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(R)
X60008C-50, X60008D-50
Data Sheet June 2, 2006 FN8143.1
Precision 5.0V FGATM Voltage Reference
FEATURES * Output Voltage: 5.000V * Absolute Initial Accuracy Options: 0.5mV & 1.0mV * Ultra Low Power Supply Current: 500nA * Low Temperature Coefficient options: 5 & 10ppm/C * 10 mA Source & Sink Current Capability * 10 ppm/1000hrs Long Term Stability * Very Low Dropout Voltage: 100mV @ no load * Supply Voltage Range: 5.1V to 9.0V * 5kV ESD (Human Body Model) * Standard Package: 8 Ld SOIC * Temp Range: -40C to +85C * Pb-Free Plus Anneal Available (RoHS Compliant) APPLICATIONS * High Resolution A/Ds & D/As * Digital Meters * Calibration Systems * V-F Converters TYPICAL APPLICATION
DESCRIPTION The X60008-50 FGATM 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 XFETTM technologies. FGATM 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.
* Precision Current Sources * Precision Regulators * Precision Oscillators * Battery Management Systems
* Smart sensors * Strain Gage Bridges * Threshold Detectors * Servo Systems
VIN = +6.5V VIN
0.1F VOUT X60008-50 GND
10F
0.001F(*)
REF IN Serial Bus Enable SCK SDAT 16 to 24-bit A/D Converter
(*)Also
see Figure 3 in Applications Information
1
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. 2005, 2006. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
X60008C-50, X60008D-50
PACKAGE DIAGRAM
X60008-XX SOIC GND VIN DNC GND 1 2 3 4 8 7 6 5 DNC DNC VOUT DNC
PIN CONFIGURATIONS Pin Name
GND VIN VOUT DNC Ground Connection Power Supply Input Connection Voltage Reference Output Connection Do Not Connect; Internal Connection - Must Be Left Floating
Description
Ordering Information
PART NUMBER X60008CIS8-50* X60008CIS8Z-50* (Note) X60008DIS8-50* X60008DIS8Z-50* (Note) PART MARKING X60008C I X60008C ZI50 X60008D I X60008D ZI50 VOUT OPTION (V) 5.000 5.000 5.000 5.000 GRADE 0.5mV, 5ppm/C 0.5mV, 5ppm/C 1.0mV, 10ppm/C 1.0mV, 10ppm/C TEMP. RANGE (C) -40 to 85 -40 to 85 -40 to 85 -40 to 85 PACKAGE 8 Ld SOIC (150 mil) 8 Ld SOIC (150 mil) (Pb-free) 8 Ld SOIC (150 mil) 8 Ld SOIC (150 mil) (Pb-free) PKG. DWG. # MDP0027 MDP0027 MDP0027 MDP0027
*Add "T1" suffix for tape and reel. 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.
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ABSOLUTE MAXIMUM RATINGS Storage Temperature Range............ -65C to + 125C Voltage on any Pin Referenced to Gnd.............................-0.5V to + 10V Voltage on "DNC" pins.........No connections permitted to these pins. Lead Temperature (soldering, 10s) ................ + 225C RECOMMENDED OPERATING CONDITIONS Temperature
Industrial
COMMENT Absolute Maximum Ratings indicate limits beyond which permanent damage to the device and impaired reliability may occur. These are stress ratings provided for information 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. For guaranteed specifications and test conditions, see Electrical Characteristics. 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.
Min.
-40C
Max.
