X60008C-25 [INTERSIL]
Precision 2.5V FGA Voltage Reference; 精密2.5V FGA基准电压源
| 型号： | X60008C-25 |
| 厂家： | 
Intersil |
| 描述： | Precision 2.5V FGA Voltage Reference |
| 文件： | 总10页 (文件大小：302K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
X60008B-25, X60008C-25, X60008D-25
®
Data Sheet
March 15, 2005
FN8140.0
DESCRIPTION
Precision 2.5V FGA™ Voltage Reference
The X60008-25 FGA™ voltage references are very
high precision analog voltage references fabricated in
Intersil’s proprietary Floating Gate Analog technology,
which achieves superior levels of performance when
compared to conventional band gap, buried zener, or
FEATURES
• Output Voltage: 2.500V
• Absolute Initial Accuracy Options:
±0.5mV & ±1.0mV
X
™ technologies.
FET
• Ultra Low Power Supply Current: 500nA
FGA™ voltage references feature very high initial
accuracy, very low temperature coefficient, excellent
long term stability, low noise and excellent line and
load regulation, at the lowest power consumption
currently available. These voltage references enable
advanced applications for precision industrial &
portable systems operating at significantly higher
accuracy and lower power levels than can be achieved
with conventional technologies.
• Low Temperature Coefficient options:
3, 5 & 10ppm/°C
• 10 mA Source & Sink Current Capability
• 10 ppm/1000hrs Long Term Stability
• Supply Voltage Range: 4.5V to 6.5V
• 5kV ESD (Human Body Model)
• Standard Package: SOIC-8
• Temp Range: -40°C to +85°C
APPLICATIONS
• High Resolution A/Ds & D/As
• Digital Meters
• Precision Current Sources
• Precision Regulators
• Smart sensors
• Strain Gage Bridges
• Threshold Detectors
• Servo Systems
• Calibration Systems
• V-F Converters
• Precision Oscillators
• Battery Management Systems
TYPICAL APPLICATION
V
= +5.0V
IN
0.1µF
10µF
V
IN
V
OUT
( )
0.001µF *
X60008-25
GND
REF IN
Enable
SCK
SDAT
Serial
Bus
16 to 24-bit
A/D Converter
(*)Also see Figure 3 in Applications Information
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
1
All other trademarks mentioned are the property of their respective owners.
X60008B-25
PACKAGE DIAGRAM
X60008-XX
SOIC
8
7
6
1
2
3
GND
DNC
DNC
V
IN
DNC
GND
V
OUT
5
4
DNC
PIN CONFIGURATIONS
Pin Name
Description
GND
Ground Connection
Power Supply Input Connection
Voltage Reference Output Connection
Do Not Connect; Internal Connection – Must Be Left Floating
V
IN
V
OUT
DNC
ORDERING INFORMATION
X 60008 C I S8 – 25
Logo
Device Part Number
Grade
60008 = Standard
B = ±0.5 mV, 3 ppm/°C
C = ±0.5 mV, 5 ppm/°C
D = ±1.0 mV, 10 ppm/°C
Temperature Range
Package
I = -40°C to +85°C
S8 = 8 lead SOIC
25 = 2.500V
V
Option
OUT
FN8140.0
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March 15, 2005
X60008B-25
ABSOLUTE MAXIMUM RATINGS
COMMENT
Storage Temperature Range..................-65°C to +125°C
Absolute Maximum Ratings are limits which may result
in impaired reliability and/or permanent damage to the
device. These are stress ratings provided for informa-
tion only and functional operation of the device at
these or any other conditions beyond those indicated
in the operational sections of this specification are not
implied.
Max Voltage Applied V to Gnd ...............-0.5V to +6.5V
IN
OUT
(*)
Max Voltage Applied V
to Gnd ........-0.5V to +3.5V
Voltage on “DNC” pins......... No connections permitted to
these pins.
(*)
Lead Temperature, soldering ...........................+ 225°C
(*) note: maximum duration = 10 seconds
For guaranteed specifications and test conditions, see
Electrical Characteristics.
RECOMMENDED OPERATING CONDITIONS
Temperature
Min.
Max.
The guaranteed specifications apply only for the test
conditions listed. Some performance characteristics
may degrade when the device is not operated under
the listed test conditions.
