REF5020
Precision Voltage ReferenceThe REF5020 is a precision voltage reference from Texas Instruments. View the full REF5020 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
REF5020 shares its datasheet with REF5050, whose page lists every part number it covers.
Official REF5020 datasheet (PDF) — the source this page was extracted from.
Manufacturer
Texas InstrumentsCategory
Voltage ReferencesREF5020 Key Specifications
| Parameter | Value |
|---|---|
| Output voltage | 5 V (REF5050) |
| Initial accuracy | ±0.025% (EI), ±0.05% (I), ±0.1% (AI) |
| Temperature drift (-40 to 125 °C) | 2.5 ppm/°C max (EI), 3 ppm/°C max (I), 8 ppm/°C max (AI) |
| Low-frequency noise (0.1–10 Hz) | 0.5 μVPP/V typ (EI), 3 μVPP/V typ (I/AI) |
| Line regulation | 3 ppm/V max at 25 °C (5 ppm/V max over temperature) |
| Load regulation (±10 mA) | 25 ppm/mA max (EI), 30 ppm/mA max (I/AI) |
| Quiescent current | 480 μA max (EI), 1.2 mA max (I/AI) |
| Short-circuit current | 21 mA typ (EI), 25 mA typ (I/AI) |
| Turn-on settling time (to 0.1%, CL = 1 μF) | 400 μs typ (EI), 200 μs typ (I/AI) |
| Long-term stability (0–1000 h, SOIC-8) | 25 ppm typ (EI), 22 ppm typ (I/AI); VSSOP-8: 50 ppm typ (I/AI) |
REF5020 Overview
Part: REF5050 (REF50xx family; REF5050EI / REF5050I / REF5050AI) — Texas Instruments
Type: Precision Series Voltage Reference (5.0 V output)
Description: Low-noise, low-drift 5.0 V precision voltage reference with ±10 mA sink/source capability, drift down to 2.5 ppm/°C and initial accuracy to ±0.025% (enhanced grade), with VIN up to 42 V (enhanced grade) or 18 V (high/standard grade).
Operating Conditions:
- Supply voltage (VIN): VOUT + 0.2 V to 18 V (REF50xxI/AI); VOUT + 0.2 V to 42 V (REF50xxEI)
- Operating temperature: -40 to 125 °C (specified)
- Output current: ±10 mA
- NR pin (REF50xxEI): 0 to 6 V
Absolute Maximum Ratings:
- Input voltage VIN: -0.3 to 18 V (REF50xxI/AI); -0.3 to 48 V (REF50xxEI)
- Output voltage VOUT: -0.3 to 5.5 V
- Junction temperature (TJ max): 150 °C
- Storage temperature: -65 to 150 °C
- Operating temperature (TA): -55 to 125 °C
Key Specs:
- Output voltage: 5 V (REF5050)
- Initial accuracy: ±0.025% (EI), ±0.05% (I), ±0.1% (AI)
- Temperature drift (-40 to 125 °C): 2.5 ppm/°C max (EI), 3 ppm/°C max (I), 8 ppm/°C max (AI)
- Low-frequency noise (0.1–10 Hz): 0.5 μVPP/V typ (EI), 3 μVPP/V typ (I/AI)
- Line regulation: 3 ppm/V max at 25 °C (5 ppm/V max over temperature)
- Load regulation (±10 mA): 25 ppm/mA max (EI), 30 ppm/mA max (I/AI)
- Quiescent current: 480 μA max (EI), 1.2 mA max (I/AI)
- Short-circuit current: 21 mA typ (EI), 25 mA typ (I/AI)
- Turn-on settling time (to 0.1%, CL = 1 μF): 400 μs typ (EI), 200 μs typ (I/AI)
- Long-term stability (0–1000 h, SOIC-8): 25 ppm typ (EI), 22 ppm typ (I/AI); VSSOP-8: 50 ppm typ (I/AI)
Features:
- Enhanced, high and standard grades
- Sinks and sources current
- TEMP pin for temperature monitoring (EI: 625 mV typ; I/AI: 575 mV typ; 2.64 mV/°C)
- EN pin for shutdown (REF50xxEI)
- Noise reduction (NR) pin (EI) or TRIM/NR pin (I/AI)
- ESD: HBM ±2000 V / CDM ±500 V (EI); HBM ±3000 V / CDM ±1000 V (I/AI)
Applications:
- Precision data acquisition systems
- Semiconductor test equipment
- Industrial process controls
- Medical instrumentation
- Pressure and temperature transmitters
- Lab and field instrumentation
Package:
- D (SOIC-8), 4.90 mm × 3.91 mm (all grades)
- DGK (VSSOP-8), 3.00 mm × 3.00 mm (REF50xxI, REF50xxAI only)
REF5020 Features
- Low temperature drift (maximum):
- -Enhanced-grade (new): 2.5ppm/°C
- -High-grade: 3ppm/°C
- -Standard-grade: 8ppm/°C
