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Analog Devices Inc./Maxim Integrated MAX325CSA+T
- Part No.:
- MAX325CSA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX325CSA+T.pdf
- Description:
- IC SW SPST-NO/NCX2 60OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,232
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Product details
Overview
MAX325CSA+T 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, 150ns max tON, and 100pA max off-leakage - enabling high-fidelity signal routing in battery-powered test equipment and audio/video systems.
For engineers reviewing the MAX325CSA+T datasheet, MAX325CSA+T pinout, MAX325CSA+T application, or MAX325CSA+T equivalent, key selection criteria include verified break-before-make timing, RON matching under 2Ω at +25°C, leakage stability across -40°C to +85°C, and SO-8 package compatibility with automated SMT assembly.
Technical Context
The MAX325CSA+T integrates two independent CMOS SPST switches sharing a common V+ and GND, with separate logic inputs (IN1, IN2) controlling each channel's NO/NC state. Its internal architecture guarantees break-before-make operation exclusively for the MAX325 variant - critical for preventing momentary short-circuits during signal path reconfiguration.
It operates as a bidirectional analog switch: COM, NO, and NC pins support full-rail signal swing (0V to V+), with RON flatness ≤6Ω and matching ≤2Ω at +25°C under 5V supply. Charge injection is tightly controlled (<5pC) to minimize glitch-induced errors in sample-and-hold or DAC output switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | +2.7V to +16V single supply - supports direct integration into 3.3V, 5V, and 12V systems without level-shifting. |
| On-Resistance (RON) | 60Ω max at +25°C, 75Ω max over full temperature range - ensures minimal signal attenuation and gain error in precision sensor or DAC paths. |
| RON Matching | 2Ω max between channels at +25°C - enables matched gain/phase response in differential or dual-path signal conditioning. |
| Charge Injection | 5pC max - limits voltage step error in sample-and-hold circuits to <5mV with 1nF hold capacitor. |
| Break-Before-Make Delay | 2ns min (RL = 300Ω, CL = 35pF) - prevents signal contention during channel switching in multiplexed data acquisition. |
| Off-Leakage Current | 100pA max at +25°C, 5nA max at +85°C - preserves accuracy in high-impedance sensor front-ends and battery-monitoring circuits. |
| Switching Speed | tON ≤150ns, tOFF ≤100ns at +25°C - supports >3MHz multiplexing rates in real-time test instrumentation. |
Pinout & Package
MAX325CSA+T is housed in an 8-pin SO (Small Outline) package, RoHS-compliant, with standard 1.27mm lead pitch and JEDEC MS-012AC footprint. The package supports reflow soldering and provides thermal dissipation up to 471mW at +70°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NO1) | Normally Open analog terminal, Channel 1 | Connects to COM1 only when IN1 = logic high; used for default-open signal routing paths. |
| 2 (COM1) | Common analog terminal, Channel 1 | Bidirectional I/O node - serves as input or output depending on signal flow direction in analog mux applications. |
| 3 (IN2) | Logic input, Channel 2 | TTL/CMOS-compatible control signal; drives NC2/NO2 state - low = NC closed, high = NO closed. |
| 4 (GND) | Analog and digital ground reference | Single ground plane required; decoupling capacitor (0.1μF) must be placed adjacent to pin 4 for noise immunity. |
| 5 (NO2) | Normally Open analog terminal, Channel 2 | Connects to COM2 only when IN2 = logic high; pairs with NC2 to implement break-before-make switching. |
| 6 (COM2) | Common analog terminal, Channel 2 | Independent of COM1 - enables dual-channel isolation in multi-signal routing or redundancy switching. |
| 7 (IN1) | Logic input, Channel 1 | Directly controls NO1/NC1 state; compatible with 3.3V or 5V logic without external level shifters. |
| 8 (V+) | Positive supply rail | Supplies both analog switch core and logic interface; must be stabilized with ≥1μF bulk + 0.1μF ceramic capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed break-before-make | Exclusive to MAX325 family - eliminates signal shorting during channel transitions in safety-critical guidance systems. |
| Low charge injection (<5pC) | Reduces settling error in precision sample-and-hold stages, enabling 16-bit ADC interface without recalibration. |
| RON flatness <6Ω | Maintains consistent gain across full 0V–V+ analog range - essential for linearity in video signal switching and sensor calibration. |
| 2000V ESD rating (HBM) | Enables robust handling in manufacturing and field service without additional protection circuitry on PCB. |
| Single-supply +2.7V to +16V | Eliminates need for dual ±5V rails in portable instrumentation - simplifies power architecture and reduces BOM cost. |
Applications
| Audio Signal Routing | Test Equipment Multiplexing |
|---|---|
|
Use Scenario: Switching between multiple microphone inputs or speaker outputs in portable audio analyzers. IC Role / Device Role: Dual-channel analog signal path selector with break-before-make to prevent pop/click artifacts. Use Value: 60Ω RON and <5pC charge injection preserve SNR >95dB across 20Hz–20kHz bandwidth. |
Use Scenario: Routing DUT signals to different measurement instruments (oscilloscope, DMM, spectrum analyzer) in ATE systems. IC Role / Device Role: Precision SPST switch enabling fast, low-distortion signal path reconfiguration. Use Value: 150ns tON and 2Ω RON matching ensure timing-critical measurements remain synchronized across channels. |
| Sample-and-Hold Circuits | Military Radio Front-Ends |
|
Use Scenario: Sampling analog sensor outputs before digitization in environmental monitoring nodes. IC Role / Device Role: Low-leakage, low-injection switch isolating hold capacitor during acquisition phase. Use Value: 100pA max off-leakage and <5pC charge injection limit hold-step error to <0.01% FS for 12-bit accuracy. |
