View ADS-117_4402603.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

www.murata-ps.com
ADS-117
12-Bit, 2MHz, Low-Power Sampling A/D Converters
PRODUCT OVERVIEW
DATEL's ADS-117 is a functionally complete, 12-bit, 2MHz, sampling A/D converter. Its standard, 24-pin, double-width DIP contains a fastsettling sample-hold amplifier, a 12-bit subranging (two-step) A/D converter, a precision reference, three-state output register and all the timing and control logic necessary to operate from a single start convert pulse. Digital input and output levels are TTL. Total harmonic distortion (THD) and signalto-noise ratio (including distortion) typically run -78dB and 70dB, respectively, with full scale inputs up to 100kHz. The ADS-117 requires 15V and +5V power supplies and typically consumes 1.6 Watts. Models are available for use in either commercial (0 to +70C) or military (-55 to +125C) operating temperature ranges and extended commerical (-40 to +85C).
FEATURES
12-bit resolution No missing codes 2MHz minimum throughput Functionally complete Small 24-pin DDIP Low-power, 1.6 Watts Three-state output buffers Samples to Nyquist frequencies
PIN 1 2 3 4 5 6 7 8 9 10 11 12 FUNCTION BIT 11 BIT 10 BIT 9 BIT 8 BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2
INPUT/OUTPUT CONNECTIONS PIN FUNCTION 24 23 22 21 20 19 18 17 16 15 14 13 -15V Supply ANALOG GROUND +15V SUPPLY +10V REFERENCE BIPOLAR ANALOG INPUT COMP BIN ENABLE (1-12) START CONVERT EOC DIGITAL GROUND +5V SUPPLY
BIT 12 (LSB)
BIT 1 (MSB)
BLOCK DIAGRAM
17 ENABLE (1-12) DAC
12 BIT 1 (MSB) +10V REF. 21 S2 S/H S1 BIPOLAR 20 BUFFER FLASH ADC REF 11 BIT 2
DIGITAL CORRECTION LOGIC
3-STATE OUTPUT REGISTER
10 BIT 3 9 8 7 6 5 4 3 2 1 BIT 4 BIT 5 BIT 6 BIT 7 BIT 8 BIT 9 BIT 10 BIT 11 BIT 12 (LSB)
ANALOG INPUT 19
- +
COMP BIN 18 START CONVERT 16 EOC 15 TIMING AND CONTROL LOGIC
13 +5V SUPPLY
14 DIGITAL GROUND
22 +15V SUPPLY
REGISTER
23 ANALOG GROUND
REGISTER
24 -15V SUPPLY
Figure 1. ADS-117 Functional Block Diagram
For full details go to www.murata-ps.com/rohs
www.murata-ps.com
Technical enquiries email: data.acquisition@murata-ps.com, tel: +1 508 339 3000
MDA_ADS-117.B01 Page 1 of 6
ADS-117
12-Bit, 2MHz, Low-Power Sampling A/D Converters
PARAMETERS +15V Supply (Pin 22) -15V Supply (Pin 24) +5V Supply (Pin 13) Digital Inputs (Pin 16, 17, 18) Analog Input (Pin 19) Lead Temp. (10 seconds)
ABSOLUTE MAXIMUM RATINGS LIMITS 0 to +16 0 to -16 0 to +6.0 -0.3 to +VDD +0.3 -9 to +15 +300
UNITS Volts Volts Volts Volts Volts C
FUNCTIONAL SPECIFICATIONS
(TA = +25C, VCC = +15V, +VDD =+5V, 2MHz sampling rate, and a minimum 3 minute warmup unless otherwise specified.) ANALOG INPUTS Input Voltage Range Bipolar Unipolar Input Impedence Input Capacitance
Logic Levels Logic "1" Logic "0" Logic Loading "1" Logic Loading "0" Resolution No Missing Codes (12 Bits; fin = 1MHz) Integral Non-Linearity 0 to +70C -55 to +125C Differential Non-Linearity 0 to +70C -55 to +125C / -45 to +85C Full Scale Absolute Accuracy (see Tech Note 1) 0 to +70C -55 to +125C / -45 to +85C Unipolar/Bipolar Zero Error 0 to +70C (see Tech Note 1) -55 to +125C / -45 to +85C Bipolar Offset Error 0 to +70C (see Tech Note 1) -55 to +125C / -45 to +85C Gain Error (see Tech Note 1) 0 to +70C -55 to +125C / -45 to +85C Internal Reference Voltage 0 to +70C -55 to +125C / -45 to +85C External Current
MIN.
-- -- 4.5 --
TYP.
5 0 to +10 5 6
MAX.
