SNOSB21E May   2008  – July 2024 LMH6518

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Input Preamplifier
        1. 6.3.1.1 Primary Output Amplifier
        2. 6.3.1.2 Auxiliary Amplifier
      2. 6.3.2 Overvoltage Clamp
      3. 6.3.3 Attenuator
      4. 6.3.4 Digital Control Block
    4. 6.4 Device Functional Modes
      1. 6.4.1 Primary Amplifier
      2. 6.4.2 Auxiliary Output
    5. 6.5 Programming
      1. 6.5.1 Logic Functions
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Oscilloscope Front End
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
          1. 7.2.1.2.1 Settings and ADC SPI Code (ECM)
          2. 7.2.1.2.2 Input and Output Considerations
            1. 7.2.1.2.2.1 Output Swing, Clamping, and Operation Beyond Full Scale
          3. 7.2.1.2.3 Oscilloscope Trigger Applications
        3. 7.2.1.3 Application Curves
      2. 7.2.2 JFET LNA Implementation
        1. 7.2.2.1 Design Requirements
        2. 7.2.2.2 Detailed Design Procedure
          1. 7.2.2.2.1 Attenuator Design
        3. 7.2.2.3 Application Curve
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Third-Party Products Disclaimer
      2. 8.1.2 Device Nomenclature
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RGH|16
Thermal pad, mechanical data (Package|Pins)
Orderable Information

4 Pin Configuration and Functions

Figure 4-1 RGH Package, 16-Pin WQFN (Top View)
Table 4-1 Pin Functions
PINTYPE(1)DESCRIPTION
NO.NAME
1+OUT AUXOAuxiliary positive output
2−OUT AUXOAuxiliary negative output
3VCCPAnalog power supply
4 VCC P Analog power supply
5GNDGGround, electrically connected to the WQFN heat sink
6+INIPositive input
7–ININegative input
8 GND G Ground, electrically connected to the WQFN heat sink
9CSISerial chip select (SPI, active low): While this signal is asserted, SCLK is used to accept serial data present on SDIO and to source serial data on SDIO. When this signal is deasserted, SDIO is ignored and SDIO is in a high-impedance state.
10SDIOI/OSerial data-in or data-out (SPI). During a write operation, serial data are shifted into the device (8-bit command and 16-bit data) on this pin while CS signal is asserted. During a read operation, serial data are shifted out of the device on this pin while CS signal is asserted. At other times, and after one complete access cycle (24 bits; see Figure 6-1 and Figure 6-2), this input is ignored. This output is in a high-impedance state when CS is deasserted. This pin is bidirectional.
11SCLKISerial clock (SPI): Serial data are shifted into and out of the device synchronous with this clock signal. SCLK transitions with CS deasserted are ignored. To minimize digital crosstalk, stop SCLK when not used.
12VDDPDigital power supply
13VCMIInput from ADC to control main output common mode (CM) voltage
14−OUTOMain negative output
15+OUTOMain positive output
16VCM_AUXIInput to control auxiliary output CM voltage
PadThermal Pad—Thermal pad (WQFN heat sink), electrically connected to pins 5 and 8 (GND)
(1) G = ground, I = input, O = output, P = power