Precision 2 g Dual Axis, PWM Output Accelerometer ADXL212 FEATURES GENERAL DESCRIPTION Dual axis accelerometer on a single IC chip 5 mm x 5 mm x 2 mm LCC package 5 mg resolution at 60 Hz Low power: 700 A at VS = 5 V (typical) High zero g bias stability High sensitivity accuracy Pulse width modulated digital outputs X- and Y-axis aligned to within 0.1 (typical) Bandwidth adjustment with a single capacitor Single-supply operation 3500 g shock survival The ADXL212 is a high precision, low power, complete dual axis accelerometer with signal conditioned, duty cycle modulated outputs, all on a single monolithic IC. The ADXL212 measures acceleration with a full-scale range of 2 g (typical). The ADXL212 measures both dynamic acceleration (such as vibration) and static acceleration (such as gravity). The outputs are digital signals whose duty cycles (ratio of pulse width to period) are proportional to acceleration (12.5%/g) in each of the two sensitive axes. The duty cycle outputs can be directly measured by a microcontroller without an analog-todigital converter (ADC) or glue logic. The output period is adjustable from 0.5 ms to 10 ms via a single resistor (RSET). APPLICATIONS The typical noise floor is 500 g/Hz, allowing signals below 5 mg (0.3 of inclination) to be resolved in tilt sensing applications using narrow bandwidths (<60 Hz). Automotive tilt alarms Vehicle dynamic control (VDC)/electronic stability program (ESP) systems Electronic chassis control Electronic braking Data projectors Navigation Platform stabilization/leveling Alarms and motion detectors High accuracy, 2-axis tilt sensing The user selects the bandwidth of the accelerometer using Capacitors CX and CY at the XFILT and YFILT pins. Bandwidths of 0.5 Hz to 500 Hz can be selected to suit the application. The ADXL212 is available in a 5 mm x 5 mm x 2 mm, 8-lead hermetic LCC package. FUNCTIONAL BLOCK DIAGRAM +VS CY YFILT VS ADXL212 CDC AC AMP OUTPUT AMP DEMOD YOUT DCM OUTPUT AMP 32k SENSOR COM 32k ST XOUT T2 XFILT CX RSET PWM OUTPUT WAVEFORM SAMPLE t2 A(g) = (t1/t2 - 0.5)/12.5% 0g = 50% DUTY CYCLE t2(sec) = RSET /125M 09804-001 t1 Figure 1. Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 (c)2011 Analog Devices, Inc. All rights reserved. ADXL212 TABLE OF CONTENTS Features .............................................................................................. 1 Applications Information .............................................................. 10 Applications....................................................................................... 1 Power Supply Decoupling ......................................................... 10 General Description ......................................................................... 1 Setting the Bandwidth Using CX and CY ................................. 10 Functional Block Diagram .............................................................. 1 Self Test ........................................................................................ 10 Revision History ............................................................................... 2 Design Trade-Offs for Selecting Filter Characteristics: Noise vs. Bandwidth ............................................................................. 10 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 Thermal Resistance ...................................................................... 4 ESD Caution.................................................................................. 4 Pin Configuration and Function Descriptions............................. 5 Typical Performance Characteristics ............................................. 