Use Scenario: Selecting between antenna feeds or IF paths in ruggedized HF/VHF transceivers. IC Role / Device Role: Radiation-tolerant analog switch supporting -40°C to +85°C industrial temp grade. Use Value: 2000V HBM ESD rating and guaranteed operation at 16V supply enable reliable field deployment without derating. |
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 |
|---|---|---|---|
| MAX325ESA+ | Same electrical specs, but rated for -40°C to +85°C operating range (vs. 0°C to +70°C for MAX325CSA+T). | Suitable for extended-temperature industrial or automotive environments where ambient exceeds +70°C. | Select MAX325ESA+ when thermal margin is required beyond commercial grade; identical pinout and layout. |
| ADG1419BRUZ | Higher RON (1.3Ω typ), lower leakage (1pA typ), but requires dual ±15V supplies or single 30V supply - not single +2.7V–+16V compatible. | Used in ultra-precision lab equipment where sub-ohm RON and femtoamp leakage outweigh supply complexity. | Choose ADG1419BRUZ only if supply architecture allows dual rails and RON <2Ω is mandatory; not drop-in replaceable. |
Compared with MAX325ESA+, the MAX325CSA+T offers identical functionality at lower cost for commercial-temperature applications; compared with ADG1419BRUZ, it trades RON performance for single-supply simplicity and broader voltage flexibility - making it optimal for portable, battery-powered, and cost-sensitive designs.
Availability
MAX325CSA+T is available at Aetrix Electronics and suitable for battery-operated systems, audio/video switching, and test equipment requiring stable component supply with commercial-temperature qualification and SO-8 packaging.
Supply support for MAX325CSA+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, communications, automotive, and healthcare markets since 1965.
The MAX323/MAX324/MAX325 series was engineered for precision single-supply analog switching in portable and space-constrained systems - emphasizing low power, low distortion, and guaranteed break-before-make timing for signal integrity.
FAQ
What is the guaranteed break-before-make timing specification for MAX325CSA+T?
The MAX325CSA+T guarantees a minimum break-before-make delay of 2ns under RL = 300Ω and CL = 35pF conditions, as specified in the Electrical Characteristics table. This timing ensures no overlap between NC and NO conduction states during switching - a feature exclusive to the MAX325 family and confirmed in the truth tables and functional diagrams of the official datasheet.
Does MAX325CSA+T support rail-to-rail analog signal switching?
Yes, MAX325CSA+T supports analog signal switching from 0V to V+ (full rail-to-rail), with RON flatness ≤6Ω across that range. This is validated in the Typical Operating Characteristics plots (Figure MAX323-01 and MAX323-02) and explicitly stated in the Applications Information section - enabling use in precision DAC output buffering and sensor signal conditioning without clipping.
What is the maximum allowable supply voltage for MAX325CSA+T, and what happens if exceeded?
The absolute maximum supply voltage for MAX325CSA+T is +17V, per the Absolute Maximum Ratings table. Exceeding this risks permanent damage due to junction breakdown. Operation above +16V is not characterized or guaranteed - even brief transients beyond +17V may degrade ESD protection diodes or oxide layers, compromising long-term reliability in production systems.
Can MAX325CSA+T be used with a 3.3V logic interface while powered from a 5V supply?
Yes - the MAX325CSA+T logic inputs (IN1, IN2) are TTL/CMOS compatible at +5V supply, with VINL ≤0.8V and VINH ≥2.4V. A 3.3V logic driver meets these thresholds directly, requiring no level shifter. However, driving inputs to full 5V rails further minimizes power consumption, as noted in the Applications Information section.
Is the SO-8 package of MAX325CSA+T RoHS-compliant and lead-free?
Yes, the "+T" suffix in MAX325CSA+T denotes RoHS-compliant, lead-free construction per JEDEC J-STD-609. The package uses matte tin lead finish and conforms to EU Directive 2011/65/EU. This is confirmed in the Package Information section and Maxim Integrated (now Analog Devices) product change notices for the CSA+T variant.
MAX325CSA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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-SOIC
MAX325CSA+T FAQ
1.How can I place an order for MAX325CSA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX325CSA+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 MAX325CSA+T reliable?
The price and inventory of MAX325CSA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX325CSA+T is usually 5 days.
3.What payment methods are accepted for MAX325CSA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX325CSA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX325CSA+T?
MAX325CSA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX325CSA+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 MAX325CSA+T?
For technical support, including MAX325CSA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX325CSA+T requirements.
6.How does Aetrix verify that MAX325CSA+T is sourced from the original manufacturer or authorized distributors?
All MAX325CSA+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 MAX325CSA+T meets industry standards.
7.What is the process for return or replacement of MAX325CSA+T?
All MAX325CSA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX325CSA+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 MAX325CSA+T part is unused and in its original packaging.
Return procedure for MAX325CSA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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