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Analog Devices Inc./Maxim Integrated MAX323CUA
- Part No.:
- MAX323CUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX323CUA.pdf
- Description:
- IC SWITCH SPST-NOX2 60OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,900
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Product details
Overview
MAX323CUA from Maxim Integrated is a precision dual normally open (NO) single-pole single-throw (SPST) analog switch IC designed for signal routing in low-power, single-supply systems. It operates from +2.7V to +16V, delivers ≤60Ω on-resistance, ≤2Ω channel-to-channel RON matching, and <5pC charge injection - enabling high-fidelity switching in battery-powered instrumentation and data acquisition front-ends.
For engineers reviewing the MAX323CUA datasheet, MAX323CUA pinout, MAX323CUA application, or MAX323CUA equivalent, this device is selected for precision analog multiplexing where low leakage (<100pA), fast switching (tON ≤150ns), rail-to-rail signal handling, and minimal distortion in DAC/ADC interface paths are critical design requirements.
Technical Context
The MAX323CUA implements two independent SPST NO switches using CMOS transmission-gate architecture with integrated level-shifting logic. Its single-supply operation eliminates need for dual rails while maintaining TTL/CMOS-compatible control inputs at V+ = 5V. Internal protection diodes clamp analog signals to within ±0.3V of V+ and GND.
It guarantees break-before-make timing only in the MAX325 variant - the MAX323CUA does not include B-B-M functionality. All channels are bidirectional, supporting analog signal flow from COM to NO or vice versa across the full 0V to V+ range with flat RON variation ≤6Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +16V - enables direct integration with 3.3V, 5V, and 12V systems without level shifters. |
| On-Resistance (RON) | ≤60Ω max at +5V - ensures minimal signal attenuation and gain error in precision sensor or DAC output paths. |
| RON Matching | ≤2Ω max between channels - critical for matched gain/phase in differential or dual-channel sampling circuits. |
| Charge Injection | ≤5pC - limits voltage glitch on sampled nodes, preserving accuracy in sample-and-hold and switched-capacitor applications. |
| Leakage Current | ≤100pA max at +25°C - maintains integrity of high-impedance sensor interfaces and long-time-constant integrators. |
| Switching Speed | tON ≤150ns, tOFF ≤100ns - supports multiplexing rates up to ~3MHz in time-critical data acquisition. |
| ESD Rating | ≥2000V per Method 3015.7 - provides robustness against handling and board-level ESD events. |
Pinout & Package
MAX323CUA is housed in an 8-pin µMAX package (3mm × 3mm, 0.5mm pitch), pin-compatible with SOIC-8 and PDIP-8 footprints but with significantly reduced board area. The package is RoHS-compliant (lead-free option available as MAX323CUA+), rated for 0°C to +70°C operation, and features exposed pad thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply rail | Accepts +2.7V to +16V; powers internal logic and switch transistors; substrate tied to V+. |
| GND | Ground reference | Return path for supply current and logic thresholds; must be low-impedance for noise immunity. |
| IN1, IN2 | Digital control inputs | TTL/CMOS-compatible at V+ = 5V; drive switches ON when high; rail-to-rail logic required at other supplies. |
| COM1, COM2 | Analog common terminals | Bidirectional signal ports - connect to source or load depending on system topology. |
| NO1, NO2 | Normally open analog switch outputs | Connect to COMx only when corresponding INx is high; isolated otherwise (no NC function). |
Key Features
| Feature | Design Value |
|---|---|
| Low power consumption | <5µW quiescent - extends battery life in portable test equipment and handheld meters. |
| High off-isolation | 72dB at 1MHz - prevents crosstalk between channels in multi-signal routing applications. |
| Flat on-resistance | ≤6Ω RON flatness - minimizes harmonic distortion and THD in audio and wide-dynamic-range analog paths. |
| Low off-capacitance | 9pF per NO/NC terminal - preserves bandwidth and settling time in high-speed signal chains. |
| Single-supply simplicity | No negative rail or charge pump needed - reduces BOM count and layout complexity vs. legacy dual-supply switches. |
Applications
| Battery-Powered Data Loggers | Industrial DAC/ADC Interface |
|---|---|
|
Use Scenario: Multiplexing multiple sensor outputs (thermocouples, RTDs) into a single precision ADC channel under 3.3V or 5V battery power. IC Role / Device Role / Timing Role: Dual SPST NO switch routing analog signals while maintaining low offset, gain error, and settling time. Use Value: Enables compact, low-quiescent-current front-end design with ≤100pA leakage and ≤5pC charge injection preserving measurement integrity. |
Use Scenario: Isolating reference voltage sources or calibrating DAC outputs during self-test sequences in programmable logic controllers. IC Role / Device Role / Timing Role: Precision analog switch providing break-before-make–free, low-RON connection between calibration resistors and DAC output node. Use Value: Delivers ≤60Ω RON and ≤2Ω matching to minimize gain mismatch errors across calibration cycles. |
| Audio Signal Routing | Test Equipment Multiplexing |
|
Use Scenario: Selecting between line-level audio sources in professional mixing consoles or broadcast gear operating from +12V rails. IC Role / Device Role / Timing Role: Bidirectional analog switch handling full-rail audio signals with flat RON and low THD. Use Value: ≤6Ω RON flatness and 85dB crosstalk suppression preserve stereo imaging and dynamic range. |
