ADG5249F User Defined Fault Protection and Detection, 0.8 pC QINJ, Dual 4:1 Multiplexers

Source pins are protected against voltages greater than the secondary supply rails, up to −55 V and +55 V. Source pins are protected against voltages between −55 V and +55 V in an unpowered state. Overvoltage detection with digital output indicates operating state of switches. Trench isolation guards against latch-up. Optimized for low charge injection and on-capacitance. The ADG5248F/ADG5249F can be operated from a dual supply of ±5 V to ±22 V or a single power supply of 8 V to 44 V.

The ADG5248F and ADG5249F are 8:1 and dual 4:1 analog multiplexers. The ADG5248F switches one of eight inputs to a common output and the ADG5249F switches one of four differential inputs to a common differential output. Each channel conducts equally well in both directions when on, and each channel has an input signal range that extends to the supplies. The primary supply voltages define the on-resistance profile, whereas the secondary supply voltages define the voltage level at which the overvoltage protection engages.

When no power supplies are present, the channel remains in the off condition, and the switch inputs are high impedance. Under normal operating conditions, if the analog input signal levels on any Sx pin exceed positive fault voltage (POSFV) or negative fault voltage (NEGFV) by a threshold voltage (VT), the channel turns off and that Sx pin becomes high impedance. If the switch is selected to be on, then the drain pin is pulled to the secondary supply voltage that was exceeded. Input signal levels up to +55 V or −55 V relative to ground are blocked, in both the powered and unpowered condition.

The low capacitance and charge injection of these switches make them ideal solutions for data acquisition and sample-and-hold applications, where low glitch switching and fast settling times are required.

Note that, throughout this data sheet, multifunction pins, such as A0/F2, are referred to either by the entire pin name or by a single function of the pin, for example, A0, when only that function is relevant.

Product Highlights
  • Source pins are protected against voltages greater than the secondary supply rails, up to −55 V and +55 V.
  • Source pins are protected against voltages between −55 V and +55 V in an unpowered state.
  • Overvoltage detection with digital output indicates operating state of switches.
  • Trench isolation guards against latch-up.
  • Optimized for low charge injection and on-capacitance.
  • The ADG5248F/ADG5249F can be operated from a dual supply of ±5 V to ±22 V or a single power supply of 8 V to 44 V.
Applications
  • Analog input/output modules
  • Process control/distributed control systems
  • Data acquisition
  • Instrumentation
  • Avionics
  • Automatic test equipment
  • Communication systems
  • Relay replacement
Features and Benefits
  • User defined secondary supplies set overvoltage level
    • Overvoltage protection up to −55 V and +55 V
    • Power-off protection up to −55 V and +55 V
    • Overvoltage detection on source pins
    • Minimum secondary supply level: 4.5 V single-supply
    • Interrupt flags indicate fault status
  • Overvoltage protection up to −55 V and +55 V
  • Power-off protection up to −55 V and +55 V
  • Overvoltage detection on source pins
  • Minimum secondary supply level: 4.5 V single-supply
  • Interrupt flags indicate fault status
  • Low charge injection (QINJ): 0.8 pC
  • Low drain/source on capacitance: 14 pF
  • Latch-up immune under any circumstance
  • Known state without digital inputs present
  • VSS to VDD analog signal range
    • ±5 V to ±22 V dual-supply operation
    • 8V to 44 V single-supply operation
    • Fully specified at ±15 V, ±20 V, +12 V, and +36 V
  • ±5 V to ±22 V dual-supply operation
  • 8V to 44 V single-supply operation
  • Fully specified at ±15 V, ±20 V, +12 V, and +36 V
  • Switches & Multiplexers
    IBIS Models
    Data Sheets
    Documentnote
    ADG5248F/ADG5249F: User Defined Fault Protection and Detection, 0.8 pC QINJ, 8:1/Dual 4:1 Multiplexers (Rev. A)PDF 660.67 K
    Application Notes
    Documentnote
    AN-1380: Generating Secondary Fault Supplies for Fault Protected SwitchesPDF 184.23 K
    User Guides
    Documentnote
    UG-878: Evaluation Board for the ADG5249F, Overvoltage Protected Dual 4:1 Multiplexer (Rev. 0)PDF 620.21 K
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    ADG5249FBCPZ-RL7 ProductionLFCSP:LEADFRM CHIP SCALEREEL 150004.55Y
    ADG5249FBRUZ Production20 ld TSSOPOTH 75-40 to 125C5.554.55Y
    ADG5249FBRUZ-RL7 Production20 ld TSSOPREEL 1000-40 to 125C04.55Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    EVAL-ADG5249FEBZEvaluation Board60Y
    Reference Materials
    ADG5248F/ADG5249F:用户自定义故障保护和检测、 0.8 pC Q INJ 、 8:1/ 双通道 4:1 多路复用器 (Rev. A) adg5248f
    ADG5248F/ADG5249F: User Defined Fault Protection and Detection, 0.8 pC QINJ, 8:1/Dual 4:1 Multiplexers (Rev. A) adg5248f
    ADG5249F IBIS Model adg5249f
    AN-1380:产生故障保护开关的副故障电源 adg5462f
    AN-1380: Generating Secondary Fault Supplies for Fault Protected Switches adg5462f
    UG-878: Evaluation Board for the ADG5249F, Overvoltage Protected Dual 4:1 Multiplexer (Rev. 0) adg5249f
    用过压故障保护模拟开关代替分立保护器件 adg5404