REF5025-HT Low-Noise, Very-Low-Drift, Precision Voltage Reference

1 Features

Low Temperature Drift: 40 ppm/°C
Low Noise: 3 μV_PP/V
High Output Current: ±7 mA
Low Temperature Drift:
5 ppm/°C (Maximum)
Available in Military (–55°C to +210°C) Temperature Range ⁽¹⁾
Extended Product Life Cycle
Extended Product-Change Notification
Product Traceability

^{Custom temperature ranges available}

1. Custom temperature ranges available

2 Applications

16-Bit Data Acquisition Systems
ATE Equipment
Industrial Process Control
Medical Instrumentation
Optical Control Systems
Precision Instrumentation
Controlled Baseline
One Assembly and Test Site
One Fabrication Site

3 Description

The REF5025-HT is a low-noise, very low-drift, very high precision voltage references. This reference is capable of both sinking and sourcing, and is very robust with regard to line and load changes.

Excellent temperature drift and high accuracy are achieved using proprietary design techniques. These features, combined with very low noise, make the REF5025-HT suitable for use in high-precision data acquisition systems.

The device is offered in HKJ and HKQ packages, as well as Known-Good-Die (KGD) form, and is specified from –55°C to +210°C.

Device Information^(a)

PART NUMBER	PACKAGE	BODY SIZE (NOM)
REF5025-HT	CFP (HKJ)(8)	6.9 mm × 5.65 mm
	CFP (HKQ) (8)	6.9 mm × 5.65 mm
	XCEPT (KGD) (0)	2.04 mm × 1.676 mm

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

Simplified Schematic

4 Revision History

Changes from E Revision (November 2013) to F Revision

Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go
Deleted Ordering Information table, see POA at the end of the data sheetGo

Changes from D Revision (April 2012) to E Revision

Added KGD2 package option Go

5 Pin Configuration and Functions

HKJ Package

8-Pin CFP

Top View

DNC = Do not connect
NC = No internal connection

HKQ Package

8-Pin CFP

Top View

HKQ is a dead bug performed version of HKJ

Pin Functions

PIN		I/O	DESCRIPTION
NAME	NO.	I/O	DESCRIPTION
DNC	1, 8	—	Do not connect
GND	4	Power	System ground
NC	7	—	No internal connection
TEMP	3	O	Temperature monitoring pin provides a temperature-dependent voltage output
TRIM/NR	5	I	Output adjustment and noise reduction input. Connecting 1 μF to this pin creates a low-pass filter at the bandgap and reduce output noise
V_IN	2	Power	Power supply voltage. Range from V_OUT + 0.2 V up to 18 V. TI recommends a bypass capacitor with a value from 1 μF up to 10 μF
V_OUT	6	O	Very accurate, factory-trimmed voltage output. TI recommends a bypass capacitor with a value from 1 μF up to 50 μF with ESR between 1 and 1.5 Ω

Bare Die Information

DIE THICKNESS	BACKSIDE FINISH	BACKSIDE POTENTIAL	BOND PAD METALLIZATION COMPOSITION	BOND PAD THICKNESS
15 mils	Silicon with backgrind	GND	Al-Cu (0.5%)	598 nm

Bond Pad Coordinates in Microns

DESCRIPTION	PAD NUMBER	X MIN	Y MIN	X MAX	Y MAX
NC	1	35.45	46.55	111.45	122.55
NC	2	496.75	56.55	572.75	132.55
VIN	3	607.45	56.55	683.45	132.55
NC	4	637.9	39.4	1013.9	115.4
TEMP	5	1660.1	47.2	1736.1	123.2
GND	6	1770.9	38.85	1847.05	115
GND	7	1877.1	59.6	2016.8	135.6
TRIM/NR	8	1904.65	1553.4	1980.65	1629.4
NC	9	1782.15	1553.4	1858.15	1629.4
VOUT	10	1080.2	1559.85	1219.9	1636
VOUT	11	880.25	1543.55	956.25	1619.55
NC	12	35.45	1553.45	111.45	1629.45

6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)⁽¹⁾

		MIN	MAX	UNIT
Input voltage	V_IN		18	V
Output short-circuit			30	mA
Operating temperature		–55	210	°C
Junction temperature, T_J			210	°C
Storage temperature, T_stg		–65	210	°C

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

6.2 ESD Ratings

			VALUE	UNIT
V_(ESD)	Electrostatic discharge	Human body model (HBM), per ANSI/ESDA/JEDEC JS-001⁽¹⁾	±3000	V
V_(ESD)	Electrostatic discharge	Charged-device model (CDM), per JEDEC specification JESD22-C101⁽²⁾	±1000	V

(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

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

		MIN	MAX	UNIT
V_IN		3.25	18	V
I_OUT		–7	7	mA

6.4 Thermal Information

THERMAL METRIC⁽¹⁾			REF5025-HT	UNIT
			HJK, HKQ (CFP)
			8 PINS
R_θJC	Junction-to-case thermal resistance	To ceramic side of case	5.7	°C/W
R_θJC	Junction-to-case thermal resistance	To top of case lid (metal side of case)	13.7	°C/W

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report (SPRA953).

6.5 Electrical Characteristics

at T_A = 25°C, I_LOAD = 0, C_L = 1 μF, V_IN = 3.25 V to 18 V (unless otherwise noted).

PARAMETER		TEST CONDITIONS	T_A = –55 to +125°C			T_A = 210°C			UNIT
PARAMETER		TEST CONDITIONS	MIN	TYP	MAX	MIN	TYP	MAX	UNIT
OUTPUT VOLTAGE (2.5 V)
V_OUT	Output voltage			2.5			2.5		V
	Initial accuracy⁽¹⁾	V_IN = 3.25 V	0%		0.9%		0.14%
NOISE
	Output voltage noise	f = 0.1 Hz to 10 Hz		7.5					μV_PP
OUTPUT VOLTAGE TEMPERATURE DRIFT
dV_OUT/dT	Output voltage temperature drift⁽²⁾	Calculated from –55°C to +210°C						40	ppm/°C
LINE REGULATION
dV_OUT/dV_IN	Line regulation	From V_IN = 3.25 V to V_IN = 18 V		1	2.2		63	215	ppm/V
LOAD REGULATION
dV_OUT/dI_LOAD	Load regulation	–7 mA < I_LOAD < 10 mA, V_IN = 3.25 V		20	50		20	75	ppm/mA
SHORT-CIRCUIT CURRENT
I_SC	Short-circuit current	V_OUT = 0 V		25			11		mA
TEMP PIN
	Voltage output	At T_A = 25°C		575					mV
Temperature sensitivity⁽³⁾				2.64					mV/°C
TURN-ON SETTLING TIME
	Turn-on settling time	To 0.1% with C_L = 1 μF		200					μs
POWER SUPPLY
V_S	Supply voltage		3.25		18	3.25		18	V
	Quiescent current			0.8	1.2			1.5	mA
TEMPERATURE RANGE
	Specified range	–55°C to +210°C
	Operating range	–55°C to +210°C