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Analog Devices Inc./Maxim Integrated MAX196ACNI
- Part No.:
- MAX196ACNI
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX196ACNI.pdf
- Description:
- IC ADC 12BIT SAR 28DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,158
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Product details
Overview
MAX196ACNI from Maxim Integrated is a multirange, single +5V-supply, 12-bit data-acquisition system (DAS) with six software-programmable analog input channels supporting ±10V, ±5V, 0V to +10V, and 0V to +5V ranges. It features a 5MHz track/hold bandwidth, 100ksps throughput rate, fault protection to ±16.5V per channel, and internal 4.096V reference - enabling direct interfacing of ±12V/±15V and 4–20mA industrial sensors in embedded control and test systems.
For engineers reviewing the MAX196ACNI datasheet, MAX196ACNI pinout, MAX196ACNI application, or MAX196ACNI equivalent, this page delivers verified technical context, real-world timing behavior, validated input range configuration logic, confirmed power-down mode sequencing, and precise analog-to-digital conversion specifications for industrial DAQ system design and replacement selection.
Technical Context
The MAX196ACNI employs successive approximation architecture with integrated track/hold circuitry and a 12-bit parallel µP interface. Its input multiplexer supports independent software-selectable unipolar/bipolar ranges via control bits D3–D4, and acquisition is configurable as internal (6-clock-cycle timed) or external (dual-WR edge-triggered), with INT signaling conversion completion.
It operates with either internal clock (100pF capacitor on CLK pin sets ~1.56MHz) or external clock (100kHz–2.0MHz), while maintaining TTL/CMOS-compatible digital I/O timing. Power management includes STBYPD (reference buffer active) and FULLPD (full shutdown) modes, both preserving fault-protected input integrity even at VDD = 0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit output with binary (unipolar) or two's-complement (bipolar) format |
| Input Channels | 6 independently selectable analog inputs (CH0–CH5) |
| Input Voltage Ranges | ±10V, ±5V, 0V to +10V, 0V to +5V - programmable per channel |
| Throughput Rate | 100ksps maximum sampling rate with 6µs conversion time |
| Reference | Internal 4.096V ±0.5% (trimmed), adjustable via REFADJ pin ±1.5% |
| Fault Protection | ±16.5V overvoltage tolerance on all analog inputs, functional during power-down |
| Supply | +5V ±5% only - no dual-rail or auxiliary supplies required |
Pinout & Package
MAX196ACNI is housed in a 28-pin narrow plastic DIP package (0°C to +70°C operating range), with through-hole mounting and standard 0.3-inch body width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH5 (16–21) | Analog input channel select terminals | Independent software-configurable inputs; each protected to ±16.5V |
| REF (23) | Reference buffer output / ADC reference input | Delivers 4.096V in internal mode; accepts external reference when REFADJ = VDD |
| REFADJ (22) | Reference adjust input / buffer gain control | Accepts 2.4V–4.18V reference; internal gain = 1.6384 yields 4.096V at REF |
| AGND (15) | Analog ground reference | Separate ground plane for analog section; must be tied to DGND at single point |
| DGND (28) | Digital ground reference | Return for digital I/O; AGND–DGND differential voltage limited to ±0.3V |
| WR (26) | Write strobe input | Latches control byte; initiates acquisition/conversion depending on ACQMOD bit state |
| RD (25) | Read strobe input | Enables three-state data bus output; INT goes high after first read |
| INT (24) | Interrupt output | Active-low signal indicating valid conversion result ready on data bus |
| CS (2) | Chip select input | Active-low enable for WR/RD operations; forces data bus into high-Z when high |
| D0–D11 (3–14) | 12-bit bidirectional data bus | Multiplexed control input and conversion result output; TTL/CMOS compatible |
| CLK (1) | Clock input | Accepts external 100kHz–2MHz clock; or configures internal oscillator with CCLK to ground |
| VDD (27) | +5V supply input | Bypassed to AGND with 0.1µF ceramic capacitor; max current = 18mA (normal mode) |
Key Features
| Feature | Design Value |
|---|---|
| Software-selectable input ranges | Four per-channel configurations (±10V, ±5V, 0–10V, 0–5V) increase effective dynamic range to 14 bits |
| Fault-protected analog multiplexer | ±16.5V tolerance on CH0–CH5 ensures no cross-channel corruption during overvoltage events |
| Two acquisition control modes | Internal (6-clock fixed timing) or external (dual-WR edge-triggered) enables precise aperture control |
| Programmable power-down | STBYPD retains reference buffer for zero-startup-delay wake-up; FULLPD draws <10µA |
| Single-supply +5V operation | Eliminates need for ±12V/±15V rails - simplifies power design and reduces BOM cost |
Applications
| Industrial Control Systems | Automatic Test Equipment |
|---|---|
Use Scenario: Monitoring analog sensor outputs (e.g., pressure, temperature, flow) in PLC-based factory automation cabinets. IC Role / Device Role / Timing Role: Primary ADC for multi-channel analog signal digitization with ±10V sensor compatibility and fault resilience. Use Value: Enables direct connection of legacy ±12V industrial transducers without level-shifting circuitry, reducing board area and calibration complexity. |
Use Scenario: High-speed parametric testing of analog components using PC-based test platforms with ISA/PCI bus interfaces. IC Role / Device Role / Timing Role: 100ksps data capture engine synchronized to system clock via external CLK and WR timing. Use Value: Delivers deterministic 6µs conversion latency and interrupt-driven data readiness (INT), improving test cycle repeatability. |
| Robotics Motion Control | Medical Instrumentation |
Use Scenario: Real-time feedback acquisition from motor current sense amplifiers and position encoders in servo drive modules. IC Role / Device Role / Timing Role: Fault-tolerant analog front-end converting ±5V current-sense signals with channel-to-channel isolation. Use Value: ±16.5V input protection prevents latch-up during motor back-EMF transients, ensuring system reliability in dynamic loads. |
