VRE304-7 Cirrus Logic Inc, VRE304-7 Datasheet

Ref +4.5V, 0.7ppm, 0/70C

VRE304-7

Manufacturer Part Number
VRE304-7
Description
Ref +4.5V, 0.7ppm, 0/70C
Manufacturer
Cirrus Logic Inc
Datasheet

Specifications of VRE304-7

Product
Voltage References
Topology
Series References
Reference Type
Fixed/Precision
Output Voltage
4.5 V
Initial Accuracy
+/- 0.45 mV
Average Temperature Coefficient (typ)
0.6 PPM/C
Series Vref - Input Voltage (max)
+/- 22 V
Series Vref - Input Voltage (min)
+/- 13.5 V
Maximum Operating Temperature
+ 70 C
Package / Case
SMT-8
Input Voltage
+/- 13.5 V to +/- 22 V
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Series Vref - Supply Current (max)
7 mA
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
FEaTuRES
♦ +4.5 V Output, ± 0.450 mV (.01%)
♦ Temperature Drift: 0.6 ppm/ºC
♦ Low Noise: 3μV
♦ Industry Standard Pinout: 8-Pin Surface Mount
♦ Excellent Line Regulation: 6 ppm/V Typical
♦ Output Trim Capability
aPPlICaTIONS
The VRE304 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 VRE304 offers su-
perior performance over monolithic references.
VRE304DS
SElECTION GuIDE
VRE304A
VRE304C
Package
http://www.cirrus.com
Model
P r o d u c t I n n o v a t i o n F r o m
P r o d u c t I n n o v a t i o n F r o m
Initial Error
p-p
±0.45
±0.90
(mV)
(0.1-10Hz)
Precision Voltage Reference
Temp. Coeff.
(ppm/ºC)
Figure . BlOCK DIaGRaM
0.6
2.0
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
Temp. Range
0ºC to +70ºC
0ºC to +70ºC
(ºC)
DESCRIPTION
The VRE304 is a low cost, high precision +4.5 V refer-
ence. Available in an industry standard 8-pin surface
mount package, the device is ideal for upgrading sys-
tems that use lower performance references.
The device provides ultrastable +4.5 V output with
±0.45 mV (.01%) initial accuracy and a temperature
coefficient of 0.6 ppm/°C. This improvement in accu-
racy is made possible by a unique, patented multipoint
laser compensation technique. Significant improve-
ments have been made in other performance param-
eters as well, including initial accuracy, warm-up drift,
line regulation, and long-term stability.
For enhanced performance, the VRE304 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.
8-pin Surface Mount
Package Style GD
APEX − VRE304DSREVE
VRE304
VRE304
MaR 2009


Related parts for VRE304-7

VRE304-7 Summary of contents

Page 1

... DESCRIPTION The VRE304 is a low cost, high precision +4.5 V refer- ence. Available in an industry standard 8-pin surface mount package, the device is ideal for upgrading sys- tems that use lower performance references. The device provides ultrastable +4.5 V output with ±0.45 mV (.01%) initial accuracy and a temperature coefficient of 0.6 ppm/° ...

Page 2

... OuTPuT CuRRENT Range REGulaTION Line Load OuTPuT aDJuSTMENT Range POWER SuPPlY CuRRENT (Note 5) VRE304 +PS NOTES: * Same as A Model. 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 – V MAX T ...

Page 3

... This network is less than 2% of the overall network resistance so it has a negligible effect on long term stability. VRE304DS vs. TEMPERATURE VRE304A JUNCTION TEMP. RISE VS. OUTPUT CURRENT Output Current (mA) vs. TEMPERATURE OUT Temperature o C VRE304C PSRR VS. FREQUENCY Frequency (Hz) VRE304 3 ...

Page 4

... VRE304 The proper connection of the VRE304 series voltage references with the optional trim resistor for initial error and the optional capacitor for noise reduction is shown below. The VRE304 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 ...

Related keywords