- High accuracy (maximum):
- -Enhanced-grade: 0.025%
- -High-grade: 0.05%
- -Standard-grade: 0.1%
- Low noise:
- -Enhanced-grade: 0.5μVPP/V
- -High/standard-grade: 3μVPP/V
- Excellent long-term stability:
- -22ppm after first 1000 hours (SOIC-8)
- -50ppm after first 1000 hours (VSSOP-8)
- Wide input voltage support:
- -Enhanced-grade: 42V
- -High/standard-grade: 18V
- High-output current: ±10mA
- Temperature range: -40°C to 125°C
REF5020 Applications
REF5020 Pin Configuration
Figure 5-1. REF50xxAI, REF50xxI 8-Pin SOIC, VSSOP Top View
Table 4-2. Device Performance Comparison
Figure 5-2. REF50xxEI 8-Pin SOIC Top View
Table 5-1. Pin Functions
| PIN - NAME | PIN - REF50xxI, REF50xxAI | PIN - REF50xxEI | DESCRIPTION |
|---|---|---|---|
| DNC | 1, 8 | 8 | Do not connect |
| EN | - | 1 | Device enable control. Low level input disables the reference output and device enters shutdown mode. Device can be enabled by driving voltage > 1.6V or leaving the EN pin floating. |
| GND | 4 | 4 | Ground |
| NC | 7 | No internal connection | |
| NC | 7 | Leave floating or connect to GND | |
| NR | - | 5 | Noise reduction pin |
| TEMP | 3 | 3 | Temperature monitoring pin. Provides a temperature-dependent output voltage |
| TRIM/NR | 5 | - | Output adjustment or noise reduction pin |
| V IN | 2 | 2 | Input supply voltage |
| V OUT | 6 | 6 | Reference voltage output |
Table 5-1. Pin Functions
REF5020 Electrical Characteristics
At TA = 25°C, I LOAD = 0, CL = 1μF and V IN = (V OUT + 0.2V) to 18V, unless otherwise noted
| PARAMETER | PARAMETER | TEST CONDITION | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|---|
| OUTPUT VOLTAGE | OUTPUT VOLTAGE | OUTPUT VOLTAGE | OUTPUT VOLTAGE | OUTPUT VOLTAGE | OUTPUT VOLTAGE | OUTPUT VOLTAGE |
| V OUT | Output Voltage | REF5020 (V OUT = 2.048V) (1) , 2.7V < V IN < 18V | 2.048 | V | ||
| V OUT | REF5025 | 2.5 | V | |||
| V OUT | REF5030 | 3.0 | V | |||
| V OUT | REF5040 | 4.096 | V | |||
| V OUT | REF5045 | 4.5 | V | |||
| V OUT | REF5050 | 5 | V | |||
| V OUT | REF5010 | 10 | V | |||
| Initial | High Grade | All voltage options (1) | -0.05 | 0.05 | % | |
| Accuracy | Standard Grade | All voltage options (1) | -0.1 | 0.1 | % | |
| NOISE | NOISE | NOISE | NOISE | NOISE | NOISE | NOISE |
| e npp | Low Frequency noise | ƒ = 0.1Hz to 10Hz | 3 | μV PP /V | ||
| e n | Output Voltage Noise | ƒ = 10Hz to 1kHz | 0.9 | μV rms /V | ||
| OUTPUT VOLTAGE TEMPERATURE DRIFT | OUTPUT VOLTAGE TEMPERATURE DRIFT | OUTPUT VOLTAGE TEMPERATURE DRIFT | OUTPUT VOLTAGE TEMPERATURE DRIFT | OUTPUT VOLTAGE TEMPERATURE DRIFT | OUTPUT VOLTAGE TEMPERATURE DRIFT | OUTPUT VOLTAGE TEMPERATURE DRIFT |
| dV OUT /dT | High grade | T = -40°C to 125°C | 2.5 | 3 | pm/ °C | |
| Standard grade | A | 3 | 8 | pm/ °C | ||
| LINE REGULATION | LINE REGULATION | LINE REGULATION | LINE REGULATION | LINE REGULATION | LINE REGULATION | LINE REGULATION |
| ΔV O(ΔVI) | Line regulation | V IN = (V OUT + 0.2V) to 18V (1) | 1 | 3 | ppm/V | |
| ΔV O(ΔVI) | V IN = (V OUT + 0.2V) TO 18V, T A = -40°C to 125°C (1) | 1 | 5 | ppm/V | ||
| LOAD REGULATION | LOAD REGULATION | LOAD REGULATION | LOAD REGULATION | LOAD REGULATION | LOAD REGULATION | LOAD REGULATION |
| ΔV O(ΔIL) | Load regulation | -10mA < I OUT < 10mA, V IN = V OUT + 0.75V (2) | 20 | 30 | ppm/mA | |
| ΔV O(ΔIL) | 10mA < I OUT < 10mA, V IN = V OUT + 0.75V (2) , T A = -40°C to 125°C | 50 | ppm/mA | |||
| SHORT-CIRCUIT CURRENT | SHORT-CIRCUIT CURRENT | SHORT-CIRCUIT CURRENT | SHORT-CIRCUIT CURRENT | SHORT-CIRCUIT CURRENT | SHORT-CIRCUIT CURRENT | SHORT-CIRCUIT CURRENT |