Use Scenario: Signal conditioning in portable ECG or patient monitoring devices requiring low-power, high-accuracy biopotential measurement. IC Role / Device Role / Timing Role: Low-noise 12-bit acquisition subsystem with internal reference and STBYPD for battery-efficient duty-cycled operation. Use Value: Internal 4.096V reference eliminates external precision reference IC, reducing component count and long-term drift sensitivity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multirange, 12-bit data-acquisition applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX196BCNI | Same architecture and pinout; guaranteed performance over same 0°C to +70°C range but with tighter INL (±0.5 LSB vs. ±0.5 LSB typical, ±1 LSB max) | Preferred where production calibration margin requires guaranteed worst-case linearity | Select MAX196BCNI when full-spec compliance across temperature is mandatory; otherwise MAX196ACNI suffices for cost-sensitive designs. |
| ADS7816U | 12-bit SAR ADC with 200ksps rate, single +5V supply, but only 4-channel input and no ±10V range support - requires external level-shifting for bipolar signals | Suitable for lower-channel-count, unipolar-only systems where higher speed offsets reduced feature set | Choose ADS7816U only if throughput >100ksps is critical and input range flexibility is not required. |
Compared with MAX196BCNI, the MAX196ACNI offers identical functionality at relaxed initial accuracy specs, lowering cost without sacrificing fault protection or software configurability; versus ADS7816U, it provides broader input range support and channel count at the expense of peak sampling rate.
Availability
MAX196ACNI is available at Aetrix Electronics and suitable for industrial control systems, automatic test equipment, and robotics motion control applications requiring stable component supply across extended production lifecycles.
Supply support for MAX196ACNI 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 MAX196ACNI belongs to Maxim's legacy data-acquisition system product line, designed specifically for single-supply, multirange, fault-tolerant analog-to-digital conversion in harsh industrial environments.
FAQ
What input voltage ranges does the MAX196ACNI support, and how are they selected?
The MAX196ACNI supports ±10V, ±5V, 0V to +10V, and 0V to +5V input ranges. These are selected per channel by programming bits D3 (RNG) and D4 (BIP) in the 8-bit control byte written during a WR cycle. The MAX196ACNI's internal scaling network maps these ranges to its 4.096V reference, enabling direct interfacing of standard industrial sensor outputs without external signal conditioning.
Does the MAX196ACNI require an external reference, or can it operate with its internal reference?
The MAX196ACNI can operate with either its internal 4.096V reference (enabled by leaving REFADJ floating or connecting to appropriate adjustment circuit) or an external reference applied to REF or REFADJ pins. In internal mode, REF outputs 4.096V ±0.5%, adjustable ±1.5% via REFADJ; in external mode, the internal buffer is disabled by pulling REFADJ to VDD, and REF accepts 2.4V–4.18V references.
How does the MAX196ACNI handle overvoltage conditions on its analog inputs?
The MAX196ACNI provides ±16.5V fault protection on all six analog input channels (CH0–CH5). This protection remains active even when the device is in STBYPD or FULLPD power-down modes, and functions with VDD = 0V. The input resistive network limits current during overvoltage events, preventing damage or corruption of conversions on other channels.
What are the two power-down modes of the MAX196ACNI, and when should each be used?
The MAX196ACNI offers STBYPD (standby power-down) and FULLPD (full power-down) modes, selected via PD0/PD1 bits. STBYPD keeps the reference buffer active for immediate wake-up with no startup delay; FULLPD shuts down all circuitry except digital interface, drawing <10µA. Use STBYPD for rapid burst-mode acquisition; use FULLPD for extended idle periods in battery-powered systems.
Can the MAX196ACNI interface directly with a 16-bit microprocessor bus?
Yes - the MAX196ACNI features a 12-bit three-state parallel I/O port (D0–D11) with TTL/CMOS-compatible timing, designed to interface directly with common 16-bit µPs including Intel 80C186 and Motorola 68000 families. CS, WR, and RD signals align with standard µP bus protocols, and data-access timing meets specifications for most popular processors without glue logic.
MAX196ACNI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 6
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- MUX-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:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
MAX196ACNI FAQ
1.How can I place an order for MAX196ACNI through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX196ACNI 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 MAX196ACNI reliable?
The price and inventory of MAX196ACNI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX196ACNI is usually 5 days.
3.What payment methods are accepted for MAX196ACNI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX196ACNI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX196ACNI?
MAX196ACNI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX196ACNI 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 MAX196ACNI?
For technical support, including MAX196ACNI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX196ACNI requirements.
6.How does Aetrix verify that MAX196ACNI is sourced from the original manufacturer or authorized distributors?
All MAX196ACNI 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 MAX196ACNI meets industry standards.
7.What is the process for return or replacement of MAX196ACNI?
All MAX196ACNI units undergo pre-shipment inspection (PSI). If there is an issue with MAX196ACNI, 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 MAX196ACNI part is unused and in its original packaging.
Return procedure for MAX196ACNI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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