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Analog Devices Inc./Maxim Integrated MAX199BEAI+
- Part No.:
- MAX199BEAI+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- -
- Datasheet:
-
MAX199BEAI+.pdf
- Description:
- IC DAS 12BIT 8CH 28-SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,396
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Product details
Overview
MAX199BEAI+ from Maxim Integrated is a multi-range, 12-bit data-acquisition system (DAS) with eight software-programmable analog input channels, single +5V supply operation, ±4V input range capability, fault protection to ±16.5V, and 100ksps throughput rate - used in industrial control systems for interfacing 4mA-to-20mA and ±12V sensors to low-voltage microprocessor systems.
For engineers reviewing the MAX199BEAI+ datasheet, MAX199BEAI+ pinout, MAX199BEAI+ application, or MAX199BEAI+ equivalent, key selection considerations include its 8+4 parallel bus interface, internal/external clock support, dual power-down modes (STBYPD/FULLPD), ±1/2 LSB INL, and compatibility with TTL/CMOS microprocessors requiring minimal external components.
Technical Context
The MAX199BEAI+ employs successive approximation architecture with integrated track/hold circuitry, supporting both internal (6-clock-cycle acquisition) and external acquisition control via WR signal sequencing. Its input multiplexer enables per-channel range selection across ±VREF, ±VREF/2, 0V–VREF, and 0V–VREF/2 modes.
It features a 5MHz small-signal input bandwidth, 4.096V internal reference buffer (adjustable via REFADJ), and fault-tolerant analog front-end that isolates channel faults without affecting conversion integrity. Digital interface timing complies with standard µP bus cycles including CS/WR/RD handshaking and HBEN-driven 8+4 data multiplexing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes for high-fidelity sensor digitization |
| INL | ±1/2 LSB - ensures monotonicity and accurate end-point linearity over full scale |
| Throughput Rate | 100ksps - supports real-time sampling of dynamic industrial signals up to 50kHz Nyquist frequency |
| Input Protection | ±16.5V fault tolerance - allows direct connection to industrial field wiring without external clamping |
| Reference | Internal 4.096V or external - eliminates need for precision external reference in cost-sensitive designs |
| Power Supply | +5V only - simplifies system power architecture versus dual-supply ADCs |
| Interface | 8+4 parallel bus - reduces PCB trace count vs. serial interfaces while maintaining µP compatibility |
Pinout & Package
The MAX199BEAI+ is housed in a 28-pin SSOP (Shrink Small Outline Package) with 0.635mm pitch, thermally enhanced for industrial ambient operation and compatible with standard surface-mount reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DGND (28) | Digital Ground Reference | Return path for all digital I/O; must be isolated from AGND except at single-point star ground |
| VDD (27) | +5V Power Supply | Requires local 0.1µF ceramic bypass to AGND to suppress high-frequency noise coupling into analog section |
| CH0–CH7 (16–23) | Analog Input Channels | Software-selectable inputs supporting bipolar/unipolar ranges; each protected to ±16.5V independent of device state |
| REF (26) | Reference Buffer Output / External Reference Input | Provides 4.096V nominal output when internal reference enabled; accepts external reference when REFADJ tied to VDD |
| REFADJ (25) | Reference Adjustment Input | Accepts 2.4V–4.18V input to generate precise 4.096V at REF via 1.6384 gain; bypassed with 0.01µF to AGND |
| HBEN (5) | High-Byte Enable Control | Selects 8-bit LSB (HBEN = low) or 4-bit MSB (HBEN = high) output on D0–D7 bus - enables compact 8-bit data bus interfacing |
| SHDN (6) | Hardware Shutdown Input | Pulling low forces FULLPD mode, reducing supply current to ≤5µA while preserving fault protection and register state |
| INT (24) | Interrupt Output | Active-low signal indicates conversion completion and data validity; resets on first RD cycle or new control byte write |
Key Features
| Feature | Design Value |
|---|---|
