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Analog Devices Inc./Maxim Integrated MAX189AEWE+
- Part No.:
- MAX189AEWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX189AEWE+.pdf
- Description:
- IC ADC 12BIT SAR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,580
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Product details
Overview
MAX189AEWE+ from Maxim Integrated is a 12-bit successive-approximation analog-to-digital converter (ADC) designed for low-power, single-supply +5V operation with external reference support. It delivers 75ksps throughput, ±½ LSB integral nonlinearity (A-grade), 4.5MHz small-signal bandwidth, and 3-wire SPI/QSPI/MICROWIRE-compatible serial interface - enabling precision data acquisition in space-constrained sensor nodes and isolated industrial monitoring systems.
For engineers reviewing the MAX189AEWE+ datasheet, MAX189AEWE+ pinout, MAX189AEWE+ application, or MAX189AEWE+ equivalent, key selection considerations include its external-reference architecture (2.5V to VDD), 1.0–2.0mA operating current, 8-pin SO package, shutdown mode (2µA), and unipolar 0–VREF input range - all critical for battery-powered or thermally sensitive embedded designs.
Technical Context
The MAX189AEWE+ implements an 8.5-clock-cycle SAR architecture with integrated track/hold, acquiring signals in 1.5µs and completing conversion in ≤8.5µs. Its analog front-end accepts 0–VREF inputs (VREF = 2.5V to VDD), features 16pF input capacitance, and supports anti-aliasing via external filtering due to 4.5MHz small-signal bandwidth and 0.8MHz full-power bandwidth.
Digital control uses three dedicated pins: CS (active-low chip select initiating conversion on falling edge), SCLK (up to 5MHz serial clock), and DOUT (MSB-first unipolar output with EOC high pulse). The device operates in two states - normal (CS-driven conversion) and shutdown (SHDN low, <10µA supply current) - with no internal reference circuitry, requiring external 2.5–5.25V reference at REF pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes over full-scale input range. |
| Integral Nonlinearity | ±½ LSB (A-grade) - ensures monotonicity and <0.012% full-scale error after calibration. |
| Throughput Rate | 75ksps - supports real-time sampling of signals up to 37.5kHz (Nyquist-limited). |
| Supply Current | 1.0–2.0mA (operating), 2µA (shutdown) - enables >1-year battery life in intermittent-sampling applications. |
| Reference Input Range | 2.50V to VDD (+5.25V max) - allows flexible system-level reference sourcing (e.g., precision bandgap or DAC output). |
| Small-Signal Bandwidth | 4.5MHz - permits accurate digitization of fast transients and undersampling of higher-frequency signals. |
| SINAD | 70dB @ 10kHz - corresponds to ~11.4 effective bits, suitable for medium-fidelity sensor signal chains. |
Pinout & Package
MAX189AEWE+ is housed in a 16-pin wide SO (SOIC-W) package with exposed pad (not electrically connected), measuring 10.3mm × 7.5mm × 2.65mm. Pin 1 is marked by notch or dot; pin numbering follows standard SOIC convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Positive supply rail | +5V ±5% main power input; decoupling capacitor required near pin. |
| AIN (Pin 3) | Analog input | 0–VREF unipolar sampling node; 16pF input capacitance requires low-impedance drive (<5kΩ source). |
| SHDN (Pin 6) | Three-state shutdown control | Pull low to enter <10µA shutdown; floating or high enables operation (no internal reference activation). |
| REF (Pin 8) | External reference input | Accepts 2.5V–VDD reference voltage; must be bypassed with ≥0.1µF ceramic capacitor for stability. |
| AGND (Pin 10) | Analog ground | Return path for analog circuitry; separate from DGND to minimize noise coupling into conversion path. |
| DGND (Pin 11) | Digital ground | Return path for digital I/O; connects to system digital ground plane. |
| DOUT (Pin 12) | Serial data output | Three-state MSB-first output; transitions on SCLK falling edge; high-impedance when CS is high. |
| CS (Pin 15) | Active-low chip select | Falling edge initiates conversion; rising edge disables DOUT and resets interface state. |
| SCLK (Pin 16) | Serial clock input | Drives data shift-out timing; supports 0–5MHz rates; duty cycle unrestricted if ≥100ns per phase. |
Key Features
| Feature | Design Value |
|---|---|
| Single +5V supply operation | Eliminates dual-rail or charge-pump requirements, simplifying power design in portable and industrial systems. |
| External reference flexibility | Supports 2.5V–VDD reference voltages, enabling system-level accuracy optimization and shared reference architectures. |
| 3-wire SPI/QSPI/MICROWIRE compatibility | Direct interfacing to microcontrollers without level-shifting or protocol translation logic. |
| 1.5µs track/hold acquisition time | Reduces minimum inter-conversion interval, improving effective sampling efficiency in burst-mode acquisition. |
| 75ksps throughput with 70dB SINAD | Meets dynamic performance requirements for vibration monitoring, audio pre-processing, and motor current sensing. |
Applications
| Portable Data Logging | Remote Digital Signal Processing |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure at 10–100Hz intervals. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog outputs from precision sensors before storage or wireless transmission. Use Value: 2µA shutdown current extends battery life; 12-bit resolution captures sub-0.1% changes; SO package minimizes PCB footprint. |
Use Scenario: Edge-node DSP module in distributed industrial control, performing real-time FFT analysis on motor current waveforms. IC Role / Device Role / Timing Role: High-fidelity analog front-end feeding sampled data to FPGA or DSP for spectral analysis. Use Value: 75ksps rate supports 37.5kHz Nyquist bandwidth; 70dB SINAD preserves signal integrity for harmonic detection. |