+85C
ELECTRICAL CHARACTERISTICS (Operating Conditions: VIN = 6.5V, IOUT = 0mA, COUT = 0.001F, TA = -40 to +85C unless otherwise specified.) Symbol
VOUT VOA
Parameter
Output Voltage VOUT Accuracy X60008CIS8-50 X60008DIS8-50 Supply Current Input Voltage Range Output Voltage Temperature Coefficient(1) Line Regulation Load Regulation Long Term Stability Thermal Hysteresis(2) Dropout Voltage(3) Current(4) Short Circuit
Conditions
TA = 25C
Min
Typ
5.000
Max
Units
V mV
-0.50 -1.00 500 5.1
+0.50 +1.00 800 9.0 5 10 100 15 25 10 50 150 50 30 300 80 50 100 nA V ppm/C V/V V/mA ppm/ 1000Hrs ppm mV mA Vpp
IIN VIN TC VOUT VOUT/VIN VOUT/IOUT VOUT/t VOUT/TA VDO ISC VN
X60008CIS8-50 X60008DIS8-50 +5.5V VIN +8.0V 0mA ISOURCE 10mA -10mA ISINK 0mA TA = 25C T = -40C to +85C IOUT = 5mA, VOUT = -0.01% TA = 25C 0.1Hz to 10Hz
Output Voltage Noise
Notes: 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, -40C to +85C = 125C. 2. Thermal Hysteresis is the change in VOUT created by package stress @ TA = 25C after temperature cycling. VOUT is read initially at TA = 25C; the X60008 is then cycled between Hot (85C) and Cold (-40C) before a second VOUT measurement is taken at 25C. The deviation between the initial VOUT reading and the second VOUT reading is then expressed in ppm. 3. Dropout voltage (VDO) is the minimum voltage (VIN) into the X60008 which will produce the output voltage (VOUT) drop specified in the Electrical Characteristics table. 4. Guaranteed by Device Characterization
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TYPICAL PERFORMANCE CHARACTERISTIC CURVES (VIN = 6.5V, IOUT = 0mA, TA = 25C unless otherwise specified)
LINE REGULATION VOUT (V) (normalized to 5V at VIN = 6.5V)
350 5.0004 5.0003 5.0002 5.0001 5.0000 4.9999 4.9998 4.9997 5 6 7 8 9
LINE REGULATION
5 Typical Units
Delta Vo (V) (normalized to VIN = 6.5V)
300 250 200 150 100 50 0 -50 5 6 7 8
25C
-40C
85C
9
Vin (V)
Vin (V)
LOAD REGULATION
0.6 0.5
-40C
Delta VOUT (mV)
0.4 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -20 -15
85C
25C
-10
-5
0
5
10
15
20
SINKING
SOURCING
OUTPUT CURRENT (mA)
0.1Hz to 10Hz VOUT NOISE
Band Pass Filter with 1 zero at .1Hz and 2 poles at 10 Hz
5V/div
10 Sec/div
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TYPICAL PERFORMANCE CHARACTERISTIC CURVES (VIN = 6.5V, IOUT = 0mA, TA = 25C unless otherwise specified)
VOUT vs TEMPERATURE
5.0020 5.0015 5.0010
Normalized to 25C
4 Typical Units
0 -10 -20
PSRR vs CAP LOAD
CL = 0 CL = .001F
PSRR (dB)
VOUT (V)
5.0005 5.0000 4.9995 4.9990 4.9985 4.9980 -40C -15C 10C +35C +60C +85C
-30 -40 -50 -60 -70 -80 1 Hz 10 Hz 100Hz 1kHz 10kHz 100kHz 1 MHz
CL = .01F
CL = .1F
TEMPERATURE (C)
FREQUENCY (Hz)
10mA LOAD TRANSIENT RESPONSE
CL = .001F
10mA LOAD TRANSIENT RESPONSE
CL = .01F
200mV/DIV
200mV/DIV
IIN = -10mA IIN = +10mA
IIN = -10mA IIN = +10mA
500SEC/DIV
500SEC/DIV
10mA LOAD TRANSIENT RESPONSE
CL = .1F
200mV/DIV
IIN = -10mA IIN = +10mA
500SEC/DIV
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TYPICAL PERFORMANCE CHARACTERISTIC CURVES (VIN = 6.5V, IOUT = 0mA, TA = 25C unless otherwise specified)
50A LOAD TRANSIENT RESPONSE
CL = .001F
50A LOAD TRANSIENT RESPONSE
CL = .01F
50mV/DIV
IIN = -50A IIN = +50A
50mV/DIV
IIN = -50A IIN = +50A
100SEC/DIV 50A LOAD TRANSIENT RESPONSE
CL = .1F IIN = -50A
200SEC/DIV
20mV/DIV
IIN = +50A
1mSEC/DIV
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TYPICAL PERFORMANCE CHARACTERISTIC CURVES (VIN = 6.5V, IOUT = 0mA, TA = 25C unless otherwise specified)
LINE TRANSIENT RESPONSE
