My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX189AEPA+
- Part No.:
- MAX189AEPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX189AEPA+.pdf
- Description:
- IC ADC 12BIT SAR 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,369
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX189AEPA+ from Maxim Integrated is a 12-bit, single-supply +5V serial analog-to-digital converter (ADC) with external reference input, 75ksps throughput, ±½ LSB integral nonlinearity (A-grade), and 3-wire SPI/QSPI/MICROWIRE-compatible interface. It features an internal track/hold, 4.5MHz small-signal bandwidth, and operates across –40°C to +85°C for industrial data acquisition.
For engineers reviewing the MAX189AEPA+ datasheet, MAX189AEPA+ pinout, MAX189AEPA+ application, or MAX189AEPA+ equivalent, this page delivers verified electrical specs, package mapping to 8-pin PDIP, real-world timing constraints (e.g., tACQ = 1.5µs, tCONV ≤ 8.5µs), and validated alternative options for precision sensor interfacing and isolated DAQ systems.
Technical Context
The MAX189AEPA+ implements a successive-approximation register (SAR) architecture with integrated track/hold, requiring no external hold capacitor. Its conversion cycle is internally timed at ≤8.5µs, initiated by CS falling edge, with end-of-conversion signaled by DOUT high transition.
It accepts unipolar analog inputs from 0V to VREF (2.5V to VDD), supports external reference voltages up to 5.25V, and uses a 3-wire serial interface where SCLK clocks data out MSB-first on falling edges - compatible with SPI (CPOL=0, CPHA=0), QSPI, and MICROWIRE protocols without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 4096 discrete output codes over full-scale range. |
| Integral Nonlinearity | ±½ LSB (A-grade) - ensures monotonicity and <0.012% full-scale error after calibration. |
| Throughput Rate | 75ksps - enables sampling of signals up to 37.5kHz Nyquist frequency without aliasing. |
| Analog Input Bandwidth | 4.5MHz small-signal - supports accurate digitization of fast transients and undersampling applications. |
| Supply Current | 1.0–2.0mA operating / ≤10µA shutdown - reduces average power in burst-mode sensor systems. |
| Reference Input Range | +2.5V to VDD (4.75–5.25V) - allows flexible external reference selection including precision bandgap or DAC outputs. |
| SINAD | 70dB @ 10kHz - corresponds to ~11.3 effective bits, suitable for medium-fidelity signal analysis. |
Pinout & Package
MAX189AEPA+ is housed in an 8-pin plastic dual in-line package (PDIP), pin-compatible with MAX187 variants but configured for external reference operation. Pin functions are electrically validated per Maxim's official pin description table and functional diagram.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDD | Power supply input | +5V ±5% supply rail; must be decoupled near pin with 0.1µF ceramic capacitor. |
| 2 AIN | Analog input | Unipolar 0V to VREF sampling node; 16pF input capacitance requires low-impedance drive (≤5kΩ source). |
| 3 SHDN | Three-level shutdown control | Pull low for ≤10µA shutdown; float or high for active mode - no internal reference activation (MAX189-specific). |
| 4 REF | External reference input | Accepts 2.5V–5.25V reference; requires ≤10Ω output impedance and 0.1µF local bypass for stability. |
| 5 GND | Common analog/digital ground | Single ground plane required; no separate AGND/DGND pins in PDIP variant. |
| 6 DOUT | Serial data output | Three-state CMOS output; data valid on SCLK falling edge; MSB-first, 13-cycle frame (1 EOC + 12 data bits). |
| 7 CS | Active-low chip select | Falling edge initiates conversion; rising edge disables DOUT (high-Z); minimum pulse width 500ns. |
| 8 SCLK | Serial clock input | Accepts 0–5MHz clock; duty cycle unrestricted if high/low ≥100ns; must remain inactive during conversion. |
Key Features
| Feature | Design Value |
|---|---|
| 3-wire serial interface | Fully compatible with SPI, QSPI, and MICROWIRE protocols - eliminates need for parallel bus or glue logic. |
| Internal track/hold | Acquires signal in ≤1.5µs without external capacitor - simplifies front-end design and improves noise immunity. |
| Low-power shutdown | Reduces supply current to ≤10µA - enables microamp-level system sleep modes in battery-powered loggers. |
| Industrial temperature range | –40°C to +85°C operation - qualified for deployment in factory automation, remote monitoring, and harsh-environment sensors. |
| High DC accuracy | ±½ LSB INL (A-grade) and ±1 LSB gain error - supports calibrated measurement systems without post-processing correction. |
Applications
| Portable Data Logging | Remote Digital Signal Processing |
|---|---|
Use Scenario: Battery-powered environmental sensor nodes recording temperature, humidity, and pressure over extended intervals. IC Role / Device Role / Timing Role: Precision ADC capturing conditioned analog sensor outputs at 1–10ksps with minimal power overhead. Use Value: 10µA shutdown current extends battery life; 75ksps headroom supports oversampling for noise reduction. |
Use Scenario: Edge-processing modules in distributed control systems digitizing feedback signals from motor drives or power converters. IC Role / Device Role / Timing Role: High-fidelity analog front-end converting current/voltage feedback into digital domain for real-time FIR filtering. Use Value: 4.5MHz input bandwidth and 70dB SINAD preserve signal integrity for closed-loop stability analysis. |
| Isolated Data Acquisition | High-Accuracy Process Control |
Use Scenario: Opto-isolated industrial I/O modules acquiring analog signals from hazardous zones (e.g., 4–20mA loops, thermocouples). IC Role / Device Role / Timing Role: Isolated-side ADC interfacing with microcontroller via SPI across digital isolator (e.g., ADuM140x). Use Value: 3-wire interface minimizes isolation channel count; external reference allows precise scaling independent of primary-side rails. |
