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Analog Devices Inc./Maxim Integrated MAX322CUA
- Part No.:
- MAX322CUA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX322CUA.pdf
- Description:
- IC SW SPST-NO/NCX2 35OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,041
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Product details
Overview
MAX322CUA from Maxim Integrated is a precision dual-supply SPST analog switch featuring one normally open (NO) and one normally closed (NC) channel, designed for ±3V to ±8V operation. It delivers 35Ω max on-resistance, <5pC charge injection, guaranteed break-before-make switching, and 100pA max leakage - enabling high-fidelity signal routing in ±5V DAC/ADC interfaces and battery-powered test equipment.
For engineers reviewing the MAX322CUA datasheet, MAX322CUA pinout, MAX322CUA application, or MAX322CUA equivalent, key selection criteria include bipolar supply compatibility, sub-5pC charge injection for sample-and-hold integrity, guaranteed break-before-make timing (2–5ns), and µMAX-8 package suitability for space-constrained portable instrumentation.
Technical Context
The MAX322CUA implements complementary MOSFET switch pairs with matched RON (<2Ω) and flat RON (<4Ω) across ±3V to ±8V supplies, ensuring minimal signal distortion over full analog voltage range (V− to V+). Its logic interface accepts rail-referenced inputs (VINH = V+ − 1.5V, VINL = V+ − 2.5V) and tolerates direct connection to V− without damage.
Break-before-make operation is architecturally enforced in the MAX322 variant only, preventing momentary shorting between NO and NC paths during state transitions - critical for protecting sensitive downstream circuitry in guidance systems and military radios. All channels are fully bidirectional with 9pF off-capacitance and 72dB off-isolation at 1MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±3V to ±8V dual supply - supports legacy ±5V systems and extended-range industrial rails without level-shifting. |
| On-Resistance (RON) | 35Ω max at ±5V - ensures <0.1% gain error in 10kΩ impedance signal paths; 16Ω typical improves power efficiency. |
| Charge Injection | 5pC max - limits voltage glitch in sample-and-hold circuits to <5mV with 1nF hold capacitor. |
| Leakage Current | 100pA max at +25°C, <2.5nA at +85°C - preserves accuracy in high-impedance sensor front-ends and battery-monitoring nodes. |
| Switching Speed | tON <150ns, tOFF <100ns - enables multiplexing of audio-band signals (≤3MHz) with minimal settling delay. |
| Break-Before-Make Delay | 2–5ns (guaranteed) - eliminates cross-conduction risk when toggling between redundant signal paths in control systems. |
| ESD Protection | >2000V per Method 3015.7 - withstands handling and board-level ESD events without external protection diodes. |
Pinout & Package
MAX322CUA is housed in an 8-pin µMAX package (3mm × 3mm, 0.5mm pitch), optimized for compact portable instrumentation and high-density PCB layouts. The package features exposed paddle for thermal enhancement and RoHS-compliant lead-free finish (suffix + indicates lead-free; standard MAX322CUA is leaded).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NO1 (Normally Open Terminal 1) | Analog path connected to COM1 only when IN1 = logic low; used for default-open signal routing. |
| 2 | COM1 (Common Terminal 1) | Bidirectional analog I/O node for Channel 1; supports full V− to V+ signal swing. |
| 3 | IN2 (Logic Input 2) | CMOS-compatible control input for Channel 2; referenced to V+/V−, accepts V− to V+ levels. |
| 4 | V− (Negative Supply) | Ground reference for negative rail; must be applied before analog/logic signals to prevent latch-up. |
| 5 | V+ (Positive Supply) | Positive rail input; absolute max (V− − 0.3V) to +17V; sequencing priority over V−. |
| 6 | COM2 (Common Terminal 2) | Bidirectional analog I/O node for Channel 2; electrically isolated from COM1. |
| 7 | IN1 (Logic Input 1) | CMOS-compatible control input for Channel 1; inverted logic sense relative to MAX320/MAX321. |
| 8 | NC2 (Normally Closed Terminal 2) | Analog path connected to COM2 when IN2 = logic low; provides fail-safe continuity in fault-tolerant designs. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed Break-Before-Make | Ensures no overlap between NO1 and NC2 conduction during Channel 1/2 switching - prevents short-circuit transients in power monitoring circuits. |
| RON Matching & Flatness | <2Ω matching and <4Ω flatness minimize gain mismatch and harmonic distortion in differential signal paths (e.g., ±5V ADC drivers). |
| Bipolar Supply Flexibility | Operates from ±3V to ±8V without external biasing - simplifies integration into mixed-signal systems with diverse rail requirements. |
| Low Power Consumption | <1.25mW total quiescent power - extends battery life in handheld test gear and portable medical sensors. |
| High Off-Isolation | 72dB at 1MHz - suppresses crosstalk between audio/video channels and RF-sensitive analog sections in comms modules. |
Applications
| Battery-Operated Test Equipment | ±5V Precision Data Acquisition |
|---|---|
|
Use Scenario: Portable multimeter front-end switching between voltage, current, and resistance measurement paths. IC Role / Device Role / Timing Role: Dual-channel analog switch isolating signal conditioning blocks while maintaining low-offset, low-leakage performance. Use Value: 100pA leakage and 35Ω RON preserve microamp-level current measurement accuracy and <0.01% voltage reading linearity. |
Use Scenario: Multiplexing inputs to ±5V SAR ADCs in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Precision SPST switch enabling simultaneous sampling of multiple sensor outputs with minimal charge injection error. Use Value: 5pC charge injection limits hold-step error to <1 LSB in 16-bit systems using 1nF sampling capacitors. |
| Military Radio Signal Routing | Heads-Up Display (HUD) Video Switching |
|