| Multi-range input programming | Four software-selectable input spans (±VREF, ±VREF/2, 0–VREF, 0–VREF/2) enable single DAS to condition diverse sensor outputs without external scaling |
| Fault-protected analog mux | ±16.5V overvoltage tolerance on all CH0–CH7 pins remains active even during FULLPD or VDD = 0V, preventing system damage from field transients |
| Two power-down modes | STBYPD retains reference buffer bias for zero-startup-delay wake-up; FULLPD cuts total supply current to <5µA for battery-backed monitoring |
| Flexible clock architecture | Supports internal clock (capacitor-tuned, 1.25–2.0MHz) or external clock (100kHz–2MHz), decoupling µP resource usage from ADC timing control |
| 8+4 parallel interface | Reduces data bus footprint by multiplexing 12-bit result across two 8-bit µP reads - avoids need for 16-bit bus or serial protocol overhead |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Continuous acquisition of temperature, pressure, and flow sensor outputs in PLC-based factory automation cabinets. IC Role / Device Role / Timing Role: Central 12-bit DAS performing synchronized sampling across 8 analog channels with programmable gain and polarity per channel. Use Value: Eliminates external signal conditioning for ±12V/±15V sensors and 4–20mA loops, reducing BOM count and calibration complexity in DIN-rail mounted controllers. | Use Scenario: High-speed parametric testing of analog ICs and passive components on production test fixtures. IC Role / Device Role / Timing Role: Precision digitizer capturing transient response waveforms with 100ksps sustained rate and ±1/2 LSB linearity. Use Value: Enables pass/fail decisions based on ENOB > 10.5 bits at 10kHz input, meeting MIL-STD-883 Class B accuracy requirements without post-processing correction. |
| Medical Patient Monitoring | Telecom Line Card Diagnostics |
Use Scenario: Acquisition of ECG, respiration, and blood oxygen analog signals in portable bedside monitors with strict low-power constraints. IC Role / Device Role / Timing Role: Low-noise, fault-isolated DAS operating from single +5V rail with STBYPD mode enabling rapid wake-from-sleep acquisition. Use Value: Maintains ±16.5V patient isolation margin while achieving 70dB SINAD and <0.1% gain drift over 0°C–70°C, satisfying IEC 60601-1 leakage current limits. | Use Scenario: Real-time voltage/current monitoring of DSLAM and optical line card power supplies in central office environments. IC Role / Device Role / Timing Role: Ruggedized DAS interfacing directly to -48V telecom distribution rails using bipolar input ranges and hardware shutdown for maintenance safety. Use Value: Withstands accidental contact with -48V or +24V maintenance probes without latch-up, and provides traceable 12-bit logs for predictive failure analysis per GR-1089-CORE immunity standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar data-acquisition system applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX197BCWI+ | Different input range set (±10V, ±5V, 0–10V, 0–5V); identical 12-bit SAR architecture, 100ksps, and 8-channel mux but lacks ±16.5V fault protection | Better suited for legacy industrial systems calibrated to ±10V standards; not recommended where field-wiring overvoltage risk exists | Choose MAX197BCWI+ only when existing system design uses ±10V sensor scaling and fault protection is handled externally |
| ADS7816U | 16-bit resolution, SPI interface, single-ended inputs only, no software-programmable ranges; requires external reference and separate power supply sequencing | Targeted at high-precision, low-channel-count instrumentation where resolution outweighs interface flexibility and ruggedness | Select ADS7816U when absolute accuracy >14-bit effective resolution is mandatory and system can accommodate serial interface and external protection circuitry |
Compared with MAX197BCWI+, the MAX199BEAI+ provides superior field robustness via ±16.5V input fault tolerance and broader sensor compatibility through ±VREF/2 and 0–VREF/2 ranges; versus ADS7816U, it trades resolution for integration, ease of µP interfacing, and built-in protection - making it optimal for cost-sensitive, high-reliability industrial DAS deployments.
