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Analog Devices Inc./Maxim Integrated MAX325CSA
- Part No.:
- MAX325CSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX325CSA.pdf
- Description:
- IC SW SPST-NO/NCX2 60OHM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,159
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Product details
Overview
MAX325CSA from Analog Devices is a precision dual single-pole single-throw (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 at +25°C - ideal for precision signal routing in battery-powered instrumentation and mixed-signal interfaces.
For engineers reviewing the MAX325CSA datasheet, MAX325CSA pinout, MAX325CSA application, or MAX325CSA equivalent, key selection criteria include verified break-before-make timing, RON matching under 2Ω at +25°C, leakage performance across temperature, and SO-8 package compatibility with automated SMT assembly.
Technical Context
The MAX325CSA implements complementary MOSFET switch pairs per channel with rail-to-rail analog signal handling (0V to V+), enabling bidirectional signal flow on COM, NO, and NC terminals. Its internal logic accepts TTL/CMOS-compatible inputs when powered from +5V, while rail-to-rail drive is required at other supply voltages to minimize power consumption and ensure reliable switching.
Break-before-make timing is guaranteed only for the MAX325 variant (2ns min, 5ns max at +25°C with RL = 300Ω, CL = 35pF), preventing momentary shorting during channel transitions - a critical feature for multiplexer and sample-and-hold applications where signal integrity must be preserved across switching events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 60Ω max at +25°C, 75Ω max over full temp range - ensures minimal signal attenuation and gain error in precision analog paths. |
| RON Matching | <2Ω max at +25°C - enables accurate differential or ratiometric measurements between channels. |
| Charge Injection | <5pC - limits voltage glitch on high-impedance nodes (e.g., sample-and-hold capacitors), preserving acquisition accuracy. |
| Turn-On/Off Time | tON <150ns, tOFF <100ns at +25°C - supports >5MHz switching rates in test equipment and fast data acquisition systems. |
| Off-Leakage Current | 100pA max at +25°C, 5nA max at +85°C - maintains signal integrity in high-impedance sensor front-ends and battery-monitoring circuits. |
| Supply Range | +2.7V to +16V single supply - eliminates need for dual rails in portable +3.3V/+5V/+12V systems. |
| ESD Rating | >2000V per Method 3015.7 - enhances robustness during handling and board-level integration. |
Pinout & Package
MAX325CSA is housed in an 8-pin Small Outline (SO) package, 150-mil body width, with standard SOIC footprint (JEDEC MS-012). Pin 1 is located at the top-left corner with notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NO1 | Normally open analog terminal of Channel 1 - connects to COM1 only when IN1 = logic high. |
| 2 | COM1 | Common analog terminal of Channel 1 - bidirectional I/O node shared with NO1 and NC1. |
| 3 | IN2 | Logic input controlling Channel 2 - high enables NC2 connection, low enables NO2 connection (inverted logic sense). |
| 4 | GND | Ground reference for logic and analog sections - must be low-impedance return path for leakage and switching currents. |
| 5 | NO2 | Normally open analog terminal of Channel 2 - connects to COM2 only when IN2 = logic low. |
| 6 | COM2 | Common analog terminal of Channel 2 - bidirectional I/O node shared with NO2 and NC2. |
| 7 | IN1 | Logic input controlling Channel 1 - high enables NO1 connection, low enables NC1 connection (inverted logic sense). |
| 8 | V+ | Positive supply rail - powers analog switches and logic interface; absolute max 17V. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed break-before-make | Ensures no overlap between NO and NC conduction in MAX325CSA - prevents signal shorting during channel switching in multiplexed ADC/DAC interfaces. |
| RON flatness <6Ω | Maintains consistent on-resistance across full 0V–V+ analog signal range - critical for linearity in audio and video signal paths. |
| TTL/CMOS logic compatible | Accepts standard +5V logic thresholds (VINH ≥ 2.4V, VINL ≤ 0.8V) without level-shifting - simplifies interface with microcontrollers and FPGAs. |
| Low power consumption <5μW | Enables always-on operation in battery-powered systems (e.g., handheld test gear) with negligible impact on runtime. |
| 2000V ESD protection | Reduces risk of field failure during PCB handling and system integration - meets industrial electrostatic discharge requirements. |
Applications
| Battery-Operated Instrumentation | Audio Signal Routing |
|---|---|
Use Scenario: Portable multimeter front-end selecting between voltage, current, and resistance measurement paths. IC Role / Device Role / Timing Role: Dual SPST switch isolating analog signal chains while maintaining low RON and sub-pA leakage for accurate DC measurements. Use Value: Break-before-make prevents cross-talk between measurement modes; 60Ω RON contributes <0.1% gain error in 10kΩ input impedance designs. | Use Scenario: Headphone amplifier output switching between stereo sources (e.g., Bluetooth and AUX). IC Role / Device Role / Timing Role: Bidirectional analog switch routing line-level audio signals with minimal distortion and pop/click suppression. Use Value: <5pC charge injection prevents audible transients; RON flatness <6Ω preserves frequency response flatness across 20Hz–20kHz. |
| Sample-and-Hold Circuits | Guidance System Signal Conditioning |
Use Scenario: Precision ADC input stage capturing sensor outputs (e.g., inertial measurement unit) with minimal hold-mode droop. IC Role / Device Role / Timing Role: Low-leakage switch connecting sensor to sampling capacitor; break-before-make avoids charge sharing errors. Use Value: 100pA max off-leakage extends hold time beyond 100ms at 1nF; 150ns tON supports >1MSPS sampling rates. | Use Scenario: MIL-STD-1553 bus interface conditioning analog feedback signals from gyroscopes and accelerometers. IC Role / Device Role / Timing Role: High-reliability analog switch isolating fault-prone sensor lines while supporting wide supply range (+3.3V to +12V). Use Value: 2000V ESD rating withstands harsh avionics environments; -40°C to +85°C grade variants available for extended operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX325ESA | Same circuit architecture and pinout, but rated for -40°C to +85°C operating range and packaged in SO-8. | Required for industrial or automotive ambient conditions exceeding 70°C. | Select MAX325ESA when extended temperature operation is mandatory; MAX325CSA is cost-optimized for commercial-grade systems. |
| ADG1419BRMZ | Single-supply SPDT switch (not SPST), 0.9Ω typical RON, but higher 12V max supply and no guaranteed break-before-make. | Suitable for low-RON, high-speed routing where break-before-make is not required. | Choose ADG1419BRMZ only if ultra-low on-resistance is prioritized over guaranteed transition safety; MAX325CSA remains preferred for fault-tolerant multiplexing. |
Compared with MAX325ESA, MAX325CSA offers identical functionality at lower cost for 0°C to +70°C use, while ADG1419BRMZ trades break-before-make assurance for lower RON - making MAX325CSA the optimal choice for precision, safety-critical analog routing where channel isolation during switching is non-negotiable.
