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Analog Devices Inc./Maxim Integrated MAX1187BEUI+
- Part No.:
- MAX1187BEUI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX1187BEUI+.pdf
- Description:
- IC ADC 16BIT SAR 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:191
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Product details
Overview
MAX1187BEUI+ from Maxim Integrated is a 16-bit, 135ksps successive-approximation ADC with unipolar 0V to +10V analog input range, single +4.75V to +5.25V analog supply, and 16-bit parallel interface. It features ±2LSB INL, ±1LSB DNL, and 90dB SINAD at 1kHz - optimized for precision industrial data-acquisition systems requiring high DC accuracy and low power.
For engineers reviewing the MAX1187BEUI+ datasheet, MAX1187BEUI+ pinout, MAX1187BEUI+ application, or MAX1187BEUI+ equivalent, key selection criteria include its 0–10V input range compatibility, internal +4.096V reference option, AutoShutdown™ current reduction to 0.4mA at 10ksps, and TSSOP-28 package suitability for space-constrained I/O modules and sensor signal chains.
Technical Context
The MAX1187BEUI+ implements a SAR architecture with integrated track-and-hold and factory-trimmed internal clock, eliminating external timing components. Its input scaler enables true 0V to +10V unipolar operation from a single +5V analog rail without level-shifting circuitry.
Conversion control uses a three-edge CS protocol: first falling edge powers up and initiates acquisition (R/C low), second falling edge starts conversion and selects standby/shutdown mode via R/C, third falling edge loads data onto D0–D15 bus (R/C high). EOC asserts low upon completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1LSB = 152.6µV over 0–10V full-scale range |
| Sampling Rate | 135ksps maximum - supports real-time monitoring of fast transients in motor control feedback loops |
| INL / DNL | ±2LSB max / ±1LSB max - ensures monotonicity and <0.003% full-scale linearity error for calibration-critical instrumentation |
| Analog Input Range | 0V to +10V - directly interfaces with industrial 0–10V sensor outputs and PLC analog inputs without external scaling |
| Supply Current | 5.3mA (external ref) / 6.2mA (internal ref) at 135ksps - enables battery-powered portable test equipment with >24hr runtime on 2000mAh cells |
| AutoShutdown Current | 0.4mA at 10ksps - reduces average power by >85% during idle intervals in cyclic data logging |
| SINAD / THD | 90dB / –100dB at 1kHz - preserves dynamic range for high-fidelity vibration analysis and audio-grade signal capture |
Pinout & Package
MAX1187BEUI+ is housed in a 28-pin TSSOP package (4.4mm × 9.7mm, 0.65mm pitch), specified for –40°C to +85°C operation. Pin 1 is D8 (MSB-8), pin 28 is D7 (LSB-0); all digital outputs are three-state with DVDD-compatible voltage levels.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D15 | Parallel digital output bus | 16-bit three-state outputs synchronized to CS; D0 = LSB, D15 = MSB - direct connection to µP data bus without glue logic |
| R/C | Read/Convert mode control | Configures standby (R/C low) or shutdown (R/C high) after conversion - determines reference buffer power state and wake-up latency |
| CS | Convert start command | Three-edge active-low control: powers up, starts conversion, and latches result - eliminates need for external state machine |
| EOC | End-of-conversion flag | Active-low open-drain signal indicating valid data ready on D0–D15 - enables interrupt-driven µP polling |
| AIN | Analog input terminal | High-impedance (10kΩ min) unipolar input accepting 0–10V - internally scaled to match DAC range; no external op-amp required for basic applications |
| REF / REFADJ | Reference interface | REF = buffered +4.096V output (internal) or 3.8–4.2V input (external); REFADJ = reference adjust node - allows fine-tuning or external reference injection |
| AVDD / DVDD | Separate analog/digital supplies | AVDD = +4.75V to +5.25V; DVDD = +2.7V to +5.25V - enables mixed-voltage system integration (e.g., 3.3V µP with 5V analog front-end) |
Key Features
| Feature | Design Value |
|---|---|
| Unipolar 0–10V input range | Direct compatibility with industrial process sensors and legacy PLC analog I/O standards - eliminates external resistive dividers |
| Factory-trimmed internal reference | +4.096V ±0.98% (±40mV) over temperature - provides stable scaling without external precision reference ICs |
| 16-bit parallel interface | Full-word readout in one bus cycle - achieves minimum latency for closed-loop control where ADC-to-actuator delay must be <15µs |
| AutoShutdown™ mode | Reduces total supply current to 0.4mA at 10ksps - extends battery life in portable multimeters and handheld analyzers |
| Single +5V analog supply | Operates from standard 5V rail - simplifies power architecture in embedded systems with shared analog/digital regulators |
Applications
| Temperature Sensing and Monitoring | Industrial Process Control |
|---|---|
Use Scenario: High-accuracy measurement of RTD or thermocouple signals conditioned to 0–10V output in HVAC and chemical plant environments. IC Role / Device Role / Timing Role: Precision digitizer converting analog sensor voltage to 16-bit digital word for PLC or microcontroller processing. Use Value: ±2LSB INL ensures <0.003% full-scale error across –40°C to +85°C, enabling traceable calibration without field recalibration. | Use Scenario: Analog input module in distributed control systems acquiring pressure, flow, and level transmitter outputs. IC Role / Device Role / Timing Role: High-speed data acquisition node interfacing 0–10V industrial transmitters to backplane communication buses. Use Value: 135ksps sampling supports oversampling for noise reduction while maintaining deterministic update rates for PID loop execution. |
| I/O Modules | Data-Acquisition Systems |
