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Analog Devices Inc./Maxim Integrated MAX1189BEUI+
- Part No.:
- MAX1189BEUI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX1189BEUI+.pdf
- Description:
- IC ADC 16BIT SAR 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,999
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Product details
Overview
MAX1189BEUI+ from Maxim Integrated is a 16-bit, 135ksps successive-approximation ADC with ±10V bipolar analog input range, single +4.75V to +5.25V analog supply, and 16-bit parallel interface. It features ±2LSB INL (max), -100dB THD, and operates over -40°C to +85°C in a 28-pin TSSOP package - ideal for precision industrial process control and high-accuracy data-acquisition systems.
For engineers reviewing the MAX1189BEUI+ datasheet, MAX1189BEUI+ pinout, MAX1189BEUI+ application, or MAX1189BEUI+ equivalent, key selection factors include its ±10V input range, internal +4.096V reference (±35ppm/°C tempco), AutoShutdown™ mode (0.5µA typ), 4.7µs conversion time, and compatibility with +2.7V to +5.25V digital logic interfaces.
Technical Context
The MAX1189BEUI+ employs a SAR architecture with integrated track-and-hold and factory-trimmed internal clock, eliminating external timing components. Its input scaler enables true ±10V bipolar operation from a single +5V analog supply while limiting input current to ±1.8mA.
Power management is controlled via R/C pin sequencing: second CS falling edge selects standby (reference on, 3.7mA) or shutdown (reference off, 0.5µA); third CS falling edge with R/C high loads valid 16-bit data onto D0–D15 bus. EOC signals conversion completion, and RESET provides synchronous initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1 LSB = ±10V / 65536 ≈ 305µV step size for full-scale precision |
| Sampling Rate | 135ksps - supports real-time capture of signals up to ~67kHz Nyquist bandwidth |
| INL (max) | ±2LSB - ensures monotonicity and <0.003% full-scale linearity error across temperature |
| THD | -100dB - enables clean spectral performance in instrumentation-grade signal chains |
| Analog Supply | +4.75V to +5.25V - compatible with standard 5V rails; AVDD bypassing requires 0.1µF + bulk capacitor |
| Digital Logic Interface | +2.7V to +5.25V - interoperable with modern microcontrollers and FPGAs without level-shifting |
| Internal Reference | +4.096V ±0.04V (±35ppm/°C) - calibrated for exact 16-bit scaling (65536 steps per 4.096V) |
Pinout & Package
MAX1189BEUI+ is housed in a 28-pin Thin Shrink Small Outline Package (TSSOP), 4.4mm × 9.7mm body, 0.65mm pitch, exposed pad optional. Thermal resistance θJA = 78°C/W (JEDEC Std). Fully specified from -40°C to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| D0–D15 | Three-state parallel data outputs (LSB to MSB) | High-impedance during acquisition/conversion; driven only after third CS edge with R/C high |
| R/C | Read/Convert control input | Configures power-down mode (standby vs. shutdown) on second CS edge; enables data output on third CS edge |
| EOC | End-of-conversion flag | Active-low open-drain output signaling valid data ready; synchronizes µP read timing |
| CS | Convert start command | Falling-edge-triggered: first powers up, second starts conversion, third loads data |
| AIN | Analog input terminal | Accepts ±10V differential-to-ground; input impedance 6kΩ (normal), 10kΩ (shutdown); protected to ±16.5V |
| REF / REFADJ | Reference input/output and adjustment node | REF = buffered +4.096V output (bypass 10µF); REFADJ = reference buffer output (bypass 0.1µF); connect REFADJ to AVDD for external reference mode |
| AVDD / DVDD | Analog and digital supply inputs | Separate supplies allow independent noise isolation; AGND/DGND must be star-connected near device |
| RESET | Asynchronous reset input | Logic-high pulse resets internal state; required before first conversion after power-up or shutdown wake-up |
Key Features
| Feature | Design Value |
|---|---|
| ±10V Bipolar Input Range | Enables direct connection to industrial sensors (e.g., strain gauges, RTDs with excitation) without external op-amp level-shifting |
| AutoShutdown™ Mode | Reduces total supply current to 0.5µA (typ) between conversions - extends battery life in portable DAQ systems |
| Factory-Trimmed Internal Clock | Eliminates need for external crystal or oscillator; guarantees 4.7µs max conversion time at 135ksps without timing calibration |
| Offset Binary Coding (MAX1189) | Output format maps -10V → 0x0000, 0V → 0x8000, +10V → 0xFFFF - simplifies signed arithmetic in µP firmware |
| Input Scaler Architecture | Internally attenuates/shifts ±10V input to match DAC range; maintains 16-bit accuracy while protecting core circuitry |
Applications
| Industrial Process Control | Precision Instrumentation |
|---|---|
Use Scenario: Monitoring pressure, flow, and temperature in PLC I/O modules with 4–20mA loop receivers and sensor front-ends. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog signals; synchronized via CS/EOC handshake with host controller. Use Value: ±2LSB INL and -100dB THD ensure <0.003% measurement uncertainty across 0–100% span, meeting SIL-2 functional safety requirements. | Use Scenario: High-resolution waveform capture in portable oscilloscopes and spectrum analyzers with DC-coupled inputs. IC Role / Device Role / Timing Role: Front-end digitizer sampling at 135ksps with deterministic 4.7µs conversion latency for trigger-aligned acquisition. Use Value: 90dB SINAD and 103dB SFDR enable clean 14.5 ENOB at 1kHz, supporting sub-mV resolution on ±10V full scale. |
| Data-Acquisition Systems | Medical Sensor Interfaces |
