REF5050AID

Low-Noise, Very Low Drift, Precision Voltage Reference

Manufacturer

Texas Instruments

Overview

Part: REF50xx from Texas Instruments

Type: Low-Noise, Very Low Drift, Precision Voltage Reference

Key Specs:

Low temperature drift: 3 ppm/°C (maximum)
High accuracy: 0.05% (maximum)
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

Features:

Low temperature drift
High accuracy
Low noise
Excellent long-term stability
High-output current
Capable of both sinking and sourcing current
Excellent line and load regulation
Available in high-grade and standard-grade

Applications:

Precision data acquisition systems
Semiconductor test equipment
Industrial process controls
Medical instrumentation
Pressure and temperature transmitters
Lab and field instrumentation

Package:

SOIC (8): 4.90 mm × 3.91 mm
VSSOP (8): 3.00 mm × 3.00 mm

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 μV_PP/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

Precision data acquisition systems
Semiconductor test equipment
Industrial process controls
Medical instrumentation
Pressure and temperature transmitters
Lab and field instrumentation

3 Description

The REF50xx is a family of low-noise, low-drift, very high precision voltage references. These references are capable of both sinking and sourcing current, and have excellent line and load regulation.

Excellent temperature drift (3 ppm/°C) and high accuracy (0.05%) are achieved using proprietary design techniques. These features, combined with very low noise, make the REF50xx family an excellent choice for use in high-precision data acquisition systems.

Each reference voltage is available in both high grade (REF50xxIDGK and REF50xxID) and standard grade (REF50xxAIDGK and REF50xxAID). The reference voltages are offered in 8-pin VSSOP and SOIC packages, and are specified from -40°C to 125°C.

Device Information

PART NUMBER	PACKAGE (1)	BODY SIZE (NOM)
REF50xx	SOIC (8)	4.90 mm × 3.91 mm
REFOUXX	VSSOP (8)	3.00 mm × 3.00 mm

For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

Pin Configuration

NOTES: (1) DNC = Do not connect.

(2) NC = No internal connection.

Figure 6-1. D, DGK Packages 8-Pin SOIC, VSSOP Top View

Table 6-1. Pin Functions

NAME
DNC
VIN
TEMP
GND
TRIM/NR
VOUT
NC
DNC

Electrical Characteristics

At T_A = 25°C, I_LOAD = 0, C_L = 1 μ F, and V_IN = ( V_OUT + 0.2 V) to 18 V, unless otherwise noted

	PARAMETER		TEST CONDITIONS	MIN	TYP	MAX	UNIT
OUTPUT V	OLTAGE
			REF5020 (V _OUT = 2.048 V) ⁽¹⁾ , 2.7 V < V _IN < 18 V		2.048
			REF5025		2.5
/our Output vo			REF5030		3.0
V _OUT	Output voltage		REF5040		4.096		V
			REF5045		4.5
			REF5050		5.0
			REF5010		10.0
	Initial accuracy: high gra	ade	All voltage options ⁽¹⁾	-0.05%		0.05%
	Initial accuracy: standar	d grade	All voltage options ⁽¹⁾	-0.1%		0.1%
NOISE
e _npp	Low Frequency noise		f = 0.1 Hz to 10 Hz		3		μV _PP /V
e _n	Output Voltage Noise		f = 10 Hz to 1 kHz		0.9		μV _RMS /V
	OLTAGE TEMPERATURE I	DRIFT					1 11110
dV _OUT /dT	Output voltage temperat
001	High grade				2.5	3	ppm/°C
	Standard grade				3	8	ppm/°C
LINE REGU							PP, 0
	27111011		V_IN = (V_OUT + 0.2) to 18 V⁽⁴⁾		0.1	1	ppm/V
Δ V_{O(Δ VI)}	Line regulation		V_IN = V_OUT + 0.2 V,				ppпі, ч
O(LIVI)	- O(AVI)		T_A = -40^°C to 125^°C⁽⁴⁾		0.2	1	ppm/V
LOAD REG	ULATION
			-10 mA < I_LOAD < 10 mA, V_IN = V_OUT + 0.75 V⁽⁵⁾		20	30	ppm/mA
Δ V_{O(Δ IL)}	Load regulation		-10 mA < I _LOAD < 10 mA, V _IN = V _OUT + 0.75 V			50	ppm/mA
			T_A = -40^°C to 125^°C⁽⁵⁾
	CUIT CURRENT		1,,
Isc	Short circuit current		V _OUT = 0		25		mA
THERMAL	HYSTERESIS ^{(2) (3)}
	High grade	VSSOP-8	Cycle 1		50		ppm
	Standard grade	VSSOP-8	Cycle 1		70		ppm
	High grade	SOIC-8	Cycle 1		70		ppm
	Standard grade	SOIC-8	Cycle 1		90		ppm
	High grade	VSSOP-8	Cycle 2		40		ppm
	Standard grade	VSSOP-8	Cycle 2		40		ppm
	High grade	SOIC-8	Cycle 2		50		ppm
	Standard grade	SOIC-8	Cycle 2		50		ppm
LONG-TER	M STABILITY ⁽³⁾
		VSSOP-8	0 to 1000 hours		50		ppm/1000 hr
		VSSOP-8	1000 to 2000 hours		25		ppm/1000 hr
		SOIC-8	0 to 1000 hours		22		ppm/1000 hr
		SOIC-8	1000 to 2000 hours		18		ppm/1000 hr
TEMP PIN		1
	Voltage output		At T _A = 25°C		575		mV
	Temperature sensitivity		T _A = -40°C to 125°C		2.64		mV/°C
TURN-ON S	SETTLING TIME						-
	Turn-on settling time		To 0.1% with C _L = 1 μF		200		μs
							F-2

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 (TJ max)		150	°C
Storage temperature, Tstg	–65	150	°C

⁽¹⁾ Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not implied.

Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)

	MIN	NOM MAX	UNIT
VIN	VOUT + 0.2 V(1)	18	V
IOUT	–10	10	mA

⁽¹⁾ Except for the REF5020, where VIN (minimum) = 2.7 V

7.4 Thermal Information

			REF50xx
	THERMAL METRIC(1)	D (SOIC)	DGK (VSSOP)
		8 PINS	8 PINS
RθJA	Junction-to-ambient thermal resistance	115	160.9
RθJC(top)	Junction-to-case (top) thermal resistance	63.4	53.9
RθJB	Junction-to-board thermal resistance	57.1	82.3
ψJT	Junction-to-top characterization parameter	15.4	5.1
ψJB	Junction-to-board characterization parameter	56.2	80.7
RθJC(bot)	Junction-to-case (bottom) thermal resistance	N/A	N/A

7.5 Electrical Characteristics

At T_A = 25°C, I_LOAD = 0, C_L = 1 μ F, and V_IN = ( V_OUT + 0.2 V) to 18 V, unless otherwise noted

	PARAMETER		TEST CONDITIONS	MIN	TYP	MAX	UNIT
OUTPUT V	OLTAGE
			REF5020 (V _OUT = 2.048 V) ⁽¹⁾ , 2.7 V < V _IN < 18 V		2.048
			REF5025		2.5
/our Output vo			REF5030		3.0
V _OUT	Output voltage		REF5040		4.096		V
			REF5045		4.5
			REF5050		5.0
			REF5010		10.0
	Initial accuracy: high gra	ade	All voltage options ⁽¹⁾	-0.05%		0.05%
	Initial accuracy: standar	d grade	All voltage options ⁽¹⁾	-0.1%		0.1%
NOISE
e _npp	Low Frequency noise		f = 0.1 Hz to 10 Hz		3		μV _PP /V
e _n	Output Voltage Noise		f = 10 Hz to 1 kHz		0.9		μV _RMS /V
	OLTAGE TEMPERATURE I	DRIFT					1 11110
dV _OUT /dT	Output voltage temperat
001	High grade				2.5	3	ppm/°C
	Standard grade				3	8	ppm/°C
LINE REGU							PP, 0
	27111011		V_IN = (V_OUT + 0.2) to 18 V⁽⁴⁾		0.1	1	ppm/V
Δ V_{O(Δ VI)}	Line regulation		V_IN = V_OUT + 0.2 V,				ppпі, ч
O(LIVI)	- O(AVI)		T_A = -40^°C to 125^°C⁽⁴⁾		0.2	1	ppm/V
LOAD REG	ULATION
			-10 mA < I_LOAD < 10 mA, V_IN = V_OUT + 0.75 V⁽⁵⁾		20	30	ppm/mA
Δ V_{O(Δ IL)}	Load regulation		-10 mA < I _LOAD < 10 mA, V _IN = V _OUT + 0.75 V			50	ppm/mA
			T_A = -40^°C to 125^°C⁽⁵⁾
	CUIT CURRENT		1,,
Isc	Short circuit current		V _OUT = 0		25		mA
THERMAL	HYSTERESIS ^{(2) (3)}
	High grade	VSSOP-8	Cycle 1		50		ppm
	Standard grade	VSSOP-8	Cycle 1		70		ppm
	High grade	SOIC-8	Cycle 1		70		ppm
	Standard grade	SOIC-8	Cycle 1		90		ppm
	High grade	VSSOP-8	Cycle 2		40		ppm
	Standard grade	VSSOP-8	Cycle 2		40		ppm
	High grade	SOIC-8	Cycle 2		50		ppm
	Standard grade	SOIC-8	Cycle 2		50		ppm
LONG-TER	M STABILITY ⁽³⁾
		VSSOP-8	0 to 1000 hours		50		ppm/1000 hr
		VSSOP-8	1000 to 2000 hours		25		ppm/1000 hr
		SOIC-8	0 to 1000 hours		22		ppm/1000 hr
		SOIC-8	1000 to 2000 hours		18		ppm/1000 hr
TEMP PIN		1
	Voltage output		At T _A = 25°C		575		mV
	Temperature sensitivity		T _A = -40°C to 125°C		2.64		mV/°C
TURN-ON S	SETTLING TIME						-
	Turn-on settling time		To 0.1% with C _L = 1 μF		200		μs
							F-2

Thermal Information

			REF50xx
	THERMAL METRIC(1)	D (SOIC)	DGK (VSSOP)
		8 PINS	8 PINS
RθJA	Junction-to-ambient thermal resistance	115	160.9
RθJC(top)	Junction-to-case (top) thermal resistance	63.4	53.9
RθJB	Junction-to-board thermal resistance	57.1	82.3
ψJT	Junction-to-top characterization parameter	15.4	5.1
ψJB	Junction-to-board characterization parameter	56.2	80.7
RθJC(bot)	Junction-to-case (bottom) thermal resistance	N/A	N/A

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	—
REF5050-EP.HTML	Texas Instruments	—
REF5050AIDR	Texas Instruments	SOIC-8
REF5050ID	Texas Instruments	—
REF5050IDGKR	Texas Instruments	—
REF5050IDGKT	Texas Instruments	—
REF5050IDR	Texas Instruments	—
REF50XX	Texas Instruments	—

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