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Analog Devices Inc./Maxim Integrated MAX320CUA+T
- Part No.:
- MAX320CUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX320CUA+T.pdf
- Description:
- IC SWITCH SPST-NOX2 35OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:1,750
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Product details
Overview
The MAX320CUA+T from Maxim Integrated is a precision dual SPST analog switch with two normally open (NO) channels, designed for ±3V to ±8V bipolar supply operation. It delivers 35Ω max on-resistance, <2Ω channel-to-channel RON matching, and 5pC max charge injection - enabling high-fidelity signal routing in ±5V DAC/ADC interfaces and battery-powered test equipment.
For engineers reviewing the MAX320CUA+T datasheet, MAX320CUA+T pinout, MAX320CUA+T application, or MAX320CUA+T equivalent, key selection criteria include guaranteed break-before-make timing (not applicable), low leakage (<2.5nA at +85°C), fast switching (tON < 150ns), and µMAX-8 package compatibility with space-constrained portable designs.
Technical Context
The MAX320CUA+T implements CMOS-based transmission-gate architecture with back-to-back N- and P-channel MOSFETs per switch, enabling bidirectional analog signal routing across the full ±5V range without distortion. Its logic inputs accept TTL/CMOS-compatible thresholds referenced to V+, supporting direct interfacing with microcontrollers operating at V+ = +5V.
Internal ESD protection exceeds 2000V per Method 3015.7, and the device maintains stable RON flatness (<4Ω) over temperature and signal voltage - critical for precision sample-and-hold circuits where gain error and settling time must remain predictable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±3V to ±8V dual supply - supports industrial ±5V systems and extended-range instrumentation without level-shifting. |
| On-Resistance (RON) | 35Ω max at ±5V - ensures minimal insertion loss and gain error in precision signal paths. |
| RON Matching | <2Ω between channels - preserves amplitude balance in differential or dual-path applications. |
| Charge Injection | 5pC max - limits voltage glitch on sampled nodes, essential for 12-bit+ ADC front-ends. |
| Leakage Current | <2.5nA at +85°C - maintains accuracy in high-impedance sensor interfaces and long-hold sample-and-hold circuits. |
| Switching Speed | tON < 150ns, tOFF < 100ns - enables multiplexing of audio-band and medium-speed control signals. |
| ESD Protection | >2000V per Method 3015.7 - provides robust handling in manufacturing and field-replaceable modules. |
Pinout & Package
MAX320CUA+T uses an 8-pin µMAX package (2.1mm × 2.1mm, 0.5mm pitch), optimized for compact portable and aerospace-grade assemblies requiring low profile and thermal efficiency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply rail | Accepts +3V to +8V; substrate tied internally to V+ for latch-up immunity. |
| IN1 | Channel 1 logic control input | Active-high: drives NO1 closed when logic high (≥V+ − 1.5V); TTL/CMOS compatible. |
| COM2 | Channel 2 common analog terminal | Bidirectional node - connects to load or source; supports full ±5V analog swing. |
| NO2 | Channel 2 normally open analog terminal | Open-circuit when IN2 = low; closed path to COM2 when IN2 = high. |
| V− | Negative supply rail | Accepts −3V to −8V; establishes reference for analog signal range and logic thresholds. |
| IN2 | Channel 2 logic control input | Independent control of second switch; no inter-channel timing dependency. |
| COM1 | Channel 1 common analog terminal | Shared path for signal routing; matched RON and flatness with COM2. |
| NO1 | Channel 1 normally open analog terminal | Primary signal path for first switch; 5pC charge injection verified at ±3V COM swing. |
Key Features
| Feature | Design Value |
|---|---|
| Low on-resistance flatness | <4Ω variation over full ±5V analog range - minimizes harmonic distortion in audio switching. |
| Bipolar supply support | Operates natively from ±3V to ±8V - eliminates need for external charge pumps or level shifters in dual-rail systems. |
| Guaranteed low leakage | <100pA at +25°C, <2.5nA at +85°C - preserves integrity of high-Z sensor outputs and integrator nodes. |
| Fast, matched switching | tON/tOFF < 150ns/100ns with <2Ω RON match - enables synchronous dual-channel sampling without skew-induced errors. |
| High ESD tolerance | >2000V HBM - reduces field failure risk in handheld test gear and military radio I/O modules. |
Applications
| Battery-Powered Test Equipment | ±5V Precision Data Acquisition |
|---|---|
|
Use Scenario: Portable multimeter front-end multiplexing analog signals from multiple sensors into a single ±5V ADC. IC Role / Device Role / Timing Role: Dual SPST switch routing isolated sensor outputs while maintaining signal fidelity and minimizing power draw. Use Value: 1.25mW total supply power and 100pA leakage preserve battery life and measurement accuracy over temperature. |
Use Scenario: Channel selection in a 16-channel ±5V data logger interfacing thermocouples and strain gauges. IC Role / Device Role / Timing Role: Precision analog switch providing matched on-resistance and low charge injection for consistent gain calibration. Use Value: 2Ω RON matching and 4Ω flatness ensure ≤0.1% channel-to-channel gain error across full input range. |
| Audio Signal Routing | Military Radio I/O Interface |
|
Use Scenario: Selecting between microphone and line-level inputs in a ruggedized handheld comms unit. IC Role / Device Role / Timing Role: Bidirectional analog switch handling AC-coupled audio with minimal THD and crosstalk. Use Value: 85dB crosstalk and 9pF off-capacitance prevent audible bleed-through between audio paths. |
Use Scenario: Isolating RF front-end bias lines and IF signal paths during mode switching in tactical radios. IC Role / Device Role / Timing Role: High-reliability analog switch with 2000V ESD rating for harsh electromagnetic environments. Use Value: Guaranteed operation from −40°C to +85°C and 2000V ESD withstand enable drop-in use in MIL-STD-810G platforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX320ESA+ | 8-pin SO package, same electrical specs, −40°C to +85°C temp range | Better thermal dissipation and reworkability; not suitable for ultra-dense PCB layouts | Select for industrial control panels requiring hand-soldering or higher power cycling margin. |
| ADG1421BRMZ | Single-supply only (±15V max), 1.8Ω typical RON, 2.5pC charge injection | Requires level-shifting for ±5V systems; superior RON but incompatible supply architecture | Choose only if redesigning for single-rail 12V systems and lower RON is critical. |
Compared with MAX320ESA+ and ADG1421BRMZ, the MAX320CUA+T uniquely combines µMAX footprint, guaranteed ±5V dual-supply operation, and production-proven 2000V ESD rating - making it the optimal choice for miniaturized, battery-operated instrumentation where layout density and supply simplicity are non-negotiable.
