SLAS836 March   2014 AMC7832

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Power Amp Biasing Diagram
  5. 5 Revision History
  6. 6 Terminal Configuration and Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  Handling Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Electrical Characteristics
    6. 7.6  Timing Requirements - Serial Interface
    7. 7.7  Typical Characteristics: DAC
    8. 7.8  Typical Characteristics: ADC
    9. 7.9  Typical Characteristics: Reference
    10. 7.10 Typical Characteristics: Temperature Sensor
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Digital-to-Analog Converters (DACs)
        1. 8.3.1.1 DAC Output Range and Clamp Configuration
        2. 8.3.1.2 DAC Register Structure
        3. 8.3.1.3 DAC Clear Operation
      2. 8.3.2 Analog-to-Digital Converter (ADC)
        1. 8.3.2.1 Analog Inputs
          1. 8.3.2.1.1 Bipolar Analog Inputs
          2. 8.3.2.1.2 Unipolar Analog Inputs
        2. 8.3.2.2 ADC Sequencing
        3. 8.3.2.3 ADC Synchronization
        4. 8.3.2.4 Programmable Out-of-Range Alarms
          1. 8.3.2.4.1 Unipolar Inputs Out-of-Range Alarms
          2. 8.3.2.4.2 Internal Temperature Sensor Out-of-Range Alarms
          3. 8.3.2.4.3 ALARMIN Alarm
          4. 8.3.2.4.4 Hysteresis
          5. 8.3.2.4.5 False-Alarm Protection
      3. 8.3.3 Internal Temperature Sensor
      4. 8.3.4 Internal Reference
      5. 8.3.5 General Purpose I/Os
    4. 8.4 Programming
    5. 8.5 Register Map
      1. 8.5.1  Interface Configuration: Address 0x00 - 0x02
      2. 8.5.2  Device Identification: Address 0x03 - 0x0D
      3. 8.5.3  Register Update (Buffered Registers): Address 0x0F
      4. 8.5.4  General Device Configuration: Address 0x10 - 0x17
      5. 8.5.5  DAC Clear And ALARMOUT Source Select: Address 0x1A - 0x1D
      6. 8.5.6  DAC Range: Address 0x1E
      7. 8.5.7  ADC Data: Address 0x20 - 0x41
      8. 8.5.8  DAC Data: Address 0x50 - 0x67
      9. 8.5.9  Status Registers: Address 0x70 - 0x72
      10. 8.5.10 Temperature And GPIO Data: Address 0x78 - 0x7A
      11. 8.5.11 Out-Of-Range ADC Thresholds: Address 0x80 - 0x93
      12. 8.5.12 Hysteresis: Address 0xA0 - 0xA5
      13. 8.5.13 Power-Down Registers: Address 0xB0 - 0xB3
      14. 8.5.14 ADC Trigger: Address 0xC0
  9. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Application Schematic
      2. 9.2.2 Design Requirements
      3. 9.2.3 Detailed Design Procedure
        1. 9.2.3.1 ADC Input Conditioning
        2. 9.2.3.2 DAC Output Range Selection
        3. 9.2.3.3 Temperature Sensing Applications
        4. 9.2.3.4 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Trademarks
    2. 12.2 Electrostatic Discharge Caution
    3. 12.3 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

