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Analog Devices Inc./Maxim Integrated MAX329CPE
- Part No.:
- MAX329CPE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX329CPE.pdf
- Description:
- IC SWITCH SP4T X 2 3.5KOHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,952
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Product details
Overview
The MAX329CPE from Maxim Integrated is a differential 2-of-8 monolithic CMOS analog multiplexer with ultra-low off-leakage (1pA typ at +25°C), 2.5kΩ typical on-resistance, and ±5V to ±18V dual-supply operation. It functions as a bidirectional signal router in high-precision data-acquisition systems where fault tolerance and minimal signal error are critical, such as aircraft heads-up displays and control systems.
For engineers reviewing the MAX329CPE datasheet, MAX329CPE pinout, MAX329CPE application, or MAX329CPE equivalent, key selection criteria include its differential input/output architecture, guaranteed 1pA leakage at +70°C, 1.5µs switching time, and compatibility with DG509 and MAX359 in fault-tolerant analog routing designs.
Technical Context
The MAX329CPE implements a differential 2-channel select architecture using three address lines (A1, A0) and an enable input (EN) to route two independent analog signals simultaneously between eight differential input pairs (S1A/S1B through S4A/S4B) and two differential outputs (DA/DB). Its CMOS switch design ensures rail-to-rail analog signal range and latchup-proof operation.
It supports unbalanced supply configurations (e.g., +12V/–5V), operates over 0°C to +70°C, and maintains sub-10nA off-leakage across temperature when tested per specification. The device's break-before-make timing (0.2µs) and charge injection (4pC max) are optimized for low-error sampling in precision ADC front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Analog Signal Range | ±15V - Supports full-rail signal handling with ±15V supplies, enabling direct interfacing with op-amps and ADCs without level-shifting. |
| Drain-Source On-Resistance | 2.5kΩ typ - Ensures minimal voltage drop and gain error in high-impedance sensor signal paths. |
| Off-Leakage Current | 1pA typ at +25°C - Limits signal error to <40nV when used with 40kΩ series resistors in fault-tolerant configurations. |
| Switching Time | 1.5µs max - Enables sampling rates up to ~667kHz in time-critical multiplexed acquisition systems. |
| Supply Voltage Range | ±5V to ±18V - Allows flexible power system design, including unbalanced rails like +12V/–5V. |
| Enable Turn-On/Off Time | 1.5µs / 1.0µs - Provides precise timing control for synchronized channel selection in automated test equipment. |
| Off-Isolation | 84dB at 500kHz - Minimizes crosstalk between inactive channels in multi-signal monitoring applications. |
Pinout & Package
MAX329CPE is supplied in a 16-pin plastic DIP package with 0.3-inch width, RoHS-compliant and lead(Pb)-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, V− | Negative supply input | Accepts –5V to –18V; must be connected for proper switch biasing and leakage control. |
| 2, S1A | Differential input channel A | One half of first differential pair; bidirectional signal path with matched characteristics to S1B. |
| 3, S2A | Differential input channel A | Second differential input A; shares common on-resistance and leakage specs with S1A–S4A. |
| 4, S3A | Differential input channel A | Third differential input A; enables simultaneous routing of two independent analog signals. |
| 5, S4A | Differential input channel A | Fourth differential input A; completes set of four differential inputs for channel A side. |
| 6, DA | Differential output A | Output node for selected A-side channel; designed for high-impedance loads like instrumentation amplifiers. |
| 7, DB | Differential output B | Output node for selected B-side channel; electrically isolated from DA but shares same enable and address logic. |
| 8, S4B | Differential input channel B | Fourth differential input B; complements S4A to form full 2×4 differential input matrix. |
| 9, S3B | Differential input channel B | Third differential input B; matches S3A in leakage, capacitance, and on-resistance. |
| 10, S2B | Differential input channel B | Second differential input B; supports true differential signal routing without common-mode distortion. |