Availability
MAX320CUA+T is available at Aetrix Electronics and suitable for battery-powered test equipment, ±5V precision data acquisition, audio signal routing, and military radio I/O interface applications requiring stable component supply and long-term obsolescence management.
Supply support for MAX320CUA+T 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing markets.
The MAX320CUA+T belongs to Maxim's precision analog switch product line, engineered specifically for low-leakage, low-distortion signal routing in dual-supply systems where size, power, and reliability are tightly constrained.
FAQ
What is the operating temperature range for the MAX320CUA+T?
The MAX320CUA+T is rated for 0°C to +70°C operation, validated across the full range for on-resistance, leakage current, and switching speed. This commercial-grade specification aligns with its µMAX packaging and target use in portable instrumentation and consumer-grade test gear where ambient conditions remain controlled. The MAX320CUA+T does not support extended temperature grades like the MAX320EJA (−40°C to +85°C) or MAX320MJA (−55°C to +125°C).
Does the MAX320CUA+T support break-before-make switching?
No, the MAX320CUA+T does not implement break-before-make functionality. That feature is exclusive to the MAX322 variant (one NO + one NC switch), which guarantees a minimum 2ns delay between channel turn-off and turn-on. The MAX320CUA+T contains two independent normally open switches with no timing coordination between them - each channel operates asynchronously based on its respective INx input.
Can the MAX320CUA+T be used with single-supply systems?
The MAX320CUA+T requires dual supplies (V+ and V−) and is not specified for single-supply operation. Its internal architecture relies on symmetric or asymmetric bipolar rails (e.g., +5V/−5V or +8V/−3V), and logic thresholds are referenced to V+. For single-supply applications, Maxim recommends the pin-compatible MAX323/MAX324/MAX325 series, which operate from +3V to +15V with ground-referenced logic.
What is the maximum analog signal voltage the MAX320CUA+T can switch?
The MAX320CUA+T supports analog signals from V− to V+, with absolute maximum ratings allowing V+ up to +17V relative to V−. At ±5V supplies, this means the device reliably switches signals from −5V to +5V. Exceeding V+ or V− at any analog pin (COM, NO, NC) triggers internal clamping diodes - forward current must be limited to ≤30mA continuous or ≤100mA pulsed (1ms, 10% duty cycle) to avoid damage.
How does the MAX320CUA+T compare to the MAX320CPA in terms of performance?
The MAX320CUA+T and MAX320CPA share identical electrical specifications - including 35Ω max RON, 5pC max charge injection, and 150ns max tON. Their only differences are package (µMAX-8 vs. plastic DIP-8) and temperature grade (0°C to +70°C for both). The MAX320CUA+T offers 45% smaller footprint and improved thermal resistance (4.10mW/°C derating vs. 9.09mW/°C for DIP), making it preferable for space- and power-sensitive designs.
MAX320CUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 300mOhm
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- ±2.7V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 150ns, 100ns
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- 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-uMAX/uSOP
MAX320CUA+T FAQ
1.How can I place an order for MAX320CUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX320CUA+T 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 MAX320CUA+T reliable?
The price and inventory of MAX320CUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX320CUA+T is usually 5 days.
3.What payment methods are accepted for MAX320CUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX320CUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX320CUA+T?
MAX320CUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX320CUA+T 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 MAX320CUA+T?
For technical support, including MAX320CUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX320CUA+T requirements.
6.How does Aetrix verify that MAX320CUA+T is sourced from the original manufacturer or authorized distributors?
All MAX320CUA+T 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 MAX320CUA+T meets industry standards.
7.What is the process for return or replacement of MAX320CUA+T?
All MAX320CUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX320CUA+T, 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 MAX320CUA+T part is unused and in its original packaging.
Return procedure for MAX320CUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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