6 Terminal Configuration and Functions

HTQFP- 64
PAP Package
(Top View)
PO_las836.gif

Terminal Functions

TERMINAL DESCRIPTION
NUMBER NAME
1 DGND Digital ground. Ground reference point for all digital circuitry on the device. Ideally, AGND and DGND should be at the same potential (GND) and must not differ by more than ±0.3-V.
2 DVDD Digital supply voltage. (+4.5-V to +5.5-V). Must be the same value as AVDD.
3 IOVDD IO supply voltage. (+1.8-V to +5.5-V). Sets the IO operating voltage and threshold levels. Must not exceed DVDD.
4 RESET Reset input, active low. Logic low on this terminal causes the device to perform a hardware reset.
5 SDO Serial interface data output. The SDO terminal is in high impedance when CS is high. Data is clocked out of the input shift register on each falling edge of SCLK.
6 SDI Serial interface data input. Data is clocked into the input shift register on each rising edge of SCLK.
7 SCLK Serial interface clock.
8 CS Active low serial data enable. This input is the frame synchronization signal for the serial data. When this signal goes low, it enables the input shift register.
9 GPIO0/ALARMIN General purpose digital I/O 0 (default). This terminal is a bidirectional open-drain, digital input/output with internal 48-kΩ pull-up resistor to IOVDD. Alternatively the terminal can be set to operate as ALARMIN, an alarm control signal, digital input, active low.
10 GPIO1/ ALARMOUT General purpose digital I/O 1 (default). This terminal is a bidirectional open-drain, digital input/output with internal 48-kΩ pull-up resistor to IOVDD. Alternatively the terminal can be set to operate as ALARMOUT, a global alarm. Open drain output. This terminal goes low (active) when an alarm event is detected.
11 GPIO2/ADCTRIG General purpose digital I/O 2 (default). This terminal is a bidirectional open-drain, digital input/output with internal 48-kΩ pull-up resistor to IOVDD. Alternatively the terminal can be set to operate as ADCTRIG, an external conversion trigger, active low. The falling edge starts the sampling and conversion of the ADC.
12 GPIO3/DAV General purpose digital I/O 3 (default). This terminal is a bidirectional open-drain, digital input/output with internal 48-kΩ pull-up resistor to IOVDD. Alternatively the terminal can be set to operate as DAV, Data available indicator, active low output. In direct mode, the DAV terminal goes low (active) when the conversion ends. In auto mode, a 1µs pulse (active low) appears on this terminal when a conversion cycle finishes. DAV stays high when deactivated.
13 GPIO-4 General purpose digital I/O. This terminal is a bidirectional open-drain, digital input/output with internal 48-kΩ pull-up resistor to IOVDD.
14 GPIO-5
15 GPIO-6
16 GPIO-7
17 AVEE Lowest potential in the system. Typically tied to -12-V but if all DACs are set in a positive output range it should be connected to AGND.
18,19, 22, 24 DAC_A11,
DAC_A10,
DAC_A9,
DAC_A8 		DAC group A. These channels share the same range and clamp voltage.
20 AVSSA Negative analog supply for DAC group A. Sets the power-on-reset and clamp voltage values. Typically tied to AVEE when the DAC range for group A is set to -10 to 0-V or AGND for the positive output ranges.
21 VRANGEA This terminal determines the DAC range for DAC group A. If tied to AGND the DAC range is 0 to +5-V or 0 to+10-V. Otherwise if tied to +2.5-V (can be tied to REF_OUT terminals) the DAC range is -10 to 0-V.
23 AGND1 Analog ground. Ground reference point for all analog circuitry on the device, AGND. Connect AGND1, AGND2 and AGND3 to the same potential, AGND.
25 AVCC_AB Positive analog power for DAC groups A and B. Must be tied to AVCC_CD.
26 VRANGEB This terminal determines the DAC range for DAC group B. If tied to AGND the DAC range is 0 to +5-V or 0 to +10-V. Otherwise if tied to +2.5-V (can be tied to REF_OUT terminals) the DAC range is -10 to 0-V.
27, 29 DAC_B7,
DAC_B6		 DAC group B. These channels share the same range and clamp voltage.
28 AVSSB Negative analog supply for DAC group B. Sets the power-on-reset and clamp voltage values. Typically tied to AVEE when the DAC range for group B is set to -10 to 0-V or AGND for the positive output ranges.
30 REF_OUT1 Reference output 1. Can be used to drive the VRANGE inputs.
31 AVDD1 Analog supply voltage. (+4.5-V to +5.5-V)
32 REF_CMP Internal reference compensation capacitor connection (connect 4.7-μF capacitor between this terminal and AGND2).
33 AGND2 Analog ground. Ground reference point for all analog circuitry on the device, AGND. Connect AGND1, AGND2 and AGND3 to the same potential, AGND.
34 AVDD2 Analog supply voltage. (+4.5-V to +5.5-V)
35-38 ADC_11,
ADC_10,
ADC_9,
ADC_8		 Bipolar analog inputs. Typically used to monitor the DAC_A8 to DAC_A11 outputs. The input range of these channels is -12.5-V to +12.5-V.
39-40 ADC_7,
ADC_6		 Bipolar analog inputs. Typically used to monitor the DAC_B6 to DAC_B7 outputs. The input range of these channels is -12.5-V to +12.5-V.
41-45 LV_ADC16 to LV_ADC12 Unipolar analog inputs. These channels are used for general monitoring and their input range is 0 to 2 x VREF.
46-49 ADC_5,
ADC_4,
ADC_3,
ADC_2		 Bipolar analog inputs. Typically used to monitor the DAC_D2 to DAC_D5 outputs. The input range of these channels is -12.5-V to +12.5-V.
50-51 ADC_1,
ADC_0		 Bipolar analog inputs. Typically used to monitor the DAC_C0 to DAC_C1 outputs. The input range of these channels is -12.5-V to +12.5-V.
52,54 DAC_C1,
DAC_C0		 DAC group C. These channels share the same range and clamp voltage.
53 AVSSC Negative analog supply for DAC group C. Sets the power-on-reset and clamp voltage values. Typically tied to AVEE when the DAC range for group C is set to -10 to 0-V or AGND for the positive output ranges.
55 VRANGEC This terminal determines the DAC range for DAC group C. If tied to AGND the DAC range is 0 to +5-V or 0 to +10-V. Otherwise if tied to +2.5-V (can be tied to REF_OUT terminals) the DAC range is -10 to 0-V.
56 REF_OUT2 Reference output 2. Can be used to drive the VRANGE inputs.
57 AVCC_CD Positive analog power for DAC groups C and D. Must be tied to AVCC_AB.
58, 60, 63, 64 DAC_D5,
DAC_D4,
DAC_D3,
DAC_D2 		DAC group D. These channels share the same range and clamp voltage.
59 AGND3 Analog ground. Ground reference point for all analog circuitry on the device, AGND. Connect AGND1, AGND2 and AGND3 to the same potential, AGND.
61 VRANGED This terminal determines the DAC range for DAC group D. If tied to AGND the DAC range is 0 to 5-V or 0 to 10-V. Otherwise if tied to +2.5-V (can be tied to REF_OUT terminals) the DAC range is -10 to 0-V.
62 AVSSD Negative analog supply for DAC group D. Sets the power-on-reset and clamp voltage values. Typically tied to AVEE when the DAC range for group D is set to -10 to 0-V or AGND for the positive output ranges.
— THERMAL PAD The thermal pad is located on the package underside. Should be tied to AVEE or left unconnected.