REF50XX
Precision Voltage ReferenceThe REF50XX is a precision voltage reference from Texas Instruments. View the full REF50XX datasheet below including electrical characteristics, absolute maximum ratings.
Manufacturer
Texas Instruments
Category
Voltage ReferencesOverview
Part: REF5010, REF5020, REF5025, REF5030, REF5040, REF5045, REF5050 — Texas Instruments
Type: Low-Noise, Very Low Drift, Precision Voltage Reference
Description: A family of low-noise, low-drift, very high precision voltage references capable of both sinking and sourcing current, featuring excellent temperature drift (3 ppm/°C) and high accuracy (0.05%).
Operating Conditions:
- Supply voltage: V_OUT + 0.2 V to 18 V
- Operating temperature: -40°C to 125°C
- Output current: -10 mA to 10 mA
Absolute Maximum Ratings:
- Max supply voltage: 18 V
- Max continuous current: 30 mA (output short circuit)
- Max junction/storage temperature: 150 °C
Key Specs:
- Initial accuracy (high-grade): ±0.05%
- Low frequency noise (0.1 Hz to 10 Hz): 3 μV PP /V
- Output voltage temperature drift (high-grade): 3 ppm/°C (maximum)
- Line regulation (V_IN = (V_OUT + 0.2) to 18 V): 1 ppm/V (maximum)
- Load regulation (-10 mA < I_LOAD < 10 mA): 30 ppm/mA (maximum)
- Short circuit current (V_OUT = 0): 25 mA (typical)
- Long-term stability (0 to 1000 hours, SOIC-8): 22 ppm/1000 hr (typical)
- Turn-on settling time (to 0.1% with C_L = 1 μF): 200 μs (typical)
Features:
- Low temperature drift: 3 ppm/°C (maximum, high-grade)
- High accuracy: 0.05% (maximum, high-grade)
- Low noise: 3 μVPP/V
- Excellent long-term stability: 22 ppm after first 1000 hours (SOIC-8)
- High-output current: ±10 mA
- Temperature range: -40°C to 125°C
Applications:
- Precision data acquisition systems
- Semiconductor test equipment
- Industrial process controls
- Medical instrumentation
- Pressure and temperature transmitters
- Lab and field instrumentation
Package:
- SOIC (8)
- VSSOP (8)
Features
- Low temperature drift:
- -High-grade: 3 ppm/°C (maximum)
- -Standard-grade: 8 ppm/°C (maximum)
- High accuracy:
- -High-grade: 0.05% (maximum)
- -Standard-grade: 0.1% (maximum)
- Low noise: 3 μVPP/V
- Excellent long-term stability:
- -22 ppm after first 1000 hours (SOIC-8)
- -50 ppm after first 1000 hours (VSSOP-8)
- High-output current: ±10 mA
- Temperature range: -40°C to 125°C
Applications
Pin Configuration
NOTES: (1) DNC = Do not connect.
(2) NC = No internal connection.
Electrical Characteristics
At TA = 25°C, I LOAD = 0, C L = 1 μF, and V IN = (V OUT + 0.2 V) to 18 V, unless otherwise noted
| PARAMETER | PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|---|
| OUTPUT VOLTAGE | OUTPUT VOLTAGE | OUTPUT VOLTAGE REF5020 (V OUT = 2.048 V) (1) , 2.7 V < V IN < 18 V REF5025 REF5030 | 2.048 2.5 3.0 | |||
| V OUT Output voltage | V OUT Output voltage | REF5040 REF5045 REF5050 REF5010 | 4.096 4.5 5.0 10.0 | V | ||
| Initial accuracy: high | Initial accuracy: high | All voltage options (1) | -0.05% | 0.05% | ||
| Initial accuracy: standard | Initial accuracy: standard | All voltage options (1) | -0.1% | 0.1% | ||
| NOISE | NOISE | NOISE | ||||
| e npp Low Frequency noise | e npp Low Frequency noise | f = 0.1 Hz to 10 Hz | 3 | μV PP /V | ||
| Output Voltage Noise | Output Voltage Noise | f = 10 Hz to 1 kHz | 0.9 | μV RMS /V | ||
| OUTPUT VOLTAGE TEMPERATURE DRIFT | OUTPUT VOLTAGE TEMPERATURE DRIFT | OUTPUT VOLTAGE TEMPERATURE DRIFT | OUTPUT VOLTAGE TEMPERATURE DRIFT | |||
| dV OUT /dT Output voltage temperature | dV OUT /dT Output voltage temperature | dV OUT /dT Output voltage temperature | ||||
| High grade | High grade | High grade | 2.5 | 3 | ppm/°C | |
| Standard grade | Standard grade | Standard grade | 3 | 8 | ppm/°C | |
