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Analog Devices Inc./Maxim Integrated MAX4521EEE
- Part No.:
- MAX4521EEE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX4521EEE.pdf
- Description:
- IC SW SPST-NCX4 100OHM 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,351
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Product details
Overview
MAX4521EEE from Maxim Integrated is a quad, low-voltage, normally closed (NC) SPST analog switch IC designed for precision signal routing in battery-powered and rail-to-rail systems. It features 100Ω max on-resistance (±5V supplies), 4Ω max channel-to-channel on-resistance matching, 12Ω max on-resistance flatness over signal range, and 1nA max off-leakage at +25°C. It supports dual ±2V to ±6V or single +2V to +12V operation and handles rail-to-rail analog signals - ideal for audio signal routing and portable data acquisition.
For engineers reviewing the MAX4521EEE datasheet, MAX4521EEE pinout, MAX4521EEE application, or MAX4521EEE equivalent, key selection criteria include NC-switch topology, QSOP-16 package compatibility, TTL/CMOS logic thresholds (+0.8V/2.4V), <1µW power consumption, and >2kV ESD protection - all critical for low-power, high-reliability analog multiplexing in avionics and test equipment.
Technical Context
The MAX4521EEE implements four independent CMOS SPST switches with normally closed configuration, each driven by separate digital inputs with TTL/CMOS-compatible thresholds. 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 operates across three supply modes: bipolar (±2V to ±6V), single-ended (+2V to +12V with V− tied to GND), and fully specified +2.7V single-supply operation. Signal integrity is maintained via matched on-resistance (ΔRON ≤ 4Ω), low charge injection (1–5pC), and high off-isolation (>−90dB at 100kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RON) | 100Ω max at ±5V supplies - ensures minimal signal attenuation and voltage drop in precision analog paths. |
| On-resistance match (ΔRON) | 4Ω max between channels - enables accurate gain/phase matching in multi-channel instrumentation. |
| On-resistance flatness (RFLAT) | 12Ω max over full signal range - maintains consistent channel performance across rail-to-rail input voltages. |
| Off-leakage current | 1nA max at +25°C - preserves signal integrity in high-impedance sensor interfaces and sample-hold circuits. |
| Logic thresholds | +0.8V low / +2.4V high - guarantees reliable TTL/CMOS compatibility with +5V digital control buses. |
| ESD protection | >2kV per Method 3015.7 - enhances robustness in handling-sensitive industrial and field-deployable systems. |
| Supply range | +2V to +12V single or ±2V to ±6V dual - supports flexible power architecture in mixed-signal embedded designs. |
Pinout & Package
MAX4521EEE is housed in a 16-pin QSOP (E16-4) package, 0.150" wide, with 0.025" lead pitch. Pin 1 is NC1 (normally closed terminal of Switch 1), and the exposed pad (EP) is not present in QSOP - only in QFN variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 9, 16 | NC1–NC4 | Normally closed analog terminals - conduct to COMx when INx = logic low; used as primary signal path in default-closed configurations. |
| 2, 7, 10, 15 | COM1–COM4 | Common analog terminals - bidirectional signal interface shared between NCx and internal switch FETs. |
| 3, 4, 11, 12 | IN1–IN4 | Digital control inputs - active-low logic controls NC closure; compatible with 0.8V/2.4V TTL/CMOS thresholds. |
| 5 | V− | Negative analog supply - sets lower analog signal limit; tied to GND for single-supply operation. |
| 6 | GND | Digital ground reference - isolated from analog signal path; required for logic-level translator biasing. |
| 13 | V+ | Positive analog/digital supply - powers internal logic and switch gates; internally connected to substrate. |
| 14 | N.C. | No connection - unconnected die bond pad; must remain floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Supports analog signals from V− to V+ without clipping - essential for full-scale sensor and audio signal routing. |
| Low power consumption | <1µW quiescent power - extends battery life in portable medical monitors and handheld test gear. |
| Pin compatibility | Direct replacement for industry-standard DG211 - simplifies legacy system upgrades without PCB redesign. |
| High off-isolation | >−90dB at 100kHz - prevents crosstalk between adjacent channels in multi-signal data acquisition systems. |
| Break-before-make timing | Not applicable - MAX4521EEE is NC-only; BBM is exclusive to MAX4523 variant. |
Applications
| Audio Signal Routing | Data Acquisition |
|---|---|
Use Scenario: Selecting between multiple microphone inputs or line-level sources in portable audio mixers and voice recorders. IC Role / Device Role / Timing Role: Quad NC analog switch providing low-distortion, low-noise signal path selection with no DC bias dependency. Use Value: 100Ω RON and <5pC charge injection minimize audible artifacts and transient glitches during source switching. | Use Scenario: Multiplexing sensor outputs (thermocouples, strain gauges) into a single ADC channel in battery-powered environmental loggers. IC Role / Device Role / Timing Role: Precision analog switch enabling sequential sampling with matched channel characteristics and minimal offset drift. Use Value: 4Ω ΔRON matching and 1nA off-leakage preserve measurement accuracy across temperature ranges up to +85°C. |
| Avionics Systems | Battery-Operated Equipment |
Use Scenario: Redundant signal path selection and fault isolation in flight control interface units requiring high reliability and ESD immunity. IC Role / Device Role / Timing Role: Fail-safe NC switch ensuring default connectivity during power-up or logic failure. Use Value: >2kV ESD rating and −40°C to +85°C extended temperature grade meet DO-160 Section 22 requirements. | Use Scenario: Power domain isolation and peripheral enable/disable in handheld medical devices (e.g., glucose meters, pulse oximeters). IC Role / Device Role / Timing Role: Low-quiescent-current analog switch controlling sensor biasing and signal conditioning paths. Use Value: <1µW supply current and +2.7V minimum operation maximize runtime on coin-cell or Li-ion batteries. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DG211DN | Pin-compatible but higher on-resistance (120Ω typ), wider RON flatness (25Ω), and no guaranteed −40°C to +85°C operation. | Less suitable for precision rail-to-rail signal paths at temperature extremes or low-voltage single-supply systems. | Select MAX4521EEE when guaranteed extended temperature performance, tighter RON matching, or lower leakage is required. |
| MAX4522EEE | Same package and specs, but NO (normally open) configuration instead of NC - complementary functional variant. | Used where default-open safety behavior is needed (e.g., disconnect-on-power-loss), not direct functional replacement. | Choose MAX4521EEE for fail-safe closed-path designs; MAX4522EEE only if NO logic polarity is mandatory. |
Compared with DG211DN, MAX4521EEE delivers tighter on-resistance matching and extended temperature validation; versus MAX4522EEE, it provides inverted logic behavior essential for default-conductive signal chains in safety-critical analog routing.
