VRE402AS datasheet, PDF - EEWORLD Datasheet

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VRE402AS: DescriptionThree Terminal Voltage Reference, PDSO8, DSO-8; CategoryPower/power management The power supply circuit; File Size416KB，5 Pages; ManufacturerThaler Corp; Environmental Compliance

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VRE402AS Overview

Three Terminal Voltage Reference, PDSO8, DSO-8

VRE402AS Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Maker	Thaler Corp
package instruction	DSO-8
Reach Compliance Code	unknown
Analog Integrated Circuits - Other Types	THREE TERMINAL VOLTAGE REFERENCE
JESD-30 code	R-PDSO-G8
Number of terminals	8
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Certification status	Not Qualified
surface mount	YES
Terminal form	GULL WING
Terminal location	DUAL

VRE402AS Preview

VRE402

Precision

Dual Reference

THALER CORPORATION • 2015 N. FORBES BOULEVARD • TUCSON, AZ. 85745 • (520) 882-4000

FEATURES

PIN CONFIGURATION

• ±2.500 V OUTPUT ± 0.250 mV (.01%)

• TEMPERATURE DRIFT: 0.6 ppm/°C

• LOW NOISE: 1.5

(0.1-10Hz)

• TRACKING ERROR: 0.2 mV max.

• EXCELLENT LINE REGULATION: 6ppm/V Typ.

• SURFACE MOUNT AND DIP PACKAGES

N/C

OUT

N/C

OUT

N/C

VRE402

TOP

VIEW

N/C

REF. GND

GND

FIGURE 1

DESCRIPTION

The VRE402 is a low cost, high precision, ±2.5V

reference. Packaged in 14 pin DIP or SMT

packages, the device is ideal for new designs that

need a high performance reference.

The device provides ultrastable ±2.500V output

with ±0.250 mV (.01%) initial accuracy and a

temperature coefficient of 0.6 ppm/°C.

This

improvement in accuracy is made possible by a

unique, patented multipoint laser compensation

technique developed by Thaler Corporation.

Another key feature of this reference is the 0.3 mV

maximum tracking error between the positive and

negative output voltages over the operating

temperature range. This is extremely important in

high performance systems for reducing overall

system errors.

For designs which use the DIP package in a

socket, there is a reference ground pin to

eliminate reference ground errors.

The VRE402 is recommended for use as a

reference for high precision A/D and D/A

converters which require an external precision

reference. The device is ideal for calibrating

scale factor on high resolution A/D converters.

The VRE402 offers superior performance over

monolithic references.

SELECTION GUIDE

Initial

Error

0.25

0.40

0.50

0.25

0.40

0.50

Model

VRE402A

VRE402B

VRE402C

VRE402J

VRE402K

VRE402L

Temp.

Coeff.

ppm/

°C

0.6

1.0

2.0

0.6

1.0

2.0

Temp.

Range

°C

0°C to +70°C

-40°C to +85°C

For package option add D for DIP or S for Surface

Mount to end of model number.

VRE402DS REV. A MAY 1996

ELECTRICAL SPECIFICATIONS

Vps =

15V, T = 25°C, RL = 10K

Ω

unless otherwise noted.

VRE402

B/K

MAX

MIN

TYP

MAX

MIN

MODEL

PARAMETER

ABSOLUTE RATINGS

MIN

A/J

TYP

C/L

TYP

MAX

UNITS

Power Supply

±13.5

±15

±22

Operating Temp. (

A,B,C

)

+70

Operating Temp. (

J,K,L

)

-40

+85

Storage Temperature

-65

+150

Short Circuit Protection

Continuous

OUTPUT VOLTAGE

VRE402

OUTPUT VOLTAGE ERRORS

Initial Error

(1)

Warmup Drift

min

- T

max

(2)

(3)

Tracking Error

Long-Term Stability

Noise (.1-10Hz)

OUTPUT CURRENT

Range

REGULATION

Line

Load

POWER SUPPLY CURRENTS

+PS

-PS

(4)

°C

±2.5

0.25

0.6

0.2

1.5

0.40

1.0

0.3

0.50

2.0

0.4

ppm

ppm/

°C

ppm/1000hrs

µVpp

±10

ppm/V

ppm/mA

NOTES:

*Same as A/J Models.

