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Analog Devices Inc./Maxim Integrated MAX325CPA+
- Part No.:
- MAX325CPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX325CPA+.pdf
- Description:
- IC SW SPST-NO/NCX2 60OHM 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:206
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Product details
Overview
MAX325CPA+ 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 switching, and 100pA max off-leakage at +25°C - enabling high-fidelity signal routing in battery-powered audio/video systems and precision data acquisition.
For engineers reviewing the MAX325CPA+ datasheet, MAX325CPA+ pinout, MAX325CPA+ application, or MAX325CPA+ equivalent, key selection criteria include its dual-configuration topology, 150ns max tON/100ns max tOFF timing, 2Ω max RON matching, and 8-pin plastic DIP package compatibility with legacy test and military radio designs.
Technical Context
The MAX325CPA+ integrates two independent CMOS analog switches sharing a common V+ and GND, with separate logic inputs (IN1, IN2) controlling each channel's NO/NC state. Its break-before-make architecture ensures no transient shorting between COM1 and COM2 during switching - critical for preventing signal glitches in guidance and control systems.
It operates rail-to-rail on 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 temperature and signal voltage range - making it suitable for sample-and-hold circuits and +3V/+5V DAC/ADC interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +2.7V to +16V - enables direct integration into 3.3V, 5V, and 12V systems without level-shifting. |
| On-Resistance (RON) | 60Ω max at +25°C, 75Ω max over full temp range - ensures minimal signal attenuation in precision sensor front-ends. |
| RON Matching | 2Ω max between channels - preserves amplitude balance in differential or dual-path signal routing. |
| Charge Injection | 5pC max - reduces settling error in sample-and-hold and multiplexed ADC applications. |
| Switching Speeds | tON ≤ 150ns, tOFF ≤ 100ns - supports >5MHz analog multiplexing in test equipment and comms systems. |
| Leakage Current | 100pA max at +25°C, <2.5nA at +85°C - maintains accuracy in high-impedance sensor interfaces. |
| ESD Rating | 2000V per Method 3015.7 - provides robust handling in manufacturing and field-repair environments. |
Pinout & Package
MAX325CPA+ uses an 8-pin plastic DIP (Dual In-line Package) with 0.300-inch width, RoHS-compliant lead finish, and through-hole mounting. Pin 1 is NO1 (normally open terminal for Switch 1); Pin 2 is COM1 (common terminal for Switch 1); Pin 3 is IN2 (logic input for Switch 2); Pin 4 is GND; Pin 5 is NC2 (normally closed terminal for Switch 2); Pin 6 is COM2 (common terminal for Switch 2); Pin 7 is IN1 (logic input for Switch 1); Pin 8 is V+ (positive supply).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NO1) | Normally Open analog terminal - Switch 1 output when IN1 = high | Connects to signal path only when enabled; isolates COM1 when inactive. |
| Pin 2 (COM1) | Common analog terminal - bidirectional I/O for Switch 1 | Serves as input or output; must be routed to system signal node requiring switching. |
| Pin 3 (IN2) | Logic input - controls NO2/NC2 state (active-high) | Accepts TTL/CMOS levels at +5V; requires rail-to-rail drive at other supplies. |
| Pin 4 (GND) | Ground reference - analog and digital return | Must be low-impedance; shared with system ground plane to minimize noise coupling. |
| Pin 5 (NC2) | Normally Closed analog terminal - Switch 2 output when IN2 = low | Provides default signal path; breaks connection only when IN2 is asserted. |
| Pin 6 (COM2) | Common analog terminal - bidirectional I/O for Switch 2 | Independent of COM1; allows simultaneous routing of two isolated analog signals. |
| Pin 7 (IN1) | Logic input - controls NO1/NC1 state (active-high) | Independent control enables asynchronous switching of two signal paths. |
| Pin 8 (V+) | Positive supply - powers analog and logic sections | Must be applied before analog/logic signals; decoupling capacitor required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Break-before-make switching | Guaranteed 2ns minimum delay between channel disconnect and reconnect - eliminates signal shorting in safety-critical control paths. |
| Low power consumption | <5μW quiescent - extends battery life in portable heads-up displays and handheld test gear. |
| Rail-to-rail analog range | 0V to V+ signal handling - preserves full dynamic range of ±10V DACs and unipolar sensors without clipping. |
| TTL/CMOS logic compatibility | Validated at +5V supply - simplifies interface with microcontrollers and FPGAs without external level shifters. |
| High off-isolation | 72dB at 1MHz - suppresses crosstalk between audio/video channels in PBX and communications systems. |
| Low capacitance | 9pF COFF, 22pF CCOM(ON) - minimizes bandwidth degradation and phase shift in RF-adjacent signal chains. |
Applications
| Audio and Video Switching | Battery-Operated Systems |
|---|---|
|
Use Scenario: Routing stereo audio or composite video between multiple sources and outputs in portable media players. IC Role / Device Role / Timing Role: Dual-channel analog switch providing independent path selection with sub-150ns switching to avoid audible clicks or video glitches. Use Value: Break-before-make prevents momentary shorts between source grounds, preserving signal integrity and eliminating pop/crackle artifacts. |
Use Scenario: Signal conditioning and multiplexing in handheld multimeters, gas detectors, and medical glucose monitors. IC Role / Device Role / Timing Role: Low-leakage, low-power analog switch enabling high-impedance sensor interfacing and battery-life optimization. Use Value: 100pA max off-leakage and 5μW power ensure stable readings over extended operating time without calibration drift. |
| Sample-and-Hold Circuits | Military Radios |
|
Use Scenario: Sampling analog sensor outputs prior to digitization in industrial process controllers and aerospace telemetry units. IC Role / Device Role / Timing Role: Precision switch delivering low charge injection (≤5pC) and flat RON to minimize hold-step error and droop. Use Value: 2Ω RON matching ensures consistent sampling across dual ADC channels, improving measurement repeatability. |
Use Scenario: Signal routing in ruggedized HF/VHF transceivers requiring ESD-hardened, wide-temperature components. IC Role / Device Role / Timing Role: Dual SPST switch managing antenna diversity, filter bank selection, and receive/transmit path isolation. Use Value: 2000V ESD rating and -40°C to +85°C extended temp grade (EPA variant) support field-deployable reliability. |
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 |
|---|---|---|---|
| MAX323CPA+ | Dual NO configuration; no break-before-make; identical package and pinout | Used where both paths require active-high enable without default continuity | Select when dual normally-open behavior is required and break-before-make is unnecessary. |
| MAX324CPA+ | Dual NC configuration; no break-before-make; identical package and pinout | Preferred in fail-safe systems needing default signal path until actively interrupted | Choose when continuous signal flow is mandatory until commanded interruption (e.g., emergency cutoff). |
Compared with MAX325CPA+, MAX323CPA+ offers dual NO switching ideal for active-multiplexing, while MAX324CPA+ provides dual NC for default-path redundancy; only MAX325CPA+ guarantees break-before-make for glitch-free transitions in mixed-signal control loops.