6 Using the ADXL212 with Operating Voltages Other Than 5 V ....................................................................................................... 11 Using the ADXL212 as a Dual Axis Tilt Sensor..................... 11 Outline Dimensions ....................................................................... 12 Ordering Guide .......................................................................... 12 Theory of Operation ........................................................................ 9 Performance .................................................................................. 9 REVISION HISTORY 5/11--Revision 0: Initial Version Rev. 0 | Page 2 of 12 ADXL212 SPECIFICATIONS TA = -40C to +85C, VS = 5 V, CX = CY = 0.1 F, acceleration = 0 g, unless otherwise noted. All minimum and maximum specifications are guaranteed. Typical specifications are not guaranteed. Table 1. Parameter SENSOR INPUT Measurement Range 1 Nonlinearity Package Alignment Error Alignment Error Cross Axis Sensitivity SENSITIVITY (RATIOMETRIC) 2 Sensitivity at XOUT, YOUT Sensitivity Change Due to Temperature 3 ZERO g BIAS LEVEL (RATIOMETRIC) 0 g Duty Cycle at XOUT, YOUT Initial 0 g Output Deviation from Ideal 0 g Duty Cycle vs. Supply 0 g Offset vs. Temperature NOISE PERFORMANCE Noise Density FREQUENCY RESPONSE 4 3 dB Bandwidth 5 CX, CY Range5 Sensor Resonant Frequency SELF TEST 6 Duty Cycle Change DUTY CYCLE OUTPUT STAGE fSET 7 fSET7 Tolerance Voltage Levels High Low t2 Drift vs. Temperature Rise/Fall Time POWER SUPPLY Operating Voltage Range Specified Performance Quiescent Supply Current Turn-On Time 8 TEMPERATURE RANGE Specified Performance Test Conditions/Comments Each axis Min Typ 1.5 2 0.2 1 0.01 2 10 12.5 0.5 15 %/g % 25 50 2 1.0 2 75 % % %/V mg/C 500 1000 g/Hz rms 4.7 5.5 Hz F kHz 10 % Best fit straight line X sensor to Y sensor Each axis VS = 5 V VS = 5 V Each axis TA = 25C TA = 25C Max g % of FS Degrees Degrees % 4.0 500 0.002 Self test (ST) pin: pulled low (0) to high (1) RSET = 125 k RSET = 125 k I = 25 A I = 25 A 1 0.7 1.3 VS - 0.2 200 35 200 3.0 4.75 0.7 19 -40 Unit kHz kHz V mV ppm/C ns 5.25 5.25 1.1 V V mA ms +85 C 1 Guaranteed by measurement of initial offset and sensitivity. Sensitivity varies with VS. At VS = 3 V, sensitivity is typically 7.5%/g. Defined as the output change from ambient-to-maximum temperature or ambient-to-minimum temperature. 4 Actual frequency response is controlled by a user supplied external capacitor (CX, CY). 5 Bandwidth = 1/(2 x x 32 k x C). For CX, CY = 0.002 F, bandwidth = 2500 Hz. For CX, CY = 4.7 F, bandwidth = 1 Hz. Minimum/maximum values are not tested. 6 Self test response changes with VS. At VS = 3 V, self test output is typically 6%. 7 The value of fSET is defined by the following equation: 1 2 3 fSET = 8 t2 Larger values of CX, CY increase turn-on time. Turn-on time is approximately 160 x CX or CY + 3, where CX, CY are in F, and the resulting turn-on time is in ms. Rev. 0 | Page 3 of 12 ADXL212 ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Table 2. Parameter Acceleration (Any Axis, Unpowered) Acceleration (Any Axis, Powered) VS Output Short-Circuit Duration (Any Pin to Common) Operating Temperature Range Storage Temperature Range JA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages. Rating 1000 g 1000 g -0.3 V to +7.0 V Indefinite Table 3. Thermal Resistance Package Type 8-Lead Ceramic LCC -55C to +125C -65C to +150C JA 120C/W JC 20C/W Device Weight <1.0 g ESD CAUTION Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. CRITICAL ZONE TL TO TP tP TP TL tL TSMAX TSMIN tS RAMP-DOWN