| LINE REGULATION | LINE REGULATION | LINE REGULATION | LINE REGULATION | LINE REGULATION | ||
| V IN = (V OUT + 0.2) to 18 V (4) | 0.1 | 1 | ppm/V | |||
| Line regulation | Line regulation | V IN = V OUT + 0.2 V, T A = -40°C to 125°C (4) | 0.2 | 1 | ppm/V | |
| LOAD REGULATION | LOAD REGULATION | LOAD REGULATION | LOAD REGULATION | LOAD REGULATION | ||
| -10 mA < I LOAD < 10 mA, V IN = V OUT + 0.75 V (5) | 20 | 30 | ppm/mA | |||
| ΔV O(ΔIL) Load regulation | ΔV O(ΔIL) Load regulation | -10 mA < I LOAD < 10 mA, V IN = V OUT + 0.75 V T = -40°C to 125°C (5) | 50 | ppm/mA | ||
| SHORT-CIRCUIT CURRENT | SHORT-CIRCUIT CURRENT | SHORT-CIRCUIT CURRENT | SHORT-CIRCUIT CURRENT | |||
| I SC Short circuit current | I SC Short circuit current | V OUT = 0 | 25 | mA | ||
| THERMAL HYSTERESIS (2) (3) | THERMAL HYSTERESIS (2) (3) | THERMAL HYSTERESIS (2) (3) | ||||
| High grade | High grade | Cycle 1 | 50 | ppm | ||
| Standard grade | Standard grade | Cycle 1 | 70 | ppm | ||
| High grade | High grade | Cycle 1 | 70 | ppm | ||
| Standard | Standard | Cycle 1 | 90 | ppm | ||
| High grade | High grade | Cycle 2 | 40 | ppm | ||
| Standard | Standard | Cycle 2 | 40 | ppm | ||
| High grade | High grade | Cycle 2 | 50 | ppm | ||
| Standard grade | Standard grade | Cycle 2 | 50 | ppm | ||
| LONG-TERM STABILITY (3) | LONG-TERM STABILITY (3) | LONG-TERM STABILITY (3) 0 to 1000 hours 1000 to 2000 hours 0 to 1000 hours 1000 to 2000 hours | LONG-TERM STABILITY (3) | LONG-TERM STABILITY (3) 50 25 22 18 | ppm/1000 hr ppm/1000 hr ppm/1000 hr ppm/1000 hr | |
| TEMP PIN | TEMP PIN | TEMP PIN | TEMP PIN | |||
| Voltage output | Voltage output | At T A = 25°C | 575 | mV | ||
| Temperature sensitivity | Temperature sensitivity | T A = -40°C to 125°C | 2.64 | mV/°C | ||
| TURN-ON SETTLING TIME | TURN-ON SETTLING TIME | TURN-ON SETTLING TIME | TURN-ON SETTLING TIME | |||
| Turn-on settling time | To 0.1% with C L = 1 μF | 200 | μs |
SBOS410K - JUNE 2007 - REVISED JUNE 2023
Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
| MIN | MAX | UNIT | |
|---|---|---|---|
| Input voltage | -0.2 | 18 | V |
| Output short circuit | -30 | 30 | mA |
| Operating temperature | -55 | 125 | °C |
| Junction temperature (T J max) | 150 | °C | |
| Storage temperature, T stg | -65 | 150 | °C |
Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| MIN | NOM | MAX | UNIT | |
|---|---|---|---|---|
| V IN | V OUT + 0.2 V (1) | 18 | V | |
| I OUT | -10 | 10 | mA |
Thermal Information
| REF50xx | REF50xx | ||
|---|---|---|---|
| THERMAL METRIC | (1) | D (SOIC) | DGK (VSSOP) |
| 8 PINS | 8 PINS | ||
| R θJA | Junction-to-ambient thermal resistance | 115 | 160.9 |
| R θJC(top) | Junction-to-case (top) thermal resistance | 63.4 | 53.9 |
| R θJB | Junction-to-board thermal resistance | 57.1 | 82.3 |
| ψ JT | Junction-to-top characterization parameter | 15.4 | 5.1 |
| ψ JB | Junction-to-board characterization parameter | 56.2 | 80.7 |
| R θJC(bot) | Junction-to-case (bottom) thermal resistance | N/A | N/A |
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 10-1 shows the REF5040 in a basic data acquisition system.
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| REF5010 | Texas Instruments | — |
| REF5020 | Texas Instruments | — |
| REF5025 | Texas Instruments | — |
| REF5030 | Texas Instruments | — |
| REF5040 | Texas Instruments | — |
| REF5045 | Texas Instruments | — |
| REF5050 | Texas Instruments | — |
| REF5050-EP | Texas Instruments | — |
| REF5050AID | Texas Instruments | — |
| REF5050AIDR | Texas Instruments | SOIC-8 |
| REF5050ID | Texas Instruments | — |
| REF5050IDGKR | Texas Instruments | — |
| REF5050IDGKT | Texas Instruments | — |
| REF5050IDR | Texas Instruments | — |
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