| 11, S1B | Differential input channel B | First differential input B; forms matched pair with S1A for noise-rejecting signal acquisition. |
| 12, V+ | Positive supply input | Accepts +5V to +18V; powers internal logic and switch drivers; exposed pad (TQFN only) connects to V+. |
| 13, GND | Ground reference | Logic and analog ground return; must be low-impedance to minimize noise coupling into sensitive analog paths. |
| 14, A1 | Address input | MSB of 2-bit address bus; selects one of four differential pairs (00→S1, 01→S2, 10→S3, 11→S4). |
| 15, A0 | Address input | LSB of 2-bit address bus; works with A1 and EN to determine active channel pair. |
| 16, EN | Enable input | Active-high logic control; disables all switches when low, eliminating leakage paths during idle states. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low off-leakage | 1pA typical at +25°C - Enables use with >10GΩ source impedances while maintaining sub-100nV offset error. |
| Bidirectional analog routing | Supports signal flow in either direction - Allows reuse as demultiplexer or shared I/O resource in compact PCB layouts. |
| TTL/CMOS logic compatibility | 0.8V/2.4V logic thresholds - Interfaces directly with microcontrollers and FPGAs without level-shifting circuitry. |
| Rail-to-rail analog range | Operates with inputs extending to V+ and V− - Eliminates need for external clamping diodes in ±15V systems. |
| Break-before-make switching | 0.2µs guaranteed interval - Prevents momentary shorting between channels during address transitions. |
Applications
| Aircraft Heads-Up Displays | Data-Acquisition Systems |
|---|---|
Use Scenario: Routing multiple sensor signals (e.g., airspeed, altitude, attitude) to a central display processor under EMI-prone cockpit conditions. IC Role / Device Role / Timing Role: Differential analog multiplexer providing noise-immune signal selection with <1pA leakage to preserve microvolt-level sensor fidelity. Use Value: Maintains 17-bit resolution over temperature due to guaranteed low leakage and matched channel characteristics. | Use Scenario: Scanning 8 thermocouple or strain gauge inputs into a single high-resolution ADC in industrial monitoring equipment. IC Role / Device Role / Timing Role: Fault-tolerant 2-channel analog switch enabling simultaneous sampling of differential sensor pairs with 1.5µs settling. Use Value: Withstands indefinite 120V AC faults via external 39kΩ resistors while introducing <0.4µV error at room temperature. |
| Control Systems | Signal Routing |
Use Scenario: Selecting among multiple feedback signals (e.g., motor current, position, temperature) in closed-loop servo controllers. IC Role / Device Role / Timing Role: Bidirectional analog mux allowing dynamic reconfiguration of signal paths without hardware changes. Use Value: ±18V supply support accommodates wide-range industrial transducers; latchup-proof construction ensures reliability in noisy environments. | Use Scenario: Interfacing legacy analog test equipment with modern digital controllers requiring flexible signal path assignment. IC Role / Device Role / Timing Role: Pin-compatible replacement for DG509 in existing designs, enabling upgrade to lower leakage and higher isolation. Use Value: 84dB off-isolation at 500kHz minimizes crosstalk between routed signals in mixed-signal bench setups. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DG509ACJ | Higher typical off-leakage (5nA vs. 1pA), 100Ω higher RDS(ON), no fault-tolerance guarantee | Legacy designs lacking precision leakage requirements; not suitable for 16+ bit data acquisition | Select MAX329CPE when sub-nA leakage and 120V AC fault survival are mandatory. |
| MAX359CPE+ | Same pinout and function; improved leakage spec (0.5pA typ), tighter RDS(ON) matching (±2% vs. ±10%) | Next-generation upgrades requiring enhanced channel-to-channel uniformity and lower error floors | Choose MAX359CPE+ for new designs targeting highest accuracy; MAX329CPE remains optimal for cost-sensitive legacy replacements. |
Compared with DG509ACJ, MAX329CPE delivers 5000× lower leakage and verified 120V AC fault resilience; versus MAX359CPE+, it trades marginal leakage and matching improvements for broader availability and lower unit cost in commercial-temperature applications.