Availability
MAX325CSA is available at Aetrix Electronics and suitable for battery-operated instrumentation, audio signal routing, and sample-and-hold circuits requiring stable component supply and long-term production continuity.
Supply support for MAX325CSA 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 aerospace markets.
The MAX325CSA belongs to the MAX323/MAX324/MAX325 family of precision single-supply SPST analog switches, engineered for low-leakage, low-distortion signal routing in portable and high-reliability systems.
FAQ
What is the guaranteed break-before-make timing specification for MAX325CSA?
The MAX325CSA guarantees a break-before-make delay of 2ns minimum and 5ns maximum at +25°C with RL = 300Ω and CL = 35pF. This parameter is unique to the MAX325 variant and ensures no overlap between NO and NC conduction paths during logic transitions - a critical requirement for avoiding signal shorts in multiplexed analog systems. The MAX325CSA datasheet confirms this value under Electrical Characteristics, Dynamic section.
Does MAX325CSA support rail-to-rail analog signal switching?
Yes, MAX325CSA supports rail-to-rail analog signal switching from 0V to V+, with guaranteed performance across the full +2.7V to +16V supply range. The analog signal range is explicitly specified as 0 to V+ in the datasheet's Electrical Characteristics table, and typical operating curves (e.g., RON vs. VCOM) confirm minimal variation across the entire voltage span. This capability allows direct interfacing with sensors, DACs, and ADCs without external level-shifting.
What is the maximum allowable supply voltage for MAX325CSA, and what happens if exceeded?
The absolute maximum supply voltage for MAX325CSA is +17V, as stated in the Absolute Maximum Ratings table. Exceeding this voltage risks permanent device damage due to junction breakdown or oxide stress. The datasheet warns that stresses beyond absolute maximum ratings may cause irreversible harm, and functional operation above +17V is neither guaranteed nor characterized. For reliable operation, V+ must remain within +2.7V to +16V - the recommended operating range where all specifications (e.g., RON, leakage, timing) are fully guaranteed.
Can MAX325CSA be used with a +3.3V logic supply?
Yes, MAX325CSA can operate with a +3.3V supply, but TTL compatibility is not guaranteed at this voltage. The datasheet specifies that logic inputs must be driven rail-to-rail (0V to +3.3V) to ensure proper switching and minimize power consumption. At +3.3V, VINH = 2.4V and VINL = 0.6V are defined, so microcontroller GPIOs or FPGA outputs meeting those thresholds will function correctly. However, standard 5V-tolerant TTL drivers may not provide sufficient high-level voltage margin and should be verified against the input threshold specs in the +3.3V Electrical Characteristics table.
What is the thermal derating for MAX325CSA in its SO-8 package?
The MAX325CSA in SO-8 package has a continuous power dissipation limit of 471mW at +70°C, with a thermal derating factor of 5.88mW/°C above that temperature. This means usable power dissipation decreases linearly as ambient temperature rises - for example, at +85°C, maximum allowed power drops to 471mW − (15°C × 5.88mW/°C) = 383mW. This derating is based on the package's thermal resistance and ensures safe junction temperature operation under sustained load conditions, as documented in the Absolute Maximum Ratings section.
MAX325CSA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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 FAQ
1.How can I place an order for MAX325CSA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX325CSA 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 reliable?
The price and inventory of MAX325CSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX325CSA is usually 5 days.
3.What payment methods are accepted for MAX325CSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX325CSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX325CSA?
MAX325CSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX325CSA 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?
For technical support, including MAX325CSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX325CSA requirements.
6.How does Aetrix verify that MAX325CSA is sourced from the original manufacturer or authorized distributors?
All MAX325CSA 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 meets industry standards.
7.What is the process for return or replacement of MAX325CSA?
All MAX325CSA units undergo pre-shipment inspection (PSI). If there is an issue with MAX325CSA, 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 part is unused and in its original packaging.
Return procedure for MAX325CSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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