| Isolated Data Acquisition | High-Accuracy Process Control |
Use Scenario: Opto-isolated analog input card acquiring 4–20mA loop signals in PLC backplanes with >3kV isolation. IC Role / Device Role / Timing Role: Isolated-side ADC converting field signals prior to digital isolation barrier transmission. Use Value: External reference allows precise scaling to 4–20mA range; 16pF input capacitance eases op-amp driver selection. |
Use Scenario: Closed-loop temperature controller using RTD or thermocouple inputs with <0.1°C accuracy requirement. IC Role / Device Role / Timing Role: Precision measurement ADC providing feedback to PID algorithm running on host MCU. Use Value: ±½ LSB INL ensures linearity across full scale; 4.5MHz bandwidth accommodates fast thermal transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7816U | Pin-compatible 12-bit SAR ADC; 100ksps throughput; internal reference only; 2.7–5.25V supply range. | Requires internal reference redesign; better suited for fixed-VREF systems without external reference routing. | Select when board space is constrained and reference sharing is not needed; verify layout compatibility with SO-16 footprint. |
| MAX11131AUT+T | 12-bit SAR ADC; 1MSPS throughput; SPI-only interface; integrated reference buffer; 2.7–3.6V supply. | Higher speed but incompatible supply voltage; unsuitable for +5V-only systems without level-shifting. | Choose for high-speed, low-voltage applications where 5V operation is not required and faster sampling is critical. |
Compared with MAX189AEWE+, ADS7816U offers higher speed but removes external reference flexibility, while MAX11131AUT+T demands lower supply voltage and lacks 5V compatibility - making MAX189AEWE+ the optimal choice for +5V systems requiring reference scalability and industrial-grade linearity.
Availability
MAX189AEWE+ is available at Aetrix Electronics and suitable for portable data logging, remote digital signal processing, and isolated data acquisition requiring stable component supply, long-term manufacturability, and guaranteed traceable sourcing.
Supply support for MAX189AEWE+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX187/MAX189 product line was engineered for low-power, high-accuracy data acquisition in space- and energy-constrained environments - emphasizing ease of integration, minimal external components, and robust serial interface compatibility.
FAQ
What is the reference voltage requirement for MAX189AEWE+?
The MAX189AEWE+ requires an external reference voltage applied to the REF pin within 2.50V to VDD (max +5.25V). It does not include an internal reference. For optimal accuracy, the reference must deliver ≤350µA DC load current and exhibit ≤10Ω output impedance; a 0.1µF ceramic bypass capacitor is mandatory at the REF pin.
Does MAX189AEWE+ support SPI, QSPI, and MICROWIRE interfaces?
Yes, MAX189AEWE+ is fully compatible with SPI, QSPI, and MICROWIRE protocols. It uses CPOL = 0 and CPHA = 0 configuration, with CS falling edge initiating conversion and DOUT outputting MSB-first data on SCLK falling edges. QSPI mode requires exactly 13 clock cycles to read the 12-bit result plus leading EOC bit.
What is the maximum analog input frequency supported by MAX189AEWE+?
The MAX189AEWE+ has a 4.5MHz small-signal bandwidth and 75ksps sampling rate, allowing direct digitization of input signals up to 37.5kHz (Nyquist limit). Higher frequencies may be captured using undersampling techniques, provided anti-alias filtering prevents out-of-band energy from folding into the band of interest.
How does shutdown mode operate on MAX189AEWE+?
Driving the SHDN pin low places MAX189AEWE+ into shutdown mode, reducing supply current to ≤10µA. The device wakes up in <1µs (no tWAKE delay, unlike MAX187) since it relies on an external reference. Conversion can begin immediately after SHDN is deasserted and CS falls - ideal for duty-cycled sensing applications.
What package type is used for MAX189AEWE+?
MAX189AEWE+ is supplied in a 16-pin wide SO (SOIC-W) package with dimensions 10.3mm × 7.5mm × 2.65mm and standard 1.27mm pitch. It is not available in PDIP; the "WE" suffix explicitly denotes the wide SO variant, distinct from narrow SO or ceramic packages.
MAX189AEWE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 75k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX189AEWE+ FAQ
1.How can I place an order for MAX189AEWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX189AEWE+ 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 MAX189AEWE+ reliable?
The price and inventory of MAX189AEWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX189AEWE+ is usually 5 days.
3.What payment methods are accepted for MAX189AEWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX189AEWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX189AEWE+?
MAX189AEWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX189AEWE+ 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 MAX189AEWE+?
For technical support, including MAX189AEWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX189AEWE+ requirements.
6.How does Aetrix verify that MAX189AEWE+ is sourced from the original manufacturer or authorized distributors?
All MAX189AEWE+ 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 MAX189AEWE+ meets industry standards.
7.What is the process for return or replacement of MAX189AEWE+?
All MAX189AEWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX189AEWE+, 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 MAX189AEWE+ part is unused and in its original packaging.
Return procedure for MAX189AEWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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