Availability
MAX325CPA+ is available at Aetrix Electronics and suitable for battery-operated systems, military radios, sample-and-hold circuits, and audio/video switching requiring stable component supply across industrial and defense programs.
Supply support for MAX325CPA+ 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 MAX323/MAX324/MAX325 family was engineered for precision, low-power, single-supply analog signal routing in space-constrained, battery-sensitive, and high-reliability applications - emphasizing RON flatness, leakage control, and ESD robustness.
FAQ
What is the maximum supply voltage for MAX325CPA+ and what happens if exceeded?
The absolute maximum supply voltage for MAX325CPA+ is +17V. Exceeding this rating risks permanent damage due to internal junction breakdown. The device is rated for continuous operation from +2.7V to +16V; operation at 16V is fully specified and supported across temperature ranges. Always observe the 0.3V diode clamp limit on analog pins relative to V+ and GND to prevent forward conduction and current overload. MAX325CPA+ includes internal protection diodes, but sustained overvoltage degrades long-term reliability.
Does MAX325CPA+ support rail-to-rail analog signal switching?
Yes, MAX325CPA+ supports rail-to-rail analog signal switching from 0V to V+ - meaning signals spanning the full supply range can pass through with minimal distortion or on-resistance variation. This is confirmed by typical RON vs. VCOM curves showing flat performance across 0–12V at +5V and +12V supplies. The specification guarantees analog signal range as 0V to V+, and bidirectional operation allows any pin (NO, NC, COM) to serve as input or output. MAX325CPA+ maintains ≤6Ω RON flatness over this range, ensuring consistent gain and linearity.
Is MAX325CPA+ pin-compatible with other devices in the MAX323/MAX324/MAX325 family?
Yes, MAX325CPA+ is pin-compatible with MAX323CPA+ and MAX324CPA+ in the 8-pin plastic DIP package - all share identical pin assignments, footprint, and solder pad layout. This allows drop-in replacement in existing PCBs when changing between NO/NO, NC/NC, or NO/NC configurations. However, functional behavior differs: MAX325CPA+ provides guaranteed break-before-make, while MAX323CPA+ and MAX324CPA+ do not. System-level validation is required to confirm timing and signal integrity compliance after substitution. MAX325CPA+ remains functionally distinct despite mechanical compatibility.
What is the guaranteed break-before-make time for MAX325CPA+ and how is it measured?
The guaranteed break-before-make time for MAX325CPA+ is 2ns minimum, tested under RL = 300Ω and CL = 35pF conditions at +25°C. This parameter ensures that the NC path opens before the NO path closes during logic transitions, preventing momentary shorting between COM1 and COM2. It is validated using the test circuit in Figure 3 of the datasheet, with fast-edge logic inputs and controlled load conditions. The specification holds across temperature and supply voltage, and MAX325CPA+ is the only member of the MAX323/MAX324/MAX325 family with this guarantee - critical for fault-tolerant signal routing in guidance and control systems.
Can MAX325CPA+ operate from a +3.3V supply and what are the key trade-offs?
Yes, MAX325CPA+ is fully specified for +3.3V operation, with verified performance including 175Ω max RON, 400ns max tON, and 125ns max tOFF at +3.3V and +25°C. Trade-offs versus +5V operation include higher on-resistance (increasing insertion loss), slower switching speeds (reducing usable bandwidth), and reduced noise margin on logic inputs - requiring rail-to-rail drive (0V/3.3V) rather than TTL levels. Leakage and charge injection remain unchanged. MAX325CPA+ maintains full functionality and guaranteed break-before-make at +3.3V, making it suitable for modern low-voltage embedded systems.
MAX325CPA+ 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX325CPA+ FAQ
1.How can I place an order for MAX325CPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX325CPA+ 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 MAX325CPA+ reliable?
The price and inventory of MAX325CPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX325CPA+ is usually 5 days.
3.What payment methods are accepted for MAX325CPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX325CPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX325CPA+?
MAX325CPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX325CPA+ 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 MAX325CPA+?
For technical support, including MAX325CPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX325CPA+ requirements.
6.How does Aetrix verify that MAX325CPA+ is sourced from the original manufacturer or authorized distributors?
All MAX325CPA+ 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 MAX325CPA+ meets industry standards.
7.What is the process for return or replacement of MAX325CPA+?
All MAX325CPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX325CPA+, 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 MAX325CPA+ part is unused and in its original packaging.
Return procedure for MAX325CPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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