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Analog Devices Inc./Maxim Integrated MAX4521CEE+
- Part No.:
- MAX4521CEE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX4521CEE+.pdf
- Description:
- IC SW SPST-NCX4 100OHM 16QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,207
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Product details
Overview
MAX4521CEE+ from Maxim Integrated is a quad, low-voltage, normally closed (NC) SPST analog switch IC designed for rail-to-rail signal routing in battery-powered and precision analog systems. It features 100Ω max on-resistance (at ±5V), 4Ω max channel-to-channel on-resistance matching, <1µW quiescent power, and operates from single +2.7V to +12V or dual ±2V to ±6V supplies. It is used in audio signal routing, data acquisition front-ends, and test equipment switching matrices.
For engineers reviewing the MAX4521CEE+ datasheet, MAX4521CEE+ pinout, MAX4521CEE+ application, or MAX4521CEE+ equivalent, key selection criteria include NC configuration, QSOP-16 package compatibility, ±5V/±2.7V supply flexibility, sub-1nA off-leakage at +25°C, and pin compatibility with DG211-series switches.
Technical Context
The MAX4521CEE+ implements four independent CMOS SPST switches with normally closed topology-each switch conducts when its digital input is logic low. Its internal architecture uses complementary N- and P-channel MOSFETs driven by level-translated control signals, enabling true rail-to-rail analog operation across V− to V+.
It supports TTL/CMOS-compatible logic thresholds (0.8V/2.4V) at ±5V or +5V supply, includes >2kV HBM ESD protection per Method 3015.7, and maintains flat on-resistance (12Ω max variation) over the full signal range. Off-isolation exceeds −90dB at 100kHz, and charge injection is limited to 1–5pC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Quad SPST, normally closed (NC) - all four channels conduct at logic-low INx |
| On-Resistance (RON) | 100Ω max at ±5V supplies - ensures minimal signal attenuation in low-voltage analog paths |
| On-Resistance Matching (ΔRON) | 4Ω max between channels - critical for matched gain/attenuation in multi-channel instrumentation |
| Off-Leakage Current | 1nA max at +25°C - preserves signal integrity in high-impedance sensor interfaces |
| Supply Range | +2.7V to +12V single or ±2V to ±6V dual - supports portable, industrial, and avionics power architectures |
| Logic Compatibility | TTL/CMOS thresholds (0.8V/2.4V) - interoperable with standard microcontroller GPIO without level shifters |
| ESD Protection | >2kV per Method 3015.7 - enhances robustness in handling-sensitive test and field-deployed equipment |
Pinout & Package
MAX4521CEE+ is housed in a 16-pin QSOP (E16-4) package, 3.9mm × 4.9mm body, 0.635mm pitch, with exposed pad connected to V+ for thermal and electrical stability.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 12 | NC1–NC4 | Normally closed analog terminals - conduct to COMx when INx = logic low; interchangeable with COMx |
| 2, 15, 10, 7 | COM1–COM4 | Common analog terminals - bidirectional signal path; no ground reference required |
| 3, 14, 11, 6 | IN1–IN4 | Digital control inputs - active-low logic; drive internal level translators for gate biasing |
| 5 | V− | Negative analog supply - connect to GND for single-supply operation; sets lower analog voltage limit |
| 8 | GND | Digital ground reference - isolated from analog signal paths; required for logic-level translator bias |
| 11, 13 | V+ | Positive analog/digital supply - powers logic core and switch drivers; internally tied to substrate |
| 16 | N.C. | No connection - not internally bonded; must be left floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Analog signals swing from V− to V+ without clipping - enables full dynamic range in ±5V or +3.3V systems |
| Low on-resistance flatness | 12Ω max variation over signal range - minimizes harmonic distortion and gain error in AC-coupled paths |
| Ultra-low off-leakage | 1nA at +25°C - prevents DC drift in high-Z medical sensor or thermocouple multiplexing |
| Break-before-make isolation | Not applicable - MAX4521 is NC-only; only MAX4523 provides BBM timing (5–20ns) |
| DG211/DG212/DG213 pin compatibility | Direct replacement in existing layouts using same footprint and logic polarity - reduces redesign risk |
Applications
| Audio Signal Routing | Data Acquisition |
|---|---|
Use Scenario: Selecting between multiple microphone or line-level inputs in portable audio mixers. IC Role / Device Role / Timing Role: Quad NC switch routes analog audio paths under microcontroller GPIO control; no external bias needed. Use Value: 100Ω RON and <−90dB off-isolation preserve SNR and channel separation up to 50MHz bandwidth. |
Use Scenario: Multiplexing thermistor, RTD, or strain gauge sensors into a single ADC channel. IC Role / Device Role / Timing Role: Low-leakage NC switch isolates high-impedance sensors during idle cycles to prevent measurement drift. Use Value: 1nA off-leakage at +25°C and rail-to-rail capability maintain accuracy in sub-16-bit precision systems. |
| Test Equipment Switching | Battery-Operated Instrumentation |