4. The specified values are unloaded.

1. The specified values are without external trim.

2. The temperature coefficient (tc) is determined by the

box method using the following formula:

max

- V

min

tc =

nominal

x (T

max

-T

min

)

3. The tracking error is the deviation between the

positive and negative output over the operating temp.

range.

x 10

VRE402DS REV. A MAY 1996

TYPICAL PERFORMANCE CURVES

OUT

vs. TEMPERATURE

OUT

vs. TEMPERATURE

OUT

vs. TEMPERATURE

Temperature

VRE402A

Temperature

VRE402B

OUT

vs. TEMPERATURE

Temperature

VRE402C

OUT

vs. TEMPERATURE

OUT

vs. TEMPERATURE

Temperature

VRE402J

Temperature

VRE402K

POSITIVE OUTPUT (TYP)

Temperature

VRE402L

QUIESCENT CURRENT VS. TEMP

JUNCTION TEMP. RISE VS. OUTPUT CURRENT

PSRR VS. FREQUENCY

Temperature

Output Current (mA)

NEGATIVE OUTPUT (TYP)

Frequency (Hz)

QUIESCENT CURRENT VS. TEMP

JUNCTION TEMP. RISE VS. OUTPUT CURRENT

PSRR VS. FREQUENCY

Temperature

Output Current (mA)

Frequency (Hz)

VRE402DS REV. A MAY 1996

DISCUSSION OF PERFORMANCE

THEORY OF OPERATION

The following discussion refers to the schematic in

figure 2 below. A FET current source is used to bias

a 6.3V zener diode. The zener voltage is divided by

the resistor network R1 and R2. This voltage is then

applied to the noninverting input of the operational

amplifier which amplifies the voltage to produce a

2.500V output. The gain is determined by the

resistor networks R3 and R4: G=1 + R4/R3. The

6.3V zener diode is used because it is the most

stable diode over time and temperature.

The current source provides a closely regulated

zener current, which determines the slope of the

references’ voltage vs. temperature function. By

trimming the zener current a lower drift over

temperature can be achieved. But since the voltage

vs. temperature function is nonlinear this

compensation technique is not well suited for wide

temperature ranges.

Thaler Corporation has developed a nonlinear

compensation network of thermistors and resistors

that is used in the VRE series voltage references.

This proprietary network eliminates most of the

nonlinearity in the voltage vs. temperature function.

By adjusting the slope, Thaler Corporation produces

a very stable voltage over wide temperature ranges.

This network is less than 2% of the overall network

resistance so it has a negligible effect on long term

stability.

The VRE402 reference has it’s ground brought out

on two pins (pin 6 and 7) which are connected

internally. This allows the user to achieve greater

accuracy when using a socket. Voltage references

have a voltage drop across their power supply

ground pin due to quiescent current flowing through

the contact resistance. If the contact resistance was

constant with time and temperature, this voltage

drop could be trimmed out. When the reference is

plugged into a socket, this source of error can be as

high as 20ppm. By connecting pin 7 to the power

supply ground and pin 6 to a high impedance

ground point in the measurement circuit, the error

due to the contact resistance can be eliminated. If

the unit is soldered into place, the contact

resistance is sufficiently small that it does not effect

performance.

