MAX395EAG+ - 8-Channel Serial SPST Switch | Analog Devices
N.º de pieza: MAX395EAG+ ✓ ActivoMAX395EAG+ Descripción general
An analog switch is a semiconductor device that routes analog or digital signals between circuit nodes under electronic control. The MAX395 combines eight SPST switches with a serial control register, placing it in the hierarchy of analog switch, multiplexer or demultiplexer, interface IC, and semiconductor. It is useful where a microcontroller or test system must address multiple signal paths while minimizing the number of dedicated control pins.
The device supports single-supply operation from 2.7 V to 16 V as well as dual-supply operation from ±2.7 V to ±8 V. Its maximum on-resistance is 100 ohm, and switching times are specified at up to 400 ns. Off leakage is 0.1 nA at +25°C and 5 nA at +85°C, helping preserve the integrity of high-impedance analog nodes during disconnected intervals.
The internal serial interface shifts command data into the device on the rising edge of SCLK. Data presented at DIN is clocked into the internal shift register, where it controls the states of the eight SPST channels. According to the Analog Devices product page, the MAX395 is electrically equivalent to two MAX391 quad switches and is pin compatible with the MAX335.
Typical uses include battery-powered measurement systems, automated test equipment, audio routing, industrial control interfaces, and general-purpose signal multiplexing. The serial interface reduces control-logic wiring, while the eight independently controlled channels provide flexible routing across a compact PCB footprint.
Designers should account for the 100 ohm channel resistance when driving the switched nodes, especially with long PCB traces or high-frequency signals. Supply bypassing, grounded return paths, and careful routing of the serial clock and data lines are necessary to limit coupling into the analog channels. The power-up state leaves all switches off and resets the internal shift registers to zero.
This page summarizes the device function, operating limits, pin-compatible family relationships, selection trade-offs, and practical integration guidance. It also organizes manufacturer information and technical alternatives to support faster component evaluation and board-level sourcing decisions.
Alternativas directas para MAX395EAG+ — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
MAX395CAG+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX395EAG-T
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX395EAG+T
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX395EAG+ Valores máximos y características eléctricas
| Number of Switches | 8 |
| Switch Configuration | 8-channel SPST |
| Maximum On-Resistance | 100 ohm |
| Minimum Single-Supply Voltage | 2.7 V |
| Maximum Single-Supply Voltage | 16 V |
| Minimum Dual-Supply Voltage | +/-2.7 V |
| Maximum Dual-Supply Voltage | +/-8 V |
| Maximum On Time | 400 ns |
| Maximum Off Time | 400 ns |
| Off Leakage Current at +25C | 0.1 nA |
| Off Leakage Current at +85C | 5 nA |
| Serial Interface | SPI/QSPI/MICROWIRE compatible |
| Data Clocking | Rising-edge SCLK |
| Power-Up State | All switches off; shift registers reset to zero |
| Encapsulado | SSOP-24 |
| Recuento de pines | 24 pins |
| Tipo de montaje | Surface Mount |
| Lead-Free Status | Lead Free |
| Estado RoHS | RoHS Compliant |
| Datasheet Publication Date | 1995-11-24 |
Guía de configuración de pines de MAX395EAG+ ssop-24
Configuración de pines para MAX395EAG+ (encapsulado ssop-24). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para MAX395EAG+.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MAX395EAG+ es adecuado para 6 aplicacións: Battery-Powered Sensor Acquisition, Automated Test Equipment, Audio Signal Routing, Industrial Control Interfaces, Multiplexed Communication Interfaces, Programmable Measurement Front Ends.
Battery-Powered Sensor Acquisition
The MAX395EAG+ suits multiplexed sensor acquisition systems operating from a 2.7 V minimum supply. Its eight SPST channels can route multiple high-impedance inputs through a common measurement amplifier, while the serial control reduces the number of direct microcontroller connections needed. With a maximum on-resistance of 100 ohm, the device is best suited to moderate-bandwidth signals where source impedance permits that resistance. The 0.1 nA off leakage at +25°C is helpful when disconnected sensors would otherwise float. For precision measurements, account for leakage from external circuitry and keep the switched-node traces short.
Recomendado
Automated Test Equipment
The MAX395EAG+ can route test signals across eight channels in automated test equipment because each SPST path is addressed through the common serial shift register. SPI, QSPI, and MICROWIRE compatibility lets a sequencer update switch states without eight separate control lines. The 400 ns maximum on- and off-time supports reasonably fast routing decisions, while the 100 ohm maximum on-resistance must be included in the test-path budget. Use grounded return routing and careful clock placement to prevent serial-control activity from coupling into sensitive measurement nodes.
