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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:271
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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 rail-to-rail signal routing in precision analog and mixed-signal systems. It features 100Ω max on-resistance, 4Ω max channel-to-channel RON matching, <1µW quiescent power, ±2V to ±6V dual or +2V to +12V single supply operation, and TTL/CMOS-compatible logic inputs - enabling use in battery-powered data acquisition and audio signal switching.
For engineers reviewing the MAX4521EEE+ datasheet, MAX4521EEE+ pinout, MAX4521EEE+ application, or MAX4521EEE+ equivalent, key selection criteria include NC switch topology, 16-pin QSOP package compatibility, -40°C to +85°C industrial temperature range, 1nA COM off-leakage at +25°C, and pin compatibility with DG211/DG212/DG213 for legacy system upgrades.
Technical Context
The MAX4521EEE+ implements four independent CMOS transmission gates with complementary N- and P-channel MOSFETs per switch, driven by logic-level translators that convert TTL/CMOS inputs into full-rail gate drive signals referenced to V+ and V−. Its analog path has no ground reference - signals swing rail-to-rail between V+ and V−, with ESD protection diodes clamping any overvoltage excursion.
Each switch exhibits flat on-resistance (≤12Ω variation over signal range) and matched RON (≤4Ω max mismatch), critical for multiplexer accuracy and gain-setting networks. The device supports break-before-make timing only in the MAX4523 variant; MAX4521 operates as pure NC switches with no inherent BBM delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | 4× SPST, normally closed (NC) - all switches conduct when IN = 0V; open when IN ≥ VIN_H (≥1.6V) |
| On-Resistance (RON) | 100Ω max at ±5V supplies - ensures minimal signal attenuation and gain error in precision sensor/mux paths |
| RON Matching | ≤4Ω max between channels - enables accurate channel-to-channel ratio matching in instrumentation front-ends |
| Off-Leakage (ICOM_OFF) | 1nA max at +25°C, 10nA at +85°C - preserves signal integrity in high-impedance sampling circuits |
| Supply Range | +2V to +12V single or ±2V to ±6V dual - supports portable (3.3V/5V) and industrial (±5V) analog signal chains |
| Logic Compatibility | TTL/CMOS thresholds (VIN_L ≤ 1.6V, VIN_H ≥ 1.6V) - interoperable with standard microcontroller GPIO without level shifters |
| ESD Protection | >2kV per Method 3015.7 - enhances robustness in test equipment and field-deployable interfaces |
Pinout & Package
MAX4521EEE+ is housed in a 16-pin QSOP (E16-4) package, 0.150" wide, 0.025" lead pitch, with exposed pad not present (QFN variants use EP; QSOP does not).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 12 | NC1–NC4 | Analog normally closed terminals - connected to COM when switch is inactive (IN = 0); must be terminated if unused |
| 2, 15, 10, 7 | COM1–COM4 | Common analog node per switch - bidirectional signal path; interchangeable with NC/NO pins per datasheet note |
| 3, 14, 11, 6 | IN1–IN4 | Digital control inputs - active-low logic: switch closes when IN ≤ 0.8V, opens when IN ≥ 2.4V |
| 5 | GND | Digital ground reference - separate from analog path; connects internal logic and level translators |
| 8 | V− | Negative analog supply - sets lower rail of analog signal range; tied to GND for single-supply operation |
| 13 | V+ | Positive analog/digital supply - powers analog switches and internal logic; internally connected to substrate |
| 16 | N.C. | No connection - not bonded; must remain unconnected on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail analog signal handling | Supports input signals from V− to V+ without clipping - essential for full-scale sensor and audio signal routing |
| Low on-resistance flatness (≤12Ω) | Minimizes THD and distortion across signal range - critical for high-fidelity audio and precision measurement |
| Ultra-low power consumption (<1µW) | Enables always-on signal conditioning in battery-operated devices with multi-year runtime |
| Pin compatibility with DG211/DG212/DG213 | Allows drop-in replacement in legacy designs without PCB layout changes or firmware updates |
| 16-pin QSOP industrial temperature grade | Rated for -40°C to +85°C operation - suitable for automotive cabin electronics and industrial control I/O modules |
Applications
| Battery-Powered Data Acquisition | Avionics Signal Routing |
|---|---|
|
Use Scenario: Multiplexing thermocouple, RTD, and strain gauge signals in handheld DMMs and portable environmental monitors. IC Role / Device Role: Quad NC analog switch selecting sensor inputs to a shared ADC front-end while maintaining low leakage and matched RON. Use Value: 1nA off-leakage prevents bias current errors in high-Z sensor bridges; 4Ω RON matching ensures consistent gain calibration across channels. |