Industrial
-40°C
+85°C
ELECTRICAL CHARACTERISTICS
(Operating Conditions: V = 5.0V, I
= 0mA, C
= 0.001µF, T = -40 to +85°C unless otherwise specified.)
OUT A
IN OUT
Symbol
Parameter
Output Voltage
Accuracy
Conditions
Min
Typ
Max
Units
V
V
V
2.500
OUT
V
T = 25°C
A
mV
OA
OUT
X60008B-25
X60008C-25
X60008D-25
-0.50
-0.50
-1.00
+0.50
+0.50
+1.00
I
Supply Current
500
800
6.5
nA
V
IN
V
Input Voltage Range
4.5
IN
TC V
OUT
Output Voltage
Temperature Coefficient
X60008B-25
X60008C-25
X60008D-25
3
5
10
ppm/°C
(1)
∆V
∆V
/∆V
IN
Line Regulation
Load Regulation
+4.5V ≤ V ≤ +6.5V
IN
100
µV/V
µV/mA
OUT
/∆I
0mA ≤ I
≤ 10mA
10
20
40
80
OUT OUT
SOURCE
-10mA ≤ I ≤≤ 0mA
SINK
T = 25°C
∆V
∆V
/∆t
Long Term Stability
10
ppm/
1000Hrs
OUT
A
(2)
/∆T
Thermal Hysteresis
∆T = -40°C to +85°C
T = 25°C
A
50
50
30
ppm
mA
OUT
A
(3)
I
Short Circuit Current
80
SC
V
Output Voltage Noise
0.1Hz to 10Hz
µV
pp
N
Note: 1. Over the specified temperature range. Temperature coefficient is measured by the box method whereby the change in V
by the temperature range; in this case, -40°C to +85°C = 125°C.
is divided
OUT
2. Thermal Hysteresis is the change in V
created by package stress @ T = 25°C after temperature cycling. V
is read initially at
OUT
= 25°C; the X60008 is then cycled between Hot (85°C) and Cold (-40°C) before a second V
A OUT
T
measurement is taken at 25°C. The
A
OUT
reading is then expressed in ppm.
deviation between the initial V
reading and the second V
OUT
OUT
3. Guaranteed by device characterization and/or correlation to other device tests.
FN8140.0
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March 15, 2005
X60008B-25
TYPICAL PERFORMANCE CHARACTERISTIC CURVES
(V = 5.0V, I
= 0mA, T = 25°C unless otherwise specified)
IN
OUT
A
LINE REGULATION
LINE REGULATION
310nA
80
60
2.50008
2.50006
2.50004
2.50002
2.5
520nA
690nA
40
20
0
-20
-40
-60
-80
-40°C
+25°C
+85°C
2.49998
2.49996
2.49994
-100
4.5
5
5.5
6
6.5
4.5
5
5.5
(V)
6
6.5
V
V
(V)
IN
IN
0.1Hz to 10Hz V
OUT
Band Pass Filter with 1 zero at .1Hz and 2 poles at 10 Hz
NOISE
LOAD REGULATION
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
-0.1
-0.2
+25°C
-40°C
+85°C
-0.3
-20
-15
-10
-5
0
5
10
15
20
1 Sec/div
SINKING
SOURCING
I
(mA)
OUT
V vs TEMPERATURE
OUT
Normalized to 25°C
PSRR vs CAP Load
2.502
2.501
2.5
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
No Load
1nF Load
520nA
690nA
10nF
Load
320nA
100nF Load
2.499
2.498
-40
1
10
100
1000
10000
100000 1000000
-15
10
35
60
85
FREQUENCY (Hz)
TEMPERATURE (°C)
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March 15, 2005
4
X60008B-25
TYPICAL PERFORMANCE CHARACTERISTIC CURVES
(V = 5.0V, I = 0mA, T = 25°C unless otherwise specified)
IN
OUT
A
50µA LOAD TRANSIENT RESPONSE
10mA LOAD TRANSIENT RESPONSE
C = .001µF
L
= -10mA
∆I
IN
∆I = +10mA
IN
1mS/DIV
500µSEC/DIV
LINE TRANSIENT RESPONSE
LINE TRANSIENT RESPONSE
500µSEC/DIV
500µSEC/DIV
FN8140.0
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March 15, 2005
X60008B-25
TYPICAL PERFORMANCE CHARACTERISTIC CURVES
(V = 5.0V, I
= 0mA, T = 25°C unless otherwise specified)
IN
OUT
A
Z
vs FREQUENCY
OUT
I
vs V
IN
IN
300
250
200
150
100
50
600
580
560
540
520
500
480
no Load
1nF Load
-40°C
+25°C
+85°C
10nF Load
100nF Load
0
4.5
5
5.5
6
6.5
100
10
100
1000
10000
100000
V
IN
(V)
FREQUENCY (Hz)
I
vs V
IN
IN
TURN-ON TIME
800
6
5
4
3
2
1
0
3 units representative of I Range
IN
700
600
500
400
300
200
100
0
V
IN
V
OUT
-1
1
3
5
7
9
11
4.5
5
5.5
(V)
6
6.5
TIME (mSec)
V
IN
FN8140.0
March 15, 2005
6
X60008B-25
APPLICATIONS INFORMATION
FGA Technology
suffer as the device is biased and requires time to set-
tle to its final value, or, may not actually settle to a final
value as power-on time may be short.