Use Scenario: Modular DAQ cards for test benches capturing multi-channel voltage, thermocouple, and bridge outputs. IC Role / Device Role / Timing Role: Channel-sampled ADC with parallel bus interface; coordinated via shared CS/R/C lines across multiple devices. Use Value: 16-bit parallel interface reduces µP overhead vs. SPI/I²C; ±10V range accommodates unipolar/bipolar transducers without reconfiguration. | Use Scenario: Patient monitoring equipment digitizing ECG, EEG, and bioimpedance signals requiring DC accuracy and low distortion. IC Role / Device Role / Timing Role: Precision analog front-end ADC; referenced to stable internal 4.096V source for consistent gain calibration. Use Value: ±35ppm/°C reference tempco and 16µV/°C offset drift maintain calibration integrity over clinical operating temperatures (-10°C to +50°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision, bipolar-input ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | 16-bit, 1MSPS SAR ADC; SPI interface; ±5V input range; external reference only; no internal scaler | Requires external op-amp for ±10V input; higher speed but no AutoShutdown™; needs separate clock generation | Select when system demands >135ksps sampling or SPI bus integration; avoid if ±10V direct input or ultra-low quiescent current is required. |
| AD7606BSTZ | 16-bit, 200ksps simultaneous-sampling octal ADC; ±10V input; internal reference; parallel/SPI interface | 8-channel sync sampling; larger 64-lead LQFP package; higher power (120mW); no AutoShutdown™ | Select for multi-channel synchronized acquisition (e.g., motor phase currents); not suitable for space-constrained single-channel designs. |
Compared with ADS8860IDRCT and AD7606BSTZ, the MAX1189BEUI+ uniquely combines ±10V direct input, internal scaler, AutoShutdown™ (0.5µA), and 16-bit parallel interface in a compact 28-pin TSSOP - optimizing for low-power, single-channel, high-accuracy industrial DAQ where board space and supply efficiency are critical.
Availability
MAX1189BEUI+ is available at Aetrix Electronics and suitable for industrial process control, precision instrumentation, and medical sensor interface applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MAX1189BEUI+ 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 systems.
The MAX1179/MAX1187/MAX1189 family was engineered specifically for high-accuracy, low-power, single-supply data acquisition - delivering 16-bit resolution with ±10V input capability and integrated reference in minimal footprint.
FAQ
What is the maximum sampling rate of the MAX1189BEUI+?
The MAX1189BEUI+ achieves a maximum sampling rate of 135ksps, corresponding to a minimum conversion period of approximately 7.4µs. This includes 2µs acquisition time and 4.7µs conversion time. At this rate, the device consumes 5.3mA (external reference) or 6.2mA (internal reference) from AVDD+DVDD, making it suitable for real-time monitoring of signals below 67kHz Nyquist frequency.
Does the MAX1189BEUI+ support ±10V analog input directly?
Yes, the MAX1189BEUI+ supports ±10V bipolar analog input directly via its internal input scaler - no external op-amp or level-shifting circuitry is required. The scaler attenuates and shifts the input to match the internal DAC range while maintaining 16-bit accuracy. Input protection extends to ±16.5V, and input current remains within ±1.8mA across the full range.
How does the AutoShutdown™ feature work on the MAX1189BEUI+?
The MAX1189BEUI+ enters AutoShutdown™ mode when R/C is held high during the second falling edge of CS. This powers down the internal reference and buffer, reducing total supply current to 0.5µA (typ). After shutdown, 12ms is required for the reference to settle before the next conversion achieves 16-bit accuracy - a timing constraint managed by firmware or hardware sequencing.
What reference voltage options does the MAX1189BEUI+ support?
The MAX1189BEUI+ supports both internal and external reference modes. Internally, it provides a trimmed +4.096V reference (±35ppm/°C) at REF, adjustable via REFADJ. Externally, a 3.8V–4.2V reference can be applied to REF (with REFADJ tied to AVDD) or to REFADJ (buffered input). External references must drive ≤10Ω source impedance and ≥100µA load.
Is the MAX1189BEUI+ pin-compatible with other devices in the MAX1179/MAX1187/MAX1189 family?
Yes, the MAX1189BEUI+ shares identical pinout, package (28-pin TSSOP), and interface protocol with MAX1179 and MAX1187. Differences lie solely in input range (±10V vs. ±5V or 0–10V) and transfer function coding (offset binary for MAX1189 vs. standard binary for MAX1187). Firmware must account for range and code format, but PCB layout and interconnect remain unchanged.
MAX1189BEUI+ 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:
- -
MAX1189BEUI+ FAQ
1.How can I place an order for MAX1189BEUI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1189BEUI+ 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 MAX1189BEUI+ reliable?
The price and inventory of MAX1189BEUI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1189BEUI+ is usually 5 days.
3.What payment methods are accepted for MAX1189BEUI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1189BEUI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1189BEUI+?
MAX1189BEUI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1189BEUI+ 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 MAX1189BEUI+?
For technical support, including MAX1189BEUI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1189BEUI+ requirements.
6.How does Aetrix verify that MAX1189BEUI+ is sourced from the original manufacturer or authorized distributors?
All MAX1189BEUI+ 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 MAX1189BEUI+ meets industry standards.
7.What is the process for return or replacement of MAX1189BEUI+?
All MAX1189BEUI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1189BEUI+, 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 MAX1189BEUI+ part is unused and in its original packaging.
Return procedure for MAX1189BEUI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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