SBAS901C July   2018  – October 2020 REF34-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1. 6.1 Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
  8. 8 Typical Characteristics
  9. 9 Parameter Measurement Information
    1. 9.1 Solder Heat Shift
    2. 9.2 Long-Term Stability
    3. 9.3 Thermal Hysteresis
    4. 9.4 Power Dissipation
    5. 9.5 Noise Performance
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1 Supply Voltage
      2. 10.3.2 Low Temperature Drift
      3. 10.3.3 Load Current
    4. 10.4 Device Functional Modes
      1. 10.4.1 EN Pin
  11. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Applications
      1. 11.2.1 Basic Voltage Reference Connection
        1. 11.2.1.1 Design Requirements
        2. 11.2.1.2 Detailed Design Procedure
          1. 11.2.1.2.1 Input and Output Capacitors
          2. 11.2.1.2.2 4-Wire Kelvin Connections
          3. 11.2.1.2.3 VIN Slew Rate Considerations
          4. 11.2.1.2.4 Shutdown/Enable Feature
        3. 11.2.1.3 Application Curves
      2. 11.2.2 Advanced Driver Assistance Systems (ADAS) Microcontroller Connection
        1. 11.2.2.1 Basic Voltage Reference Connection
        2. 11.2.2.2 Design Requirements
        3. 11.2.2.3 Detailed Design Procedure
        4. 11.2.2.4 Enable Feature in ADAS
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
  14. 14Device and Documentation Support
    1. 14.1 Documentation Support
      1. 14.1.1 Related Documentation
    2. 14.2 Receiving Notification of Documentation Updates
    3. 14.3 Support Resources
    4. 14.4 Trademarks
    5. 14.5 Electrostatic Discharge Caution
    6. 14.6 Glossary
  15. 15Mechanical, Packaging, and Orderable Information

7.5 Electrical Characteristics

At VIN = VOUT + VDO, COUT = 10 µF, CIN = 0.1 µF, IL = 0 mA, minimum and maximum specifications at TA = –40℃ to 125℃; Typical specifications at TA = 25℃ unless otherwise noted
PARAMETER TEST CONDITION MIN TYP MAX UNIT
ACCURACY AND DRIFT
Output voltage accuracy TA = 25℃ –0.05 0.05 %
Output voltage temperature coefficient (1) 2.5 6 ppm/℃
LINE & LOAD REGULATION
ΔVO/ΔVIN Line Regulation VIN = VOUT + VDO (2) to 12 V 2 ppm/V
VIN = VOUT + VDO (2) to 12 V 15
ΔVO/ΔIL Load Regulation IL = 0 mA to 10mA, VIN = VOUT+ VDO (3) Sourcing 20 ppm/mA
Sourcing 30
IL = 0 mA to –10mA, VIN = VOUT+ VDO (3) Sinking, REF3425-Q1 40
Sinking, REF3430-Q1 43
Sinking, REF3433-Q1 48
Sinking, REF3440-Q1 60
Sinking, REF3450-Q1 70
Sinking, REF3425-Q1 70
Sinking, REF3430-Q1 75
Sinking, REF3433-Q1 84
Sinking, REF3440-Q1 98
Sinking, REF3450-Q1 140
NOISE
enp-p Low frequency noise (4) 0.1Hz ≤ f ≤ 10Hz 5 µV p–p/V
0.1Hz ≤ f ≤ 10Hz (REF3440–Q1 and REF3450–Q1) 3.8
en Integrated wide band noise 10Hz ≤ f ≤ 10kHz 24 µVrms
en Output voltage noise density f = 1kHz 0.25 ppm/√Hz
 
f = 1kHz (REF3440–Q1 and REF3450–Q1) 0.2
LONG TERM STABILITY AND HYSTERESIS
Long-term stability (5) DBV Package 0 to 1000h at 35℃  25 ppm
1000h to 2000h at 35℃  10
Long-term stability (5) DGK Package 0 to 1000h at 35℃  17
Output voltage thermal hysteresis (6) DBV Package 25°C, –40°C,125°C, 25°C Cycle 1 30 ppm
25°C, –40°C,125°C, 25°C Cycle 2 10
DGK Package 25°C, –40°C,125°C, 25°C Cycle 1 20
25°C, –40°C,125°C, 25°C Cycle 2 10
TURN-ON TIME
tON Turn-on time 0.1% of output voltage settling, CL = 10 µF, REF3425–Q1 2.5 ms
CAPACITIVE LOAD
CL Stable output capacitor range 0.1 10 µF
OUTPUT VOLTAGE
VOUT Output voltage REF3425Q1 2.5 V
REF3430Q1 3.0
REF3433Q1 3.3
REF3440Q1 4.096
REF3450Q1 5.0
POWER SUPPLY
VIN Input voltage VOUT + VDO 12 V
IL Output current capacity VIN = VOUT + VDO to 12 V –10 10 mA
IQ Quiescent current Active mode 72 95 µA
Shutdown mode (7) 2.5 3
VDO Dropout voltage IL = 0 mA 50 mV
IL = 0 mA 100
IL = 10 mA 500
VEN ENABLE pin voltage (7) Voltage reference in active mode (EN = 1) 1.6 V
Voltage reference in shutdown mode (EN = 0) 0.5
IEN ENABLE pin leakage current (7) VEN = VIN = 12V 1 2 µA
ISC Short circuit current VOUT = 0 V at TA = 25°C 18 22 mA
(1) Temperature drift is specified according to the box method. See Low Temperature Drift section for more details.
(2) VDO for line regulation test is 50 mV.
(3) VDO for load regulation test is 500 mV.
(4) The peak-to-peak noise measurement is explained in more detail in section Noise Performance.
(5) Long-term stability measurement procedure is explained in more detail in section Long–Term Stability.
(6) Thermal hysteresis measurement procedure is explained in more detail in section Thermal Hysteresis.
(7) Not applicable for REF34S device (DBV - 5 pin package)