Overview
The ADG508A is a monolithic CMOS analog multiplexer integrating eight bidirectional switches with a common output. Developed by Analog Devices, it serves as a precision solution for routing analog or digital signals in automated test equipment, medical instrumentation, and industrial control systems. Unlike mechanical relays, the solid-state design ensures millions of switching cycles without wear. The device operates from ±4.5V to ±18V dual supplies or +10V to +36V single supplies, accommodating diverse system requirements while maintaining signal integrity.
Structure and Working Principle
The IC comprises eight independently controlled SPST switches connected to a shared output pin (D). Each switch uses a charge pump to achieve low on-resistance (85Ω) across the full signal range (-15V to +15V). A 3-to-8 binary decoder activates one channel at a time based on address inputs (A0-A2), with an enable pin (EN) for master control. The TTL/CMOS-compatible logic interfaces simplify microcontroller integration. Internal diodes provide 2kV ESD protection per JEDEC Standard 22-A114-B.
Key Features
Ultra-low crosstalk (-90dB @ 1MHz) and charge injection (10pC) minimize signal distortion in sensitive measurement circuits. The break-before-make switching action prevents momentary shorting during channel transitions. Wide temperature operation (-40°C to +85°C) suits industrial environments. The 16-lead PDIP, SOIC, and TSSOP packages offer layout flexibility. Compared to earlier multiplexers, the ADG508A reduces power consumption by 60% through advanced CMOS process technology.
Application Areas
Industrial automation systems employ the ADG508A for sensor array scanning and PLC signal conditioning. In aerospace, it routes telemetry data with high reliability under vibration. Medical devices like patient monitors use its low-leakage characteristics (100pA max) for ECG lead switching. Audio mixers benefit from the -100dB off-isolation at 20kHz, ensuring clean channel separation. OEMs in semiconductor test equipment value its <0.01% THD for precision measurements.
Maintenance and Precautions
Ensure all input signals remain within supply rails to prevent latch-up. Use decoupling capacitors (0.1μF) near power pins to suppress switching noise. For high-frequency applications, minimize trace lengths to reduce parasitic capacitance. Avoid floating control inputs; tie unused address lines to ground. Thermal derating may be necessary when operating at maximum junction temperature (150°C). Periodic system calibration compensates for long-term on-resistance drift (<5Ω over 10,000 hours).
B2B Procurement Guide
Verify lead time (typically 6-8 weeks for non-stock items) and MOQ (100+ pieces for commercial pricing). Request factory authentication certificates for military-grade (-B version) applications. Evaluate alternative packaging options: SOIC for space-constrained designs, PDIP for prototyping. Distributors like Digi-Key and Mouser Electronics provide technical support for integration challenges. Consider second-source options like MAX4581 for supply chain redundancy.
Related Manufacturers
- 主营：放大器、检测器、滤波器、调制器、发射器、接收器、衰减器、解调器、变压器、合成器、收发器、偏置器、振荡器、rfid天线、终端负载、隔直流器、微波射频、集成电路、同轴开关、接入监控ic、频率综合器、射频适配器、多路复用器、耦合器电桥、定向耦合器
- 主营：集成逻辑芯片
- 主营：RENESAS瑞萨、单片机、时钟芯片、电源芯片、ADI亚德诺、美信、华邦芯片
- 主营：lm2576-12、晶闸管、hfcn-880+、hmc264lc3、cgb-1089z、lt3491edc、ixfh9n80q、lt6205cs5、hmc582lp5、hcpl-2612、lt6015is5、tcd-13-4+、hmc815lc5、pm5361-ei、hcpl-261a、lt1806is6、lt3437edd、lt3517iuf、acpl-785j、hsms-8101、mic4428cn、lt3008edc、lt1880is5、hmc523lc4、hfcn-740+
- 主营：snj54f02j、sn54hc11j、xr68c681n、xr68c681m、sn54s138j、md82c88/b、lt1028mj8、cd54hc11f、mhd2815df、dvsa2815s、ixfm6n100、sn55189aj、54ls379dm、max487mja、sn54ls49j、am7992bdc、cd54hc20f、lc20019c1、cx25.2000、lm108aj-8、max393mje、54f02/bca、max308mje、snj55183j、hcpl-5501
- 主营：集成电路IC、单片机、电容电阻电感、电解电容模块、芯片、微控制器、逻辑器件、二极管晶体管、保险丝、电源管理芯片、接口芯片、连接器端子、开关、射频无线芯片、储存器传感器、继电器蜂鸣器、马达 开关、数据转换芯片、通信模块
- 主营：二极管、稳压器、lmv358sop-8、lmv358msop8、长电长晶、集成电路、cj/长电长、az23c20sot-23、2sa1201sot-89、2sa1013sot-89、2sa1740sot-89、2sd1616ato-92、2sa1037sot-23、az23c12sot-23、2sa1036sot-23、2sa1585sot-23、2sa1204sot-89、az23c16sot-23、1sma4759asmag、cje3139ksot-523、恒压变压器、mbr10150to-220a、iccj431sot-89-3l
- 主营：IC芯片、集成电路、电子元器件、二极管
- 主营：bzt52c10s、ba45f6730、6098-0516、ee-sx872a、i5-6300hq、ki2048-mr、74hc4051d、aons62602、lm324dr2g、cm32m101a、锂电池、upc1237ha、ee-sx1042、bzx55c5v1、lrs-35-24、2sc1162-c、max998esa、ee-sx673a、tcd1304dg、bs45f3833、afb0812sh、swsw3516h、op2177arz、合成赢、ucc27323p
- 主营：pj-608-5a、sot-9x3-3、hvssop-10、to-220-7c、聚丙烯、sot-363-6、pg-dso-12、mpx5010dp、电阻smd、sod-323he、htssop-20、tdfn2x2-8、es1g-tr3g、sk310br5g、缓冲器、继电器、smf3w10rj、数码管、mpx5100dp、74hc4538d、es1d-tr3g、14d621k-b、byg20jr3g、连接器、rs1m-tr3g
- 主营：h8210kbda、74hc4017d、h8124rbca、amc80aipw、sm6t100ah、h4p10kfda、sn7407nsr、stef12pur、cb7jbr200、aev14024w、adm207anz、cfr16j56r、sqpw715rj、rtd34024f、smcj64ahe、复用器、el8302iuz、cfr16j4k7、tssop-8-b、h495k3bda、sgp1610n2、h8432kbya、ww1ft54r9、h812r1dca、8403615ja