X60003D-41

® X60003B-41, X60003C-41, X60003D-41 Data Sheet March 15, 2005 FN8138.0 Precision 4.096V SOT-23 FGA™ Voltage References FEATURES • Output Voltage: 4.096V • Absolute Initial Accuracy Options: ±1.0mV, ±2.5mV, & ±5.0mV • Ultra Low Power Supply Current: 500nA • Low Temperature Coefficient Options: 10 & 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: 3-lead SOT-23 • Temp Range: -40°C to +85°C APPLICATIONS • High Resolution A/Ds & D/As • Digital Meters • Calibration Systems • V-F Converters TYPICAL APPLICATION DESCRIPTION The X60003x-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 & 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 = +5.0V 0.1µF VIN VOUT 10µF X60003x-41 GND 0.001µF(*) 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 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005. All Rights Reserved All other trademarks mentioned are the property of their respective owners. X6003B-41, X6003C-41, X6003D-41 PACKAGE DIAGRAM X60003x-41 SOT-23 VIN 1 3 GND VOUT 2 PIN CONFIGURATIONS Pin Name GND VIN VOUT Ground Connection Power Supply Input Connection Voltage Reference Output Connection Description ORDERING INFORMATION X 60003 X I G3 – 41 Logo Device Part Number 60003 = Standard B = ±1.0 mV, 10 ppm/°C C = ±2.5 mV, 20 ppm/°C D = ±5.0 mV, 20 ppm/°C I = -40°C to +85°C G3 = 3 lead SOT-23 41 = 4.096V Grade Temperature Range Package VOUT Option PART MARKING Order Part Number X60003BIG3-41 X60003CIG3-41 X60003DIG3-41 Top Marking AHA AHB AHC 2 FN8138.0 March 15, 2005 X6003B-41, X6003C-41, X6003D-41 ABSOLUTE MAXIMUM RATINGS Storage Temperature Range............ -65°C to + 125°C Max Voltage Applied VIN to Gnd..........................................-0.5V to + 10V Max Voltage Applied VOUT to Gnd(*) ..................................-0.5V to + 5.1V Lead Temperature (soldering, 10 secs).......... + 225°C *Maximum duration = 10 seconds 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. -40°C Max. +85°C ELECTRICAL CHARACTERISTICS (Operating Conditions: VIN = 5.0V, IOUT = 0mA, COUT = 0.001µF, TA = -40 to +85°C unless otherwise specified.) Symbol VOUT VOA Parameter Output Voltage VOUT Accuracy X60003B-41 X60003C-41 X60003D-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 Conditions TA = 25°C Min Typ 4.096 Max Units V mV -1.0 -2.5 -5.0 500 4.5 X60003B-41 X60003C-41 X60003D-41 +4.5V ≤ VIN ≤ +8.0V 0mA ≤ ISOURCE ≤ 10mA -10mA ≤ ISINK ≤ 0mA TA = 25°C ∆T = -40°C to +85°C TA = 25°C 0.1Hz to 10Hz 10 20 10 150 50 30 +1.0 +2.5 +5.0 900 9.0 10 20 20 150 50 100 nA V ppm/°C IIN VIN TC VOUT ∆VOUT/∆VIN ∆VOUT/∆IOUT ∆VOUT/∆t ∆VOUT/∆TA ISC VN Note: µV/V µV/mA ppm/1000Hrs ppm 80 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 X60003x-41 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 and/or correlation to other device tests. 