MAX322CUA+ - Dual SPST 35 Ohm Analog Switch | Analog Devices
MPN: MAX322CUA+ ✓ AktifMAX322CUA+ Ringkasan
An analog switch is an electronic routing component that connects or isolates signal paths under digital control. A single-pole, single-throw, or SPST, switch provides one conducting path when enabled and a high-impedance path when disabled. The MAX322 family belongs to the analog-switch hierarchy within interface ICs and supports signal selection, test-point isolation, sampling circuits, and compact measurement systems.
The MAX322CUA+ provides two independent switch channels, a 1:1 signal configuration, and 35 ohm on-resistance. Its 1.25 mW power consumption is particularly useful in portable equipment where continuous circuit loading affects battery life. Maximum leakage is listed at 100 pA, helping preserve the amplitude and accuracy of signals measured through high-impedance nodes. Maximum turn-on and turn-off times are 150 ns and 100 ns, respectively, while the specified switch charge is 5 pC.
The dual-supply architecture allows signals to be routed around a zero-volt reference without adding a level-shifting function. Control inputs determine when each SPST path conducts, making the device appropriate for precision analog signal paths rather than high-voltage or high-current switching. Because the on-resistance is specified at 35 ohm, source impedance, signal amplitude, and downstream capacitance should be considered when calculating insertion error and settling behavior.
Typical uses include battery-powered multimeters, low-power sensor acquisition, laboratory test equipment, audio measurement paths, and portable diagnostic instruments. In each case, the device can route a selected input to an amplifier, measurement converter, or control circuit while isolating inactive channels. The small 8-uMAX package also supports compact instruments where PCB area is limited.
For layout, place the device close to the switched signal source and destination to minimize PCB capacitance and resistance. Keep sensitive analog traces away from digital control routing, provide a stable ground reference, and use the pin-description table in the manufacturer datasheet when assigning tracks. Do not use the switch as a power switch; its 35 ohm on-resistance is intended for signal routing rather than load-current distribution.
This page combines the manufacturer product information, distributor listings, and cross-reference results with practical guidance on switching performance, layout, signal integrity, application fit, and replacement selection. It also identifies where package, pin, electrical, lifecycle, and compliance details must be confirmed in the official MAX322 documentation before a production release.
Pilihan pengganti yang segera untuk MAX322CUA+ — sama paket, pin-pin kompatibel. Bahagian paket yang berbeza memerlukan kerja ulang PCB diasingkan.
MAX322CUA
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MAX322CUA+ Penilaian maksimum & Ciri-ciri Elektrik
| Number of Switches | 2 circuits |
| Switch Configuration | 1:1 |
| Switch Type | SPST, normally open |
| On-Resistance | 35 ohm |
| Supply Configuration | Dual supply |
| Power Consumption | 1.25 mW |
| Leakage Current | 100 pA maximum |
| Turn-On Time | 150 ns maximum |
| Turn-Off Time | 100 ns maximum |
| Switch Charge | 5 pC |
| Technology | Analog CMOS |
| Kemasan | 8-uMAX |
| Bilangan Pin | 8 pins |
| Jenis Pemasangan | Surface mount |
| Status RoHS | compliant |
| Lead-Free Status | yes |
Panduan Konfigurasi Pin MAX322CUA+ 8-umax
Konfigurasi pin untuk MAX322CUA+ (8-umax pakai). Penomeran pin, fungsi, dan garis bentuk koneksi ditakrifkan dalam dokumen pengeluar. Rujuk dokumen untuk kebentuk dan pedoman pengasman.
Tiada data garisan pin yang diperoleh untuk MAX322CUA+.
Rujuk kepada lembaran data untuk konfigurasi pin penuh.
Aplikasi Biasa
MAX322CUA+ patut untuk 6 aplikasis: Portable Multimeter Signal Routing, Battery-Powered Sensor Acquisition, Portable Diagnostic Equipment, Laboratory Test and Measurement, Low-Power Audio Signal Selection, Industrial Sensor Interface.
Portable Multimeter Signal Routing
The MAX322CUA+ suits portable multimeters because two SPST paths can route selected inputs while unused sources remain isolated. Its 35 ohm on-resistance is straightforward to include in input-path error analysis, while 100 pA maximum leakage helps preserve accuracy when probing high-impedance sources. The 1.25 mW power consumption limits the continuous load on the instrument battery, and 150 ns maximum turn-on time supports responsive range or input selection. Place each switched node near the measurement amplifier to minimize added capacitance and board leakage.
Disebarkan
Battery-Powered Sensor Acquisition
The MAX322CUA+ can select or isolate sensor signals in compact battery-powered instruments. A 100 pA maximum leakage rating is valuable when the source impedance is high enough that leakage would otherwise distort the measurement, while 1.25 mW power consumption helps preserve operating time. The two SPST channels support independent signal routing rather than a shared multiplexer path. Designers should account for the 35 ohm on-resistance when calculating divider attenuation and should keep the switched traces short to limit parasitic capacitance.