Use Scenario: Routing analog cockpit instrument signals (airspeed, altitude, attitude) in certified flight control subsystems. IC Role / Device Role: Fault-tolerant NC switch isolating redundant sensor paths during self-test or failure detection sequences. Use Value: -40°C to +85°C rating meets DO-160 environmental requirements; >2kV ESD withstand protects against aircraft static discharge events. |
| Audio Signal Switching | Test Equipment Channel Selection |
|
Use Scenario: Selecting between microphone preamp outputs or line-level sources in professional audio mixers and interface boxes. IC Role / Device Role: Low-distortion NC switch providing silent mute-on-open behavior and minimal crosstalk between audio channels. Use Value: < -90dB off-isolation and < -90dB crosstalk preserve channel separation; 100Ω RON avoids loading 600Ω line drivers. |
Use Scenario: Configuring signal paths in automated test equipment (ATE) for semiconductor parametric testing and functional validation. IC Role / Device Role: Precision SPST switch routing reference voltages, calibration standards, and DUT signals within metrology-grade backplanes. Use Value: 12Ω RON flatness ensures stable gain across 0–5V signal range; 100% tested leakage guarantees measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4522EEE+ | Four normally open (NO) topology vs. MAX4521EEE+'s NC configuration - inverted logic control behavior | Suitable where default-open safety state is required (e.g., power-off signal isolation) | Select MAX4522EEE+ only when circuit requires de-energized-open behavior; pinout and specs otherwise identical |
| ADG1411BRUZ | Higher RON (1.8Ω typ), wider supply (±15V), but no NC/NO variant selection - fixed NO architecture | Used in higher-voltage industrial automation where ±15V rails are standard | Choose ADG1411BRUZ for ±15V systems requiring sub-2Ω RON; not a direct functional substitute due to topology and voltage limits |
Compared with MAX4522EEE+, the MAX4521EEE+ provides fail-safe NC operation ideal for sensor mux hold-on-power-loss; versus ADG1411BRUZ, it offers lower cost and guaranteed NC function at the expense of higher RON and narrower supply range.
Availability
MAX4521EEE+ is available at Aetrix Electronics and suitable for battery-operated equipment, avionics signal routing, and test equipment channel selection 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 fabless semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer markets.
The MAX4521/MAX4522/MAX4523 family was engineered for low-voltage, low-leakage analog signal routing in space-constrained, power-sensitive systems - emphasizing rail-to-rail operation, precise RON matching, and robust ESD tolerance.
FAQ
What is the maximum analog signal voltage range supported by the MAX4521EEE+?
The MAX4521EEE+ supports rail-to-rail analog signals from V− to V+. With ±5V dual supplies, this is −5V to +5V; with +5V single supply (V− = GND), it is 0V to +5V. Absolute maximum ratings allow V+ up to +13.0V and V− down to −13.0V, but operational signal range remains bounded by the applied supply rails. Exceeding V+ or V− triggers internal ESD diode conduction.
Does the MAX4521EEE+ require external pull-up or pull-down resistors on its INx control pins?
No, the MAX4521EEE+ does not require external pull-up or pull-down resistors on IN1–IN4. Its digital inputs have defined TTL/CMOS-compatible thresholds (VIN_L ≤ 1.6V, VIN_H ≥ 1.6V) and draw <1µA input current. Direct connection to microcontroller GPIO or logic gates is sufficient. Pull resistors may be added only for fail-safe state definition during power-up or reset.
How does the on-resistance of the MAX4521EEE+ vary with temperature and supply voltage?
On-resistance increases with temperature and decreases with higher supply voltage. At +25°C and ±5V, RON is ≤100Ω; at +125°C it rises to ~160Ω. With +3.3V single supply, RON is ~260Ω typical. The datasheet provides curves (TOC02, TOC04) showing monotonic increase across −55°C to +125°C and reduction from 600Ω at +2.7V to 100Ω at ±5V.
Can the MAX4521EEE+ be used in a single-supply +3.3V system?
Yes, the MAX4521EEE+ is fully specified for +2.7V to +3.6V single-supply operation. At +3.3V, typical RON is 260Ω, turn-on time is 250ns max, and logic thresholds remain compatible (VIN_H ≥ 1.6V). Analog signal range is 0V to +3.3V. All electrical characteristics in the "Single +3V Supply" table apply directly to +3.3V use cases.
Is the MAX4521EEE+ pin-compatible with the industry-standard DG211 analog switch?
Yes, the MAX4521EEE+ is explicitly pin-compatible with the DG211, DG212, and DG213. Pin functions, numbering, and spacing match exactly in the 16-pin DIP, SO, QSOP, and TSSOP packages. This allows direct replacement in existing layouts without PCB modification - provided the NC topology (vs. DG211's NO) aligns with system logic requirements.
MAX4521EEE+ 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-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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