The X60008 series of voltage references use the float-
ing gate technology to create references with very low
drift and supply current. Essentially the charge stored
on a floating gate cell is set precisely in manufacturing.
The reference voltage output itself is a buffered ver-
sion of the floating gate voltage. The resulting refer-
ence device has excellent characteristics which are
unique in the industry: very low temperature drift, high
initial accuracy, and almost zero supply current. Also,
the reference voltage itself is not limited by voltage
bandgaps or zener settings, so a wide range of refer-
ence voltages can be programmed (standard voltage
settings are provided, but customer-specific voltages
are available).
Figure 1.
V
= 4.5V to 6.5V
IN
10µF
0.01µF
V
IN
V
OUT
X60008-25
GND
0.001µF
REF IN
Enable
SCK
SDAT
12 to 24-bit
A/D Converter
Serial
Bus
The process used for these reference devices is a
floating gate CMOS process, and the amplifier circuitry
uses CMOS transistors for amplifier and output tran-
sistor circuitry. While providing excellent accuracy,
there are limitations in output noise level and load reg-
ulation due to the MOS device characteristics. These
limitations are addressed with circuit techniques dis-
cussed in other sections.
Board mounting Considerations
For applications requiring the highest accuracy, board
mounting location should be reviewed. Placing the
device in areas subject to slight twisting can cause
degradation of the accuracy of the reference voltage
due to die stresses. It is normally best to place the
device near the edge of a board, or the shortest side,
as the axis of bending is most limited at that location.
Obviously mounting the device on flexprint or
extremely thin PC material will likewise cause loss of
reference accuracy.
Nanopower Operation
Reference devices achieve their highest accuracy
when powered up continuously, and after initial stabili-
zation has taken place. This drift can be eliminated by
leaving the power-on continuously.
The X60008 is the first high precision voltage reference
with ultra low power consumption that makes it possible
to leave power-on continuously in battery operated cir-
cuits. The X60008 consumes extremely low supply cur-
rent due to the proprietary FGA technology. Supply
current at room temperature is typically 500nA which is
1 to 2 orders of magnitude lower than competitive
devices. Application circuits using battery power will
benefit greatly from having an accurate, stable refer-
ence which essentially presents no load to the battery.
Noise Performance and Reduction:
The output noise voltage in a 0.1Hz to 10Hz
bandwidth is typically 30µVp-p. This is shown in the
plot in the Typical Performance Curves. The noise
measurement is made with a bandpass filter made of
a 1 pole high-pass filter with a corner frequency at
.1Hz and a 2-pole low-pass filter with a corner
frequency at 12.6Hz to create a filter with a 9.9Hz
bandwidth. Noise in the 10KHz to 1MHz bandwidth is
approximately 400µVp-p with no capacitance on the
output, as shown in Fig. 2 below. These noise
measurements are made with a 2 decade bandpass
filter made of a 1 pole high-pass filter with a corner
frequency at 1/10 of the center frequency and 1-pole
low-pass filter with a corner frequency at 10 times the
center frequency. Figure 2 also shows the noise in the
10KHz to 1MHz band can be reduced to about 50µVp-
p using a .001µF capacitor on the output. Noise in the
1KHz to 100KHz band can be further reduced using a
0.1µF capacitor on the output, but noise in the 1Hz to
100Hz band increases due to instability of the very low
power amplifier with a 0.1µF capacitance load. For
In particular, battery powered data converter circuits
that would normally require the entire circuit to be dis-
abled when not in use can remain powered up
between conversions as shown in figure 1. Data acqui-
sition circuits providing 12 to 24 bits of accuracy can
operate with the reference device continuously biased
with no power penalty, providing the highest accuracy
and lowest possible long term drift.
