(R) ADS-947 (R) 14-Bit, 10MHz Sampling A/D Converters PRODUCT OVERVIEW The ADS-947 is a 14-bit, 10MHz sampling A/D converter. This device accurately samples full-scale input signals up to Nyquist frequencies with no missing codes. Excellent differential nonlinearity error (DNL), signal-to-noise ratio (SNR), and total harmonic distortion (THD) make the ADS-947 the ideal choice for both time-domain (CCD/FPA imaging, scanners, process control) and frequencydomain (radar, telecommunications, spectrum analysis) applications. The functionally complete ADS-947 contains a fast-settling sample/hold amplifier, a subranging (two-pass) A/D converter, an internal reference, FEATURES 14-bit resolution 10MHz minimum sampling rate No missing codes Ideal for both time and frequency-domain applications Excellent THD (-81dB) and SNR (76dB) Edge-triggered Small, 24-pin, ceramic DDIP or SMT Requires only +5V and -5.2V supplies Low-power, 2 Watts timing/control logic, and error-correction circuitry. Digital input and output levels are TTL. The ADS947 only requires the rising edge of a start convert pulse to operate. Requiring only +5V and -5.2V supplies, the ADS-947 typically dissipates just 2 Watts. The device is offered with a bipolar input range of 2V. Models are available for use in either commercial (0 to +70C) or extended (-40 to +100C) operating temperature ranges. A proprietary, auto-calibrating, error-correcting circuit allows the device to achieve specified performance over the extended temperature range. PIN 1 2 3 4 5 6 7 8 9 10 11 12 INPUT/OUTPUT CONNECTIONS FUNCTION PIN FUNCTION BIT 1 (MSB) 24 ANALOG GROUND BIT 2 23 OFFSET ADJUST BIT 3 22 +5V ANALOG SUPPLY BIT 4 21 ANALOG INPUT BIT 5 20 -5.2V SUPPLY BIT 6 19 ANALOG GROUND BIT 7 18 START CONVERT BIT 8 17 DATA VALID BIT 9 16 BIT 14 (LSB) BIT 10 15 BIT 13 BIT 11 14 DIGITAL GROUND BIT 12 13 +5V DIGITAL SUPPLY BLOCK DIAGRAM OFFSET ADJUST 23 BUFFER 16 BIT 14 (LSB) FLASH ADC 1 + 15 BIT 13 12 BIT 12 POWER AND GROUNDING REF 22 +5V DIGITAL SUPPLY 13 -5.2V SUPPLY 20 ANALOG GROUND 19, 24 DIGITAL GROUND 14 DAC AMP START CONVERT 18 DATA VALID 17 FLASH ADC 2 REGISTER +5V ANALOG SUPPLY 11 BIT 11 OUTPUT REGISTER S/H DIGITAL CORRECTION LOGIC - REGISTER ANALOG INPUT 21 10 BIT 10 9 BIT 9 8 BIT 8 7 BIT 7 6 BIT 6 5 BIT 5 4 BIT 4 3 BIT 3 2 BIT 2 1 BIT 1 (MSB) TIMING AND CONTROL LOGIC Figure 1. ADS-947 Functional Block Diagram DATEL * 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA * Tel: (508) 339-3000 * www.datel.com 01 Apr 2011 * e-mail: help@datel.com MDA_ADS-947.B02 Page 1 of 8 (R) ADS-947 (R) 14-Bit, 10MHz Sampling A/D Converters ABSOLUTE MAXIMUM RATINGS PARAMETERS LIMITS +5V Supply (Pins 13, 22) 0 to +6 -5.2V Supply (Pin 20) 0 to -5.5V Digital Input (Pin 18) -0.3 to +VDD +0.3 Analog Input (Pin 21) 5 Lead Temperature (10 seconds) +300 UNITS Volts Volts Volts Volts C PARAMETERS Operating Temp. Range, Case ADS-947MC, GC ADS-947ME, GE, QL Thermal Impedance Tjc Tca Storage Temperature Range Package Type Weight PHYSICAL/ENVIRONMENTAL MIN. TYP. 0 -40 -- -- MAX. UNITS +70 +100 C C -- 6 -- C/Watt -- 23 -- C/Watt -65 -- +150 