VRE310BS [CIRRUS]

Precision Voltage Reference; 精密电压基准
VRE310BS
元器件型号: VRE310BS
生产厂家: CIRRUS LOGIC    CIRRUS LOGIC
描述和应用:

Precision Voltage Reference
精密电压基准

光电二极管
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型号参数:VRE310BS参数
是否Rohs认证 符合
生命周期Obsolete
包装说明SURFACE MOUNT PACKAGE-8
Reach Compliance Codeunknown
风险等级5.75
模拟集成电路 - 其他类型THREE TERMINAL VOLTAGE REFERENCE
JESD-30 代码R-PDSO-X8
功能数量1
输出次数1
端子数量8
最高工作温度85 °C
最低工作温度-40 °C
标称输出电压10 V
封装主体材料PLASTIC/EPOXY
封装形状RECTANGULAR
封装形式SMALL OUTLINE
认证状态Not Qualified
最大供电电流 (Isup)7 mA
表面贴装YES
最大电压温度系数1 ppm/ °C
温度等级INDUSTRIAL
端子形式UNSPECIFIED
端子位置DUAL
微调/可调输出YES
Base Number Matches1
MAX34334CSE前5页PDF页面详情预览
P r o d u c t I
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VRE310
VRE310
DESCRIPTION
Precision Voltage Reference
FEaTuRES
+10 V Output, ±1.0 mV (.01%)
Temperature Drift: 0.6 ppm/ºC
Low Noise: 6 μV
P-P
(0.1-10Hz)
Industry Standard Pinout: 8-pin DIP or Surface
Mount Package
♦ Excellent Line Regulation: 6 ppm/V Typical
♦ Output Trim Capability
The VRE310 is a low cost, high precision +10 V refer-
ence. Available in an industry standard 8-pin DIP or
SMT, the device is ideal for upgrading systems that
use lower performance references.
The device provides ultrastable +10 V output with ±1.0
mV (.01%) initial accuracy and a temperature coeffi-
cient of 0.6 ppm/ºC. This improvement in accuracy is
made possible by a unique, patented multipoint laser
compensation technique. Significant improvements
have been made in other performance parameters
as well, including initial accuracy, warm-up drift, line
regulation, and long-term stability, making the VRE310
series the most accurate reference available in a stan-
dard 8-pin DIP or SMT package.
For enhanced performance, the VRE310 has an exter-
nal trim option for users who want less than 0.01% ini-
tial error. For ultra low noise applications, an external
capacitor can be attached between the noise reduction
pin and the ground pin. A reference ground pin is pro-
vided to eliminate socket contact resistance errors.
aPPlICaTIONS
The VRE310 is recommended for use as a refer-
ence for 14, 16, or 18-bit D/A converters which re-
quire an external precision reference. The device
is also ideal for calibrating scale factor on high
resolution A/D converters. The VRE310 offers su-
perior performance over monolithic references.
Figure 1. BlOCK DIaGRaM
SElECTION GuIDE
Model
VRE310AS
VRE310AD
VRE310BS
VRE310BD
VRE310CS
VRE310CD
VRE310JS
VRE310JD
Initial Error Temp. Coeff.
(mV)
(ppm/ºC)
1.0
1.0
1.6
1.6
2.0
2.0
1.0
1.0
0.6
0.6
1.0
1.0
2.0
2.0
0.6
0.6
Temp. Range
(ºC)
0ºC to +70ºC
0ºC to +70ºC
0ºC to +70ºC
0ºC to +70ºC
0ºC to +70ºC
0ºC to +70ºC
-40ºC to +85ºC
-40ºC to +85ºC
Package
Options
SMT8 (GD)
DIP8 (KD)
SMT8 (GD)
DIP8 (KD)
SMT8 (GD)
DIP8 (KD)
SMT8 (GD)
DIP8 (KD)
8-pin Surface Mount
8-pin DIP
Package Style GD
Package Style KD
VRE310DS
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
MaR 2009
1
APEX − VRE310DSREVE
VRE310
P r o d u c t I n n o v a t i o nF r o m
1. ChaRaCTERISTICS aND SPECIFICaTIONS
ElECTRICal SPECIFICaTIONS
V
PS
=±15V, T = +25ºC, R
L
= 10KΩ Unless Otherwise Noted.
Model
Parameter
Power Supply
Operating Temperature (A,B,C)
Operating Temperature (J)
Storage Temperature
Short Circuit Protection
OuTPuT VOlTaGE
VRE310
Temp. Sensor Voltage (Note 1)
OuTPuT VOlTaGE ERRORS
Initial Error
Warmup Drift
T
MIN
- T
MAX
Long-Term Stability
Noise (0.1 - 10Hz)
OuTPuT CuRRENT
Range
REGulaTION
Line
Load
OuTPuT aDJuSTMENT
Range
POWER SuPPlY CuRRENT
(Note 5)
VRE310 +PS
5
7
*
*
*
*
mA
20
*
*
mV
6
3
10
*
*
*
*
*
*
ppm/V
ppm/mA
±10
*
mA
(Note 4)
(Note3)
6
6
(Note 2)
1
0.6
*
*
±1.0
2
1.0
*
*
±1.6
3
2.0
±2.0
mV
ppm
ppm/ºC
ppm/1000hrs.
µVpp
+10.0
630
*
*
*
*
V
mV
Min
±13.5
0
-40
-65
Continuous
aBSOluTE MaXIMuM RaTINGS
±15
±22
+70
+85
+150
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
V
ºC
ºC
ºC
a/J
Typ
Max
Min
B
Typ
Max
Min
C
Typ
Max
units
NOTES:
* Same as A/J Models.
1. The temp. reference TC is 2.1 mV/ ºC
2. The specified values are without external trim.
3. The temperature coefficient is determined by the box method using the following formula:
V
MAX
– V
MIN
T.C. =
x 10
6
V
NOMINAL
x (T
MAX
– T
MIN
)
4. The specified values are without the external noise reduction capacitor.
5. The specified values are unloaded.
2
VRE310DS
P r o d u c t I n n o v a t i o nF r o m
VRE310
