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Analog Devices Inc./Maxim Integrated MAX4521ESE+
- Part No.:
- MAX4521ESE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4521ESE+.pdf
- Description:
- IC SW SPST-NCX4 100OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:114
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Product details
Overview
MAX4521ESE+ from Maxim Integrated is a quad, low-voltage, normally closed (NC) SPST analog switch IC designed for rail-to-rail signal routing in precision analog and mixed-signal systems. It features 100Ω max on-resistance, 4Ω max channel matching, 12Ω max on-resistance flatness, <1µW power consumption, and operates from ±2V to ±6V dual supplies or +2V to +12V single supply. It is used in battery-operated test equipment requiring low-leakage, high-isolation signal switching.
For engineers reviewing the MAX4521ESE+ datasheet, MAX4521ESE+ pinout, MAX4521ESE+ application, or MAX4521ESE+ equivalent, key selection criteria include NC configuration, -40°C to +85°C extended temperature rating, SO-16 narrow-body package, 1nA COM off-leakage at +25°C, and compatibility with DG211/DG212/DG213 footprints.
Technical Context
The MAX4521ESE+ implements four independent CMOS SPST switches with normally closed topology, each driven by TTL/CMOS-compatible digital inputs referenced to V+ and GND. Its internal architecture uses paralleled N- and P-channel MOSFETs with out-of-phase gate drive from V+ and V−, enabling true rail-to-rail analog conduction without ground reference.
It supports bipolar operation (±2V to ±6V) with ESD protection >2kV per Method 3015.7, and maintains specified performance down to +2.7V single supply. Logic thresholds (0.8V/2.4V) ensure interoperability with standard 5V logic while preserving analog signal integrity across the full ±4.5V input range under dual-supply conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RON) | 100Ω max at ±5V supplies - ensures minimal signal attenuation and voltage drop in low-level analog paths |
| On-resistance match | 4Ω max between channels - enables precise gain-matching in multi-channel instrumentation front-ends |
| On-resistance flatness | 12Ω max over signal range - maintains consistent channel gain across rail-to-rail input voltages |
| COM off-leakage current | 1nA at +25°C, 10nA at +85°C - preserves signal integrity in high-impedance sensor interfaces |
| Supply range | +2V to +12V single or ±2V to ±6V dual - supports portable, industrial, and avionics power architectures |
| Logic compatibility | 0.8V/2.4V thresholds with ±5V or +5V supply - eliminates level-shifting in legacy 5V control systems |
| ESD protection | >2kV per Method 3015.7 - enhances reliability in handling-sensitive test and field-deployed equipment |
Pinout & Package
MAX4521ESE+ is housed in a 16-pin narrow SOIC (SO-16) package (package code S16-2), 7.5mm × 4.4mm body, 1.75mm height, with standard 1.27mm pitch. Pin 1 is NC (not connected); pins 2 and 5 are V− and GND respectively; pins 11 and 13 are V+ and NC; pins 1–4 and 9–12 serve as IN/COM/NC terminals for four independent NC switches.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1–IN4 (pins 15,14,7,6) | Digital control input | Active-low logic controls NC state; 0 = closed, 1 = open; TTL/CMOS compatible |
| COM1–COM4 (pins 2,15,10,7 → corrected per SO pinout: pins 1,16,9,8) | Analog common terminal | Rail-to-rail signal path node; bidirectional; no ground reference required |
| NC1–NC4 (pins 3,14,11,6 → corrected: pins 3,6,14,11) | Analog normally closed terminal | Connected to COM when IN = 0; open when IN = 1; interchangeable with COM |
| V+ (pin 13) | Positive supply | Powers analog switches and internal logic; connects to substrate; accepts +2V to +12V |
| V− (pin 2) | Negative supply | Required for bipolar operation (±2V to ±6V); connect to GND for single supply |
| GND (pin 5) | Digital ground reference | Reference for logic inputs only; no analog signal reference; decoupling critical for noise immunity |
| N.C. (pins 4,12) | No connection | Internally unconnected; must be left floating or tied to GND per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports signals from V− to V+ without clipping or distortion, enabling direct interface with op-amp outputs and sensor bridges |
| Four independently controlled NC switches | Provides fail-safe default-closed signal paths ideal for safety-critical monitoring and backup routing applications |
| Low 1nA off-leakage at +25°C | Minimizes error in high-impedance data acquisition channels (e.g., thermocouple, pH probe, piezoelectric sensors) |
| Pin compatibility with DG211/DG212/DG213 | Enables drop-in replacement in legacy designs without PCB rework or layout changes |
| 12Ω on-resistance flatness | Ensures stable gain and linearity across full analog input range, critical for precision measurement and audio routing |
Applications
| Battery-Powered Data Acquisition | Avionics Signal Conditioning |
|---|---|
Use Scenario: Portable multichannel sensor logger acquiring thermocouple and RTD signals in remote field deployments. IC Role / Device Role / Timing Role: Quad NC switch routes analog inputs to shared ADC front-end while maintaining default continuity during power-up or controller reset. Use Value: 1nA off-leakage prevents DC offset errors in µV-level sensor outputs; rail-to-rail support accommodates wide-span transducer signals without external biasing. | Use Scenario: Redundant flight control signal routing where continuity must be guaranteed unless explicitly commanded open. IC Role / Device Role / Timing Role: Normally closed configuration provides fail-safe signal path integrity; ESD-hardened design withstands aircraft electrostatic environments. Use Value: >2kV ESD rating meets DO-160 Section 22 requirements; -40°C to +85°C rating supports operation across cabin and external sensor zones. |
| Automated Test Equipment (ATE) | Professional Audio Routing |
Use Scenario: Modular ATE system switching calibration references and DUT signals into precision metrology circuits. IC Role / Device Role / Timing Role: Four matched NC switches enable simultaneous calibration path selection with <4Ω RON mismatch minimizing channel-to-channel gain variance. Use Value: 12Ω RON flatness ensures consistent frequency response from DC to 50MHz; low charge injection (<5pC) prevents settling errors in fast-switching test sequences. | Use Scenario: Digital mixer with analog input/output matrix requiring silent, pop-free channel muting and routing. IC Role / Device Role / Timing Role: NC topology ensures muted state on power loss or firmware crash; fast 40ns turn-off time minimizes audible artifacts during dynamic mute transitions. Use Value: <90dB off-isolation suppresses crosstalk between adjacent audio channels; low THD (<0.01% at 1kHz) preserves signal fidelity in studio-grade paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4522ESE+ | Quad NO (normally open) configuration instead of NC; identical RON, leakage, and timing specs | Suitable where default-open behavior is required (e.g., power-down isolation, safety interlocks) | Select MAX4522ESE+ when circuit requires open-circuit default state; pinout and footprint are identical |
| ADG1412BRUZ | Quad SPST, NO-only, 1.5Ω typical RON, ±15V supply capable, but higher 20nA off-leakage at +25°C | Better for high-voltage industrial I/O; less suitable for ultra-low-leakage sensor front-ends | Choose ADG1412BRUZ for ±15V operation or lower on-resistance; avoid where sub-2nA leakage is mandatory |
Compared with MAX4522ESE+, the MAX4521ESE+ provides fail-safe continuity; compared with ADG1412BRUZ, it delivers superior leakage performance at lower supply voltages but lacks extended voltage range - select based on default state requirement and leakage budget.
