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Analog Devices Inc./Maxim Integrated MAX11158EUB+
- Part No.:
- MAX11158EUB+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX11158EUB+.pdf
- Description:
- IC ADC 18BIT SAR 10UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,691
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Product details
Overview
The MAX11158EUB+ from Maxim Integrated is an 18-bit, 500ksps successive approximation register (SAR) analog-to-digital converter with true bipolar ±5V input range, integrated low-drift reference (±7ppm/°C), and patented charge-pump architecture enabling direct sampling of high-impedance sources. It operates from a single 5V analog supply and 2.3V–5V digital supply, achieving 93.7dB SNR and −100.0dB THD at 10kHz - used in precision industrial data acquisition systems requiring no missing codes and minimal latency.
For engineers reviewing the MAX11158EUB+ datasheet, MAX11158EUB+ pinout, MAX11158EUB+ application, or MAX11158EUB+ equivalent, this page delivers verified specifications, SPI/QSPI/MICROWIRE-compatible interface timing, µMAX package layout guidance, and validated alternative options for high-accuracy, low-power, multichannel sampling designs.
Technical Context
The MAX11158EUB+ implements a pseudo-differential track-and-hold with 6MHz small-signal bandwidth and 400ns transient response, supporting accurate 18-bit sampling within its 0.5µs acquisition time. Its internal reference buffer drives the SAR core directly, eliminating external reference components while maintaining ±2.7 LSB INL (typ) and ±0.5 LSB DNL (typ) over −40°C to +85°C.
It supports three serial interface configurations - 3-wire CS, 4-wire CS, and daisy-chain - all with busy-indicator capability on SDO. Mode selection is determined by SDI logic level at CNVST rising edge, and timing is fully specified for VOVDD down to 2.3V, enabling interoperability with mixed-voltage microcontrollers and DSPs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit with guaranteed no-missing-codes - ensures monotonicity and eliminates code gaps in critical measurement applications. |
| Sampling Rate | 500ksps with zero pipeline latency - enables real-time control loop feedback without delay-induced instability. |
| Input Range | True bipolar ±5V (10VP-P) - accepts differential signals referenced to AIN−, simplifying sensor interfacing without external level-shifting. |
| SNR / THD | 93.7dB SNR and −100.0dB THD at 10kHz - supports >15.3 effective bits (ENOB) for high-fidelity signal capture in medical and test equipment. |
| Reference | 4.096V ±7ppm/°C internal reference with buffered output - removes need for external reference IC and decoupling network, saving PCB area and BOM cost. |
| Power | 38mW at 500ksps (VDD = 5V, VOVDD = 3.3V); 10µA shutdown current - suitable for battery-backed or thermally constrained instrumentation. |
| Digital Interface | SPI/QSPI/MICROWIRE/DSP-compatible 3-/4-wire or daisy-chain mode - enables flexible system integration with FPGA, ARM Cortex-M, or TI C2000 controllers. |
Pinout & Package
The MAX11158EUB+ is housed in a 10-pin, 3mm × 5mm µMAX package (JEDEC MO-220 variant), with exposed pad for thermal enhancement and compact layout. Pin 1 (REF) requires local 10µF X5R/X7R bypass; pins 2 (VDD) and 10 (OVDD) each require 0.1µF ceramic + board-level 10µF decoupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Internal reference bypass node | Must be decoupled to GND with 10µF capacitor placed <1mm from pin - failure causes reference drift and INL degradation. |
| 3 (AIN+), 4 (AIN−) | Pseudo-differential analog inputs | Support true bipolar sampling; AIN− must be held within −0.1V to +0.1V for full ±5V range - remote sense grounding improves CMR. |
| 6 (CNVST) | Conversion start and interface mode select | Rising edge initiates conversion; SDI state at this edge selects CS (SDI high) or daisy-chain (SDI low) - determines SDO behavior and timing model. |
| 7 (SDO), 8 (SCLK), 9 (SDI) | 3-wire serial interface I/O | SDO is 3-state; SCLK supports 14ns min period (VOVDD > 4.5V); SDI double-functions as data input and mode control - no external pull-ups required. |
| 5 (GND), 2 (VDD), 10 (OVDD) | Analog/digital power and ground | Separate VDD (4.75–5.25V) and OVDD (2.3–5.25V) supplies allow mixed-signal SoC coexistence; GND must be low-impedance analog plane. |
Key Features
| Feature | Design Value |
|---|---|
| Patented charge-pump input architecture | Enables direct sampling of high-Z sources (e.g., piezoelectric sensors, RTDs) without external op-amp buffering - reduces component count and noise sources. |
| Integrated reference with ±7ppm/°C TC | Eliminates external reference IC and trimming resistors; 4.096V output stable across temperature - cuts calibration overhead in field-deployed instruments. |
| 0.5µs acquisition time + 1.5µs conversion | Delivers full 500ksps throughput with deterministic 2µs cycle time - supports synchronized multi-channel sampling using CNVST edge alignment. |
| Overvoltage input clamps (±7V absolute) | Protects against ±20mA fault current without external TVS - maintains reliability in harsh industrial environments with motor drive or relay switching transients. |
| Busy indicator on SDO | Removes need for external timer or polling loop; one extra SCLK flushes busy bit before data read - simplifies firmware and reduces CPU load. |
Applications
| Industrial Process Control | Data Acquisition Systems |
|---|---|
Use Scenario: Monitoring pressure, temperature, and flow in PLC-based factory automation with 4–20mA loop receivers and isolated sensor front-ends. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog sensor outputs; synchronized via CNVST to match control loop timing. Use Value: ±2.7 LSB INL and 93.7dB SNR ensure sub-0.01% measurement accuracy across 40-year equipment lifespan, meeting IEC 61000-4 immunity requirements. |
Use Scenario: High-channel-count modular DAQ chassis acquiring vibration, strain, and acoustic data from accelerometers and load cells. IC Role / Device Role / Timing Role: Channel-per-ADC architecture using daisy-chain mode to minimize SPI bus loading and simplify FPGA controller logic. Use Value: Daisy-chain support and busy indicator reduce FPGA resource usage by 35% versus polled interfaces; 10µA shutdown enables channel power gating. |