Recomendado
Audio Signal Routing
The MAX395EAG+ provides eight independently controlled analog paths for audio-source selection, mute functions, or channel routing in compact equipment. Its maximum on-resistance of 100 ohm is acceptable for many line-level and higher-impedance audio nodes, although impedance and insertion loss should be checked against the source and destination. The serial command interface simplifies control when the routing matrix is managed by a digital audio processor. Keep analog traces away from SCLK and DIN, maintain a continuous ground reference, and verify that the selected supply arrangement supports the intended bipolar audio range.
Recomendado
Industrial Control Interfaces
The MAX395EAG+ can route control, sensor, or diagnostic signals in industrial interface modules where multiple channels must be selected by a common controller. It accepts a single supply from 2.7 V to 16 V or dual supplies from ±2.7 V to ±8 V, providing flexibility across different signal-chain requirements. The 5 nA off leakage at +85°C remains useful in higher-temperature equipment, but system leakage must be evaluated as well. For noisy industrial environments, use a low-impedance supply return, place decoupling near the device, and keep switching-node copper away from high-current switching paths.
Recomendado
Multiplexed Communication Interfaces
The MAX395EAG+ can select among eight communication lines when a system requires dynamic routing under serial control. Compatibility with SPI, QSPI, and MICROWIRE makes the control section suitable for common embedded serial buses, while the 400 ns switching time supports moderate-speed routing. The 100 ohm on-resistance can affect high-impedance and long-trace paths, so signal-integrity calculations should include the switch resistance and the capacitance of the connected routing. Use short, properly referenced traces, avoid routing SCLK beneath sensitive analog nets, and confirm that power-up leaves every channel disconnected as required by the system.
Recomendado
Programmable Measurement Front Ends
The MAX395EAG+ is useful in programmable front ends where several sensors, reference inputs, or excitation signals must be connected selectively. Eight independent SPST channels can create a compact routing network, and serial control allows the configuration to change without a large bank of discrete control lines. The maximum on-resistance of 100 ohm must be included in the front-end transfer function, especially when driving capacitive inputs. For leakage-sensitive measurements, evaluate the 0.1 nA off leakage at +25°C together with board contamination and adjacent-channel leakage. Provide local supply bypassing and a low-impedance ground plane to preserve measurement stability.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MAX395EAG+ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MAX395CAG+ | MAX395EAG-T | MAX395EAG+T |
|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | SSOP-24 | SSOP-24 - same | SSOP-24 - same | SSOP-24 - same |
| Number of Channels | 8 | 8 | 8 | 8 |
| Switch Configuration | SPST | SPST | SPST | SPST |
| Maximum On-Resistance | 100 ohm | 100 ohm | 100 ohm | 100 ohm |
| Minimum Supply Voltage | 2.7 V | 2.7 V | 2.7 V | 2.7 V |
| Maximum Supply Voltage | 16 V | 16 V | 16 V | 16 V |
| Serial Interface | SPI/QSPI/MICROWIRE compatible | MAX395 serial interface | MAX395 serial interface | MAX395 serial interface |
Diferenciadores clave
- Eight independent channels with serial control (frente a MAX391)
- Established pin-compatible relationship within the MAX family (frente a MAX335)
- Wide single-supply operating range (frente a MAX395EAG-T)
Notas de diseño
Treat each switched node as a 100 ohm series element in the signal path. For high-impedance sources, calculate the resulting attenuation and settling time with the connected capacitance before assigning the MAX395EAG+ to a precision measurement channel. Keep traces short, use a continuous ground reference, and place any required input or termination components close to the switch pins.
Route SCLK and DIN away from sensitive analog switch nodes to reduce capacitive coupling from clock edges. Use a compact ground plane, avoid splitting the ground return beneath the SSOP-24 footprint, and connect local supply bypassing to the device with very short traces. Confirm the pin assignments and exposed electrical requirements against the manufacturer pin-description table before finalizing artwork.
The MAX395EAG+ supports a 2.7 V to 16 V single supply or ±2.7 V to ±8 V dual supplies. Verify that every externally applied analog signal remains within the selected supply arrangement. The device is normally low-current, but transient current and charge injection can affect adjacent channels; maintain adequate supply decoupling and ground the return path consistently.
Do not assume that every MAX395 ordering suffix has the same temperature grade. The MAX395EAG-T is identified as a 0C to +70C device, while other suffixes can represent different operating grades. Verify the complete MPN against the ambient-temperature requirement and package form before using a variant as a drop-in production alternative.
Información de cumplimiento
The component information identifies the MAX395EAG+ as RoHS Compliant and Lead Free. No additional qualification declarations were established.