Availability
MAX4521ESE+ is available at Aetrix Electronics and suitable for battery-operated equipment, data acquisition systems, and avionics signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4521ESE+ 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 semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The MAX4521/MAX4522/MAX4523 family was designed specifically for low-voltage, low-leakage, rail-to-rail analog signal routing in portable and precision instrumentation systems where NC or NO default states are critical.
FAQ
What is the default switch state of MAX4521ESE+?
The MAX4521ESE+ features four normally closed (NC) SPST analog switches. When the digital input (INx) is logic low (≤0.8V), the switch is closed (conducting) between COMx and NCx; when INx is logic high (≥2.4V), the switch opens. This fail-safe behavior ensures signal continuity during power-up, reset, or control failure - a key requirement in MAX4521ESE+ deployments for safety-critical monitoring.
Does MAX4521ESE+ support single-supply operation?
Yes, MAX4521ESE+ operates from a single +2V to +12V supply by connecting V− to GND. It is fully specified for +2.7V operation, delivering 600Ω max on-resistance at +2.7V and 1.0V COM voltage. Logic thresholds remain compatible (0.8V/2.4V), and leakage stays within spec (1nA at +25°C). This makes MAX4521ESE+ suitable for battery-powered systems where dual supplies are impractical.
What is the maximum analog signal range supported by MAX4521ESE+?
The MAX4521ESE+ supports rail-to-rail analog signals from V− to V+. Under ±5V dual supplies, this is ±4.5V; under +5V single supply (V− = GND), it is 0V to +4.5V. Internal ESD diodes clamp signals exceeding V+ or V−, so the absolute maximum analog voltage is limited by the supply rails - a key constraint in MAX4521ESE+ system design to prevent diode conduction and leakage increase.
How does MAX4521ESE+ compare to industry-standard DG211 in terms of pin compatibility?
MAX4521ESE+ is pin compatible with DG211 in SO-16 narrow-body packaging: both share identical pin functions for IN1–IN4, COM1–COM4, NC1–NC4, V+, V−, GND, and N.C. terminals. No PCB layout changes are needed for drop-in replacement. However, MAX4521ESE+ offers lower on-resistance (100Ω vs. 125Ω), tighter matching (4Ω vs. 10Ω), and enhanced ESD protection (>2kV vs. unspecified), making it a functional and performance upgrade for MAX4521ESE+ retrofits.
What is the thermal performance of MAX4521ESE+ in SO-16 package?
In the narrow SO-16 package (S16-2), MAX4521ESE+ has a thermal resistance θJA of 115°C/W and a continuous power dissipation limit of 696mW at +70°C ambient (derating 8.70mW/°C above +70°C). At full rated load (100Ω RON, 10mA signal current), power dissipation is <10mW - well within safe operating limits. This ensures stable MAX4521ESE+ operation in compact, sealed enclosures without forced airflow.
MAX4521ESE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 100Ohm
- Channel-to-Channel Matching (ΔRon):
- 1Ohm
- Voltage - Supply, Single (V+):
- 2V ~ 12V
- Voltage - Supply, Dual (V±):
- ±2V ~ 6V
- Switch Time (Ton, Toff) (Max):
- 80ns, 30ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 2pF, 2pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -90dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX4521ESE+ FAQ
1.How can I place an order for MAX4521ESE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4521ESE+ 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 MAX4521ESE+ reliable?
The price and inventory of MAX4521ESE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4521ESE+ is usually 5 days.
3.What payment methods are accepted for MAX4521ESE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4521ESE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4521ESE+?
MAX4521ESE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4521ESE+ 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 MAX4521ESE+?
For technical support, including MAX4521ESE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4521ESE+ requirements.
6.How does Aetrix verify that MAX4521ESE+ is sourced from the original manufacturer or authorized distributors?
All MAX4521ESE+ 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 MAX4521ESE+ meets industry standards.
7.What is the process for return or replacement of MAX4521ESE+?
All MAX4521ESE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4521ESE+, 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 MAX4521ESE+ part is unused and in its original packaging.
Return procedure for MAX4521ESE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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