INTERSIL X60008E-41

X60008E-41
®
Data Sheet
June 27, 2006
Precision 4.096V FGA™ Voltage
Reference
Features
• Output Voltage: 4.096V
The X60008-41 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 XFET™
technologies.
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 and portable systems operating at
significantly higher accuracy and lower power levels than
can be achieved with conventional technologies.
PART
MARKING
TEMP.
RANGE
(°C)
• Ultra Low Power Supply Current: 500nA
• Low Temperature Coefficient: 20ppm/°C
• 10 mA Source & Sink Current Capability
• 10 ppm/1000hrs Long Term Stability
• Supply Voltage Range: 4.5V to 9.0V
• 5kV ESD (Human Body Model)
• Standard Package: SOIC-8
• Temp Range: -40°C to +85°C
• Pb-free Plus Anneal Available (RoHS Compliant)
• High Resolution A/Ds and D/As
PACKAGE
PKG.
DWG. #
X60008EIS8-41
X60008E
I41
-40 to 85 8 Ld SOIC MDP0027
X60008EIS841T1
X60008E
I41
-40 to 85 8 Ld SOIC MDP0027
Tape and
Reel
X60008EIS8Z-41 X60008E
(Note)
ZI41
• Absolute Initial Accuracy: ±5.0mV
Applications
Ordering Information
PART
NUMBER
FN8144.1
• Precision Current Sources
• Smart Sensors
• Digital Meters
-40 to 85
8 Ld SOIC MDP0027
(Pb-free)
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
1
• Precision Regulators
• Strain Gage Bridges
• Calibration Systems
• Precision Oscillators
• Threshold Detectors
• V-F Converters
• Battery Management Systems
• Servo Systems
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
X60008E-41
ABSOLUTE MAXIMUM RATINGS
COMMENT
Storage Temperature Range . . . . . . . . . . . . . . . . . .-65°C to +125°C
Max Voltage Applied VIN to Gnd . . . . . . . . . . . . . . . . -0.5V to +9.0V
Max Voltage Applied
VOUT to Gnd (*) . . . . . . . . . . . . . . . . . . . . . . . . . . . - 0.5V to +5.1V
Voltage on “DNC” pins . . . . No connections permitted to these pins.
Lead Temperature, soldering (*) . . . . . . . . . . . . . . . . . . . . . +225°C
(*) note: maximum duration = 10 seconds
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.
RECOMMENDED OPERATING CONDITIONS
For guaranteed specifications and test conditions, see
Electrical Specifications.
TEMPERATURE
MIN
MAX
Industrial
-40°C
+85°C
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.
Typical Application
VIN = +5.0V
0.1µF
10µF
VIN
VOUT
X60008-41
0.001µF(*)
GND
REF IN
Serial
Bus
Enable
SCK
SDAT
16 to 24-bit
A/D Converter
* Also see Figure 3 in “Applications Information” on page 7.
Package Diagram
Pin Configurations
X60008-XX
PIN NAME
SOIC
GND
VIN
GND
1
8
DNC
VIN
2
7
DNC
DNC
3
6
VOUT
GND
4
5
DNC
2
DESCRIPTION
Ground Connection
Power Supply Input Connection
VOUT
Voltage Reference Output Connection
DNC
Do Not Connect; Internal Connection – Must Be
Left Floating
FN8144.1
June 27, 2006
X60008E-41
Electrical Specifications
SYMBOL
Operating Conditions: VIN = 5.0V, IOUT = 0mA, COUT = 0.001µF, TA = -40 to +85°C, unless otherwise
specified.
PARAMETER
VOUT
Output Voltage
VOA
VOUT Accuracy X60008E-41
IIN
Supply Current
VIN
Input Voltage Range
TC VOUT
Output Voltage
Temperature Coefficient(1)
ΔVOUT/ΔVIN
CONDITIONS
MIN
TYP
MAX
4.096
TA = 25°C
-5.0
UNITS
V
+5.0
mV
900
nA
9.0
V
X60008E-41
20
ppm/°C
Line Regulation
+4.5V ≤ VIN ≤ +8.0V
150
µV/V
ΔVOUT/ΔIOUT
Load Regulation
0mA ≤ ISOURCE ≤ 10mA
-10mA ≤ ISINK ≤ 0mA
10
20
50
100
µV/mA
ΔVOUT/Δt
Long Term Stability
TA = 25°C
10
ppm/1000Hrs
ΔVOUT/ΔTA
Thermal Hysteresis(2)
ΔT = -40°C to +85°C
100
ppm
ISC
Short Circuit Current(3)
TA = 25°C
50
VN
Output Voltage Noise
0.1Hz to 10Hz
30
500
4.5
80
mA
µVpp
NOTE:
1. Over the specified temperature range. Temperature coefficient is measured by the box method whereby the change in VOUT is divided by the
temperature range; in this case, -40°C to +85°C = 125°C.
2. Thermal Hysteresis is the change in VOUT created by package stress @ TA = 25°C after temperature cycling. VOUT is read initially at TA = 25°C;
the X60008 is then cycled between Hot (85°C) and Cold (-40°C) before a second VOUT measurement is taken at 25°C. The deviation between
the initial VOUT reading and the second VOUT reading is then expressed in ppm.