C 24-pin, metal-sealed, ceramic DDIP or SMT 0.46 ounces (13 grams) FUNCTIONAL SPECIFICATIONS (TA = +25C, +VDD = +5V, -VDD = -5.2V, 10MHz sampling rate,and a minimum 3 minute warmup unless otherwise specified.) ANALOG INPUT Input Voltage Range d Input Resistance Input Capacitance DIGITAL INPUT Logic Levels Logic "1" Logic "0" Logic Loading "1" Logic Loading "0" Start Convert Positive Pulse Width STATIC PERFORMANCE Resolution Integral Nonlinearity (fin = 10kHz) Differential Nonlinearity (fin = 10kHz) Full Scale Absolute Accuracy Bipolar Zero Error (Tech Note 2) Gain Error (Tech Note 2) No Missing Codes (fin = 10kHz) DYNAMIC PERFORMANCE Peak Harmonics (-0.5dB) dc to 1MHz 1MHz to 2.5MHz 2.5MHz to 5MHz Total Harmonic Distortion (-0.5dB) dc to 1MHz 1MHz to 2.5MHz 2.5MHz to 5MHz Signal-to-Noise Ratio (w/o distortion, -0.5dB) dc to 1MHz 1MHz to 2.5MHz 2.5MHz to 5MHz Signal-to-Noise Ratio f (& distortion, -0.5dB) dc to 1MHz 1MHz to 2.5MHz 2.5MHz to 5MHz Noise Two-Tone Intermodulation Distortion (fin = 2.45MHz, 1.975MHz, fs = 10MHz, -0.5dB) Input Bandwidth (-3dB) Small Signal (-20dB input) Large Signal (-0.5dB input) Feedthrough Rejection (fin = 5MHz) Slew Rate Aperture Delay Time Aperture Uncertainty S/H Acquisition Time (to 0.003%FSR, 4V step) Overvoltage Recovery Time A/D Conversion Rate DATEL MIN. -- -- -- +25C TYP. 2 250 6 MAX. -- -- 15 MIN. -- -- -- 0 TO +70C TYP. 2 250 6 MAX. -- -- 15 MIN. -- -- -- -55 TO +125C TYP. 2 250 6 MAX. -- -- 15 UNITS Volts : pF +2.0 -- -- -- 10 -- -- -- -- 20 -- +0.8 +20 -20 -- +2.0 -- -- -- 10 -- -- -- -- 20 -- +0.8 +20 -20 -- +2.0 -- -- -- 10 -- -- -- -- 20 -- +0.8 +20 -20 -- Volts Volts A A ns -- -- -0.95 -- -- -- 14 14 0.75 0.5 0.15 0.1 0.2 -- -- -- +1.25 0.4 0.3 0.4 -- -- -- -0.95 -- -- -- 14 14 0.75 0.5 0.15 0.1 0.2 -- -- -- +1.25 0.4 0.3 0.4 -- -- -- -0.95 -- -- -- 14 14 1 0.75 0.4 0.3 0.4 -- -- -- +1.5 0.8 0.6 1.5 -- Bits LSB LSB %FSR %FSR % Bits -- -- -- -83 -78 -76 -76 -72 -71 -- -- -- -83 -78 -76 -75 -72 -71 -- -- -- -79 -73 -71 -71 -68 -65 dB dB dB -- -- -- -81 -76 -74 -74 -71 -69 -- -- -- -81 -76 -74 -74 -71 -69 -- -- -- -77 -72 -69 -70 -66 -63 dB dB dB 72 72 71 76 76 75 -- -- -- 72 72 71 76 76 75 -- -- -- 70 70 70 75 75 75 -- -- -- dB dB dB 70 70 68 -- 74 74 73 150 -- -- -- -- 70 70 68 -- 74 74 73 150 -- -- -- -- 68 66 65 -- 73 71 70 150 -- -- -- -- dB dB dB Vrms -- -82 -- -- -82 -- -- -82 -- dB -- -- -- -- -- -- -- -- 10 30 10 85 400 +5 2 40 -- -- -- -- -- -- -- -- 45 100 -- -- -- -- -- -- -- -- -- 10 30 10 85 400 +5 2 40 -- -- -- -- -- -- -- -- 45 100 -- -- -- -- -- -- -- -- -- 10 30 10 85 400 +5 2 40 -- -- -- -- -- -- -- -- 45 100 -- MHz MHz dB V/s ns ps rms ns ns MHz * 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA * Tel: (508) 339-3000 * www.datel.com 01 Apr 2011 * e-mail: help@datel.com MDA_ADS-947.B02 Page 2 of 8 (R) ADS-947 (R) 14-Bit, 10MHz Sampling A/D Converters DIGITAL OUTPUTS Logic Levels Logic "1" Logic "0" Logic Loading "1" Logic Loading "0" Output Coding POWER REQUIREMENTS Power Supply Ranges +5V Supply -5.2V Supply Power Supply Currents +5V Supply -5.2V Supply Power Dissipation Power