Other reference devices consuming higher supply cur-
rents will need to be disabled in between conversions
to conserve battery capacity. Absolute accuracy will
FN8140.0
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March 15, 2005
X60008B-25
load capacitances above .001µF the noise reduction
Turn-On Time
network shown in fig. 3 is recommended. This network
reduces noise sig-nificantly over the full bandwidth. As
shown in fig. 2, noise is reduced to less than 40µVp-p
from 1Hz to 1MHz using this network with a .01µF
capacitor and a 2kΩ resistor in series with a 10µF
capacitor.
The X60008 devices have ultra-low supply current and
thus the time to bias up internal circuitry to final values
will be longer than with higher power references. Nor-
mal turn-on time is typically 7ms. This is shown in the
graph, Figure 4. Since devices can vary in supply cur-
rent down to 300nA, turn-on time can last up to about
12ms. Care should be taken in system design to
include this delay before measurements or conver-
sions are started.
Figure 2.
X60008-25 NOISE REDUCTION
400
Figure 4.
CL = 0
350
CL = .001µF
CL = .1µF
300
X60008 TURN-ON TIME (25°C)
CL = .01µF & 10µF + 2kΩ
6
250
V
IN
5
4
3
2
1
0
200
150
100
690 nA
V
OUT
50
0
1
10
100
1000
10000
100000
520 nA
320 nA
Figure 3.
V
= 6.5V
-1
1
3
5
7
9
IN
TIME (mSec)
V
10µF
IN
V
O
.1µF
X60008-25
Temperature Coefficient
GND
2kΩ
The limits stated for temperature coefficient (tempco)
are governed by the method of measurement. The
overwhelming standard for specifying the temperature
drift of a reference is to measure the reference voltage
.01µF
10µF
at two temperatures, take the total variation, (V
-
HIGH
V
), and divide by the temperature extremes of
LOW
measurement (T
- T ). The result is divided by
LOW
HIGH
the nominal reference voltage (at T = 25°C) and multi-
6
plied by 10 to yield ppm/°C. This is the “Box” method.
FN8140.0
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March 15, 2005
X60008B-25
TYPICAL APPLICATION CIRCUITS
Precision 2.5V, 50mA Reference.
V
= 5.2V to 6.5V
IN
R = 200
Ω
2N2905
V
IN
X60008-25
V
2.5V/50mA
0.009µF
OUT
GND
Kelvin Sensed Load
5.0V
0.1µF
V
IN
V
OUT
+
–
V
Sense
OUT
X60008-25
GND
Load
2.5V Full Scale Low-Drift 10-bit Adjustable Voltage Source
4.5V to 6.5V
0.1µF
V
IN
V
OUT
X60008-25
GND
0.01µF
V
R
CC
V
H
OUT
X9119
SDA
SCL
+
–
2-Wire Bus
V
OUT
(buffered)
V
R
L
SS
FN8140.0
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March 15, 2005
X60008B-25
PACKAGING INFORMATION
8-Lead Plastic, SOIC, Package Code S8
0.150 (3.80) 0.228 (5.80)
0.158 (4.00) 0.244 (6.20)
Pin 1 Index
Pin 1
0.014 (0.35)
0.019 (0.49)
0.188 (4.78)
0.197 (5.00)
(4X) 7°
0.053 (1.35)
0.069 (1.75)
0.004 (0.19)
0.010 (0.25)
0.050 (1.27)
0.010 (0.25)
0.050" Typical
X 45°
0.020 (0.50)
0.050"
Typical
0° - 8°
0.0075 (0.19)
0.010 (0.25)
0.250"
0.016 (0.410)
0.037 (0.937)
0.030"
Typical
8 Places
FOOTPRINT
NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS)
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and
reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result
from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
FN8140.0
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March 15, 2005
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