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Analog Devices Inc./Maxim Integrated MAX320CUA+
- Part No.:
- MAX320CUA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX320CUA+.pdf
- Description:
- IC SWITCH SPST-NOX2 35OHM 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:174
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Product details
Overview
MAX320CUA+ from Maxim Integrated is a precision dual SPST analog switch with two normally open (NO) channels, designed for ±3V to ±8V bipolar supply operation. It delivers 35Ω max on-resistance, <2Ω channel-to-channel RON matching, and 150ns max turn-on time, enabling high-fidelity signal routing in ±5V DAC/ADC interfaces and battery-powered test equipment.
For engineers reviewing the MAX320CUA+ datasheet, MAX320CUA+ pinout, MAX320CUA+ application, or MAX320CUA+ equivalent, key selection criteria include guaranteed charge injection (<5pC), 100pA max off-leakage at +85°C, ESD robustness (>2000V per Method 3015.7), and µMAX-8 package compatibility with space-constrained portable designs.
Technical Context
The MAX320CUA+ implements CMOS-based transmission-gate architecture with back-to-back NMOS/PMOS pairs per switch, enabling bidirectional analog signal handling across the full ±5V range without distortion. Its logic interface accepts TTL/CMOS-compatible inputs referenced to V+, with VIH = V+ − 1.5V and VIL = V+ − 2.5V.
Internal ESD protection diodes clamp input/output pins to V+ and V− rails, supporting fault-tolerant operation up to ±8.5V analog signals when used with external blocking diodes. The device guarantees break-before-make timing only in the MAX322 variant-not applicable to MAX320CUA+.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 35Ω max at ±5V supplies - ensures minimal signal attenuation in precision instrumentation paths |
| RON Matching | <2Ω between channels - critical for matched gain/phase in differential or dual-path circuits |
| Charge Injection | 5pC max - limits voltage glitch on sample-and-hold capacitors during switching |
| Leakage Current | 100pA max at +25°C, <2.5nA at +85°C - preserves accuracy in high-impedance sensor front-ends |
| Switching Speed | tON < 150ns, tOFF < 100ns - supports multiplexing of audio-band and fast control signals |
| ESD Protection | >2000V per Method 3015.7 - enables robust handling in manufacturing and field environments |
| Supply Range | ±3V to ±8V dual supply - supports legacy industrial ±5V and military ±8V systems |
Pinout & Package
MAX320CUA+ is housed in an 8-pin µMAX package (3.05mm × 3.05mm × 0.95mm), compatible with fine-pitch PCB layouts and reflow assembly. The package features exposed pad thermal enhancement and meets JEDEC MO-187AC standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NO1) | Normally Open Switch Terminal 1 | Analog path closed only when IN1 = logic high; bidirectional signal node |
| 2 (COM1) | Common Terminal 1 | Primary analog I/O port for Channel 1; connects to NO1 when enabled |
| 3 (IN2) | Logic Input 2 | CMOS/TTL-compatible control for Channel 2; referenced to V+ |
| 4 (V−) | Negative Supply Rail | Bipolar supply reference; must be applied before analog/logic signals |
| 5 (V+) | Positive Supply Rail | Bipolar supply reference; must be applied before V− and other signals |
| 6 (COM2) | Common Terminal 2 | Primary analog I/O port for Channel 2; connects to NO2 when enabled |
| 7 (IN1) | Logic Input 1 | CMOS/TTL-compatible control for Channel 1; referenced to V+ |
| 8 (NO2) | Normally Open Switch Terminal 2 | Analog path closed only when IN2 = logic high; bidirectional signal node |
Key Features
| Feature | Design Value |
|---|---|
| Low On-Resistance Flatness | <4Ω variation over full ±5V analog range - maintains consistent gain across signal swing |
| Bipolar Supply Flexibility | Operates from ±3V to ±8V - eliminates need for level-shifting in mixed-voltage systems |
| Ultra-Low Power Consumption | <1.25mW at ±5V - extends battery life in portable medical and handheld test gear |
| Guaranteed Charge Injection | <5pC - enables sub-12-bit accuracy in sampling circuits without external correction |
| High Off-Isolation | 72dB at 1MHz - suppresses crosstalk between adjacent switched signal paths |
Applications
| Battery-Powered Test Equipment | ±5V Precision ADC/DAC Interfaces |
|---|---|
|
Use Scenario: Portable multimeters and handheld signal analyzers requiring low-power, high-accuracy analog multiplexing. IC Role / Device Role / Timing Role: Dual-channel SPST switch routing sensor inputs to a shared ADC front-end while maintaining signal integrity. Use Value: 100pA leakage and 35Ω RON prevent measurement drift and gain error in microamp-level current measurements. |
Use Scenario: Industrial data acquisition systems interfacing ±5V sensors to successive-approximation ADCs. IC Role / Device Role / Timing Role: Signal path selector enabling dynamic range optimization by switching between calibrated reference and sensor inputs. Use Value: 5pC charge injection minimizes hold capacitor voltage step errors, preserving 12-bit effective resolution. |
| Audio Signal Routing | Military Radio Front-Ends |
|
Use Scenario: Programmable audio mixers and headset switch matrices in ruggedized communication devices. IC Role / Device Role / Timing Role: Bidirectional analog switch managing line-level audio paths with minimal THD and crosstalk. Use Value: 72dB off-isolation and 85dB crosstalk suppression ensure clean channel separation in multi-input systems. |
