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Analog Devices Inc./Maxim Integrated MAX323CPA
- Part No.:
- MAX323CPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX323CPA.pdf
- Description:
- IC SWITCH SPST-NO X 2 60OHM 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,189
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Product details
Overview
MAX323CPA from Analog Devices is a precision dual normally-open (NO) SPST analog switch IC designed for single-supply operation from +2.7V to +16V. It delivers 60Ω max on-resistance, 2Ω max RON matching between channels, <150ns turn-on time, and 100pA max off-leakage at +25°C - enabling high-fidelity signal routing in battery-powered instrumentation and low-voltage data acquisition systems.
For engineers reviewing the MAX323CPA datasheet, MAX323CPA pinout, MAX323CPA application, or MAX323CPA equivalent, key selection criteria include guaranteed RON flatness (<6Ω), 5pC max charge injection for sample-and-hold integrity, TTL/CMOS logic compatibility at 5V, and 8-pin PDIP packaging with industrial temperature range (0°C to +70°C).
Technical Context
The MAX323CPA implements two independent, bidirectional, normally-open analog switches using CMOS process technology optimized for low leakage and matched conduction. Its internal architecture ensures break-before-make switching is not required (unlike MAX325), and all analog terminals (NO1/NO2, COM1/COM2) support rail-to-rail signal swing from GND to V+.
Logic inputs (IN1/IN2) are TTL-compatible when V+ = 5V, but require rail-to-rail drive at other supply voltages. The device draws ≤0.1µA quiescent current and features ESD protection >2000V per Method 3015.7 - critical for handling in automated test and field-deployable equipment.
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 sensor interfaces. |
| RON Matching | 2Ω max between channels - enables accurate differential signal switching without channel-to-channel gain mismatch. |
| Charge Injection | 5pC max - preserves accuracy in sample-and-hold and ADC front-end applications by minimizing voltage glitch on hold capacitor. |
| Turn-On/Off Time | tON ≤150ns, tOFF ≤100ns at +25°C - supports multiplexing of audio, video, and fast control signals without timing skew. |
| Off-Leakage Current | 100pA max at +25°C, 5nA max at +85°C - maintains signal integrity in high-impedance sensor and medical monitoring circuits. |
| Supply Range | +2.7V to +16V single supply - eliminates need for dual rails in portable +3.3V, +5V, or industrial +12V systems. |
| ESD Rating | >2000V per Method 3015.7 - provides robust handling during PCB assembly and field service without external protection. |
Pinout & Package
MAX323CPA is housed in an 8-pin plastic DIP (dual in-line package) with 0.300-inch width, lead pitch of 0.100 inch, and RoHS-compliant finish. Pin 1 is NO1 (normally open terminal of Switch 1), Pin 2 is COM1 (common terminal of Switch 1), Pin 3 is IN2 (logic input for Switch 2), Pin 4 is GND, Pin 5 is NO2 (normally open terminal of Switch 2), Pin 6 is COM2 (common terminal of Switch 2), Pin 7 is IN1 (logic input for Switch 1), and Pin 8 is V+ (positive supply).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (NO1) | Normally Open Analog Terminal - Switch 1 | Open-circuit path when IN1 = LOW; connects to COM1 only when IN1 = HIGH - used for enable-controlled signal insertion. |
| Pin 2 (COM1) | Common Analog Terminal - Switch 1 | Bidirectional node linking NO1 and internal switch element; accepts analog signals up to V+ or down to GND. |
| Pin 3 (IN2) | Logic Input - Switch 2 | TTL/CMOS-compatible digital control (0.8V/2.4V thresholds at 5V supply); drives internal gate to close NO2–COM2 path. |
| Pin 4 (GND) | Ground Reference | Return path for supply current and logic reference; must be low-impedance to minimize noise coupling into analog paths. |
| Pin 5 (NO2) | Normally Open Analog Terminal - Switch 2 | Functionally identical to NO1 but controlled by IN2 - enables independent routing of two analog signals. |
| Pin 6 (COM2) | Common Analog Terminal - Switch 2 | Independent of COM1; allows isolation of two separate signal chains without crosstalk or shared impedance. |
| Pin 7 (IN1) | Logic Input - Switch 1 | Active-HIGH control for NO1–COM1 path; inverted logic sense not supported - simplifies interface with microcontroller GPIOs. |