Supply Rejection MIN. +25C TYP. MAX. MIN. +2.4 -- -- -- -- -- -- -- -- +0.4 -4 +4 +2.4 -- -- -- +4.75 -4.75 +5.0 -5.2 +5.25 -5.45 +4.75 -4.75 +5.0 -5.2 -- -- -- -- +250 -200 2.0 -- +260 -210 2.25 0.1 -- -- -- -- +250 -200 2.0 -- Footnotes: All power supplies should be on before applying a start convert pulse. All supplies and the clock (start convert pulses) must be present during warmup periods. The device must be continuously converting during this time. Contact DATEL for other input voltage ranges; the range for ADS-947MC-31122 is 0.5 Volts. A 10MHz clock with a 20ns positive pulse width is used for all production testing. See Timing Diagram, figure 4, for more details. Effective bits is equal to: Full Scale Amplitude (SNR + Distortion) - 1.76 + 20 log Actual Input Amplitude 0 TO +70C TYP. MAX. MIN. -55 TO +125C TYP. MAX. UNITS -- -- -- +0.4 -- -4 -- +4 Offset Binary +2.4 -- -- -- -- -- -- -- -- +0.4 -4 +4 Volts Volts mA mA +5.25 -5.45 +4.9 -4.9 +5.0 -5.2 +5.25 -5.45 Volts Volts +260 -210 2.25 0.1 -- -- -- -- +250 -200 2.0 -- +260 -210 2.25 0.1 mA mA Watts %FSR/%V This is the time required before the A/D output data is valid once the analog input is back within the specified range. This time is only guaranteed if the input does not exceed 2.2V (S/H saturation voltage). The minimum supply voltages of +4.9V and -5.1V for VDD are required for -40C operation only. The minimum limits are +4.75V and -4.95V when operating at +125C. 6.02 TECHNICAL NOTES 1. Obtaining fully specified performance from the ADS-947 requires careful attention to pc card layout and power supply decoupling. The device's analog and digital ground systems are connected to each other internally. For optimal performance, tie all ground pins (14, 19 and 24) directly to a large analog ground plane beneath the package. 3. Applying a start convert pulse while a conversion is in progress (EOC = logic 1) will initiate a new and inaccurate conversion cycle. Data for the interrupted and subsequent conversions will be invalid. 4. A passive bandpass filter is used at the input of the A/D for all production testing. Bypass all power supplies to ground with 4.7F tantalum capacitors in parallel with 0.1F ceramic capacitors. Locate the bypass capacitors as close to the unit as possible. 2. The ADS-947 achieves its specified accuracies without the need for external calibration. If required, the device's small initial offset and gain errors can be reduced to zero using the adjustment circuitry shown in Figures 2 and 3. When using this circuitry, or any similar offset and gain calibration hardware, make adjustments following warmup. To avoid interaction, always adjust offset before gain. 2k: GAIN ADJUST +5V 1.98k: SIGNAL INPUT To Pin 21 of ADS-946 50: -5V Figure 2. Optional ADS-947 Gain Adjust Calibration Circuit DATEL * 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA * Tel: (508) 339-3000 * www.datel.com 01 Apr 2011 * e-mail: help@datel.com MDA_ADS-947.B02 Page 3 of 8 (R) ADS-947 (R) 14-Bit, 10MHz Sampling A/D Converters CALIBRATION PROCEDURE Gain Adjust Procedure Any offset and/or gain calibration procedures should not be implemented until devices are fully warmed up. To avoid interaction, offset must be adjusted before gain. The ranges of adjustment for the circuits in Figures 2 and 3 are guaranteed to compensate for the ADS-947's initial accuracy errors and may not be able to compensate for additional system errors. 