Use Scenario: RF receiver protection and antenna diversity switching in MIL-STD-810G-compliant radios. IC Role / Device Role / Timing Role: High-reliability analog switch isolating sensitive LNA inputs during transmit bursts or fault conditions. Use Value: >2000V ESD rating and ±8V operation withstand harsh electromagnetic environments without latch-up. |
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 |
|---|---|---|---|
| MAX320ESA+ | SO-8 package, same electrical specs, −40°C to +85°C temp range | Better suited for industrial temperature requirements and automated optical inspection | Select when extended temperature range or standard SO-8 footprint is required |
| ADG1421BRMZ | Single-supply only (±15V max), 1.8Ω typical RON, higher 3.5pC charge injection | Requires level-shifting for bipolar ±5V systems; optimized for high-speed digital test | Choose only if single-supply operation and lower RON outweigh bipolar supply compatibility needs |
Compared with MAX320ESA+ and ADG1421BRMZ, the MAX320CUA+ uniquely balances µMAX size, 0°C to +70°C commercial-grade reliability, and native ±5V support-making it optimal for compact, cost-sensitive portable instrumentation where board space and supply simplicity are primary constraints.
Availability
MAX320CUA+ is available at Aetrix Electronics and suitable for battery-operated test equipment, ±5V precision data converters, and ruggedized audio routing systems requiring stable component supply across production lifecycles.
Supply support for MAX320CUA+ 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 series belongs to Maxim's precision analog switch product line, engineered specifically for low-leakage, low-distortion signal routing in battery-powered and measurement-critical systems operating from dual supplies.
FAQ
What is the maximum allowable supply voltage for MAX320CUA+?
The MAX320CUA+ supports dual supplies from ±3V to ±8V, with absolute maximum ratings specifying V+ to V− differential up to 17V. Exceeding ±8V risks permanent damage, and operation above ±8V is not characterized or guaranteed. For reliable long-term use, maintain V+ ≤ +8V and V− ≥ −8V, ensuring the total differential remains ≤17V as specified in the Absolute Maximum Ratings table.
Does MAX320CUA+ support break-before-make switching?
No, MAX320CUA+ does not implement break-before-make functionality. That feature is exclusive to the MAX322 variant (one NO + one NC switch), as explicitly stated in the Features section and confirmed in the truth tables. The MAX320CUA+ contains two normally open switches with independent control inputs and no internal timing coordination between channels.
Can MAX320CUA+ operate with a single supply?
No, MAX320CUA+ requires dual supplies (V+ and V−) and is not rated for single-supply operation. Its internal architecture depends on symmetric or asymmetric bipolar rails (e.g., +5V/−5V or +8V/−3V). For single-supply alternatives, refer to the MAX323/MAX324/MAX325 family, which are explicitly specified for 3V to 15V single-rail use.
What is the logic voltage threshold for enabling switches in MAX320CUA+?
The logic high threshold (VIH) for MAX320CUA+ is V+ − 1.5V, and the logic low threshold (VIL) is V+ − 2.5V - both referenced to V+. For example, with ±5V supplies (V+ = +5V), VIH = +3.5V and VIL = +2.5V. Inputs driven to V− are safe but will register as logic low; driving IN1/IN2 to V+ ensures robust logic high activation of the corresponding switch.
How does charge injection affect sample-and-hold performance with MAX320CUA+?
MAX320CUA+ guarantees ≤5pC charge injection, which directly determines the voltage glitch imposed on a hold capacitor: ΔV = Q/CHOLD. For a 100pF capacitor, this yields ≤50mV step error - manageable in 8-bit systems but requiring compensation or larger CHOLD for 12-bit+ accuracy. The low 5pC spec makes MAX320CUA+ suitable for medium-resolution S/H circuits without additional clamping or correction circuitry.
MAX320CUA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SPST - NO
- 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
MAX320CUA+ FAQ
1.How can I place an order for MAX320CUA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX320CUA+ 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 MAX320CUA+ reliable?
The price and inventory of MAX320CUA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX320CUA+ is usually 5 days.
3.What payment methods are accepted for MAX320CUA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX320CUA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX320CUA+?
MAX320CUA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX320CUA+ 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 MAX320CUA+?
For technical support, including MAX320CUA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX320CUA+ requirements.
6.How does Aetrix verify that MAX320CUA+ is sourced from the original manufacturer or authorized distributors?
All MAX320CUA+ 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 MAX320CUA+ meets industry standards.
7.What is the process for return or replacement of MAX320CUA+?
All MAX320CUA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX320CUA+, 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 MAX320CUA+ part is unused and in its original packaging.
Return procedure for MAX320CUA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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