Use Scenario: Selecting between primary and backup RF receive paths in manpack radios operating across −40°C to +85°C. IC Role / Device Role / Timing Role: Fail-safe analog switch providing NC path continuity during power-up/reset and NO path activation under normal operation. Use Value: Guaranteed break-before-make and >2000V ESD rating ensure reliable path isolation in harsh electromagnetic environments. |
Use Scenario: Switching composite video signals between HUD projector and diagnostic test port in avionics displays. IC Role / Device Role / Timing Role: Low-capacitance (9pF off) analog switch minimizing signal rise-time degradation in 6MHz video bandwidth paths. Use Value: 150ns tON and 72dB off-isolation prevent ghosting and crosstalk between live display and maintenance video feeds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX322ESA | SO-8 package (4.9mm × 6.0mm), −40°C to +85°C temp range, same electrical specs. | Better suited for industrial temperature-grade PCBs requiring reflow compatibility and higher reliability screening. | Select MAX322ESA when extended temperature operation or JEDEC-standard SOIC footprint is required. |
| ADG1419BRMZ | Single-supply only (±15V max), 1.5Ω typical RON, but no guaranteed break-before-make; 10-lead MSOP. | Lacks bipolar supply flexibility and BMB timing guarantee - unsuitable for fail-safe ±5V DAC/ADC multiplexing. | Choose ADG1419BRMZ only for single-rail high-precision applications where ultra-low RON outweighs BMB requirement. |
Compared with MAX322CUA, MAX322ESA offers identical functionality in a larger SO-8 package with extended temperature range, while ADG1419BRMZ trades bipolar operation and BMB assurance for lower on-resistance in single-supply systems - making MAX322CUA uniquely suited for compact, fail-safe ±5V signal routing.
Availability
MAX322CUA is available at Aetrix Electronics and suitable for battery-operated test equipment, ±5V precision data acquisition systems, and military radio signal routing requiring stable component supply across commercial temperature grades.
Supply support for MAX322CUA 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
Maxim Integrated (now part of Analog Devices) is a fabless semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX320/MAX321/MAX322 family was engineered for precision bipolar analog switching in resource-constrained systems - emphasizing low leakage, low charge injection, and guaranteed timing behavior in ±5V data converter interfaces.
FAQ
What supply voltage ranges does the MAX322CUA support?
The MAX322CUA operates from ±3V to ±8V dual supplies, with absolute maximum ratings allowing V+ up to (V− − 0.3V) + 17V. It is specifically characterized at ±5V, delivering 35Ω max on-resistance and guaranteed break-before-make timing. Operation outside ±3V to ±8V requires validation per Absolute Maximum Ratings to avoid permanent damage.
Does the MAX322CUA provide break-before-make switching?
Yes, the MAX322CUA guarantees break-before-make operation with a 2–5ns delay between turn-off of one switch and turn-on of the other in each channel. This feature is intrinsic to the MAX322 variant's architecture and is explicitly documented in the Electrical Characteristics table - unlike MAX320 or MAX321, which lack this timing guarantee.
What is the maximum leakage current specification for MAX322CUA over temperature?
The MAX322CUA specifies 100pA max COM on-leakage and NO/NC off-leakage at +25°C, and <2.5nA at +85°C. These values are 100% tested at maximum rated hot temperature and correlated at room temperature - critical for maintaining accuracy in high-impedance sensor interfaces and battery-monitoring circuits.
Can the MAX322CUA be used with single-supply systems?
No, the MAX322CUA requires true dual supplies (V+ and V−) and is not specified for single-supply operation. For single-rail applications, Maxim recommends the MAX323/MAX324/MAX325 family. Attempting single-supply use violates the Absolute Maximum Ratings and may cause latch-up or parametric failure.
What package type and dimensions does the MAX322CUA use?
The MAX322CUA uses the 8-pin µMAX package (3.0mm × 3.0mm, 0.5mm pitch), with exposed paddle for thermal dissipation. Its footprint matches industry-standard DFN-8 but is distinct from SO-8 or PDIP. Pin 1 is marked by a dot; the package is rated for 0°C to +70°C operation and supports lead-free soldering when ordered with '+' suffix (e.g., MAX322CUA+).
MAX322CUA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO/NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 300mOhm
- Voltage - Supply, Single (V+):
- 2.7V ~ 8V
- Voltage - Supply, Dual (V±):
- ±2.7V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 150ns, 100ns
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- 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-µMAX
MAX322CUA FAQ
1.How can I place an order for MAX322CUA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX322CUA 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 MAX322CUA reliable?
The price and inventory of MAX322CUA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX322CUA is usually 5 days.
3.What payment methods are accepted for MAX322CUA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX322CUA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX322CUA?
MAX322CUA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX322CUA 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 MAX322CUA?
For technical support, including MAX322CUA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX322CUA requirements.
6.How does Aetrix verify that MAX322CUA is sourced from the original manufacturer or authorized distributors?
All MAX322CUA 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 MAX322CUA meets industry standards.
7.What is the process for return or replacement of MAX322CUA?
All MAX322CUA units undergo pre-shipment inspection (PSI). If there is an issue with MAX322CUA, 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 MAX322CUA part is unused and in its original packaging.
Return procedure for MAX322CUA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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