1. Apply +1.99963V to the ANALOG INPUT (pin 21). 2. Adjust the gain potentiometer until all output bits are 1's and the LSB flickers between 1 and 0. 3. To confirm proper operation of the device, vary the input signal to obtain the output coding listed in Table 2. A/D converters are calibrated by positioning their digital outputs exactly on the transition point between two adjacent digital output codes. This can be accomplished by connecting LED's to the digital outputs and adjusting until certain LED's "flicker" equally between on and off. Other approaches employ digital comparators or microcontrollers to detect when the outputs change from one code to the next. INPUT VOLTAGE RANGE ZERO ADJUST +1/2 LSB GAIN ADJUST +FS -11/2 LSB 2V +122V +1.99963V Offset adjusting for the ADS-947 is normally accomplished at the point where the MSB is a 1 and all other output bits are 0's and the LSB just changes from a 0 to a 1. This digital output transition ideally occurs when the applied analog input is +1/2 LSB (+122V). Table 1. Gain and Zero Adjust BIPOLAR SCALE +FS -1 LSB +3/4 FS +1/2 FS 0 -1/2 FS -3/4 FS -FS +1 LSB -FS Gain adjusting is accomplished when all bits are 1's and the LSB just changes from a 1 to a 0. This transition ideally occurs when the analog input is at +full scale minus 11/2 LSB's (+1.99963V). Zero/Offset Adjust Procedure 1. Apply a train of pulses to the START CONVERT input (pin 18) so the converter is continuously converting. 2. Apply +122V to the ANALOG INPUT (pin 21). +5V ~ -5.2V ANALOG INPUT 4.7F + 4.7F 4.7F + + 0.1F 0.1F 20 24 0.1F 22, 13 14 1 2 3 4 5 6 7 21 23 ADS-947 20k -5V START CONVERT BIT 1 (MSB) BIT 2 BIT 3 BIT 4 BIT 5 BIT 6 BIT 7 8 BIT 8 9 BIT 9 10 BIT 10 11 BIT 11 12 BIT 12 15 BIT 13 16 BIT 14 (LSB) 17 DATA VALID +5V ZERO/ OFFSET ADJUST OFFSET BINARY MSB LSB 11 1111 1111 1111 11 1000 0000 0000 11 0000 0000 0000 10 0000 0000 0000 01 0000 0000 0000 00 1000 0000 0000 00 0000 0000 0001 00 0000 0000 0000 Table 2. Output Coding for Bipolar Operation 3. Adjust the offset potentiometer until the output bits are 10 0000 0000 0000 and the LSB flickers between 0 and 1. 19 INPUT RANGE (2V RANGE) +1.99976 +1.50000 +1.00000 0.00000 -1.00000 -1.50000 -1.99976 -2.00000 18 ~ A single +5V supply should be used for both the +5V analog and +5V digital. If separate supplies are used, the difference between the two cannot exceed 100mV. Figure 3. Typical ADS-947 Connection Diagram DATEL * 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA * Tel: (508) 339-3000 * www.datel.com 01 Apr 2011 * e-mail: help@datel.com MDA_ADS-947.B02 Page 4 of 8 (R) ADS-947 (R) 14-Bit, 10MHz Sampling A/D Converters THERMAL REQUIREMENTS the device, should be as heavy as possible to help conduct heat away from the package. All DATEL