| I SC | Short circuit current | V OUT = 0 | 25 | mA | ||
| THERMAL HYSTERESIS | THERMAL HYSTERESIS | THERMAL HYSTERESIS | THERMAL HYSTERESIS | THERMAL HYSTERESIS | THERMAL HYSTERESIS | THERMAL HYSTERESIS |
| High grade | VSSOP-8 | Cycle 1 | 50 | ppm | ||
| High grade | Cycle 2 | 40 | ppm | |||
| High grade | SOIC-8 | Cycle 1 | 70 | ppm | ||
| High grade | Cycle 2 | 50 | ppm | |||
| Standard grade | VSSOP-8 | Cycle 1 | 70 | ppm | ||
| Standard grade | Cycle 2 | 40 | ppm | |||
| Standard grade | SOIC-8 | Cycle 1 Cycle 2 | 90 50 | ppm | ||
| LONG-TERM STABILITY | LONG-TERM STABILITY | LONG-TERM STABILITY | LONG-TERM STABILITY | LONG-TERM STABILITY | LONG-TERM STABILITY | LONG-TERM STABILITY |
| ΔV OUT_LTD | VSSOP-8 | 0 to 1000 hours | 50 | ppm | ||
| ΔV OUT_LTD | 1000 to 2000 hours | 25 | ppm | |||
| ΔV OUT_LTD | SOIC-8 | 0 to 1000 hours | 22 | ppm | ||
| TEMP PIN | TEMP PIN | TEMP PIN | TEMP PIN | TEMP PIN | TEMP PIN | TEMP PIN |
| Voltage output | Voltage output | 575 | mV | |||
| Temperature sensitivity | Temperature sensitivity | T A = -40°C to 125°C | 2.64 | mV/ °C |
REF5020 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Input voltage | V IN (2) | -0.3 | 18 | V |
| V IN (3) | -0.3 | 48 | V | |
| Output Voltage | V OUT | -0.3 | 5.5 | V |
| Operating temperature | (T A ) | -55 | 125 | °C |
| Junction temperature | (T J max) | 150 | °C | |
| Storage temperature range | (T stg ) | -65 | 150 | °C |
- (2) Specification for REF5xxI and REF50xxAI.
- (3) Specification for REF50xxEI.
REF5020 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| MIN | NOM | MAX | UNIT | ||
|---|---|---|---|---|---|
| V IN | Input voltage (2) | V OUT + 0.2 (1) | 18 | V | |
| V IN | Input voltage (3) | V OUT + 0.2 | 42 | V | |
| NR | Noise reduction (3) | 0 | 6 | V | |
| I OUT | Output current | -10 | 10 | mA | |
| T A | Operating ambient temperature | -40 | 25 | 125 | °C |
- (1) Except for the REF5020, where VIN (minimum) = 2.7V.
- (2) Specification for REF50xxI and REF50xxAI.
- (3) Specification for REF50xxEI.
REF5020 Thermal Information
| REF50xxEI | REF50xxI , REF50xxAI | REF50xxI , REF50xxAI | |||
|---|---|---|---|---|---|
| THERMAL METRIC (1) | THERMAL METRIC (1) | D (SOIC) 8 PINS | D (SOIC) | DGK (VSSOP) | UNIT |
| Junction-to-ambient thermal resistance | 120 | 8 PINS | 8 PINS | ||
| R θJA | 115 | 160.9 | °C/W | ||
| R θJC(top) | Junction-to-case (top) thermal resistance | 52 | 63.4 | 53.9 | °C/W |
| R θJB | Junction-to-board thermal resistance | 66 | 57.1 | 82.9 | °C/W |
| Ψ JT | Junction-to-top characterization parameter | 9.8 | 15.4 | 5.1 | °C/W |
| Ψ JB | Junction-to-board characterization parameter | 64.7 | 56.2 | 80.7 | °C/W |
| R θJC(bot) | Junction-to-case (bottom) thermal resistance | N/A | N/A | N/A | °C/W |
REF5020 Typical Application
Data acquisition systems often require stable voltage references to maintain accuracy. The REF50xx family features low noise, very low drift, and high initial accuracy for high-performance data converters. Figure 9-1 shows the REF5040 in a basic data acquisition system.
REF5020 Package Information
| PART NUMBER | PACKAGE (1) | PACKAGE SIZE (2) |
|---|---|---|
| REF50xxI REF50xxAI | D (SOIC, 8) | 4.90mm × 3.91mm |
| DGK (VSSOP, 8) | 3.00mm × 3.00mm | |
| REF50xxEI | D (SOIC, 8) | 4.90mm × 3.91mm |
- (1) For all available packages, see the orderable addendum at the end of the data sheet.
- (2) The package size (length × width) is a nominal value and includes pins, where applicable.
Copyright © 2016, Texas Instruments Incorporated
Simplified Schematic
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