Use Scenario: Configuring signal paths in handheld multimeters or automated test fixtures. IC Role / Device Role / Timing Role: Four independent NC switches enable flexible front-end signal conditioning and calibration routing. Use Value: Pin compatibility with DG211 allows drop-in upgrade of legacy designs while adding ±2.7V operation support. |
Use Scenario: Power-gating analog sections in wearable health monitors to extend battery life. IC Role / Device Role / Timing Role: Low-quiescent <1µW power enables always-on sensor monitoring with microsecond wake-up latency. Use Value: Single +2.7V operation eliminates need for charge pumps or LDOs, reducing BOM count and PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX4522CEE+ | Quad NO (normally open) configuration - conducts only at logic-high INx; identical RON, leakage, and package | Suitable where default-open safety state is required (e.g., disconnect-on-power-loss) | Select MAX4522CEE+ when fail-safe open circuit is mandatory; otherwise MAX4521CEE+ preferred for default-connected paths |
| ADG1411BRUZ | Quad SPST, NO, 1.8Ω typical RON at ±5V; higher supply current (120µA); TSSOP-16 package | Better performance in low-RON, high-speed (>100MHz) applications but higher power and cost | Choose ADG1411BRUZ only if <2Ω RON and faster tON/tOFF (<100ns) justify added cost and power overhead |
Compared with MAX4522CEE+, MAX4521CEE+ provides inherent default-closed behavior ideal for fail-safe signal continuity; versus ADG1411BRUZ, it trades lower RON and speed for ultra-low power (<1µW) and broader supply flexibility (+2.7V to +12V).
Availability
MAX4521CEE+ is available at Aetrix Electronics and suitable for battery-operated equipment, data acquisition systems, and test instrumentation requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for MAX4521CEE+ 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 designed for low-voltage, low-power analog signal routing in space-constrained and energy-sensitive applications - emphasizing rail-to-rail operation, minimal leakage, and logic-level compatibility without external support components.
FAQ
What is the logic polarity of MAX4521CEE+?
The MAX4521CEE+ implements normally closed (NC) switches: each channel conducts when its corresponding INx pin is driven logic low (≤0.8V). At logic high (≥2.4V), the switch opens. This active-low behavior is intrinsic to the MAX4521CEE+ design and differs from the NO configuration of MAX4522CEE+.
Can MAX4521CEE+ operate from a single +3.3V supply?
Yes, MAX4521CEE+ is fully specified for single +2.7V operation. At +3.3V, typical on-resistance is ~250Ω (max 500Ω), logic thresholds remain compatible (0.8V/2.4V), and off-leakage stays below 10nA at +85°C - making it suitable for modern low-voltage embedded systems.
Is the exposed pad on MAX4521CEE+ electrically connected?
Yes - the exposed pad (EP) on the MAX4521CEE+ QSOP package is internally connected to V+ and must be soldered to a V+ copper pour for optimal thermal performance and ESD robustness. Leaving it unconnected degrades power dissipation and ESD immunity.
Does MAX4521CEE+ support bipolar analog signals?
Yes - when powered with dual supplies (e.g., V+ = +5V, V− = −5V), MAX4521CEE+ passes analog signals from −4.5V to +4.5V rail-to-rail. The internal ESD diodes clamp signals exceeding V+/V−, so analog inputs must stay within (V− − 0.3V) to (V+ + 0.3V) for reliable operation.
How does MAX4521CEE+ compare to DG211 in pin compatibility?
MAX4521CEE+ is pin compatible with DG211 in QSOP-16 footprint and logic function: both are quad NC SPST switches with identical pin assignments for INx, COMx, NCx, V+, V−, GND, and N.C. No PCB changes are required when upgrading from DG211 to MAX4521CEE+.
MAX4521CEE+ 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
MAX4521CEE+ FAQ
1.How can I place an order for MAX4521CEE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4521CEE+ 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 MAX4521CEE+ reliable?
The price and inventory of MAX4521CEE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4521CEE+ is usually 5 days.
3.What payment methods are accepted for MAX4521CEE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4521CEE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4521CEE+?
MAX4521CEE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4521CEE+ 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 MAX4521CEE+?
For technical support, including MAX4521CEE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4521CEE+ requirements.
6.How does Aetrix verify that MAX4521CEE+ is sourced from the original manufacturer or authorized distributors?
All MAX4521CEE+ 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 MAX4521CEE+ meets industry standards.
7.What is the process for return or replacement of MAX4521CEE+?
All MAX4521CEE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4521CEE+, 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 MAX4521CEE+ part is unused and in its original packaging.
Return procedure for MAX4521CEE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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