| Pin 8 (V+) | Positive Supply | Single power rail powering both analog and logic sections; substrate tied internally to V+ for latch-up immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Low RON flatness | <6Ω variation across 0V–V+ analog range - maintains consistent gain and linearity in variable-gain amplifier and programmable filter paths. |
| Guaranteed RON matching | <2Ω difference between channels at +25°C - essential for matched-pair applications like balanced audio switching and differential ADC multiplexing. |
| Ultra-low charge injection | <5pC - prevents hold-step errors in precision sample-and-hold circuits and reduces settling time in high-resolution data acquisition. |
| TTL/CMOS logic compatibility | Validated at +5V supply with 0.8V/2.4V thresholds - enables direct connection to legacy microcontrollers and FPGAs without level-shifting circuitry. |
| Single-supply flexibility | Operates from +2.7V to +16V - supports wide-range battery chemistries (Li-ion, alkaline) and industrial +12V bus architectures without auxiliary regulators. |
Applications
| Battery-Powered Instrumentation | Audio Signal Routing |
|---|---|
Use Scenario: Portable multimeter front-end selecting between voltage, current, and resistance measurement paths while operating from a single 9V battery. IC Role / Device Role / Timing Role: Dual SPST analog switch isolating sensor inputs and scaling networks; enables channel selection with <150ns latency and no power-supply sequencing constraints. Use Value: 60Ω max RON and 2Ω matching preserve measurement accuracy across ranges; 5μW quiescent power extends battery life beyond 100 hours. | Use Scenario: Headphone amplifier output stage switching between stereo line-in, mic-in, and Bluetooth codec signals in a compact audio hub. IC Role / Device Role / Timing Role: Bidirectional analog switch routing AC-coupled audio signals (±1Vpp) with rail-to-rail capability and minimal THD degradation. Use Value: 9pF off-capacitance and 22pF on-capacitance minimize high-frequency roll-off; 5pC charge injection prevents audible pop/click during switching. |
| Test Equipment Multiplexer | Medical Sensor Interface |
Use Scenario: Automated test system scanning 16 thermocouple inputs into a single high-precision ADC using cascaded analog switches. IC Role / Device Role / Timing Role: Precision SPST switch providing low-leakage (<100pA), low-RON signal path with guaranteed channel matching for calibrated measurements. Use Value: 100pA max off-leakage prevents thermocouple cold-junction voltage drift; 75Ω RON max over temperature ensures stable gain calibration. | Use Scenario: ECG front-end selecting between multiple electrode pairs while maintaining ultra-high input impedance (>100MΩ) and low noise. IC Role / Device Role / Timing Role: Normally-open switch isolating unused electrodes to prevent leakage-induced baseline wander and common-mode interference. Use Value: 5nA max off-leakage at +85°C avoids DC offset accumulation; 2000V ESD rating withstands clinical handling without failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX323CSA | Same electrical specs, but in 8-pin SO package (3.9mm × 4.9mm) instead of PDIP - smaller footprint, surface-mount compatible. | Suitable for space-constrained PCBs where through-hole mounting is impractical; thermal resistance differs (SO: 5.88mW/°C derating above +70°C vs. PDIP: 9.09mW/°C). | Select MAX323CSA for automated SMT assembly and higher board density; retain MAX323CPA for prototyping, manual soldering, or legacy through-hole designs. |
| ADG1419BRUZ | Single-supply +3V to +40V operation, 0.6Ω typical RON, but higher 25pC charge injection and no 100pA leakage guarantee at +25°C. | Better for high-voltage industrial sensors; less suitable for precision low-leakage sample-and-hold due to higher charge injection and leakage. | Choose ADG1419BRUZ only when extended supply range or lower RON outweighs need for sub-5pC charge injection and pA-level leakage control. |
Compared with MAX323CSA, MAX323CPA offers identical analog performance but greater mechanical robustness and ease of hand-soldering; versus ADG1419BRUZ, it trades higher RON for guaranteed low-leakage and ultra-low charge injection - making it superior for battery-powered precision measurement where signal integrity dominates.
