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Analog Devices Inc./Maxim Integrated MAX322CUA+T
- Part No.:
- MAX322CUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX322CUA+T.pdf
- Description:
- IC SW SPST-NO/NCX2 35OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:2,583
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Product details
Overview
The MAX322CUA+T 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 bipolar operation. It delivers 35Ω max on-resistance, <5pC charge injection, guaranteed break-before-make switching (2ns–5ns delay), and 100pA max off-leakage - enabling high-fidelity signal routing in ±5V DAC/ADC interfaces and battery-powered test equipment.
For engineers reviewing the MAX322CUA+T datasheet, MAX322CUA+T pinout, MAX322CUA+T application, or MAX322CUA+T equivalent, key selection criteria include verified break-before-make timing, leakage performance at +85°C (<2.5nA), RON matching (<2Ω), and µMAX-8 package compatibility with space-constrained mixed-signal PCB layouts.
Technical Context
The MAX322CUA+T implements complementary MOSFET switch pairs per channel with bipolar supply biasing, supporting bidirectional analog signal routing from V− to V+. Its logic interface accepts TTL/CMOS-compatible inputs referenced to V+, with VIH = V+ − 1.5V and VIL = V+ − 2.5V - enabling direct interfacing with microcontroller GPIOs without level-shifting.
Break-before-make operation is architecturally enforced in the MAX322 variant only, preventing momentary short-circuit during channel transitions. This behavior is confirmed in the truth table and measured tD (2–5ns) under RL = 300Ω, CL = 35pF conditions, distinguishing it from the MAX320 (NO/NO) and MAX321 (NC/NC) variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±3V to ±8V dual supply - supports rail-to-rail analog signals up to 16V total swing without external clamping. |
| On-Resistance (RON) | 35Ω max at ±5V - ensures minimal gain error and THD degradation in precision ±5V DAC/ADC signal paths. |
| RON Matching | <2Ω between channels - critical for matched gain/attenuation in differential or dual-path instrumentation circuits. |
| Charge Injection | <5pC - limits voltage glitch on sample-and-hold capacitors, preserving 12-bit+ accuracy in data acquisition systems. |
| Off-Leakage Current | 100pA max at +25°C; <2.5nA at +85°C - maintains signal integrity over temperature in high-impedance sensor front-ends. |
| Switching Speed | tON <150ns, tOFF <100ns - enables multiplexing of audio-band and low-MHz control signals with minimal settling delay. |
| ESD Protection | >2000V per Method 3015.7 - provides robust handling margin during board assembly and field service. |
Pinout & Package
MAX322CUA+T is housed in an 8-pin µMAX package (2.1mm × 1.6mm, 0.5mm pitch), specified for 0°C to +70°C operation. The package features exposed pad for thermal enhancement and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive Supply Rail | Bias reference for internal logic and switch driver; must be applied before V− and analog signals per sequencing requirement. |
| IN1 | Channel 1 Logic Input | Controls NO1/NC1 state; active-high logic with thresholds tied to V+ (VIH = V+ − 1.5V). |
| COM2 | Channel 2 Common Terminal | Bidirectional analog node for NC2/NO2; supports full V− to V+ signal range with flat RON. |
| NC2 | Channel 2 Normally Closed Terminal | Connected to COM2 when IN2 = logic low; breaks before NO2 makes during transition (guaranteed tD). |
| V− | Negative Supply Rail | Ground reference for negative analog swing and logic threshold generation; must follow V+ in power-up sequence. |
| IN2 | Channel 2 Logic Input | Independent control of Channel 2; enables asynchronous switching of NO2/NC2 relative to Channel 1. |
| COM1 | Channel 1 Common Terminal | Primary signal path for precision routing; matched RON and low charge injection optimize for sampling applications. |
| NO1 | Channel 1 Normally Open Terminal | Connects to COM1 only when IN1 = logic high; complements NC1 to implement SPDT-like functionality with break-before-make. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed Break-Before-Make | 2ns–5ns minimum delay between NC opening and NO closing - eliminates signal shorting in critical analog multiplexing. |
| Low On-Resistance Flatness | <4Ω variation across full analog signal range (V− to V+) - preserves linearity in ±5V audio and sensor conditioning paths. |
| Bipolar Supply Flexibility | Operates from ±3V to ±8V - supports legacy ±5V systems and newer low-voltage ±3V industrial interfaces without redesign. |
| Ultra-Low Power Consumption | <1.25mW at ±5V - extends battery life in portable test gear and handheld instrumentation. |
| High Off-Isolation | 72dB at 1MHz - suppresses crosstalk between adjacent channels in dense mixed-signal PCB layouts. |
Applications
| Battery-Powered 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 providing isolated signal routing with break-before-make to prevent meter input overload. Use Value: 100pA leakage and 35Ω RON ensure sub-LSB error in 16-bit ADC measurements; µMAX package saves board area in handheld enclosures. |
Use Scenario: Multiplexing multiple ±5V sensor outputs into a single SAR ADC input with minimal distortion. IC Role / Device Role / Timing Role: Precision SPST switch enabling channel selection while maintaining signal fidelity via low charge injection (<5pC) and flat RON. Use Value: RON matching <2Ω prevents gain mismatch between channels; break-before-make avoids transient coupling during scan sequences. |
| Audio Signal Routing | Military Radio Front-End Switching |
Use Scenario: Selecting between microphone preamp outputs and line-level inputs in ruggedized comms headsets. IC Role / Device Role / Timing Role: Bidirectional analog switch handling AC-coupled audio signals with rail-to-rail capability and low THD. Use Value: 150ns tON/100ns tOFF enables fast mute/unmute; 9pF C(OFF) minimizes high-frequency crosstalk in stereo paths. |
Use Scenario: Isolating RF receiver IF stages from calibration sources during self-test sequences in tactical radios. IC Role / Device Role / Timing Role: High-reliability analog switch providing ESD-hardened (2000V) signal gating with guaranteed break-before-make. Use Value: 2000V ESD rating meets MIL-STD-883 Class 3015.7; -40°C to +85°C qualified variants available for extended environmental operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX322ESA+ | SO-8 package, -40°C to +85°C temp range; identical electrical specs but larger footprint and higher thermal resistance. | Suitable for industrial control boards where µMAX size constraint does not apply and extended temperature is required. | Select MAX322ESA+ when board layout allows SO-8 and operating ambient exceeds +70°C. |
| ADG1422BRMZ | Single-supply only (±15V unipolar or 5V–16.5V); 1.5Ω typical RON, no break-before-make guarantee; 2.5nA leakage at +85°C. | Applicable in unipolar systems (e.g., PLC I/O modules) but requires level-shifting for bipolar ±5V use and lacks MAX322CUA+T's tD assurance. | Choose ADG1422BRMZ only for unipolar designs needing ultra-low RON; avoid where break-before-make is mandatory. |
Compared with MAX322ESA+ and ADG1422BRMZ, the MAX322CUA+T uniquely combines µMAX size, guaranteed break-before-make, and bipolar ±3V–±8V operation - making it optimal for compact, battery-powered, and mixed-polarity signal routing where channel isolation timing is critical.