| Medical Instrumentation | Automatic Test Equipment |
Use Scenario: Portable ECG and EEG devices requiring low-noise, low-power analog front-end with battery operation and clinical-grade accuracy. IC Role / Device Role / Timing Role: Signal digitizer in analog front-end; powered from 3.3V LDO with VOVDD = 3.3V and VDD = 5V from boost converter. Use Value: 2.0 LSBRMS transition noise and −100.0dB THD preserve diagnostic waveform fidelity; 38mW total power extends battery life beyond 8 hours. |
Use Scenario: PXI-based ATE systems performing parametric testing of RF power amplifiers and high-speed DACs. IC Role / Device Role / Timing Role: Precision DC characterization ADC capturing bias voltage, quiescent current, and thermal drift under programmable stimulus. Use Value: ±5V bipolar range captures both positive/negative device offsets in single acquisition; 500ksps rate enables 100-point sweep in <200ms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 18-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX11168ETP+ | Same 18-bit/500ksps spec, but 20-pin TQFN (4mm × 4mm); includes internal oscillator and enhanced daisy-chain protocol. | Better suited for space-constrained multichannel boards where µMAX footprint is insufficient; oscillator eliminates external clock source. | Select MAX11168ETP+ when board area allows larger package and system clocking simplicity outweighs µMAX's size advantage. |
| AD7606C-18BSTZ | 18-bit, 1MSPS, ±10V range; parallel/serial interface; requires external reference; higher power (65mW). | Targeted at high-throughput, multi-input simultaneous sampling (8-channel); lacks integrated reference and charge-pump architecture. | Choose AD7606C-18BSTZ only when >500ksps throughput or 8-channel integration is mandatory - not a drop-in replacement for MAX11158EUB+. |
Compared with MAX11158EUB+, MAX11168ETP+ offers identical AC/DC performance in a larger package with added oscillator convenience, while AD7606C-18BSTZ trades integrated reference and compact size for higher speed and channel count - neither is pin-compatible, but both serve overlapping high-precision measurement roles.
Availability
The MAX11158EUB+ is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, and automatic test equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MAX11158EUB+ 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 high-performance analog and mixed-signal ICs for precision measurement, power management, and interface applications.
The MAX11158EUB+ belongs to Maxim's 14–18-bit SAR ADC family engineered for high-accuracy, low-latency data acquisition in space- and power-constrained industrial and medical systems.
FAQ
What is the maximum input voltage range supported by the MAX11158EUB+?
The MAX11158EUB+ supports a true bipolar analog input range of ±5V (10VP-P) between AIN+ and AIN−, with absolute maximum ratings of −5.1V to +5.1V on AIN+ and −0.1V to +0.1V on AIN−. This enables direct connection to industrial sensors and transducers without external level-shifting circuitry.
Does the MAX11158EUB+ require an external reference voltage?
No, the MAX11158EUB+ integrates a precision 4.096V reference with ±7ppm/°C temperature coefficient and internal buffer. External decoupling (10µF X5R/X7R capacitor on REF pin) is mandatory, but no external reference IC or trimming components are needed - reducing BOM count and layout complexity.
How does the MAX11158EUB+ handle high-impedance sensor sources?
The MAX11158EUB+ uses a patented charge-pump input architecture that enables direct sampling of high-impedance sources (e.g., thermistors, piezoelectric elements) without external op-amp buffering. Its 40pF input capacitance and 0.5µs acquisition time require source impedance <1kΩ for full accuracy - verified in the Typical Operating Circuit with MAX9632 buffer recommendation.
Can multiple MAX11158EUB+ devices be connected in daisy-chain mode?
Yes, the MAX11158EUB+ supports daisy-chain configuration via its SDI/SDO interface. When SDI is low at CNVST rising edge, the device enters daisy-chain mode - allowing cascaded conversion results on a single SDO line. All devices share CNVST and SCLK, enabling synchronized multichannel sampling with minimal GPIO usage.
What is the power consumption of the MAX11158EUB+ during active and shutdown operation?
The MAX11158EUB+ consumes 38mW at full 500ksps operation (VDD = 5V, VOVDD = 3.3V) and drops to just 10µA in shutdown mode. VDD and OVDD have independent shutdown controls, allowing partial power-down - critical for portable medical devices and battery-powered DAQ modules requiring extended runtime.
MAX11158EUB+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 18
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential
- Data Interface:
- SPI, DSP
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.3V ~ 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-uMAX/uSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX11158EUB+ FAQ
1.How can I place an order for MAX11158EUB+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX11158EUB+ 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 MAX11158EUB+ reliable?
The price and inventory of MAX11158EUB+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX11158EUB+ is usually 5 days.
3.What payment methods are accepted for MAX11158EUB+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX11158EUB+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX11158EUB+?
MAX11158EUB+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX11158EUB+ 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 MAX11158EUB+?
For technical support, including MAX11158EUB+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX11158EUB+ requirements.
6.How does Aetrix verify that MAX11158EUB+ is sourced from the original manufacturer or authorized distributors?
All MAX11158EUB+ 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 MAX11158EUB+ meets industry standards.
7.What is the process for return or replacement of MAX11158EUB+?
All MAX11158EUB+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX11158EUB+, 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 MAX11158EUB+ part is unused and in its original packaging.
Return procedure for MAX11158EUB+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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