-- -- -- 15
UNITS
Volts Volts k pF
DIGITAL INPUTS
+2.0 -- -- -- -- -- -- -- -- +0.8 +5 -600 Volts Volts A A
PERFORMANCE 12 Bits 0 to +70C
-- -- -- -- 1/2 1 1/2 1 3 4 0.95 +1.5 LSB LSB LSB LSB
DYNAMIC PERF. (cont) Input Bandwith (-3dB) Small Signal (-20dB input) Large Signal (-0.5dB input) Feedthrough (1MHz) SNR (wo/distortion, -0.5dB) dc to 100kHz 0 to +70C -55 to +125C / -45 to +85C 100kHz to 500kHz 0 to +70C -55 to +125C / -45 to +85C 500kHz to 1MHz 0 to +70C -55 to +125C / -45 to +85C SNR (and distort., -0.5dB) dc to 100kHz 0 to +70C -55 to +125C / -45 to +85C 100kHz to 500kHz 0 to +70C -55 to +125C / -45 to +85C 500kHz to 1MHz 0 to +70C -55 to +125C / -45 to +85C Two-tone Intermodulation Distortion (fin = 970kHz, 990kHz, fs = 2Mhz, -0.5dB) Slew Rate Effect. Aperture Delay Time Overvoltage Recovery Time; 20% S/H Acq. Time, (to 0.01%) 0 to +70C -55 to +125C / -45 to +85C Conversion Rate
Output Coding Pin 18 High Pin 18 Low Logic Level Logic "1" Logic "0" Logic Loading "1" Logic Loading "0" Power Supply Ranges +15V Supply -15V Supply +5V Supply Power Supply Current +15V Supply -15V Supply +5V Supply Power Dissipation Power Supply Rejection
MIN.
8 7 -72
TYP.
10 9 -74
MAX.
-- -- --
UNITS
MHz MHz dB
-- -- 65 65 -- --
72 72 70 70 70 70
-- -- -- -- -- --
dB dB dB dB dB dB
-- -- 64 62 -- --
70 69 70 69 69 69
-- -- -- -- -- --
dB dB dB dB dB dB
-- -- -- -- -- -- 2
-68 210 -- -- 155 160 --
-- -- 16 500 165 170 --
dB V/s ns ns ns ns MHz
-- -- -- -- -- -- -- -- +9.97 +9.95 --
0.13 0.25 0.07 0.22 0.1 0.53 0.1 0.53 +10.0 -- --
0.44 0.73 0.38 0.73 0.38 0.73 0.38 0.73 +10.03 +10.05 1.5
%FSR %FSR %FSR %FSR %FSR %FSR % % Volts Volts mA
OUTPUTS Staight binary/Offset binary Complementary binary Complementary offset binary
+2.4 -- -- -- -- -- -- -- -- +0.4 -160 +6.4 Volts Volts A mA
POWER REQUIREMENTS
+14.25 -14.25 +4.75 -- -- -- -- -- +15.0 -15.0 +5.0 +48 -35 +75 1.6 -- +15.75 -15.75 +5.25 +58 -45 +85 1.9 0.07 Volts Volts Volts mA mA mA Watts %FSR%V
DYNAMIC PERFORMANCE
Spurious Free Dynamic Range (-0.5dB) dc to 100kHz -- 100kHz to 500kHz -- 500kHz to 1MHz -- Total Harm. Distort. (-0.5dB) dc to 100kHz -- 100kHz to 500kHz -- 500kHz to 1MHz -- -81 -75 -70 -78 -73 -71 -- -70 -- -- -68 -- dB dB dB dB dB dB
Effective bits is equal to: (SNR + Distortion) - 1.76 + 20 log 6.02 Full Scale Amplitude Actual Input Amplitude
See Table 1 also Same specifications for in-band harmonics.
For 12V, +5V operation, contact Murata Power Solutions.
www.murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
MDA_ADS-117.B01 Page 2 of 6
ADS-117
12-Bit, 2MHz, Low-Power Sampling A/D Converters
FUNCTIONAL SPECIFICATIONS. CONT.