CL = 0
LINE TRANSIENT RESPONSE
CL = .001F
200mV/DIV
VIN = -500mV
VIN = +500mV
200mV/DIV
VIN = -500mV
VIN = +500mV
500SEC/DIV
500SEC/DIV
LINE TRANSIENT RESPONSE
CL = .01F
LINE TRANSIENT RESPONSE
CL = .1F
200mV/DIV
200mV/DIV
VIN = -500mV
VIN = +500mV
VIN = -500mV
VIN = +500mV
500SEC/DIV
500SEC/DIV
MINIMUM VIN to VOUT DIFFERENTIAL vs. OUTPUT CURRENT
0.50
500.0
+85C
Zout vs FREQUENCY
CL=.001F CL=.01F
VIN to VOUT Differential (V)
0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0 0 -2 -4 -6 -8
400.0
+25C
-40C
Zout ()
300.0
200.0
CL=.1F
100.0
-10
0.0
1
10
100
1K
10K
100K
OUTPUT CURRENT (mA)
FREQUENCY (Hz)
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TYPICAL PERFORMANCE CHARACTERISTIC CURVES (VIN = 6.5V, IOUT = 0mA, TA = 25C unless otherwise specified)
IIN vs VIN IIN vs VIN
-40C +25C +85C
900 800 700 600
700 600 500
IIN (nA)
IIN (nA)
5 units representative of IIN range
500 400 300 200 100 0
400 300 200 100
5.5
6
6.5
7
7.5
8
8.5
9
0
5.5
6
6.5
7
7.5
8
8.5
9
VIN (V)
VIN (V)
TURN-ON TIME
7 6
VIN
VIN & VOUT (V)
5 4 3 2 1 0 0 2 4 6 8 10
VOUT
TIME (mSec)
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APPLICATIONS INFORMATION 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. For example, power-up drift on a high accuracy reference can reach 20ppm or more in the first 30 seconds, and generally will settle to a stable value in 100 hours or so. 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 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. Figure 1.
VIN = +6-9V VIN 10F 0.01F
VOUT X60008-50 GND 0.001F-0.01F REF IN Enable SCK SDAT 12 to 24-bit A/D Converter
Serial Bus
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 30Vp-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 400Vp-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 50Vpp using a .001F capacitor on the output. Noise in the 1KHz to 100KHz band can be further reduced using a
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FN8143.1 June 2, 2006
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0.1F capacitor on the output, but noise in the 1Hz to 100Hz band increases due to instability of the very low power amplifier with a 0.1F capacitance load. For load capacitances above .001F the noise reduction 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 40Vp-p from 1Hz to 1MHz using this network with a .01F capacitor and a 2k resistor in series with a 10F capacitor. Figure 2.
400 350 NOISE VOLTAGE (Vp-p) 300 250 200 150 100 50 0 1 10 100 1000 10000 100000
Figure 4.
X60008-50 TURN-ON TIME (25C)
7 6 VIN & VOUT (V) 5 4 3
IIN = 320nA IIN = 730nA IIN = 500nA
2 1 0 -1 1 3 5 7 9 11 13 15
X60008-50 NOISE REDUCTION
CL = 0 CL = .001F CL = .1F CL = .01F & 10F + 2k
TIME (mSec)
Temperature Coefficient 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 = 25C) and multiplied by 106 to yield ppm/C. This is the "Box" method for temperature coefficient which allows comparison of devices but can mislead a designer concerned about specific ranges of temperature (i.e., 35C to 65C for a power supply design). The designer may infer the tempco to be a well-behaved flat line slope, similar to that shown in Figure 5. The slope of the Vout vs. temperature curve at points in-between the extremes can actually be much higher than the tempco stated in the specifications due to multiple inflections in the temperature drift curve. Most notably, bandgap devices may have some type of "s-curve" which will have slopes that exceed the average specified tempco by 2x or 3x.
