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Analog Devices Inc./Maxim Integrated MAX325CUA+
- Part No.:
- MAX325CUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX325CUA+.pdf
- Description:
- IC SW SPST-NO/NCX2 60OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:4,974
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Product details
Overview
MAX325CUA+ from Analog Devices is a precision dual SPST analog switch with one normally open (NO) and one normally closed (NC) channel, designed for single-supply operation from +2.7V to +16V. It delivers 60Ω max on-resistance, <5pC charge injection, guaranteed break-before-make timing (2ns), and 100pA max off-leakage - enabling high-fidelity signal routing in battery-powered audio/video systems and precision data acquisition.
For engineers reviewing the MAX325CUA+ datasheet, MAX325CUA+ pinout, MAX325CUA+ application, or MAX325CUA+ equivalent, key selection criteria include its dual-configuration switching topology, 150ns max tON/100ns max tOFF performance at 5V, RON matching <2Ω, and µMAX-8 package compatibility with space-constrained portable designs.
Technical Context
The MAX325CUA+ integrates two independent CMOS SPST switches sharing a common V+ and GND, with separate logic inputs (IN1, IN2) controlling COM1–NO1/NC1 and COM2–NO2/NC2 paths. Its break-before-make architecture ensures no transient shorting between channels during state transitions - critical for multiplexed sensor or DAC output routing.
It operates rail-to-rail for analog signals (0V to V+), supports TTL/CMOS logic levels at 5V supply, and maintains low leakage (<2.5nA at +85°C) and flat on-resistance (<6Ω RON flatness) across the full signal range - enabling accurate signal switching without gain or offset error in precision instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | +2.7V to +16V single supply - eliminates need for dual-rail supplies in portable or industrial systems. |
| On-Resistance (RON) | 60Ω max at +25°C, 75Ω max over full temperature range - ensures minimal signal attenuation in 50Ω–1kΩ impedance interfaces. |
| RON Matching | <2Ω max between channels at +25°C - enables matched gain/phase response in differential or dual-path signal chains. |
| Charge Injection | <5pC max - prevents voltage glitches in sample-and-hold or integrator circuits requiring sub-mV accuracy. |
| Switching Speed | tON <150ns, tOFF <100ns at 5V - supports >5MHz multiplexing in real-time test equipment and comms front-ends. |
| Leakage Current | 100pA max off-leakage at +25°C; <5nA over full temp range - preserves DC integrity in high-impedance sensor nodes. |
| ESD Rating | >2000V per Method 3015.7 - enhances robustness in handling and board-level ESD environments. |
Pinout & Package
The MAX325CUA+ is housed in an 8-pin µMAX package (2.1mm × 2.1mm, 0.5mm pitch), optimized for high-density PCB layouts in portable electronics. Pin 1 is NO1 (MAX325-specific), Pin 2 is COM1, Pin 3 is IN2, Pin 4 is GND, Pin 5 is NC2 (MAX325-specific), Pin 6 is COM2, Pin 7 is IN1, and Pin 8 is V+.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NO1) | Normally Open analog terminal (Channel 1) | Connects to COM1 only when IN1 = logic high - used for default-open signal path in fail-safe routing. |
| Pin 2 (COM1) | Common analog node (Channel 1) | Bidirectional I/O port; routes signal between NO1 and NC1 based on IN1 state - central hub for channel 1 signal flow. |
| Pin 3 (IN2) | Logic input (Channel 2) | Active-high TTL/CMOS-compatible control for COM2–NC2/NO2 - enables synchronous dual-channel switching. |
| Pin 4 (GND) | Ground reference | Return path for supply and logic; must be low-impedance to minimize noise coupling into analog paths. |
| Pin 5 (NC2) | Normally Closed analog terminal (Channel 2) | Connects to COM2 when IN2 = logic low - provides default-closed path for power-up or fault-tolerant configurations. |
| Pin 6 (COM2) | Common analog node (Channel 2) | Bidirectional I/O port; routes signal between NO2 and NC2 based on IN2 state - isolated from COM1 for crosstalk suppression. |
| Pin 7 (IN1) | Logic input (Channel 1) | Active-high TTL/CMOS-compatible control for COM1–NO1/NC1 - independent of IN2 for asymmetric control schemes. |
| Pin 8 (V+) | Positive supply | Single supply rail powering both analog and logic sections - accepts 2.7V–16V; substrate tied to V+ for latch-up immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Break-before-make switching | Guaranteed 2ns minimum delay between channel turn-off and turn-on - prevents momentary shorts in power-sensitive or high-precision multiplexers. |
| Rail-to-rail analog signal range | 0V to V+ operation - allows full-scale signal switching without clipping in 3.3V, 5V, or 12V systems. |
| Low charge injection | <5pC - minimizes voltage step errors in sample-and-hold amplifiers and switched-capacitor filters. |
| TTL/CMOS logic compatibility | Valid at 5V supply (VINL ≤ 0.8V, VINH ≥ 2.4V) - simplifies interface with microcontrollers and FPGAs without level-shifting. |
| Ultra-low power consumption | <5μW typical - extends battery life in portable medical devices and handheld test instruments. |
Applications
| Battery-Powered Audio Switching | High-Accuracy Sample-and-Hold Circuits |
|---|---|
|
Use Scenario: Routing microphone or line-level audio between multiple codecs or ADCs in a handheld recorder. IC Role / Device Role / Timing Role: Dual-channel SPST switch providing isolated signal paths with break-before-make to prevent pop/click artifacts during channel changes. Use Value: 100pA leakage and <5pC charge injection preserve dynamic range and SNR in 24-bit audio paths. |
Use Scenario: Sampling analog sensor outputs (e.g., thermocouple, strain gauge) into a precision ADC with hold capacitor. IC Role / Device Role / Timing Role: Low-RON, low-charge-injection switch connecting sensor to hold capacitor during acquisition phase. Use Value: 60Ω max RON and <6Ω RON flatness ensure minimal settling error and gain nonlinearity in sub-0.01% accuracy systems. |
| Military Radio Front-End Signal Routing | PBX/PABX Voice Channel Multiplexing |
|