VRE402

FIGURE 2

VRE402DS REV. A MAY 1996

MECHANICAL

FIGURE 3

INCHES

DIM

MIN

.114

.098

.047

.103

.009

.054

.690

.666

MAX

.136

.103

.056

.118

.020

.062

.715

.680

MILLIMETER

MIN

2.90

2.48

1.19

2.62

0.22

1.37

17.5

16.9

MAX

3.45

2.62

1.42

3.00

0.51

1.57

18.1

17.2

DIM

INCHES

MIN

.495

.390

.265

.090

.024

.040

MAX

.526

.415

.270

.110

.035

.060

MILLIMETER

MIN

12.5

9.91

6.73

2.29

0.61

1.02

MAX

13.3

10.5

6.86

2.79

.890

1.52

FIGURE 4

INCHES

DIM

MIN

.114

.018

.047

.097

.009

.690

.666

MAX

.136

.027

.056

.103

.020

.715

.680

MILLIMETER

MIN

2.90

.460

1.19

2.46

0.22

17.5

16.9

MAX

3.45

.690

1.42

2.62

0.51

18.1

17.2

DIM

INCHES

MIN

.410

.390

.265

.285

.195

.090

.050

.040

MAX

.435

.415

.270

.315

.225

.110

.070

.060

MILLIMETER

MIN

10.4

9.91

6.73

7.24

4.95

2.29

1.27

1.02

MAX

11.0

10.5

6.86

8.00

5.72

2.79

1.79

1.52

VRE402DS REV. A MAY 1996

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VRE402AS Related Products

	VRE402AS	VRE402AD	VRE402BD	VRE402BS	VRE402JD	VRE402CD
Description	Three Terminal Voltage Reference, PDSO8, DSO-8	Three Terminal Voltage Reference, PDIP8, DIP-8	Three Terminal Voltage Reference, PDIP8, DIP-8	Three Terminal Voltage Reference, PDSO8, DSO-8	Three Terminal Voltage Reference, PDIP8, DIP-8	Three Terminal Voltage Reference, PDIP8, DIP-8
Is it Rohs certified?	conform to	conform to	conform to	conform to	conform to	conform to
Maker	Thaler Corp	Thaler Corp	Thaler Corp	Thaler Corp	Thaler Corp	Thaler Corp
package instruction	DSO-8	DIP-8	DIP, DIP14,.3	DFP, FL14,.4,47	DIP, DIP14,.3	DIP, DIP14,.3
Reach Compliance Code	unknown	unknown	unknown	unknown	unknown	unknow
Analog Integrated Circuits - Other Types	THREE TERMINAL VOLTAGE REFERENCE	THREE TERMINAL VOLTAGE REFERENCE	THREE TERMINAL VOLTAGE REFERENCE	THREE TERMINAL VOLTAGE REFERENCE	THREE TERMINAL VOLTAGE REFERENCE	THREE TERMINAL VOLTAGE REFERENCE
JESD-30 code	R-PDSO-G8	R-PDIP-T8	R-PDIP-T14	R-PDFP-F14	R-PDIP-T14	R-PDIP-T14
Number of terminals	8	8	14	14	14	14
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE	IN-LINE	IN-LINE	FLATPACK	IN-LINE	IN-LINE
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
surface mount	YES	NO	NO	YES	NO	NO
Terminal form	GULL WING	THROUGH-HOLE	THROUGH-HOLE	FLAT	THROUGH-HOLE	THROUGH-HOLE
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
encapsulated code	SOP	-	DIP	DFP	DIP	DIP
length	-	-	17.8 mm	17.8 mm	17.8 mm	17.8 mm
Maximum negative supply voltage (Vsup)	-	-	-22 V	-22 V	-22 V	-22 V
Negative supply voltage minimum (Vsup)	-	-	-13.5 V	-13.5 V	-13.5 V	-13.5 V
Number of functions	-	-	1	1	1	1
Output times	-	-	1	1	1	1
Maximum operating temperature	-	-	70 °C	70 °C	85 °C	70 °C
Maximum output voltage	-	-	2.25025 V	2.25025 V	2.25025 V	2.25025 V
Minimum output voltage	-	-	2.24975 V	2.24975 V	2.24975 V	2.24975 V
Nominal output voltage	-	-	2.5 V	2.5 V	2.5 V	2.5 V
Encapsulate equivalent code	-	-	DIP14,.3	FL14,.4,47	DIP14,.3	DIP14,.3
Maximum seat height	-	-	5.24 mm	4.34 mm	5.24 mm	5.24 mm
Maximum supply voltage (Vsup)	-	-	22 V	22 V	22 V	22 V
Minimum supply voltage (Vsup)	-	-	13.5 V	13.5 V	13.5 V	13.5 V
Nominal supply voltage (Vsup)	-	-	15 V	15 V	15 V	15 V
Maximum voltage temperature coefficient	-	-	1 ppm/°C	1 ppm/°C	0.6 ppm/°C	2 ppm/°C
Temperature level	-	-	COMMERCIAL	COMMERCIAL	INDUSTRIAL	COMMERCIAL
Terminal pitch	-	-	2.54 mm	2.55 mm	2.54 mm	2.54 mm
Fine-tuning/adjustable output	-	-	NO	NO	NO	NO
Maximum voltage tolerance	-	-	0.01%	0.01%	0.01%	0.01%
width	-	-	10.7 mm	12.9 mm	10.7 mm	10.7 mm

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