Availability
MAX199BEAI+ is available at Aetrix Electronics and suitable for industrial-control systems, automated test equipment, medical instruments, and telecommunications infrastructure requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX199BEAI+ 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 and mixed-signal ICs for industrial, automotive, and communications applications, emphasizing high integration, reliability, and power efficiency.
The MAX199BEAI+ belongs to Maxim's legacy data-acquisition system family, engineered specifically for single-supply, multi-sensor industrial monitoring where fault tolerance, software-configurable ranges, and µP-friendly parallel interfacing are critical design requirements.
FAQ
What is the maximum input voltage the MAX199BEAI+ can withstand without damage?
The MAX199BEAI+ analog input channels (CH0–CH7) are fault-protected to ±16.5V - meaning they tolerate continuous DC overvoltage up to those levels even when the device is unpowered (VDD = 0V). This protection remains active in all power-down modes and does not require external components. Exceeding ±16.5V may cause permanent damage per Absolute Maximum Ratings.
Does the MAX199BEAI+ require an external reference voltage, or does it have an internal one?
The MAX199BEAI+ includes an internal 4.096V reference buffer, adjustable via the REFADJ pin (2.4V–4.18V input yields 4.096V at REF). It also supports external references applied directly to REF (with REFADJ tied to VDD) or to REFADJ (with internal buffer enabled). Internal reference operation eliminates external component count and simplifies layout.
How does the 8+4 bus interface of the MAX199BEAI+ work with an 8-bit microprocessor?
The MAX199BEAI+ uses HBEN to multiplex its 12-bit result across two 8-bit reads: when HBEN = low, D0–D7 carry the LSB byte (bits 0–7); when HBEN = high, D0–D3 carry the MSB nibble (bits 8–11), and D4–D7 reflect sign extension (bipolar) or zero-fill (unipolar). This allows full 12-bit data transfer using only an 8-bit data bus and standard µP I/O timing.
What are the differences between STBYPD and FULLPD power-down modes in the MAX199BEAI+?
In STBYPD mode, the reference buffer remains powered, enabling immediate conversion upon wake-up with no reference settling delay. In FULLPD mode, all internal circuitry except the digital interface is disabled, reducing supply current to <5µA. Both modes retain fault protection and allow register access; FULLPD requires ~8ms reference re-stabilization after exit.
Can the MAX199BEAI+ interface directly with ±12V or ±15V sensors without external level-shifting?
Yes - when configured for ±VREF or ±VREF/2 input ranges and using the internal 4.096V reference, the MAX199BEAI+ supports ±4V or ±2V full-scale ranges. Combined with its ±16.5V input fault tolerance, it safely digitizes ±12V/±15V sensor outputs when used with appropriate external resistive dividers (e.g., 3:1 for ±12V → ±4V), eliminating active op-amp level shifters in many cases.
MAX199BEAI+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- -
- Sampling Rate (Per Second):
- -
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- -
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- -
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -
- Supplier Device Package:
- -
- Mounting Type:
- -
- Grade:
- -
- Qualification:
- -
MAX199BEAI+ FAQ
1.How can I place an order for MAX199BEAI+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX199BEAI+ 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 MAX199BEAI+ reliable?
The price and inventory of MAX199BEAI+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX199BEAI+ is usually 5 days.
3.What payment methods are accepted for MAX199BEAI+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX199BEAI+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX199BEAI+?
MAX199BEAI+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX199BEAI+ 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 MAX199BEAI+?
For technical support, including MAX199BEAI+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX199BEAI+ requirements.
6.How does Aetrix verify that MAX199BEAI+ is sourced from the original manufacturer or authorized distributors?
All MAX199BEAI+ 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 MAX199BEAI+ meets industry standards.
7.What is the process for return or replacement of MAX199BEAI+?
All MAX199BEAI+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX199BEAI+, 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 MAX199BEAI+ part is unused and in its original packaging.
Return procedure for MAX199BEAI+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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