684IPWR and AD7949BCPZ-RL7, the MAX1035EUP+ uniquely integrates ±6V input tolerance and a trimmed +4.096V reference in a 20-pin TSSOP, reducing layout area and qualification effort for ruggedized industrial DAQ designs - at the trade-off of lower maximum throughput.
Availability
MAX1035EUP+ is available at Aetrix Electronics and suitable for industrial process monitoring, PLC analog input modules, and avionics sensor interfaces requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MAX1035EUP+ 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, automotive, and communications applications.
The MAX1034/MAX1035 product line targets high-accuracy, low-power data acquisition in electrically noisy environments - emphasizing multirange flexibility, fault tolerance, and simplified system integration via integrated reference and quad-supply architecture.
FAQ
What is the maximum sample rate supported by the MAX1035EUP+?
The MAX1035EUP+ achieves a maximum throughput rate of 115ksps in external clock mode with a 3.5MHz SCLK. This rate is sustained across all input ranges and temperature conditions (-40°C to +85°C), making it suitable for real-time vibration monitoring and motor current sampling. The MAX1035EUP+ maintains specified AC performance (≥84dB SINAD) at this rate when using the ±VREF differential input range.
Does the MAX1035EUP+ include an internal voltage reference?
Yes, the MAX1035EUP+ integrates a precision +4.096V bandgap reference with ±1% initial accuracy and ±30ppm/°C temperature coefficient. When REFCAP is bypassed to AGND1 with a 0.01µF capacitor, the internal reference activates automatically. This eliminates the need for external reference components in most industrial DAQ applications, simplifying design and reducing board space.
How many analog input channels does the MAX1035EUP+ support?
The MAX1035EUP+ supports four single-ended analog input channels (CH0–CH3) or two true-differential channels. Each channel is independently configurable for input range and polarity via an 8-bit software command. Unlike the MAX1034EUG+, the MAX1035EUP+ does not support CH4–CH7, confirming its 4-channel identity per Maxim's ordering table and pin configuration diagrams.
What package type is used for the MAX1035EUP+?
The MAX1035EUP+ is supplied in a 20-pin TSSOP package (4.4mm × 6.5mm body, 0.65mm lead pitch) with RoHS-compliant, lead-free finish. This compact surface-mount package supports automated assembly and provides adequate thermal dissipation (1084mW at +70°C) for industrial ambient conditions. Pinout is distinct from the 24-pin TSSOP used by the MAX1034EUG+.
Can the MAX1035EUP+ interface directly with 3.3V microcontrollers?
Yes, the MAX1035EUP+ supports direct interfacing with 3.3V microcontrollers via its DVDDO pin, which accepts 2.7V–5.25V digital I/O supply. When DVDDO = 3.3V, the DOUT and SSTRB outputs swing rail-to-rail between 0V and 3.3V, and the DIN, SCLK, and CS inputs recognize 3.3V logic levels - enabling seamless SPI communication without level-shifting circuitry.
MAX1035EUP+ 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:
- -
MAX1035EUP+ FAQ
1.How can I place an order for MAX1035EUP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1035EUP+ 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 MAX1035EUP+ reliable?
The price and inventory of MAX1035EUP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1035EUP+ is usually 5 days.
3.What payment methods are accepted for MAX1035EUP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1035EUP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1035EUP+?
MAX1035EUP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1035EUP+ 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 MAX1035EUP+?
For technical support, including MAX1035EUP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1035EUP+ requirements.
6.How does Aetrix verify that MAX1035EUP+ is sourced from the original manufacturer or authorized distributors?
All MAX1035EUP+ 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 MAX1035EUP+ meets industry standards.
7.What is the process for return or replacement of MAX1035EUP+?
All MAX1035EUP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1035EUP+, 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 MAX1035EUP+ part is unused and in its original packaging.
Return procedure for MAX1035EUP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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