Use Scenario: Programmable logic controller (PLC) analog input cards measuring process variables like flow, level, and pH with <0.05% total error. IC Role / Device Role / Timing Role: Primary conversion element in multi-channel scan-based acquisition subsystems. Use Value: ±½ LSB INL and low PSR (0.06–0.5mV) ensure measurement repeatability across supply and temperature variations. |
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 | 12-bit, 200ksps, +5V supply, internal reference only; no external REF pin; higher power (2.5mA typ) | Not suitable where external reference flexibility or ultra-low shutdown current (<10µA) is required | Select MAX189AEPA+ when external reference sourcing, industrial temp range, or sub-10µA shutdown is mandatory |
| MAX11131AUT+T | 12-bit, 500ksps, internal reference, SPI-only interface, 6-pin SOT23 package; 1.8–3.6V supply | Designed for low-voltage portable systems - incompatible with +5V-only infrastructure and external REF topology | Choose MAX189AEPA+ for legacy +5V designs, external reference control, and PDIP prototyping compatibility |
Compared with ADS7816U and MAX11131AUT+T, the MAX189AEPA+ uniquely balances industrial temperature support, external reference configurability, and ultra-low shutdown current - making it the only option among the three qualified for isolated, wide-temp, externally referenced DAQ nodes.
Availability
MAX189AEPA+ is available at Aetrix Electronics and suitable for portable data logging, remote DSP, isolated data acquisition, and high-accuracy process control requiring stable component supply across extended lifecycle commitments.
Supply support for MAX189AEPA+ 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 designed specifically for low-power, space-constrained, serial-interface ADC applications in remote sensing and embedded control - emphasizing ease of integration, minimal external components, and robust industrial operation.
FAQ
What is the reference voltage requirement for MAX189AEPA+?
The MAX189AEPA+ requires an external reference voltage applied to the REF pin, ranging from +2.5V to VDD (4.75–5.25V). It does not include an internal reference. For optimal accuracy, the reference must provide ≤10Ω output impedance and ≤350µA load current, with a 0.1µF ceramic capacitor placed directly at the REF pin. The MAX189AEPA+ achieves ±½ LSB INL only when using a stable, low-noise reference within this range.
Does MAX189AEPA+ support SPI communication?
Yes, the MAX189AEPA+ supports SPI communication with CPOL = 0 and CPHA = 0 configuration. It uses a 3-wire interface (CS, SCLK, DOUT) and outputs 12-bit unipolar data MSB-first, preceded by a leading high bit (EOC flag), requiring exactly 13 SCLK falling edges for complete readout. No MISO or MOSI bidirectional lines are needed - DOUT is output-only, eliminating contention issues in multi-drop configurations.
What is the maximum sampling rate of MAX189AEPA+?
The MAX189AEPA+ achieves a guaranteed throughput rate of 75ksps under specified conditions (fCLK = 4.0MHz, unipolar mode, TA = –40°C to +85°C). This corresponds to a minimum conversion period of 13.3µs, with internal conversion time ≤8.5µs and track/hold acquisition time ≤1.5µs. Sampling beyond 75ksps is not characterized and may degrade AC performance or violate timing margins.
Can MAX189AEPA+ operate from a 3.3V supply?
No, the MAX189AEPA+ is specified only for +5V ±5% (4.75V to 5.25V) operation. Its absolute maximum VDD rating is +6V, and its digital interface thresholds (e.g., VINH = 2.4V, VINL = 0.8V) are designed for 5V logic families. Operating below 4.75V risks failure to meet AC/DC specifications, including reduced SINAD, increased INL, and unreliable serial communication - confirmed by Electrical Characteristics tables and Absolute Maximum Ratings.
How does shutdown mode work on MAX189AEPA+?
Shutdown mode on MAX189AEPA+ is activated by pulling the SHDN pin low, reducing supply current to ≤10µA. The device wakes up in ≤2µs (tWAKE) and is ready for conversion after CS assertion. Unlike the MAX187, SHDN has no reference-enable function on the MAX189AEPA+ - it serves solely as a power-gating control. During shutdown, the REF pin remains high-impedance and does not source/sink current, preserving external reference integrity.
MAX189AEPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- 8-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX189AEPA+ FAQ
1.How can I place an order for MAX189AEPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX189AEPA+ 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 MAX189AEPA+ reliable?
The price and inventory of MAX189AEPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX189AEPA+ is usually 5 days.
3.What payment methods are accepted for MAX189AEPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX189AEPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX189AEPA+?
MAX189AEPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX189AEPA+ 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 MAX189AEPA+?
For technical support, including MAX189AEPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX189AEPA+ requirements.
6.How does Aetrix verify that MAX189AEPA+ is sourced from the original manufacturer or authorized distributors?
All MAX189AEPA+ 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 MAX189AEPA+ meets industry standards.
7.What is the process for return or replacement of MAX189AEPA+?
All MAX189AEPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX189AEPA+, 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 MAX189AEPA+ part is unused and in its original packaging.
Return procedure for MAX189AEPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX189AEPA+ Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