PREHEAT 09804-002 TEMPERATURE RAMP-UP t25C TO PEAK TIME Figure 2. Recommended Soldering Profile Table 4. Soldering Profile Condition Profile Feature Average Ramp Rate (TL to TP) Preheat Minimum Temperature (TSMIN) Minimum Temperature (TSMAX) Time (TSMIN to TSMAX) (tS) TSMAX to TL Ramp-Up Rate Time (tL) Maintained Above Liquidous (TL) Liquidous Temperature (TL) Time (tL) Peak Temperature (TP) Time Within 5C of Actual Peak Temperature (tP) Ramp-Down Rate Time 25C to Peak Temperature Sn63/Pb37 Pb Free 3C/sec maximum 100C 150C 60 sec to 120 sec 150C 200C 60 sec to 150 sec 3C/sec maximum 183C 60 sec to 150 sec 240C +0C/-5C 10 sec to 30 sec 6 minutes maximum Rev. 0 | Page 4 of 12 217C 60 sec to 150 sec 260C +0C/-5C 20 sec to 40 sec 6C/sec maximum 8 minutes maximum ADXL212 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS ADXL212 TOP VIEW (Not to Scale) VS 7 XFILT T2 2 6 YFILT COM 3 5 XOUT 4 YOUT 09804-003 8 ST 1 Figure 3. Pin Configuration Table 5. Pin Function Descriptions Pin No. 1 2 Mnemonic ST T2 3 4 5 6 7 8 COM YOUT XOUT YFILT XFILT VS Description Self Test. Frequency Set. Connect the RSET resistor to ground. t2 = RSET/125 M See the Theory of Operation section for details. Common. Y Channel Output. X Channel Output. Y Channel Filter Pin. X Channel Filter Pin. Voltage Supply. 3 V to 5.25 V. Rev. 0 | Page 5 of 12 ADXL212 TYPICAL PERFORMANCE CHARACTERISTICS 25 20 20 15 10 5 DUTY CYCLE OUTPUT (%) 5 57 56 55 54 53 52 51 50 49 48 47 DUTY CYCLE OUTPUT (%) Figure 7. Y-Axis Zero g Bias Deviation from Ideal at 25C 30 40 35 PERCENT OF POPULATION (%) 25 20 15 10 5 30 25 20 15 10 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 -1.0 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 -0.3 -0.2 -0.1 TEMPCO (mg/C) 09804-008 TEMPCO (mg/C) 0 09804-005 -0.3 -0.2 -0.1 -1.0 -0.9 -0.8 -0.7 -0.6 -0.5 -0.4 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 5 0 Figure 8. Y-Axis Zero g Bias Tempco Figure 5. X-Axis Zero g Bias Tempco 30 25 25 PERCENT OF POPULATION (%) 30 20 15 10 5 20 15 10 5.0 Rev. 0 | Page 6 of 12 13.20 13.05 09804-009 SENSITIVITY (%/g) Figure 9. Y-Axis Sensitivity at 25C Figure 6. X-Axis Sensitivity at 25C 13.90 12.75 12.60 12.45 12.30 12.15 12.00 11.70 09804-006 13.20 13.05 13.90 12.75 12.60 12.45 12.30 12.15 11.85 12.00 SENSITIVITY (%/g) 11.85 0 0 11.70 PERCENT OF POPULATION (%) 46 45 44 0 Figure 4. X-Axis Zero g Bias Deviation from Ideal at 25C PERCENT OF POPULATION (%) 10 43 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 0 15 09804-007 PERCENT OF POPULATION (%) 25 09804-004 PERCENT OF POPULATION (%) VS = 5 V, unless otherwise noted. ADXL212 54.0 53.5 53.0 13.1 13.0 12.9 12.8 SENSITIVITY (%/g) 51.0 50.5 50.0 49.5 49.0 48.5 48.0 47.5 47.0 46.5 46.0 12.6 12.5 12.4 12.3 12.2 12.1 40 35 35 90 09804-013 80 70 60 50 40 30 0 10 -10 20 NOISE DENSITY (g/ Hz) 09804-014 250 240 230 220 210 200 190 180 100 09804-011 250 240 230 220 210 200 190 180 170 160 150 0 140 0 130 5 110 5 120 -20 10 170 10 15 160 15 20 150 20 25 140 25 30 130 30 120 PERCENT OF POPULATION (%) 40 100 -30 TEMPERATURE (C) Figure 13. Sensitivity vs. Temperature, Parts Soldered to PCB Figure 10. Zero g Bias vs. Temperature, Parts Soldered to PCB NOISE DENSITY (g/ Hz) -40 -50 90 11.9 09804-010 80 70 60 50 40 30 20 0 10 -10 -20 -30 -40 12.0 TEMPERATURE (C) PERCENT OF POPULATION (%) 12.7 110 DUTY CYCLE (%) 52.5 52.0 51.5 Figure 14. Y-Axis Noise Density at 25C Figure 11. X-Axis Noise Density at 25C 0.9 10.8 10.6 0.8 VS = 5V CURRENT (mA) 10.2 10.0 9.8 9.6 9.4 0.7 0.6 0.5 VS = 3V 9.2 0.4 0 50 TEMPERATURE (C) 100 Figure 15. Supply Current vs. Temperature Figure 12. Self Test Response vs. Temperature Rev. 0 | Page 7 of 12 150 09804-015 90 0.3 -50 09804-012 TEMPERATURE (C) 80 70 60 50 40 30 20 10 0 -10 -20 -30 8.8 -40 9.0 -50 SELF TEST OUTPUT (%) 10.4 18 14 16 6 100 -7.5 T 90 VS = 5V 80 VS = 3V 70 60 50 40 20 CX, CY = 0.1F TIME SCALE = 2ms/div 10 1000 09804-017 SUPPLY CURRENT (A) 900 800 700 600 500 400 300 200 0 Figure 17. Supply Current at 25C Figure 19. Turn-On Time Rev. 0 | Page 8 of 12 09804-019 30 09804-018 -7.9 -8.3 -8.8 DELTA IN DUTY CYCLE (%) Figure 18. Y-Axis Self Test Response at 25C Figure 16. X-Axis Self Test Response at 25C PERCENT OF POPULATION (%) -9.2 -12.5 -7.5 DELTA IN DUTY CYCLE (%) 09804-016 -7.9 -8.3 -8.8 -9.2 -9.6 -10.0 -10.4 -10.8 0 -11.3 0 -11.7 2 -12.1 2 -9.6 4 -10.0 4 8 -10.4 6 10 -10.8 8 12 -11.3 10 14 -11.7 12 -12.1 PERCENT OF POPULATION (%) 16 -12.5 PERCENT OF POPULATION (%) ADXL212 ADXL212 THEORY OF OPERATION PIN 8 XOUT = 62.5% YOUT = 50% PIN 8 XOUT = 50% YOUT = 62.5% TOP VIEW (Not to Scale) XOUT = 50% YOUT = 50% PIN 8 XOUT = 37.5% YOUT = 50% EARTH'S SURFACE 09804-020 PIN 8 XOUT = 50% YOUT = 37.5% Figure 20. Output Response vs. Orientation The ADXL212 is a complete dual axis acceleration measurement system on a single monolithic IC. It contains a polysilicon surface-micromachined sensor and signal conditioning circuitry to implement an open-loop acceleration measurement architecture. The output signals are duty cycle modulated digital signals proportional to the acceleration. The ADXL212 is capable of measuring both positive and negative accelerations to 2 g. The accelerometer can measure static acceleration forces such as gravity, allowing the ADXL212 to be used as a tilt sensor. A single resistor (RSET) sets the period for a complete cycle (t2) according to the following equation: The sensor is a surface-micromachined polysilicon structure built on top of a silicon wafer. Polysilicon springs suspend the structure over the surface of the wafer and provide a resistance against acceleration forces. Deflection of the structure is measured using a differential capacitor that consists of independent fixed plates and plates attached to the moving mass. The fixed plates are driven by 180 out-of-phase square waves. Acceleration deflects the beam and unbalances the differential capacitor, resulting in an output square wave with an amplitude that is proportional to acceleration. Phase sensitive demodulation techniques are used to rectify the signal and determine the direction of the acceleration. where: Zero g Bias = 50% nominal. Sensitivity = 12.5%/g nominal. The output of the demodulator is amplified and brought off chip through a 32 k resistor, at which point the user can set the signal bandwidth of the device by adding a capacitor. This filtering improves measurement resolution and helps prevent aliasing. t2 (nominal) = RSET/125 M A 0 g acceleration produces a 50% nominal duty cycle. The acceleration can be determined by measuring the length of the positive pulse width (t1) and the period (t2). The nominal transfer function of the ADXL212 is Acceleration = ((t1/t2) - Zero g Bias)/Sensitivity PERFORMANCE High performance is built into the device through innovative design techniques rather than by using additional temperature compensation circuitry. As a result, there is essentially no quantization error or nonmonotonic behavior, and temperature hysteresis is very low (typically less than 10 mg over the -40C to +85C temperature range). Figure 10 shows the zero g output performance of eight parts (x-axis and y-axis) over a -40C to +85C temperature range. Figure 13 demonstrates the typical sensitivity shift over temperature for VS = 5 V. Sensitivity stability