Availability
MAX329CPE is available at Aetrix Electronics and suitable for aircraft heads-up displays, data-acquisition systems, and control systems requiring stable component supply across extended production lifecycles.
Supply support for MAX329CPE 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for precision, industrial, and aerospace applications.
The MAX328/MAX329 product line was engineered specifically for ultra-low-leakage analog signal routing in fault-prone, high-impedance measurement systems-prioritizing leakage, isolation, and rail-to-rail operation over speed or integration density.
FAQ
What is the maximum continuous analog signal voltage range supported by the MAX329CPE?
The MAX329CPE supports an analog signal range of ±15V when operated with ±15V supplies, and maintains rail-to-rail operation across its full specified supply range of ±5V to ±18V. This allows direct connection to sensors and transducers without external level-shifting, and is confirmed in the Electrical Characteristics table under "Analog Signal Range" with MIN/MAX values of –15V to +15V.
Does the MAX329CPE require external protection components to survive 120V AC faults?
Yes-the MAX329CPE achieves indefinite 120V AC fault tolerance only when used with external 39kΩ (or higher) 1/2W resistors on each input, as shown in Figure 4 of the datasheet. These resistors limit fault current and power dissipation; the MAX329CPE itself contains internal protection diodes but relies on external impedance for safe, sustained operation under line-voltage faults.
Is the MAX329CPE pin-compatible with the DG509 multiplexer?
Yes-the MAX329CPE is explicitly documented as pin-for-pin compatible with the DG509 in the General Description section and Pin Configurations diagram. Both devices share identical pin numbering, terminal functions (e.g., A0, A1, EN, S1A–S4B, DA, DB), and DIP-16 footprint, enabling direct replacement without PCB modification.
What is the guaranteed maximum off-leakage current for the MAX329CPE at its maximum operating temperature?
The MAX329CPE guarantees ≤±10nA off-leakage current at its maximum rated operating temperature of +70°C, as confirmed in the Overtemperature Electrical Characteristics table under "Source Off-Leakage Current (Note 6)" and "Drain Off-Leakage Current (Note 6)". This is 10,000× higher than the +25°C typical value (1pA) but still exceptionally low for precision analog switching.
Can the MAX329CPE operate with unbalanced supply voltages such as +12V and –5V?
Yes-the MAX329CPE is explicitly characterized for unbalanced supply operation, including combinations like +12V/–5V and +5V/–15V, as stated in the General Description. Its design ensures stable switching performance and leakage behavior across the full ±5V to ±18V supply range, regardless of symmetry between V+ and V− rails.
MAX329CPE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SP4T
- Multiplexer/Demultiplexer Circuit:
- 4:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 3.5kOhm
- Channel-to-Channel Matching (ΔRon):
- 70Ohm
- Voltage - Supply, Single (V+):
- 10V ~ 30V
- Voltage - Supply, Dual (V±):
- ±5V ~ 18V
- Switch Time (Ton, Toff) (Max):
- 1.5µs, 1µs
- -3db Bandwidth:
- -
- Charge Injection:
- 2pC
- Channel Capacitance (CS(off), CD(off)):
- 1.8pF, 8pF
- Current - Leakage (IS(off)) (Max):
- 10pA
- Crosstalk:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
MAX329CPE FAQ
1.How can I place an order for MAX329CPE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX329CPE 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 MAX329CPE reliable?
The price and inventory of MAX329CPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX329CPE is usually 5 days.
3.What payment methods are accepted for MAX329CPE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX329CPE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX329CPE?
MAX329CPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX329CPE 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 MAX329CPE?
For technical support, including MAX329CPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX329CPE requirements.
6.How does Aetrix verify that MAX329CPE is sourced from the original manufacturer or authorized distributors?
All MAX329CPE 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 MAX329CPE meets industry standards.
7.What is the process for return or replacement of MAX329CPE?
All MAX329CPE units undergo pre-shipment inspection (PSI). If there is an issue with MAX329CPE, 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 MAX329CPE part is unused and in its original packaging.
Return procedure for MAX329CPE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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