Disebarkan
Portable Diagnostic Equipment
The MAX322CUA+ fits portable diagnostic equipment that switches analog test points while maintaining low standby loading. Its dual-supply architecture supports signal routing around a system ground reference, and its fast 150 ns maximum turn-on and 100 ns maximum turn-off behavior allows control firmware to change channels promptly. The low leakage specification also reduces measurement error in high-impedance diagnostic probes. Confirm the actual signal amplitude, source impedance, and available dual-rail voltage range before finalizing the surrounding amplifier and protection circuitry.
Disebarkan
Laboratory Test and Measurement
In laboratory test systems, the MAX322CUA+ can connect precision sources to amplifiers or measurement converters while isolating unused channels. The 35 ohm on-resistance must be included in the source-to-destination transfer function, but its consistent behavior makes signal-path analysis straightforward. Low 100 pA maximum leakage is beneficial when the test fixture exposes high-impedance nodes, and the 1.25 mW consumption is negligible in most bench instruments. Use short PCB traces, a low-noise ground plane, and deliberate control-logic placement to preserve measurement quality.
Disebarkan
Low-Power Audio Signal Selection
The MAX322CUA+ can select low-level audio-related measurement paths in compact instruments where dual-supply biasing is already available. Its 35 ohm resistance should be compared with the input impedance of the receiving amplifier, and its 5 pC switch charge can contribute to transient movement when control signals change. The 100 pA maximum leakage specification is valuable when the selected source has high impedance. This role is appropriate for low-power signal selection rather than direct speaker or power-amplifier output switching.
Disebarkan
Industrial Sensor Interface
The MAX322CUA+ can route low-level industrial sensor signals when the system provides compatible dual supply rails and requires low leakage. Two independent SPST channels make it useful for selecting a sensor input or an isolation path, while the 1.25 mW operating consumption supports compact embedded instrumentation. Designers should verify the allowable input voltage range against the manufacturer electrical limits and include protection for transients common in industrial environments. Short traces, solid grounding, and isolation from switching regulators help preserve signal integrity.
Disebarkan
Ringkasan Produk Disebarkan
Data referensi kejuruteraan untuk MAX322CUA+ — perbandingan, panduan rancangan, dan maklumat kesediaan
Panduan Pilihan
Perbandingan dengan Gantian
| Parametr | Produk Ini | MAX322CUA |
|---|---|---|
| Package | 8-uMAX | 8-uMAX |
| Brand | Analog Devices | Analog Devices |
| Number of Switches | 2 circuits | 2 circuits |
| Switch Configuration | 1:1 | 1:1 |
| Switch Type | SPST, normally open | SPST, normally open |
| On-Resistance | 35 ohm | 35 ohm |
| Power Consumption | 1.25 mW | 1.25 mW |
| Leakage Current | 100 pA maximum | 100 pA maximum |
| Turn-On Time | 150 ns maximum | 150 ns maximum |
| Turn-Off Time | 100 ns maximum | 100 ns maximum |
| Switch Charge | 5 pC | 5 pC |
| Supply Configuration | Dual supply | Dual supply |
Penyeberangsung Jelas
- Low-power dual-channel precision routing (vsMAX322CUA)
- High-impedance measurement suitability (vsMAX322CUA)
- Fast control response for signal selection (vsMAX322CUA)
Catatan Desain
Treat the 35 ohm on-resistance as part of the signal-path transfer function. For a simplified source-resistance model, the voltage delivered to a high-impedance receiver would be reduced by the ratio of 35 ohm to the total series resistance plus receiver impedance. Keep the source impedance much lower than 35 ohm when insertion loss must remain small. Include switch charge of 5 pC and the connected node capacitance when evaluating control-signal transients.
Route each switched analog trace directly between the MAX322CUA+ and its source or destination, avoiding long shared paths and nearby digital-control traces. Place the device near the input multiplexer or measurement amplifier, maintain a continuous ground reference, and use a quiet analog supply arrangement. Because no pin-specific routing can be reproduced without the manufacturer pin-description table, assign every PCB track from the official 8-uMAX drawing.
Do not use the MAX322CUA+ as a power switch. Its 35 ohm on-resistance would create substantial voltage drop and heat when carrying meaningful load current. The device is intended for precision signal routing. Also avoid assuming that the MAX323, MAX324, or MAX325 single-supply families are interchangeable: their supply architecture differs, even though all belong to the broader MAX switch portfolio.
Estimated: with a 5 V total supply span and one channel continuously on, the idealized conduction loss at 35 ohm is approximately 4.46 mW when 10 mA flows. This estimate assumes a 10 mA load and a 5 V switch voltage, and it does not represent a manufacturer power rating. Actual dissipation depends on signal amplitude, duty cycle, both channels, supply conditions, and package thermal resistance.
Maklumat Kesediaan
RoHS-compliant and lead-free status is stated in the product listing. No separate REACH, halogen-free, or conflict-minerals declaration is established.