is optimized for VS = 5 V but remains very good over the specified range; it is typically better than 2% over temperature at VS = 3 V. After being low-pass filtered, the analog signals are converted to duty cycle modulated outputs that can be read by a counter. Rev. 0 | Page 9 of 12 ADXL212 APPLICATIONS INFORMATION POWER SUPPLY DECOUPLING For most applications, a single 0.1 F capacitor, CDC, adequately decouples the accelerometer from noise on the power supply. However, in some cases, particularly where noise is present at the 140 kHz internal clock frequency (or any harmonic thereof), noise on the supply may cause interference on the output of the ADXL212. If additional decoupling is needed, insert a 100 (or smaller) resistor or ferrite beads in the supply line of the ADXL212. In addition or as an alternative to adding the resistor or ferrite beads, a larger bulk bypass capacitor (in the range of 1 F to 22 F) can be added in parallel to CDC. SETTING THE BANDWIDTH USING CX AND CY The ADXL212 has provisions for band limiting the XOUT and YOUT pins. Capacitors must be added at these pins to implement low-pass filtering for antialiasing and noise reduction. The equation for the 3 dB bandwidth is DESIGN TRADE-OFFS FOR SELECTING FILTER CHARACTERISTICS: NOISE vs. BANDWIDTH The chosen accelerometer bandwidth ultimately determines the measurement resolution (smallest detectable acceleration). Filtering can be used to lower the noise floor, which improves the resolution of the accelerometer. Resolution is dependent on the analog filter capacitors at XFILT and YFILT. The ADXL212 has a typical PWM bandwidth of 500 Hz. The user must filter the signal to a bandwidth lower than 500 Hz to limit aliasing errors. The ADXL212 noise has the characteristics of white Gaussian noise, which contributes equally at all frequencies and is described in terms of g/Hz (that is, the noise is proportional to the square root of the accelerometer bandwidth). To maximize the resolution and dynamic range of the accelerometer, limit bandwidth to the lowest frequency needed by the application. With the single pole roll-off characteristic, the typical noise of the ADXL212 is determined by f3 dB = 1/(2(32 k) x C(X, Y)) or more simply, rms Noise = (500 g / Hz ) x ( BW x 1.6 ) f3 dB = 5 F/C(X, Y) The tolerance of the internal resistor (RFILT) can vary typically as much as 25% of its nominal value (32 k); the bandwidth varies accordingly. A minimum capacitance of 2000 pF for CX and CY is required in all cases. Table 6. Filter Capacitor Selection, CX and CY Bandwidth (Hz) 1 10 50 100 200 500 Capacitor (F) 4.7 0.47 0.10 0.05 0.027 0.01 At 100 Hz, the noise is rms Noise = (500 g / Hz ) x ( 100 x 1.6 ) = 6.3 mg Often, the peak value of the noise is desired. Peak-to-peak noise can only be estimated by statistical methods. Table 7 is useful for estimating the probabilities of exceeding various peak values, given the rms value. Table 7. Estimation of Peak-to-Peak Noise Peak-to-Peak Value 2 x rms 4 x rms 6 x rms 8 x rms SELF TEST The ST pin controls the self test feature. When this pin is set to VS, an electrostatic force is exerted on the beam of the accelerometer. The resulting movement of the beam allows the user to test if the accelerometer is functional. The typical change in output is 750 mg (corresponding to a duty cycle of 10%) and is additive to the accelerometer outputs. The ST pin can remain open circuit, or it can be connected to ground in normal use. Never expose the ST pin to voltages greater than VS + 0.3 V. If the system design is such that this condition cannot be guaranteed (that is, multiple supply