X60008E-41

® X60008E-41 Data Sheet June 27, 2006 FN8144.1 Precision 4.096V FGA™ Voltage Reference 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. Features • Output Voltage: 4.096V • Absolute Initial Accuracy: ±5.0mV • 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) Ordering Information PART NUMBER X60008EIS8-41 X60008EIS841T1 PART MARKING X60008E I41 X60008E I41 TEMP. RANGE (°C) PACKAGE PKG. DWG. # Applications • High Resolution A/Ds and D/As • Precision Current Sources • Smart Sensors • Digital Meters -40 to 85 8 Ld SOIC MDP0027 -40 to 85 8 Ld SOIC MDP0027 Tape and Reel -40 to 85 8 Ld SOIC MDP0027 (Pb-free) • Precision Regulators • Strain Gage Bridges • Calibration Systems • Precision Oscillators • Threshold Detectors • V-F Converters • Battery Management Systems • Servo Systems X60008EIS8Z-41 X60008E (Note) ZI41 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 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 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 COMMENT 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. For guaranteed specifications and test conditions, see Electrical Specifications. 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. RECOMMENDED OPERATING CONDITIONS TEMPERATURE Industrial MIN -40°C MAX +85°C Typical Application VIN = +5.0V VIN 0.1µF VOUT X60008-41 GND 10µF 0.001µF(*) 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 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 DESCRIPTION Ground Connection Power Supply Input Connection Voltage Reference Output Connection Do Not Connect; Internal Connection – Must Be Left Floating 2 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. CONDITIONS MIN TYP MAX UNITS PARAMETER VOUT VOA IIN VIN TC VOUT ΔVOUT/ΔVIN ΔVOUT/ΔIOUT ΔVOUT/Δt ΔVOUT/ΔTA ISC VN NOTE: Output Voltage VOUT Accuracy X60008E-41 Supply Current Input Voltage Range Output Voltage Temperature Coefficient(1) Line Regulation Load Regulation Long Term Stability Thermal Hysteresis(2) Short Circuit Current(3) Output Voltage Noise X60008E-41 +4.5V ≤ VIN ≤ +8.0V 0mA ≤ ISOURCE ≤ 10mA -10mA ≤ ISINK ≤ 0mA TA = 25°C ΔT = -40°C to +85°C TA = 25°C 0.1Hz to 10Hz 4.5 TA = 25°C -5.0 4.096 +5.0 500 900 9.0 20 150 10 20 10 100 50 30 80 50 100 V mV nA V ppm/°C µV/V µV/mA ppm/1000Hrs ppm mA µVpp 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) 4.0963 -40°C +25°C VOUT (V) (normailized to 4.096V at VIN = 5.0V) LINE REGULATION 300 250 DELTA VOUT (μV) (normailized to VIN = 5.0V) 4.09625 4.0962 4.09615 4.0961 4.09605 4.096 4.09595 4.0959 4.5 5.5 6.5 VIN (V) 7.5 Unit 2, IIN = 520nA Unit 3, IIN = 700nA 200 150 100 50 0 -50 -100 4.5 +85°C Unit 1, IIN = 360nA 5 5.5 6.0 6.5 VIN (V) 7.0 7.5 8.0 8.5 9.0 8.5 0.1Hz to 10Hz VOUT NOISE 0.6 0.5 0.4 0.3 0.2 0.1 0.0 -0.1 -20 +85°C +25°C 10μV/div LOAD REGULATION Band Pass Filter with 1 zero at .1Hz and 2 poles at 10 Hz DELTA VOUT (mV) -40°C -15 SINKING -10 -5 0 5 10 15 SOURCING 20 1 Sec/div 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) 10mA LOAD TRANSIENT RESPONSE 50μA LOAD TRANSIENT RESPONSE CL = .001μF CL = .001μF 500mV/DIV IL = -10mA IL = +10mA 100mV/DIV IL = -50μA IL = +50μA 2mS/DIV 500μSEC/DIV LINE TRANSIENT RESPONSE LINE TRANSIENT RESPONSE CL = 0 CL = .001μF 200mV/DIV ΔVIN = -500mV ΔVIN = +500mV 200mV/DIV ΔVIN = -500mV ΔVIN = +500mV 500μSEC/DIV 500μSEC/DIV 5 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 VOUT vs TEMPERATURE Normalized to 25°C (3 Representative Units) 0 -10 -20 Unit 3, IIN = 700nA -30 PSRR (dB) No Load 1nF Load 4.0996 4.0984 4.0972 VOUT (V) Unit 2, IIN = 520nA -40 -50 -60 10nF Load 4.096 4.0948 4.0936 4.0924 4.0912 4.09 -40 Unit 1, IIN = 360nA 100nF Load -70 -80 -90 -100 -15 10 35 60 85 1 0 1 100 1000 10000 100000 1000000 TEMPERATURE (°C) FREQUENCY (Hz) ZOUT vs FREQUENCY 350 800 300 no Load 250 ZOUT (Ω) IIN vs VIN 700 600 -40°C 25°C 85°C 1nF Load I IN (nA) 200 10nF Load 150 100 500 400 300 200 50 100nF Load 0 1 10 100 1000 10000 100000 FREQUENCY (Hz) 100 0 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 VIN (V) 1000 900 800 IIN vs VIN (3 Representative Units) TURN-ON TIME 6 VIN VOUT Unit 3 5 Unit 2 600 I IN (nA) VIN & VOUT (V) 700 4 500 400 300 200 100 0 4.5 5 5.5 6 6.5 7 7.5 8 3 Unit 1 2 1 0 8.5 9 -1 1 3 5 7 9 11 VIN (V) TIME (mSec) 6 FN8144.1 June 27, 2006 X60008E-41 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. VIN = 4.5 - 9V VIN FIGURE 1. 10µF 0.01µF VOUT X60008-41 GND 0.001µF 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. 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. 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. 7 FN8144.1 June 27, 2006 X60008E-41 FIGURE 2. 400 350 NOISE VOLTAGE (µVp-p) 300 250 200 150 100 50 0 1 10 100 FIGURE 3. VIN = 5.0V 10µF .1µF VO X60008-41 GND .01µF 10µF 2kΩ VIN 1000 10000 100000 0 -1 1 3 5 7 9 11 FIGURE 4. X60008-41 NOISE REDUCTION CL = 0 CL = .001µF CL = .1µF CL = .01µF & 10µF + 2kΩ X60008 TURN-ON TIME (25°C) (3 Representative Units) 6 5 VIN IIN = 700nA IIN = 520nA 3 2 1 IIN = 360nA VIN & VOUT (V) 4 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 = 25°C) and multiplied by 106 to yield ppm/°C. This is the “Box” method for determining temperature coefficient. 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. 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 GND 4.096V/50mA 0.001µF Kelvin Sensed Load 4.5V to 9V 0.1µF VIN VOUT X60008-41 GND + – VOUT Sense Load 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 SDA SCL VSS RL + – VOUT VOUT (buffered) 9 FN8144.1 June 27, 2006 X60008E-41 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 10 FN8144.1 June 27, 2006