Availability
MAX4521EEE is available at Aetrix Electronics and suitable for audio signal routing, battery-operated equipment, and avionics systems requiring stable component supply across industrial temperature grades.
Supply support for MAX4521EEE 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, automotive, and communications markets.
The MAX4521/MAX4522/MAX4523 family was engineered for low-voltage, low-leakage analog signal switching in portable and precision instrumentation - emphasizing rail-to-rail operation, logic compatibility, and robust ESD tolerance.
FAQ
What is the maximum analog signal range supported by the MAX4521EEE?
The MAX4521EEE supports rail-to-rail analog signals from V− to V+, enabling full-range operation with dual supplies (±2V to ±6V) or single supplies (+2V to +12V). At ±5V supplies, the analog range is ±4.5V; at +5V single supply, it spans 0V to +4.5V. This capability is intrinsic to the CMOS switch architecture and confirmed across all operating conditions in the datasheet's Electrical Characteristics tables.
Is the MAX4521EEE pin-compatible with the DG211 series?
Yes, the MAX4521EEE is explicitly stated as pin-compatible with the industry-standard DG211/DG212/DG213 analog switches. Its QSOP-16 pinout matches DG211DN, including identical NC/COM/IN assignments and supply pin locations. However, users must verify layout clearance for thermal and ESD performance, as MAX4521EEE specifies >2kV ESD protection while DG211 ratings vary by manufacturer.
Does the MAX4521EEE support single-supply operation at +3V?
Yes, the MAX4521EEE is fully specified for single +2.7V operation. At +3V supply, typical on-resistance is 260Ω (max 500Ω), with analog signal range from 0V to +3V and logic thresholds remaining at +0.8V (low) and +2.4V (high). All dynamic parameters - including tON (max 300ns) and tOFF (max 100ns) - are characterized down to +2.7V, making it viable for ultra-low-power microcontroller interfaces.
What is the function of Pin 14 (N.C.) on the MAX4521EEE?
Pin 14 on the MAX4521EEE is labeled N.C. (No Connection) and is not internally bonded - it serves no electrical function and must remain unconnected on the PCB. This is confirmed in the Pin Description table and Pin Configurations diagram. Unlike exposed-pad QFN variants, the QSOP package has no thermal pad; therefore, Pin 14 is strictly a mechanical placeholder with zero circuit role.
How does the MAX4521EEE handle leakage current at elevated temperatures?
The MAX4521EEE specifies COM_ off-leakage current as 10nA max at +85°C (vs. 1nA at +25°C), and NC_ off-leakage similarly rises to 10nA. These values are 100% tested at maximum rated temperature and guaranteed by correlation at room temperature. The increase reflects predictable silicon behavior and remains well within design margins for high-impedance sensor front-ends operating across the full −40°C to +85°C industrial range.
MAX4521EEE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-QSOP
MAX4521EEE FAQ
1.How can I place an order for MAX4521EEE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4521EEE 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 MAX4521EEE reliable?
The price and inventory of MAX4521EEE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4521EEE is usually 5 days.
3.What payment methods are accepted for MAX4521EEE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4521EEE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4521EEE?
MAX4521EEE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4521EEE 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 MAX4521EEE?
For technical support, including MAX4521EEE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4521EEE requirements.
6.How does Aetrix verify that MAX4521EEE is sourced from the original manufacturer or authorized distributors?
All MAX4521EEE 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 MAX4521EEE meets industry standards.
7.What is the process for return or replacement of MAX4521EEE?
All MAX4521EEE units undergo pre-shipment inspection (PSI). If there is an issue with MAX4521EEE, 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 MAX4521EEE part is unused and in its original packaging.
Return procedure for MAX4521EEE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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