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Analog Devices Inc./Maxim Integrated MAX325C/D
- Part No.:
- MAX325C/D
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- Die
- Datasheet:
-
MAX325C/D.pdf
- Description:
- IC SWITCH SPST-NO/NCX2 60OHM DIE
- Quantity:
- Payment:
- Shipping:
Inventory:2,393
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Product details
Overview
MAX325C/D 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), 150ns max tON, and 100pA max off-leakage - enabling high-fidelity signal routing in battery-powered test equipment and military radios.
For engineers reviewing the MAX325C/D datasheet, MAX325C/D pinout, MAX325C/D application, or MAX325C/D equivalent, key selection criteria include verified break-before-make behavior, sub-2Ω RON matching at +25°C, leakage stability over temperature (≤2.5nA at +85°C), and compatibility with 3V/5V/12V single-rail logic interfaces.
Technical Context
The MAX325C/D implements complementary MOSFET switch pairs per channel with rail-to-rail analog signal handling (0V to V+), supporting bidirectional signal flow on COM, NO, and NC terminals. Its internal logic accepts TTL/CMOS-compatible inputs when V+ = 5V, and requires rail-aligned logic drive otherwise (e.g., 0V/3.3V for 3.3V supply).
Break-before-make switching is architecturally enforced only in the MAX325 variant, with 2ns typical delay between channel transitions under RL = 300Ω and CL = 35pF loading. Charge injection is minimized via matched transistor geometry and layout symmetry, achieving ≤5pC across the full analog range.
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 DAC/ADC interfaces. |
| RON Matching | <2Ω max at +25°C - enables accurate differential or ratiometric measurements without calibration. |
| Charge Injection | ≤5pC - prevents voltage glitches in sample-and-hold circuits and high-impedance sensor front-ends. |
| Switching Speed | tON ≤150ns, tOFF ≤100ns - supports multiplexing of audio, video, and fast control signals without distortion. |
| Off-Leakage Current | 100pA max at +25°C, ≤2.5nA at +85°C - preserves accuracy in microamp-level current-sensing and high-Z bias networks. |
| ESD Rating | >2000V per Method 3015.7 - provides robust handling during board assembly and field service. |
| Analog Signal Range | 0V to V+ - allows full-rail signal switching without clipping in single-supply systems. |
Pinout & Package
Dice form factor: bare die, no leadframe or molded package; intended for hybrid assembly or custom substrate mounting. Dimensions per chip topography: 1.90mm × 1.40mm (0.075″ × 0.055″); substrate tied to V+.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply rail | Must be applied before analog or logic signals; powers internal level shifters and defines analog signal ceiling (0V to V+). |
| GND | Ground reference | Return path for supply current and logic thresholds; substrate connection point. |
| IN1, IN2 | Channel control inputs | TTL/CMOS-compatible at 5V; require rail-aligned logic (0V/V+) at other supplies to minimize I+ and ensure reliable switching. |
| COM1, COM2 | Common analog terminals | Bidirectional signal ports; each connects to either NO1/NC1 or NO2/NC2 depending on logic state. |
| NO1, NO2 | Normally open switch terminals | Open-circuit when IN = low; connect to COMx only when INx = high - used for default-isolation paths. |
| NC1, NC2 | Normally closed switch terminals | Shorted to COMx when IN = low; disconnect when INx = high - provides default-connection redundancy in fail-safe designs. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed break-before-make | 2ns typical delay between NC and NO disconnection/reconnection - eliminates momentary short-circuits in dual-path signal routing. |
| Low on-resistance flatness | <6Ω max variation across 0V–V+ analog range - maintains consistent gain and linearity in variable-gain amplifiers and programmable filters. |
| Sub-100pA off-leakage | 100pA max at +25°C - critical for maintaining accuracy in picoamp-level photodiode or electrochemical sensor interfaces. |
| Single-supply flexibility | +2.7V to +16V operation - supports direct integration into 3.3V microcontroller systems and 12V industrial power rails without level-shifting. |
| TTL/CMOS logic compatibility | Verified at 5V supply; rail-aligned drive required at other voltages - simplifies interface design with FPGAs, MCUs, and ASICs. |
Applications
| Battery-Operated Test Equipment | Military Radio Signal Routing |
|---|---|
|
Use Scenario: Multiplexing calibrated reference voltages and sensor inputs in handheld multimeters and portable spectrum analyzers. IC Role / Device Role / Timing Role: Dual-channel analog switch providing isolated signal path selection with break-before-make assurance to prevent reference contamination. Use Value: 60Ω max RON and <2Ω matching preserve measurement accuracy; 5μW quiescent power extends battery life beyond 100 hours. |
Use Scenario: Switching RF front-end receive paths and antenna diversity feeds in manpack and vehicular radios operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Precision SPST switch managing low-noise amplifier bypass and filter bank selection under wide temperature and supply-voltage variation. Use Value: 2000V ESD rating withstands field handling; leakage ≤2.5nA at +85°C ensures stable bias in LNA stages. |
| Audio/Video Matrix Switching | +3V/+5V Data Acquisition Systems |
|
Use Scenario: Routing line-level analog audio and composite video signals in avionics displays and heads-up guidance systems. IC Role / Device Role / Timing Role: Bidirectional analog switch enabling clean signal pass-through with minimal crosstalk (85dB) and charge injection-induced pop suppression. Use Value: 9pF COFF and CCOM(OFF) minimize high-frequency signal degradation; 150ns tON supports real-time video frame switching. |