Use Scenario: Compact DIN-rail mounted analog input card for OEM machinery with space-constrained enclosures. IC Role / Device Role / Timing Role: Core ADC in isolated 0–10V input channel with galvanic separation and local regulation. Use Value: TSSOP-28 footprint minimizes PCB area; separate AVDD/DVDD pins simplify layout isolation between analog and digital sections. | Use Scenario: Portable field test equipment capturing transient waveforms from motors, generators, and power electronics. IC Role / Device Role / Timing Role: Primary digitizer in battery-powered oscilloscope-style recorder with 16-bit resolution and 135ksps sustained rate. Use Value: 90dB SINAD and –100dB THD preserve harmonic content for FFT-based diagnostics of mechanical faults and electrical imbalances. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | 16-bit, 1MSPS, SPI interface, 2.5V supply, ±2.5V input range | Requires external level-shifting for 0–10V signals; higher speed but lower DC accuracy (±3.5LSB INL) | Choose for high-throughput systems needing serial interface and lower power at reduced linearity tolerance. |
| AD7606BSTZ | 16-bit, 200ksps, parallel/SPI, ±10V bipolar input, on-chip PGA and anti-alias filter | Supports bipolar ranges only; includes integrated analog front-end not present in MAX1187BEUI+ | Choose when simultaneous sampling of multiple channels or programmable gain is required, accepting larger footprint and higher cost. |
Compared with ADS8860IDRCT and AD7606BSTZ, the MAX1187BEUI+ uniquely combines 0–10V unipolar input, 16-bit parallel interface, and internal reference in a compact TSSOP-28 - making it optimal for cost-sensitive, space-constrained industrial I/O where simplicity and DC precision outweigh raw speed or multi-channel needs.
Availability
MAX1187BEUI+ is available at Aetrix Electronics and suitable for industrial process control, precision instrumentation, and portable data-acquisition systems requiring stable component supply across extended temperature ranges.
Supply support for MAX1187BEUI+ 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, medical, and communications applications.
The MAX1179/MAX1187/MAX1189 family was engineered specifically for high-accuracy, low-power data acquisition in battery-operated and space-constrained industrial systems - emphasizing DC precision, single-supply operation, and minimal external component count.
FAQ
What is the analog input voltage range supported by the MAX1187BEUI+?
The MAX1187BEUI+ supports a unipolar analog input range of 0V to +10V. This is distinct from the MAX1179 (±5V) and MAX1189 (±10V) variants in the same family. The input scaler enables direct interface with industrial 0–10V sensor outputs without external attenuation or level-shifting circuitry, and the device maintains ±2LSB INL across this full range.
Does the MAX1187BEUI+ include an internal voltage reference?
Yes, the MAX1187BEUI+ integrates a factory-trimmed +4.096V internal reference, accessible at the REF pin. When used, it contributes 6.2mA to total supply current at 135ksps. The reference can be adjusted via the REFADJ pin (±1.5% range) or disabled by connecting REFADJ to AVDD to enable external reference operation between 3.8V and 4.2V.
How does the AutoShutdown™ feature work on the MAX1187BEUI+?
AutoShutdown™ on the MAX1187BEUI+ is controlled by the R/C pin during the second falling edge of CS. Setting R/C high places the device into shutdown mode, reducing total supply current to 0.4mA at 10ksps. Recovery requires ≥12ms for the internal reference to settle before the next conversion achieves full 16-bit accuracy.
What package type and temperature grade is the MAX1187BEUI+?
The MAX1187BEUI+ is supplied in a 28-pin TSSOP package and is rated for the extended industrial temperature range of –40°C to +85°C. The 'E' in the part number denotes this extended grade, while 'B' indicates ±2LSB INL performance grade per the datasheet ordering table.
Can the MAX1187BEUI+ interface directly with a 3.3V microcontroller?
Yes, the MAX1187BEUI+ supports DVDD from +2.7V to +5.25V, allowing direct connection to 3.3V logic. Digital outputs (D0–D15, EOC) are three-state with VOH ≥ DVDD – 0.4V and VOL ≤ 0.4V, meeting 3.3V CMOS input thresholds. AVDD remains at +4.75V to +5.25V for analog section integrity.
MAX1187BEUI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 135k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 28-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1187BEUI+ FAQ
1.How can I place an order for MAX1187BEUI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1187BEUI+ 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 MAX1187BEUI+ reliable?
The price and inventory of MAX1187BEUI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1187BEUI+ is usually 5 days.
3.What payment methods are accepted for MAX1187BEUI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1187BEUI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1187BEUI+?
MAX1187BEUI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1187BEUI+ 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 MAX1187BEUI+?
For technical support, including MAX1187BEUI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1187BEUI+ requirements.
6.How does Aetrix verify that MAX1187BEUI+ is sourced from the original manufacturer or authorized distributors?
All MAX1187BEUI+ 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 MAX1187BEUI+ meets industry standards.
7.What is the process for return or replacement of MAX1187BEUI+?
All MAX1187BEUI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1187BEUI+, 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 MAX1187BEUI+ part is unused and in its original packaging.
Return procedure for MAX1187BEUI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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