sampling A/D converters are fully characterized and specified over operating temperature (case) ranges of 0 to +70C and -40 to +100C. All room temperature (TA = +25C) production testing is performed without the use of heat sinks or forced air cooling. Thermal impedance figures for each device are listed in their respective specification tables. These devices do not normally require heat sinks, however, standard precautionary design and layout procedures should be used to ensure devices do not overheat. The ground and power planes beneath the package, as well as all pcb signal runs to and from N START CONVERT Electrically-insulating, thermally-conductive "pads" may be installed underneath the package. Devices should be soldered to boards rather than socketed, and of course, minimal air flow over the surface can greatly help reduce the package temperature. N+1 20ns typ. 10ns typ. Acquisition Time INTERNAL S/H Hold 65ns typ. (61ns min., 68ns max.) INTERNAL EOC Conversion Time 70ns typ. 35ns typ. 25ns typ. (22ns min., 28ns max.) 15ns DATA VALID DATA N-1 VALID DATA N VALID 40ns typ. (5ns) 40ns typ. (5ns) 40ns max. OUTPUT DATA 50ns typ. DATA N-1 VALID 50ns typ. (5ns) DATA N VALID INVALID DATA Notes: 1. Scale is approximately 5ns per division. Sampling rate = 10MHz. 2. The start convert pulse must be between 20 and 50ns wide or between 80 and 100ns wide (when sampling at 10MHz) to ensure proper operation. For sampling rates less than 10MHz, the start pulse can be wider than 85nsec, however a minimum pulse width low of 15nsec should be maintained. A 10MHz clock with a 20nsec positive pulse width is used for all production testing. 3. For no latency delay and an input range of 0.5 Volts, order ADS-947MC-31122. Figure 4. ADS-947 Timing Diagram DATEL * 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA * Tel: (508) 339-3000 * www.datel.com 01 Apr 2011 * e-mail: help@datel.com MDA_ADS-947.B02 Page 5 of 8 (R) ADS-947 (R) 14-Bit, 10MHz Sampling A/D Converters (fs = 8MHz, fin = 3.85MHz, Vin = -0.5dB, 16,384 point FFT) Figure 5. FFT Analysis of ADS-947 Figure 6. ADS-947 Histogram and Differential Nonlinearity DATEL * 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA * Tel: (508) 339-3000 * www.datel.com 01 Apr 2011 * e-mail: help@datel.com MDA_ADS-947.B02 Page 6 of 8 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA * ANA. IN Tel: (508) 339-3000 * SG10 SG3 SG2 SG1 P4 P2 26 24 22 20 18 16 14 12 10 8 6 4 2 25 23 21 19 17 15 13 11 9 7 5 3 1 ANA. IN 20H L7 20H L6 20H L5 20H L4 20H L3 20H L2 20H L1 + + + C8 0.01F C9 0.01F 2.2F C2 2.2F C11 C4 2.2F C5 2.2F 0.01F C14 0.01F 2.2F C7 C13 C6 0.01F C12 0.01F 0.01F 2.2F 2.2F C10 C3 R2 SG5 -5V +5VA +15V -15V -5VA +5V 5 +15V 10 12 11 13 0.1F (Optional) U6 HCT7474 9 Q 8 5 4 13 12 SPARE GATES 0.1F C19 (Optional) -15V C20 PR D CK CLR 2 R1 C18 0.1F (Optional) SG6 20k -15V SG8 CLC402 HI2541 10 +5VA OFFSET ADJUST -5VA SG7 6 U4 11 +15V +5VF + (Optional) 4 - +5VF OPTION C1 + + + * + DATEL 11 01 Apr 2011 6 HCT7474 7 +5V 24 23 22 21 20 19 18 17 16 15 14 13 ADS-947 AGND BIT1 OFFSET BIT2 +5VA BIT3 AIN BIT4 -5.2V BIT5 AGND BIT6 