Use Scenario: Channel selection in multi-channel ADC drivers and DAC output buffers for industrial PLC analog I/O modules. IC Role / Device Role / Timing Role: Precision analog switch isolating individual sensor channels prior to digitization, with RON flatness ensuring uniform gain scaling. Use Value: RFLAT(ON) ≤6Ω guarantees ≤0.1% gain error across full input range; 0V–V+ signal handling matches 3.3V/5V ADC reference rails. |
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 | 8-pin SO package; same electrical specs, but includes molded plastic body and standard PCB mountability. | Preferred for prototyping and volume production where reflow soldering and automated optical inspection are required. | Select MAX325CSA when board-level assembly, thermal management, and long-term reliability validation are priorities over die-level integration. |
| ADG1419BCPZ-REEL7 | Single-supply 5V–16.5V operation; 4.7Ω typical RON, but no guaranteed break-before-make; 1.5pC charge injection. | Better suited for low-RON, low-charge-injection applications where BMB timing is not safety-critical (e.g., non-mission-critical data loggers). | Choose ADG1419BCPZ-REEL7 only if lower on-resistance and reduced glitch energy outweigh the absence of guaranteed break-before-make behavior. |
Compared with MAX325C/D, MAX325CSA offers identical analog performance in a manufacturable surface-mount package, while ADG1419BCPZ-REEL7 trades guaranteed BMB for lower RON and charge injection - making MAX325C/D uniquely suitable for fail-safe signal routing in military and test equipment where channel contention must be eliminated.
Availability
MAX325C/D is available at Aetrix Electronics and suitable for battery-operated test equipment, military radio signal routing, audio/video matrix switching, and +3V/+5V data acquisition systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX325C/D 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 precision instrumentation, industrial automation, aerospace, and communications markets.
The MAX323/MAX324/MAX325 family was engineered specifically for single-supply, low-leakage, low-distortion analog switching in portable and ruggedized systems - emphasizing rail-to-rail signal integrity, ESD robustness, and guaranteed timing behavior.
FAQ
What is the maximum supply voltage rating for MAX325C/D?
The MAX325C/D supports a continuous positive supply voltage from +2.7V to +16V, with an absolute maximum rating of +17V. Exceeding +17V risks permanent damage. Operation at 12V or 15V is fully specified, including RON, leakage, and switching speed - making MAX325C/D suitable for both 3.3V microcontroller interfaces and 12V industrial backplanes.
Does MAX325C/D provide guaranteed break-before-make timing?
Yes, MAX325C/D guarantees break-before-make timing with a typical delay of 2ns (max 5ns over temperature) between NC and NO transitions, measured under RL = 300Ω and CL = 35pF conditions. This behavior is intrinsic to the MAX325 variant's architecture and is explicitly documented in the datasheet - unlike MAX323 or MAX324, which lack this feature.
What is the leakage current specification for MAX325C/D at elevated temperature?
At +85°C, MAX325C/D guarantees COM on-leakage ≤10nA, COM off-leakage ≤5nA, and NO/NC off-leakage ≤40nA. At +25°C, all off-leakage parameters are ≤0.1nA (100pA). These values are 100% tested at hot temperature and correlated at room temperature - critical for high-impedance sensor and sample-and-hold applications.
Can MAX325C/D operate with 3.3V logic inputs when powered from a 5V supply?
No - when V+ = 5V, MAX325C/D requires logic inputs driven to 0V (low) and 2.4V–5V (high) to ensure TTL/CMOS compatibility and minimize supply current. Driving IN1/IN2 to 3.3V logic levels is acceptable only if V+ = 3.3V; otherwise, mismatched logic thresholds increase I+ and risk unreliable switching. Rail-aligned drive is mandatory for optimal performance.
Is the substrate connection of MAX325C/D internally tied to a specific terminal?
Yes, the substrate of the MAX325C/D dice is internally connected to the V+ terminal, as confirmed in the chip topography diagram on page 10 of the datasheet. This configuration requires that V+ be the highest potential node in the system to prevent forward-biasing substrate diodes - a critical constraint for proper biasing in hybrid or multilayer substrate assemblies.
MAX325C/D 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 (Typ)
- 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
MAX325C/D FAQ
1.How can I place an order for MAX325C/D through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX325C/D 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 MAX325C/D reliable?
The price and inventory of MAX325C/D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX325C/D is usually 5 days.
3.What payment methods are accepted for MAX325C/D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX325C/D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX325C/D?
MAX325C/D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX325C/D 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 MAX325C/D?
For technical support, including MAX325C/D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX325C/D requirements.
6.How does Aetrix verify that MAX325C/D is sourced from the original manufacturer or authorized distributors?
All MAX325C/D 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 MAX325C/D meets industry standards.
7.What is the process for return or replacement of MAX325C/D?
All MAX325C/D units undergo pre-shipment inspection (PSI). If there is an issue with MAX325C/D, 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 MAX325C/D part is unused and in its original packaging.
Return procedure for MAX325C/D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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