Availability
MAX323CPA is available at Aetrix Electronics and suitable for battery-operated instrumentation, audio signal routing, test equipment multiplexing, and medical sensor interface applications requiring stable component supply across long production lifecycles.
Supply support for MAX323CPA 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA.
The MAX323CPA belongs to the MAX32x family of precision single-supply analog switches, engineered specifically for low-leakage, low-charge-injection, and rail-to-rail signal routing in portable and industrial measurement systems.
FAQ
What is the maximum supply voltage rating for MAX323CPA?
The absolute maximum supply voltage for MAX323CPA is +17V, though recommended operating range is +2.7V to +16V. Exceeding +17V risks permanent damage per Absolute Maximum Ratings. At V+ = 16V, RON remains within spec (≤75Ω), and leakage stays below 5nA at +85°C - confirmed in Electrical Characteristics tables for TMIN to TMAX conditions.
Does MAX323CPA support bidirectional analog signal flow?
Yes, MAX323CPA supports fully bidirectional analog signal routing on all NO and COM pins. The internal MOSFET structure has no intrinsic directionality; signals can pass from NO1 to COM1 or COM1 to NO1 with identical RON and leakage characteristics - verified in Applications Information section under "Analog Signal Levels" and Figure 2 switching diagrams.
Is MAX323CPA pin-compatible with MAX324CPA or MAX325CPA?
No, MAX323CPA is not pin-compatible with MAX324CPA or MAX325CPA. While all three share the same 8-pin PDIP package and pinout numbering, their terminal functions differ: MAX323CPA uses Pins 1 and 5 as NO1 and NO2; MAX324CPA uses them as NC1 and NC2; MAX325CPA assigns Pin 1 as NO1 and Pin 5 as NC2. Swapping devices without PCB revision causes incorrect switching behavior.
What is the guaranteed RON flatness specification for MAX323CPA?
MAX323CPA guarantees RON flatness of ≤6Ω maximum at +25°C and ≤8Ω maximum over full temperature range (0°C to +70°C). Flatness is defined as the difference between max and min RON measured across the full analog signal range (0V to V+), ensuring consistent gain in variable-gain amplifier applications - explicitly stated in Electrical Characteristics table under "RFLAT(ON)" parameter.
Can MAX323CPA operate reliably from a +3.3V supply?
Yes, MAX323CPA operates reliably from +3.3V, with characterized performance at +3.0V to +3.6V. At +3.3V, RON rises to 175Ω max (vs. 60Ω at +5V), tON increases to 400ns max, and logic inputs require rail-to-rail drive (0V/3.3V) rather than TTL thresholds - all specified in the +3.3V Electrical Characteristics table on page 4 of the datasheet.
MAX323CPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX323CPA FAQ
1.How can I place an order for MAX323CPA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX323CPA 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 MAX323CPA reliable?
The price and inventory of MAX323CPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX323CPA is usually 5 days.
3.What payment methods are accepted for MAX323CPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX323CPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX323CPA?
MAX323CPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX323CPA 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 MAX323CPA?
For technical support, including MAX323CPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX323CPA requirements.
6.How does Aetrix verify that MAX323CPA is sourced from the original manufacturer or authorized distributors?
All MAX323CPA 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 MAX323CPA meets industry standards.
7.What is the process for return or replacement of MAX323CPA?
All MAX323CPA units undergo pre-shipment inspection (PSI). If there is an issue with MAX323CPA, 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 MAX323CPA part is unused and in its original packaging.
Return procedure for MAX323CPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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