Figure 3.
VIN = 6.5V 10F .1F VO X60008-50 GND .01F 10F 2k VIN
Turn-On Time 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.
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Figure 5. Flat Line Slope Tempco Curves (Vout = 5V)
Tempco (Normalized to +25C) 4000V
10ppm/C
Change in VOUT
2000V 0V -2000V -4000V
1ppm/C 3ppm/C 5ppm/C 10ppm/C
5ppm/C 3ppm/C 1ppm/C
The tempco curve for the X60008 devices is generally flat (within 0.5ppm/C typically) over the industrial temperature range (-40 to 85C) with some inflection at the extreme temperatures. The combination of very low tempco performance a predictable tempco slope is unique to the X60008 due to its floating gate technology. This behavior is much easier to consider when designing data conversion systems or control systems that must operate over a range of temperatures.
-40C
25C Temperature
85C
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TYPICAL APPLICATION CIRCUITS
Precision 5V, 50mA Reference.
VIN = 6V-9V R = 200 2N2905 VIN X60008-50 VOUT GND 5.0V/50mA 0.009F
5.0V Dual Output, High Accuracy Reference
+5.3-9.0V
0.1F VIN X60008-50 VOUT GND 0.001F
5.0V
VIN X60008-50 VOUT GND -VIN = -5.5V to -9.0V R1 0.001F -5.0V R1 = 5.0V - VIN ; IOUT 10mA IOUT
Kelvin Sensed Load
+5.3-9.0V 0.1F VIN VOUT X60008-50 GND + - VOUT Sense Load
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TYPICAL APPLICATION CIRCUITS
Negative Voltage Reference
X60008-50 R VIN VOUT GND CIN 0.001 COUT = 0.001F -5.0V R1 = 200 -9V R1 Limits max load current with RI = 200; ILOAD MAX = 4mA
5V Full Scale Low-Drift 10-bit Adjustable Voltage Source
5.3-9.0V
0.1F VIN VOUT X60008-50 GND
0.01F VCC RH X9119 2-Wire Bus SDA SCL VSS RL + - VOUT
VOUT (buffered)
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FN8143.1 June 2, 2006
X60008C-50, X60008D-50 Small Outline Package Family (SO)
A D N (N/2)+1 h X 45
A E E1 PIN #1 I.D. MARK c SEE DETAIL "X"
1 B
(N/2) L1
0.010 M C A B e C H A2 GAUGE PLANE A1 0.004 C 0.010 M C A B b DETAIL X
SEATING PLANE L 4 4
0.010
MDP0027
SMALL OUTLINE PACKAGE FAMILY (SO) SYMBOL A A1 A2 b c D E E1 e L L1 h N 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 SO-8 0.068 0.006 0.057 0.017 0.009 0.193 0.236 0.154 0.050 0.025 0.041 0.013 8 SO-14 0.068 0.006 0.057 0.017 0.009 0.341 0.236 0.154 0.050 0.025 0.041 0.013 14 SO16 (0.150") 0.068 0.006 0.057 0.017 0.009 0.390 0.236 0.154 0.050 0.025 0.041 0.013 16 SO16 (0.300") (SOL-16) 0.104 0.007 0.092 0.017 0.011 0.406 0.406 0.295 0.050 0.030 0.056 0.020 16 SO20 (SOL-20) 0.104 0.007 0.092 0.017 0.011 0.504 0.406 0.295 0.050 0.030 0.056 0.020 20 SO24 (SOL-24) 0.104 0.007 0.092 0.017 0.011 0.606 0.406 0.295 0.050 0.030 0.056 0.020 24 SO28 (SOL-28) 0.104 0.007 0.092 0.017 0.011 0.704 0.406 0.295 0.050 0.030 0.056 0.020 28 TOLERANCE MAX 0.003 0.002 0.003 0.001 0.004 0.008 0.004 Basic 0.009 Basic Reference Reference NOTES 1, 3 2, 3 Rev. L 2/01
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 14
FN8143.1 June 2, 2006

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