voltages are present), a low VF clamping diode between ST and VS is recommended. % of Time that Noise Exceeds Nominal Peak-to-Peak Value 32 4.6 0.27 0.006 For example, at 100 Hz bandwidth, peak noise exceeds 25.2 mg 4.6% of the time. Peak-to-peak noise values provide the best estimate of the uncertainty in a single measurement. Table 8 lists the typical noise output of the ADXL212 for various CX and CY values. Table 8. Filter Capacitor Selection (CX, CY) Bandwidth(Hz) 10 50 100 500 Rev. 0 | Page 10 of 12 CX, CY (F) 0.47 0.1 0.047 0.01 RMS Noise (mg) 0.64 1.4 2 4.5 Peak-to-Peak Noise Estimate (mg) 3.8 8.6 12 27.2 ADXL212 USING THE ADXL212 WITH OPERATING VOLTAGES OTHER THAN 5 V The ADXL212 is tested and specified at VS = 5 V; however, it can be powered with VS as low as 3 V or as high as 5.25 V. Some performance parameters change as the supply voltage varies. The ADXL212 sensitivity varies proportionally to supply voltage. At VS = 3 V, the sensitivity is typically 7.5%/g. The zero g bias output is ratiometric to supply voltage; therefore, the zero g output is nominally equal to 50% at all supply voltages. An accelerometer is most sensitive to tilt when its sensitive axis is perpendicular to the force of gravity, that is, parallel to the surface of the earth. At this orientation, its response to changes in tilt is highest: its output changes nearly 17.5 mg per degree of tilt. When the accelerometer is oriented on axis to gravity, that is, near its +1 g or -1 g reading, the change in output acceleration per degree of tilt is negligible. At 45, its output changes by 12.2 mg per degree. Dual Axis Tilt Sensor: Converting Acceleration to Tilt Self test response in g is roughly proportional to the square of the supply voltage. Therefore, at VS = 3 V, the self test response is equivalent to approximately 270 mg (typical), or 6%. When the accelerometer is oriented with both its x-axis and y-axis parallel to the surface of the earth (reading approximately 0 g), it can be used as a dual axis tilt sensor with a roll axis and a pitch axis. The output tilt in degrees is calculated as follows: Pitch = ASIN(AX/1 g) The supply current decreases as the supply voltage decreases. Typical current consumption at VDD = 3 V is 450 A. Roll = ASIN(AY/1 g) where AX and AY are accelerations in g, ranging from -1 g to +1 g. USING THE ADXL212 AS A DUAL AXIS TILT SENSOR A common application of the ADXL212 is tilt measurement. An accelerometer uses the force of gravity as an input vector to determine its orientation in space. Be sure to account for overranges. It is possible for the accelerometers to output a signal greater than 1 g due to vibration, shock, or other accelerations. Rev. 0 | Page 11 of 12 ADXL212 OUTLINE DIMENSIONS 0.087 0.078 0.069 0.020 0.015 0.010 (R 4 PLCS) 0.028 0.020 DIA 0.012 1 7 0.180 0.177 SQ 0.174 R 0.008 (4 PLCS) 0.054 0.050 0.046 (PLATING OPTION 1, SEE DETAIL A FOR OPTION 2) 0.106 0.100 0.094 0.075 REF R 0.008 (8 PLCS) 0.008 0.006 0.004 TOP VIEW 5 3 BOTTOM VIEW 0.077 0.070 0.063 0.019 SQ DETAIL A (OPTION 2) 05-21-2010-D 0.203 0.197 SQ 0.193 0.030 0.025 0.020 Figure 21. 8-Terminal Ceramic Leadless Chip Carrier [LCC] (E-8-1) Dimensions shown in millimeters ORDERING GUIDE Model 1 ADXL212AEZ ADXL212AEZ-RL EVAL-ADXL212Z 1 Number of Axes 2 2 Specified Voltage (V) 5 5 Temperature Range -40C to +85C -40C to +85C Package Description 8-Terminal Ceramic Leadless Chip Carrier [LCC] 8-Terminal Ceramic Leadless Chip Carrier [LCC] Evaluation Board Z = RoHS Compliant Part. (c)2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D09804-0-5/11(0) Rev. 0 | Page 12 of 12 Package Option E-8-1 E-8-1