3. Guaranteed by Device Characterization
3
FN8144.1
June 27, 2006
X60008E-41
Typical Performance Curves (VIN = 5.0V, IOUT = 0mA, TA = 25°C, unless otherwise specified)
LINE REGULATION
(3 Representative Units)
LINE REGULATION
300
4.0963
Unit 2,
IIN = 520nA
DELTA VOUT (μV)
(normailized to VIN = 5.0V)
250
VOUT (V)
(normailized to 4.096V at VIN = 5.0V)
-40°C
+25°C
200
150
+85°C
100
50
0
-50
-100
4.5
5
5.5
6.0
6.5
7.0
7.5
8.0
8.5
4.09625
Unit 3,
IIN = 700nA
4.0962
4.09615
4.0961
Unit 1,
IIN = 360nA
4.09605
4.096
4.09595
4.0959
9.0
4.5
VIN (V)
5.5
6.5
7.5
8.5
VIN (V)
0.1Hz to 10Hz VOUT NOISE
Band Pass Filter with 1 zero at .1Hz and 2 poles at 10 Hz
LOAD REGULATION
0.6
0.4
0.3
+25°C
+85°C
0.2
10μV/div
DELTA VOUT (mV)
0.5
-40°C
0.1
0.0
-0.1
-20
-15
-10
-5
0
5
SINKING
10
15
20
1 Sec/div
SOURCING
OUTPUT CURRENT (mA)
4
FN8144.1
June 27, 2006
X60008E-41
Typical Performance Curves (VIN = 5.0V, IOUT = 0mA, TA = 25°C, unless otherwise specified) (Continued)
50μA LOAD TRANSIENT RESPONSE
10mA LOAD TRANSIENT RESPONSE
CL = .001μF
IL = -10mA
IL = +10mA
100mV/DIV
500mV/DIV
CL = .001μF
IL = -50μA
IL = +50μA
2mS/DIV
500μSEC/DIV
LINE TRANSIENT RESPONSE
LINE TRANSIENT RESPONSE
200mV/DIV
CL = .001μF
200mV/DIV
CL = 0
ΔVIN = -500mV
ΔVIN = +500mV
500μSEC/DIV
5
ΔVIN = -500mV
ΔVIN = +500mV
500μSEC/DIV
FN8144.1
June 27, 2006
X60008E-41
Typical Performance Curves (VIN = 5.0V, IOUT = 0mA, TA = 25°C, unless otherwise specified) (Continued)
PSRR vs CAP Load
0
VOUT vs TEMPERATURE
Normalized to 25°C
(3 Representative Units)
4.0996
1nF Load
-20
4.0984
-30
Unit 3,
IIN = 700nA
PSRR (dB)
Unit 2, IIN = 520nA
4.0972
4.096
VOUT (V)
No Load
-10
Unit 1, IIN = 360nA
4.0948
10nF Load
-40
-50
-60
100nF Load
4.0936
-70
4.0924
-80
4.0912
-90
-100
4.09
-40
-15
10
35
1
85
60
01
100
1000
TEMPERATURE (°C)
10000
100000
1000000
FREQUENCY (Hz)
ZOUT vs FREQUENCY
IIN vs VIN
350
800
300
25°C
600
1nF Load
85°C
500
200
I IN (nA)
ZOUT (Ω)
250
-40°C
700
no Load
10nF Load
150
400
300
100
200
50
100
100nF Load
0
0
1
10
100
1000
10000
4.5
100000
5
5.5
6
IIN vs VIN
(3 Representative Units)
1000
6.5
7
7.5
8
8.5
9
VIN (V)
FREQUENCY (Hz)
900
TURN-ON TIME
6
Unit 3
VIN
5
800
VOUT
VIN & VOUT (V)
700
Unit 2
I IN (nA)
600
500
Unit 1
400
4
3
2
300
200
1
100
0
0
4.5
5
5.5
6
6.5
7
VIN (V)
6
7.5
8
8.5
9
-1
1
3
5
7
9
11
TIME (mSec)
FN8144.1
June 27, 2006
X60008E-41
Applications Information
FIGURE 1.
VIN = 4.5 - 9V
FGA Technology
The X60008 series of voltage references use the floating
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 version of the floating gate
voltage. The resulting reference 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
reference voltages can be programmed (standard voltage
settings are provided, but customer-specific voltages are
available).
The process used for these reference devices is a floating
gate CMOS process, and the amplifier circuitry uses CMOS
transistors for amplifier and output transistor circuitry. While
providing excellent accuracy, there are limitations in output
noise level and load regulation due to the MOS device
characteristics. These limitations are addressed with circuit
techniques discussed in other sections.
Nanopower Operation
Reference devices achieve their highest accuracy when
powered up continuously, and after initial stabilization 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 practical to leave
power-on continuously in battery operated circuits. The
X60008 consumes extremely low supply current 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 reference which essentially presents no load
to the battery.