3 FN8138.0 March 15, 2005 X6003B-41, X6003C-41, X6003D-41 TYPICAL PERFORMANCE CHARACTERISTIC CURVES (VIN = 5.0V, IOUT = 0mA, TA = 25°C unless otherwise specified) I IN vs VIN (3 Representitive Units) 800 Unit 3 700 600 IN (nA) IN (nA) Unit 2 500 400 Unit 1 300 200 4.0 5.0 6.0 7.0 VIN (V) 8.0 9.0 -40°C 400 500 +85°C +25°C 550 600 I IN vs VIN 450 350 4.0 5.0 6.0 7.0 VIN (V) 8.0 9.0 4.0975 4.097 4.0965 VOUT (V) 4.096 4.0955 VOUT vs TEMPERATURE Normalized to 25°C (3 Representitive Units) Unit 1 Unit 3 4.095 4.0945 Unit 2 4.094 -40 -15 10 35 60 85 TEMPERATURE (°C) LINE REGULATION (3 Representitive Units) 4.0969 VOUT (V) (normalized to 4.096V at VIN = 5V) 4.0967 Delta VOUT (µV) (normalized to VIN = 5.0V) Unit 2, IIN = 450nA 4.0965 Unit 1, IIN = 340nA 4.0963 4.0961 4.0959 4.0957 4.0955 4.5 Unit 3, IIN = 590nA 350 300 LINE REGULATION -40°C 250 +25°C 200 150 100 50 0 -50 +85°C 5 5.5 6 6.5 7 7.5 8 8.5 9 -100 4.5 5 5.5 6 VIN (V) 6.5 7 VIN (V) 7.5 8 8.5 9 4 FN8138.0 March 15, 2005 X6003B-41, X6003C-41, X6003D-41 TYPICAL PERFORMANCE CHARACTERISTIC CURVES (VIN = 5.0V, IOUT = 0mA, TA = 25°C unless otherwise specified) LINE TRANSIENT RESPONSE CL = 0nF LINE TRANSIENT RESPONSE CL = 1nF 200mV/DIV ∆VIN = -500mV ∆VIN = 500mV 200mV/DIV ∆VIN = -500mV 500µsec/DIV ∆VIN = 500mV 500µsec/DIV PSRR vs CAP LOAD 0 -10 -20 Delta VOUT (mV) -30 PSRR (dB) -40 -50 -60 -70 -80 -90 -100 1 10 100 1000 10000 100000 1000000 FREQUENCY (Hz) -0.30 -20 -15 -10 100nF Load 10nF Load 1nF Load No Load LOAD REGULATION 0.30 +85°C 0.20 -40°C 0.10 0.00 -0.10 -0.20 +25°C -5 0 5 10 OUTPUT CURRENT (mA) 15 20 SINKING SOURCING LOAD TRANSIENT RESPONSE CL = 1nF LOAD TRANSIENT RESPONSE CL = 1nF IL = -50µA IL = 50µA 200mV/DIV 50mV/DIV IL = -10mA IL = 10mA 100µsec/DIV 500µsec/DIV 5 FN8138.0 March 15, 2005 X6003B-41, X6003C-41, X6003D-41 TYPICAL PERFORMANCE CHARACTERISTIC CURVES (VIN = 5.0V, IOUT = 0mA, TA = 25°C unless otherwise specified) Z OUT vs FREQUENCY 6 5 VIN & VOUT (V) 4 3 2 1 0 -1 1 3 5 7 TIME (mSec) 9 11 0 1 10 100 1000 10000 100000 FREQUENCY (Hz) VIN IIN = 450nA ZOUT (Ω) 100 200 TURN-ON TIME (25°C) 1nF Load no Load 10nF Load 150 50 100nF Load 0.1Hz to 10Hz VOUT NOISE Band Pass Filter with 1 Zero at 0.1Hz and 2 Poles at 10Hz 10µV/DIV 10 sec/DIV 6 FN8138.0 March 15, 2005 X6003B-41, X6003C-41, X6003D-41 APPLICATIONS INFORMATION FGA Technology The X60003x-41 voltage reference uses 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. The X60003x-41 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 X60003x-41 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 = 4.5V - 9V 10µF VIN 0.01µF VOUT X60003x-41 GND 0.001µF REF IN Serial Bus 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 