2. TYPICal PERFORMaNCE CuRVES
V
OUT
vs. TEMPERATURE
V
OUT
vs. TEMPERATURE
Temperature
o
C
VRE310A
V
OUT
vs. TEMPERATURE
Temperature
o
C
VRE310B
V
OUT
vs. TEMPERATURE
Temperature
o
C
VRE310C
QUIESCENT CURRENT VS. TEMP
Temperature
o
C
VRE310J
PSRR VS. FREQUENCY
JUNCTION TEMP. RISE VS. OUTPUT CURRENT
Temperature
o
C
Output Current (mA)
Frequency (Hz)
VRE310DS
3
VRE310
3. ThEORY OF OPERaTION
P r o d u c t I n n o v a t i o nF r o m
The following discussion refers to the block diagram in Figure 1. In operation, approximately 6.3 V is applied to
the noninverting input of the op amp. The voltage is amplified by the op amp to produce a 10 V output. The gain is
determined by the networks R1 and R2: G=1 + R2/R1. The 6.3 V zener diode is used because it is the most stable
diode over time and temperature.
The zener operating current is derived from the regulated output voltage through R3. This feedback arrangement
provides a closely regulated zener current. This current determines the slope of the references’ voltage vs. tempera-
ture 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.
A nonlinear compensation network of thermistors and resistors is used in the VRE series voltage references. This
proprietary network eliminates most of the nonlinearity in the voltage vs. temperature function. By then adjusting the
slope, a very stable voltage is produced 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.
By using highly stable resistors in our network, we produce a voltage reference that also has very good long term
stability.
The proper connection of the VRE310 series voltage references with the optional trim resistor is shown below. The
VRE310 reference has the ground terminal brought out on two pins (pin 4 and pin 7) which are connected together
internally. This allows the user to achieve greater accuracy when using a socket. Voltage references have a volt-
age 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 20 ppm. By connecting pin 4 to the power
supply ground and pin 7 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. Pay careful attention to the circuit layout to avoid noise pickup and voltage drops in the
lines.
EXTERNal CONNECTIONS
+ V
IN
2
V
TEMP OUT
3
6
OPTIONAL
NOISE REDUCTION
CAPACITOR
C
N
1µF
8
+ V
OUT
10k
OPTIONAL
FINE TRIM
ADJUSTMENT
VRE310
5
7
4
REF. GND
PIN CONFIGuRaTION
N/C
+V
IN
TEMP
GND
1
2
3
4
VRE310
TOP
VIEW
8
7
6
5
NOISE
REDUCTION
REF. GND
V
OUT
TRIM

VRE310DS
P r o d u c t I n n o v a t i o nF r o m
VRE310
CONTaCTING CIRRuS lOGIC SuPPORT
For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North America.
For inquiries via email, please contact tucson.support@cirrus.com.
International customers can also request support by contacting their local Cirrus Logic Sales Representative.
To find the one nearest to you, go to www.cirrus.com
IMPORTANT NOTICE
Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject
to change without notice and is provided "AS IS" without warranty of any kind (express or implied). Customers are advised to obtain the latest version of relevant
information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale
supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus
for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third
parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights,
copyrights, trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives con-
sent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This consent
does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROP-
ERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE
SUITABLE FOR USE IN PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DEVICES, LIFE SUPPORT PROD-
UCTS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUS-
TOMER’S RISK AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE
CUSTOMER OR CUSTOMER’S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES,
BY SUCH USE, TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL
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Cirrus Logic, Cirrus, and the Cirrus Logic logo designs, Apex Precision Power, Apex and the Apex Precision Power logo designs are trademarks of Cirrus Logic, Inc.
All other brand and product names in this document may be trademarks or service marks of their respective owners.
VRE310DS

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