Use Scenario: Selecting between RF receive paths or antenna diversity inputs in compact tactical radios operating from 3V–12V supplies. IC Role / Device Role / Timing Role: Single-supply SPST switch enabling fast, glitch-free reconfiguration of analog signal chains under wide temperature (-40°C to +85°C). Use Value: 2000V ESD rating and -40°C to +85°C extended temp grade support rugged field deployment without external protection. |
Use Scenario: Managing voice channel connections between line cards and digital signal processors in enterprise telephony systems. IC Role / Device Role / Timing Role: Dual independent switch controlling analog voice path continuity and tone generation routing. Use Value: Guaranteed break-before-make prevents cross-talk between active voice channels during call setup or transfer. |
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 |
|---|---|---|---|
| MAX325CSA+ | Same electrical specs, but in 8-pin SO package (3.9mm × 4.9mm) - 4× larger footprint than µMAX. | Suitable for prototyping or lower-density boards where thermal mass or hand-soldering is preferred. | Select MAX325CSA+ when board space permits and SO package handling is required for assembly or rework. |
| ADG1419BRMZ | Single-supply operation (±5V dual or +12V single), 0.6Ω typical RON, but no guaranteed break-before-make; 10ns switching. | Better for low-RON, high-speed applications where break-before-make is not mandatory (e.g., video switching). | Select ADG1419BRMZ when ultra-low on-resistance and faster switching outweigh the need for guaranteed break-before-make behavior. |
Compared with MAX325CSA+, the MAX325CUA+ saves >75% board area while maintaining identical switching characteristics; compared with ADG1419BRMZ, it trades 0.6Ω RON for deterministic break-before-make timing essential in fault-tolerant analog routing.
Availability
MAX325CUA+ is available at Aetrix Electronics and suitable for battery-operated systems, precision data acquisition, military communications, and telecom infrastructure requiring stable component supply and long-term manufacturability.
Supply support for MAX325CUA+ 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX325CUA+ belongs to the MAX32x family of precision single-supply analog switches, engineered for low-leakage, low-distortion signal routing in portable and high-reliability systems where power efficiency and signal fidelity are critical.
FAQ
What is the guaranteed break-before-make timing specification for MAX325CUA+?
The MAX325CUA+ guarantees a minimum break-before-make time delay of 2ns under RL = 300Ω and CL = 35pF conditions. This parameter is explicitly specified in the Electrical Characteristics table for the MAX325 variant and is not applicable to MAX323 or MAX324. The timing ensures no overlap between channel conduction states, preventing signal shorting during switching transitions in the MAX325CUA+.
Does MAX325CUA+ support rail-to-rail analog signal switching?
Yes, the MAX325CUA+ supports analog signal ranges from 0V to V+ across its NO, NC, and COM terminals. This rail-to-rail capability is confirmed in the Electrical Characteristics tables for +5V, +3.3V, and +3V supplies. It enables full-scale signal switching without clipping in systems powered by 2.7V–16V supplies, making the MAX325CUA+ suitable for both low-voltage portable and higher-voltage industrial applications.
What is the maximum allowable supply voltage for MAX325CUA+?
The absolute maximum supply voltage for MAX325CUA+ is +17V, as stated in the Absolute Maximum Ratings table. Continuous operation is rated from +2.7V to +16V. Exceeding +17V risks permanent damage. The device's internal diode clamping structure protects against overvoltage on analog pins, but V+ itself must remain within this limit to ensure reliable operation of the MAX325CUA+.
Is MAX325CUA+ compatible with TTL logic levels?
The MAX325CUA+ is TTL/CMOS logic compatible only when operated from a +5V supply, with VINL ≤ 0.8V and VINH ≥ 2.4V. At other supply voltages (e.g., +3.3V or +12V), logic thresholds scale with V+, so rail-to-rail driving (0V and V+) is required. This behavior is documented in the Applications Information section and applies specifically to the MAX325CUA+.
What package type does MAX325CUA+ use, and what are its key mechanical dimensions?
The MAX325CUA+ uses the 8-pin µMAX package (also referred to as μMAX), measuring 2.1mm × 2.1mm with 0.5mm lead pitch. Its height is 0.8mm max, and it features gull-wing leads compatible with standard SMT reflow profiles. These dimensions are specified in the Package Information section and distinguish the MAX325CUA+ from SO (MAX325CSA+) and DIP (MAX325CPA+) variants of the same device.
MAX325CUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SPST - NO/NC
- 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-uMAX/uSOP
MAX325CUA+ FAQ
1.How can I place an order for MAX325CUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX325CUA+ 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 MAX325CUA+ reliable?
The price and inventory of MAX325CUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX325CUA+ is usually 5 days.
3.What payment methods are accepted for MAX325CUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX325CUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX325CUA+?
MAX325CUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX325CUA+ 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 MAX325CUA+?
For technical support, including MAX325CUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX325CUA+ requirements.
6.How does Aetrix verify that MAX325CUA+ is sourced from the original manufacturer or authorized distributors?
All MAX325CUA+ 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 MAX325CUA+ meets industry standards.
7.What is the process for return or replacement of MAX325CUA+?
All MAX325CUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX325CUA+, 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 MAX325CUA+ part is unused and in its original packaging.
Return procedure for MAX325CUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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