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 50µVpp 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 7 FN8138.0 March 15, 2005 X6003B-41, X6003C-41, X6003D-41 load capacitances above .001µF 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 40µVp-p from 1Hz to 1MHz using this network with a .01µF capacitor and a 2kΩ resistor in series with a 10µF capacitor. Figure 2. X60003x-41 NOISE REDUCTION 400 350 NOISE VOLTAGE (µVp-p) 300 250 VIN & VOUT (V) CL = 0 CL = .001µF CL = .1µF CL = .01µF & 10µF + 2kΩ Turn-On Time The X60003x-41 device has 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. Figure 4. X60003 TURN-ON TIME (25°C) 7 6 5 4 3 2 1 IIN = 340nA IIN = 450nA VIN IIN = 590nA 200 150 100 50 0 1 10 100 1000 10000 100000 0 -1 1 3 5 7 TIME (mSec) 9 11 Figure 3. VIN = 5.0V 10µF .1µF VO X60003x-41 GND .01µF 10µF VIN 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. 2kΩ 8 FN8138.0 March 15, 2005 X6003B-41, X6003C-41, X6003D-41 TYPICAL APPLICATION CIRCUITS Precision 4.096V, 50mA Reference. 4.5V to 9V R = 200Ω 2N2905 VIN X60003x-41 VOUT GND 4.096V/50mA 0.001µF ±4.096V Dual Output, High Accuracy Reference 4.5V to 9V 0.1µF VIN X60003x-41 VOUT GND 0.001µF 4.096V VIN X60003x-41 VOUT GND VIN = -4.5V to -9.0V R1 0.001µF R1 = 4.096V - | VIN | ; IOUT ≤ 10mA -(IOUT) -4.096V Kelvin Sensed Load 4.5V to 9V 0.1µF VIN VOUT X60003x-41 GND + – Load VOUT Sense 9 FN8138.0 March 15, 2005 X6003B-41, X6003C-41, X6003D-41 TYPICAL APPLICATION CIRCUITS Negative Voltage Reference X60003x-41 VIN VOUT GND CIN 0.001 COUT = 0.001µF -4.096V R1 = 1250Ω VIN = -9V R1 Limits max load current with RI = 1250Ω, ILOAD MAX = 4mA R1 = 4.096V - | VIN | -(IOUT) 4.096V Full Scale Low-Drift 10-bit Adjustable Voltage Source 4.5V to 9V 0.1µF VIN VOUT X60003x-41 GND 0.001µF VCC RH X9119 2-Wire Bus SDA SCL VSS RL + – VOUT (buffered) VOUT 10 FN8138.0 March 15, 2005 X6003B-41, X6003C-41, X6003D-41 PACKAGING INFORMATION 3-Lead Plastic, SOT-23, Package Code G3 0.007 (0.20) B 0.0003 (0.08) 0.046 (1.18) BSC 0.055 (1.40) 0.047 (1.20) 0.093 (2.35) BSC B C L 4X 0.35 H A-B D 0.35 C A-B D 2X N/2 TIPS 1 0.075 (1.90) BSC 2 0.120 (3.04) 0.110 (2.80) 0.034 (0.88) 0.047 (1.02) 0.038 (0.95) BSC Parting Line Seating Plane 0.0004 (0.01) 0.0040 (0.10) 0.035 (0.89) 0.044 (1.12) NOTES: 1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 2. PACKAGE DIMENSIONS EXCLUDE MOLDING FLASH 3. DIE AND DIE PADDLE IS FACING DOWN TOWARDS SEATING PLANE 4. THIS PART IS COMPLIANT WITH JEDEC SPECIFICATION TO-236AB 5. DIMENSIONING AND TOLERANCES PER ASME, Y14.5M-1994 0 - 8°C 0.10 R MIN. 0.20 in 12° REF. TYP. 0.10 R MIN. SEATING PLANE .024 (0.60) .016 (0.40) 0.575 REF. 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 11 FN8138.0 March 15, 2005