Use Scenario: Scanning multiple DUTs (devices under test) into shared ATE instrumentation channels in automated test systems. IC Role / Device Role / Timing Role: High-speed, low-leakage analog switch enabling rapid channel switching with minimal settling delay. Use Value: tON/tOFF ≤150ns/100ns and ≥72dB off-isolation reduce test cycle time and improve measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX323ESA | SOIC-8 package, -40°C to +85°C temperature range, same electrical specs. | Preferred for industrial environments requiring extended temperature operation and surface-mount assembly. | Select MAX323ESA when board space allows SOIC footprint and ambient temperature exceeds +70°C. |
| ADG1419BRMZ | Single-supply +5V to +16.5V, 0.6Ω typical RON, but higher 12pC charge injection and no 3.3V logic compatibility guarantee. | Better RON for ultra-low-loss paths, but less suitable for low-voltage logic control or precision charge-sensitive circuits. | Choose ADG1419BRMZ only if sub-1Ω RON is mandatory and charge injection tolerance >5pC is acceptable. |
Compared with MAX323ESA, the MAX323CUA offers identical switching performance in a smaller µMAX footprint but with narrower temperature range; versus ADG1419BRMZ, it trades lower RON for guaranteed low charge injection and broader logic compatibility - making MAX323CUA optimal for portable, precision, and mixed-voltage designs.
Availability
MAX323CUA is available at Aetrix Electronics and suitable for battery-operated systems, precision data acquisition, audio routing, and industrial DAC/ADC interface applications requiring stable component supply across production lifecycles.
Supply support for MAX323CUA 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, communications, and consumer applications.
The MAX323CUA belongs to Maxim's precision analog switch product line, engineered for low-distortion, low-power signal routing in portable and measurement-critical systems where rail-to-rail operation and minimal parasitic effects are essential.
FAQ
What is the maximum supply voltage rating for the MAX323CUA?
The MAX323CUA has an absolute maximum supply voltage (V+) of +17V, but its specified operational range is +2.7V to +16V. Exceeding +17V risks permanent damage. For reliable long-term operation, maintain V+ within the 2.7V–16V range and observe derating curves above +70°C ambient.
Does the MAX323CUA support break-before-make switching?
No, the MAX323CUA does not implement break-before-make (B-B-M) timing. That feature is exclusive to the MAX325 variant (one NO + one NC switch). The MAX323CUA contains two normally open switches only, and both channels operate independently with no guaranteed overlap or dead-time control between turn-off and turn-on transitions.
Can the MAX323CUA be used with a 3.3V logic supply?
Yes, the MAX323CUA accepts 3.3V logic inputs, but TTL compatibility is not guaranteed below +5V. When powered from +3.3V, drive IN1/IN2 rail-to-rail (0V to V+) to ensure reliable switching and minimize supply current. Logic thresholds scale with V+, so 0.6V/2.4V levels apply at 3.3V per datasheet specifications.
What is the typical on-capacitance of the MAX323CUA at the COM pin?
The typical on-capacitance (CCOM(ON)) at the COM pin of the MAX323CUA is 22pF, measured at 1MHz with V+ = 5V. This value impacts high-frequency signal integrity and settling time - especially in switched-capacitor filters or fast-settling multiplexed ADC front-ends where bandwidth and phase response are critical.
Is the MAX323CUA pin-compatible with other packages in the MAX323 family?
Yes, the MAX323CUA shares identical pinout and functionality with all MAX323 variants (e.g., MAX323CPA, MAX323ESA, MAX323EJA), including V+, GND, IN1, IN2, COM1, COM2, NO1, NO2. The µMAX package (CUA) is footprint-compatible with SOIC-8 and PDIP-8 layouts via adapter or redesign, but requires rework for direct replacement due to different land patterns and thermal pad requirements.
MAX323CUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 60Ohm
- Channel-to-Channel Matching (ΔRon):
- 800mOhm
- Voltage - Supply, Single (V+):
- 2.7V ~ 16V
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- 150ns, 100ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 9pF, 9pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -85dB @ 1MHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-µMAX
MAX323CUA FAQ
1.How can I place an order for MAX323CUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX323CUA 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 MAX323CUA reliable?
The price and inventory of MAX323CUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX323CUA is usually 5 days.
3.What payment methods are accepted for MAX323CUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX323CUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX323CUA?
MAX323CUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX323CUA 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 MAX323CUA?
For technical support, including MAX323CUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX323CUA requirements.
6.How does Aetrix verify that MAX323CUA is sourced from the original manufacturer or authorized distributors?
All MAX323CUA 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 MAX323CUA meets industry standards.
7.What is the process for return or replacement of MAX323CUA?
All MAX323CUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX323CUA, 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 MAX323CUA part is unused and in its original packaging.
Return procedure for MAX323CUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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