Availability
MAX322CUA+T is available at Aetrix Electronics and suitable for battery-operated test equipment, ±5V precision data acquisition systems, and military radio front-end switching requiring stable component supply across commercial temperature grades.
Supply support for MAX322CUA+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
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 MAX322CUA+T belongs to the MAX320 family of precision dual-supply analog switches, engineered for low-leakage, low-distortion signal routing in battery-powered and high-accuracy instrumentation systems.
FAQ
What is the guaranteed break-before-make timing specification for MAX322CUA+T?
The MAX322CUA+T guarantees a break-before-make time delay (tD) of 2ns to 5ns under standard test conditions (RL = 300Ω, CL = 35pF). This parameter is explicitly documented in the Electrical Characteristics table and validated in Figure 3 of the datasheet. Unlike the MAX320 and MAX321, only the MAX322CUA+T provides this architectural guarantee - essential for preventing signal shorts during channel transitions in precision analog multiplexers.
Does MAX322CUA+T support rail-to-rail analog signal switching?
Yes, the MAX322CUA+T supports analog signals from V− to V+ without clipping or increased distortion. Its bidirectional architecture and flat on-resistance (<4Ω variation) across the full voltage range enable true rail-to-rail operation - confirmed in Typical Operating Characteristics plots (Figures 1–2) and specified in the Analog Signal Range parameter (V− to V+). This makes MAX322CUA+T suitable for ±5V DAC outputs and sensor interfaces where signal headroom is critical.
What is the maximum allowable supply voltage difference for MAX322CUA+T?
The absolute maximum supply voltage difference (V+ to V−) for MAX322CUA+T is 17V, as stated in the Absolute Maximum Ratings table. Exceeding this limit risks permanent damage. For reliable operation, the recommended dual-supply range remains ±3V to ±8V (i.e., 6V to 16V total), with derating applied above +70°C ambient per the Power Dissipation table (330mW at TA ≤ +70°C, derated at 4.10mW/°C above).
Can MAX322CUA+T be used with single-supply systems?
No - MAX322CUA+T is designed exclusively for dual-supply operation (±3V to ±8V) and does not support single-supply configurations. Its internal circuitry, logic thresholds (VIH/VIL referenced to V+), and analog signal handling require both V+ and V− rails. For single-supply alternatives, Maxim specifies the MAX323/MAX324/MAX325 family, which are functionally distinct and not pin-compatible with MAX322CUA+T.
What is the leakage current performance of MAX322CUA+T at elevated temperature?
The MAX322CUA+T guarantees COM on-leakage current <2.5nA and off-leakage <100pA at +85°C, as tested per Note 6 in the Electrical Characteristics table. This performance is validated across the full commercial temperature range (0°C to +70°C for the CUA grade) and correlates to the +85°C spec for extended-grade variants. Low leakage ensures minimal signal corruption in high-impedance sample-and-hold and sensor-bias applications.
MAX322CUA+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):
- 35Ohm
- Channel-to-Channel Matching (ΔRon):
- 300mOhm
- Voltage - Supply, Single (V+):
- -
- 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-uMAX/uSOP
MAX322CUA+T FAQ
1.How can I place an order for MAX322CUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX322CUA+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 MAX322CUA+T reliable?
The price and inventory of MAX322CUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX322CUA+T is usually 5 days.
3.What payment methods are accepted for MAX322CUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX322CUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX322CUA+T?
MAX322CUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX322CUA+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 MAX322CUA+T?
For technical support, including MAX322CUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX322CUA+T requirements.
6.How does Aetrix verify that MAX322CUA+T is sourced from the original manufacturer or authorized distributors?
All MAX322CUA+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 MAX322CUA+T meets industry standards.
7.What is the process for return or replacement of MAX322CUA+T?
All MAX322CUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX322CUA+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 MAX322CUA+T part is unused and in its original packaging.
Return procedure for MAX322CUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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