START BIT7 DATA VALID BIT8 BIT14 BIT9 BIT13 BIT10 DGND BIT11 +5VD BIT12 U1 1 2 3 4 5 6 7 8 9 10 11 12 3.2k 2.2F 14 4 PR 5 2 D U6 Q 6 3 CK Q 1 R3 CLR START CONVERT 15pF C25 +5VA 8 C23 0.1F C24 + +5VF 2 3 JPR1 10 9 1 P3 U5 U5 + 0.1F 2.2F C16 C22 3 2 3 4 5 6 7 8 9 11 2 3 4 5 6 7 8 9 11 74HCT573 C21 74HCT573 19 18 17 16 15 14 13 12 1 +5VF 19 18 17 16 15 14 13 12 1 2.2F Q1 1D 2D Q2 Q3 3D 4D Q4 U2 Q5 5D 6D Q6 Q7 7D Q8 8D OE CE 10 20 10 C17 0.1F Q1 1D 2D Q2 Q3 3D 4D Q4 U3 Q5 5D 6D Q6 Q7 7D Q8 8D OE CE 20 + +5VF 2. CLOSE SG1-SG3, SG9, SG10. ALL RESISTORS ARE IN OHMS. C1 - C7 ARE 20V. 1. UNLESS OTHERWISE SPECIFIED ALL CAPACITORS ARE 50V. NOTES: 74HCT86 8 74HCT86 2 1 START CONVERT Figure 7. ADS-947 Evaluation Board Schematic (ADS-B947) U5 7 -5.2V 2.2F C27 74HCT86 0.1F C15 7 GND U5 14 +5VF ANA. IN SG4 0.1F C26 X1 SG9 14 +5VF 10MHz CRYSTAL + 2 3 JPR2 1 CE B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 TRIG 2 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 P1 1 33 31 29 27 25 23 21 19 17 15 13 11 9 7 5 3 (R) (R) ADS-947 14-Bit, 10MHz Sampling A/D Converters www.datel.com * e-mail: help@datel.com MDA_ADS-947.B02 Page 7 of 8 (R) ADS-947 (R) 14-Bit, 10MHz Sampling A/D Converters MECHANICAL DIMENSIONS INCHES (mm) 1.31 MAX. (33.27) 24-Pin DDIP Versions 24 Dimension Tolerances (unless otherwise indicated): 2 place decimal (.XX) 0.010 (0.254) 3 place decimal (.XXX) 0.005 (0.127) 13 Lead Material: Kovar alloy 0.80 MAX. (20.32) ADS-947MC ADS-947ME 1 Lead Finish: 50 microinches (minimum) gold plating over 100 microinches (nominal) nickel plating 12 0.100 TYP. (2.540) 1.100 (27.940) 0.235 MAX. (5.969) PIN 1 INDEX 0.200 MAX. (5.080) 0.010 (0.254) 0.190 MAX. (4.826) 0.100 (2.540) 0.600 0.010 (15.240) SEATING PLANE 0.025 (0.635) 0.040 (1.016) 0.018 0.002 (0.457) +0.002 -0.001 0.100 (2.540) 1.31 MAX. (33.02) 24-Pin Surface Mount Versions Dimension Tolerances (unless otherwise indicated): 2 place decimal (.XX) 0.010 (0.254) 3 place decimal (.XXX) 0.005 (0.127) 13 24 0.80 MAX. (20.32) ADS-947GC ADS-947GE 1 0.190 MAX. (4.826) Lead Material: Kovar alloy Lead Finish: 50 microinches (minimum) gold plating over 100 microinches (nominal) nickel plating 12 0.020 TYP. (0.508) 0.060 TYP. (1.524) 0.130 TYP. (3.302) PIN 1 INDEX 0.100 (2.540) 0.100 TYP. (2.540) 0.020 (0.508) 0.015 (0.381) MAX. radius for any pin 0.010 TYP. (0.254) 0.040 (1.016) ORDERING INFORMATION OPERATING TEMP. RANGE 0 to +70C 24-PIN PACKAGE DDIP ADS-B947 Evaluation Board (without ADS-947) 0 to +70C DDIP HS-24 Heat Sink for all ADS-947 DDIP models ADS-947ME -40 to +100C DDIP ADS-947ME-QL -40 to +100C DDIP ADS-947GC 0 to +70C SMT ADS-947GE -40 to +100C SMT MODEL NUMBER ADS-947MC ADS-947MC-31122 DATEL 11 Cabot Boulevard, Mansfield, MA 02048-1151 USA ACCESSORIES Receptacles for pc board mounting can be ordered through AMP, Inc., Part # 3-331272-8 (Component Lead Socket), 24 required. For MIL-STD-883 product specifcation, contact DATEL. . makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. ITAR and ISO 9001/14001 REGISTERED www.datel.com * e-mail: help@datel.com 01 Apr 2011 MDA_ADS-947.B02 Page 8 of 8