In particular, battery powered data converter circuits that
would normally require the entire circuit to be disabled when
not in use can remain powered up between conversions as
shown in Figure 1. Data acquisition 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 currents
will need to be disabled in between conversions to conserve
battery capacity. Absolute accuracy will suffer as the device
is biased and requires time to settle to its final value, or, may
not actually settle to a final value as power-on time may be
short.
7
10µF
0.01µF
VIN
VOUT
X60008-41
GND
0.001µF
Serial
Bus
REF IN
Enable
SCK
SDAT
12 to 24-bit
A/D Converter
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.
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 Figure 2. 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 load capacitances above
.001µF the noise reduction network shown in Figure 3 is
recommended. This network reduces noise sig-nificantly
over the full bandwidth. As shown in Figure 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.
FN8144.1
June 27, 2006
X60008E-41
FIGURE 2.
X60008-41 NOISE REDUCTION
400
6
CL = 0
350
CL = .001µF
300
VIN
5
CL = .1µF
CL = .01µF & 10µF + 2kΩ
VIN & VOUT (V)
NOISE VOLTAGE (µVp-p)
FIGURE 4.
X60008 TURN-ON TIME (25°C)
(3 Representative Units)
250
200
150
100
4
IIN = 700nA
IIN = 520nA
3
IIN = 360nA
2
1
50
0
1
10
100
1000
10000
100000
0
-1
1
3
5
7
9
11
TIME (mSec)
FIGURE 3.
Temperature Coefficient
VIN = 5.0V
10µF
.1µF
VIN
VO
X60008-41
GND
2kΩ
.01µF
10µF
Turn-On Time
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 at two
temperatures, take the total variation, (VHIGH - VLOW), and
divide by the temperature extremes of measurement
(THIGH - TLOW). The result is divided by the nominal
reference voltage (at T = 25°C) and multiplied by 106 to yield
ppm/°C. This is the “Box” method for determining
temperature coefficient.
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. Normal turn-on
time is typically 7ms. This is shown in the graph, Figure 4.
Since devices can vary in supply current 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 conversions are started.
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
8
FN8144.1
June 27, 2006
X60008E-41
Typical Application Circuits
Precision 4.096V, 50mA Reference.
VIN = 5.2V to 9V
R = 200Ω
2N2905
VIN
X60008-41
VOUT
4.096V/50mA
0.001µF
GND
Kelvin Sensed Load
4.5V to 9V
0.1µF
VIN
VOUT
+
X60008-41
VOUT Sense
–
Load
GND
4.096V Full Scale Low-Drift 10-bit Adjustable Voltage Source
4.5V to 9V
0.1µF
VIN
VOUT
X60008-41
GND
0.001µF
VCC RH
X9119
2-Wire Bus
9
+
SDA
SCL
VSS
VOUT
–
VOUT
(buffered)
RL
FN8144.1
June 27, 2006
X60008E-41
Small Outline Package Family (SO)
A
D
h X 45°
(N/2)+1
N
A
PIN #1
I.D. MARK
E1
E
c
SEE DETAIL “X”
1
(N/2)
B
L1
0.010 M C A B
e
H
C
A2
GAUGE
PLANE
SEATING
PLANE
A1
0.004 C
0.010 M C A B
L
b
0.010
4° ±4°
DETAIL X
MDP0027
SMALL OUTLINE PACKAGE FAMILY (SO)
SYMBOL
SO-8
SO-14
SO16
(0.150”)
SO16 (0.300”)
(SOL-16)
SO20
(SOL-20)
SO24
(SOL-24)
SO28
(SOL-28)
TOLERANCE
NOTES
A
0.068
0.068
0.068
0.104
0.104
0.104
0.104
MAX
-
A1
0.006
0.006
0.006
0.007
0.007
0.007
0.007
±0.003
-
A2
0.057
0.057
0.057
0.092
0.092
0.092
0.092
±0.002
-
b
0.017
0.017
0.017
0.017
0.017
0.017
0.017
±0.003
-
c
0.009
0.009
0.009
0.011
0.011
0.011
0.011
±0.001
-
D
0.193
0.341
0.390
0.406
0.504
0.606
0.704
±0.004
1, 3
E
0.236
0.236
0.236
0.406
0.406
0.406
0.406
±0.008
-
E1
0.154
0.154
0.154
0.295
0.295
0.295
0.295
±0.004
2, 3
e
0.050
0.050
0.050
0.050
0.050
0.050
0.050
Basic
-
L
0.025
0.025
0.025
0.030
0.030
0.030
0.030
±0.009
-
L1
0.041
0.041
0.041
0.056
0.056
0.056
0.056
Basic
-
h
0.013
0.013
0.013
0.020
0.020
0.020
0.020
Reference
-
16
20
24
28
Reference
N
8
14
16
Rev. L 2/01
NOTES:
1. Plastic or metal protrusions of 0.006” maximum per side are not included.
2. Plastic interlead protrusions of 0.010” maximum per side are not included.
3. Dimensions “D” and “E1” are measured at Datum Plane “H”.
4. Dimensioning and tolerancing per ASME Y14.5M-1994
10
FN8144.1
June 27, 2006