PHYSICAL/ENVIRONMENTAL
Operating Temp. Range, Case ADS-117MC ADS-117ME ADS-117MM, 883 Storage Temperature Range Thermal Impedance jc ca Package Type Weight 0 -45 -55 -65 -- -- -- -- +70 +85 +125 +150 C C C C
-- 3 -- C/W -- 23 -- C/W 24-pin, metal-sealed, ceramic DDIP 0.42 ounces (12 grams)
TECHNICAL NOTES 1. Applications which are unaffected by endpoint errors or remove them through software will use the typical connections shown in Figure 3. Remove system errors or adjust the small initial errors of the ADS-117 to zero using the optional external circuitry shown in Figure 4. The external adjustment circuit has no effect on the throughput rate. 2. Always connect the analog and digital grounds to a ground plane beneath the converter for best performance. The analog and digital grounds are not connected to each other internally. 3. Bypass the analog and digital supplies and the +10V reference (pin 21) to ground with 4.7F, 25V tantalum electrolytic capacitors in parallel with 0.1F ceramic capacitors. Bypass the +10V reference (pin 21) to ANALOG GROUND (pin 23). 4. Obtain straight binary/offset binary output coding by tying COMP BIN (pin 18) to +5V or leaving it open. The device has an internal pull-up resistor on this pin. To obtain complementary binary or complementary offset binary output coding, tie pin 18 to ground. The pin 18 signal is compatible with CMOS/TTL logic levels for those users desiring dynamic control of this function. Do not change COMP BIN status while EOC is high. 5. To enable the three-state outputs, connect ENABLE (pin 17) to a logic "0" (low). To disable, connect pin 17 to a logic "1" (high). 6. To meet the guaranteed conversion rate, a maximum start convert pulse is specified. A wider start convert pulse will result in slower conversion rates. An initial start convert pulse is required before performing an actual conversion after power-up to assure the sample-hold is in the acquisition mode. Figure 2 shows the relationship between the various input signals. The timing shown applies over the operating temperature range and over the operating power supply range. 7. Re-initiating the START CONVERT (pin 16) while EOC is a logic "1" (high) will result in a new conversion sequence.
N START CONVERT 50ns typ., 30ns min., 60ns max. 10ns min. 25ns max. INTERNAL S/H Hold 10ns min. 17ns max. EOC Conversion Time 325ns typ. Acquisition Time 165ns typ. 170ns max.
N+1
60ns max.
35ns max. OUTPUT DATA DATA N-1 VALID 350ns min. INVALID DATA 150ns max. DATA N VALID INVALID DATA
Note: Scale is approximately 25ns per division.
Figure 2. ADS-117 Timing Diagram
www.murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
MDA_ADS-117.B01 Page 3 of 6
ADS-117
12-Bit, 2MHz, Low-Power Sampling A/D Converters
CALIBRATION PROCEDURE
R2
1. Connect the converter per Figure 3, Figure 4, and Table 1 for the appropriate input range. Apply a pulse of 150 nanoseconds to the START CONVERT input (pin 16) at a rate of 250kHz. This rate is chosen to reduce flicker if LED's are used on the outputs for calibration purposes. 2. Zero Adjustments Apply a precision voltage reference source between the amplifier's analog input and ground. Adjust the output of the reference source per Table 2. For unipolar, adjust the zero trimming potentiometer so that the output code flickers equally between 0000 0000 0000 and 0000 0000 0001 with the pin 18 tied high (straight binary) or between 1111 1111 1111 and 1111 1111 1110 with the pin 18 tied low (complementary binary). For bipolar operation, adjust the potentiometer such that the code flickers equally between 1000 0000 0000 and 1000 0000 0001 with pin 18 tied high (offset binary) or between 0111 1111 1111 and 0111 1111 1110 with pin 18 tied low (complementary offset binary). 3. Full-Scale Adjustment Set the output of the voltage reference used in step 2 to the value shown in Table 1. Adjust the gain trimming potentiometer so that the output code flickers equally between 1111 1111 1110 and 1111 1111 1111 for pin 18 tied high or between 0000 0000 0001 and 0000 0000 0000 for pin 18 tied low. 4. To confirm proper operation of the device, vary the precision reference voltage source to obtain the output coding listed in Table 3.
R1 SIGNAL INPUT
+15V
5k 50 GAIN ADJUST 5k 10k ZERO/ OFFSET ADJUST -15V
To Pin19 of ADS-117
For values of R1 and R2 refer to Table 1.
Figure 4. Optional Calibration Circuit
Table 1. Input Connections (using external calibration)
INPUT RANGE 0 +10V, 5 0 to 5V, 2.5V 0 to +2.5V, 1.25V R1 2 2 2 R2 2 6 14 UNIT k k k
Table 2. Zero and Gain Adjustments
INPUT RANGE 0 to +10V 5V ZERO ADJUST +1/2 LSB +1.22mV +1.22mV GAIN ADJUST RANGE +9.9963V +4.9963V
UNIPOLAR OPERATION 20 BIPOLAR INPUT 21 +10V REF. + 0.1F 4.7F
12 BIT 1 (MSB) 11 BIT 2 10 BIT 3 9 BIT 4 8 BIT 5 7 6 5 4 3 2 1 15 BIT 6 BIT 7 BIT 8 BIT 9
-15V 4.7F + 4.7F +15V +5V 4.7F + 0.1F 0.1F
24 ADS-117 23
22 13
BIT 10 BIT 11 BIT 12 (LSB) EOC 17 ENABLE (1-12) 16 START CONVERT 19 ANALOG INPUT
+ 0.1F 14 COMP BIN 18
+5V
NOTE: For unipolar operation, ground pin 20. For bipolar operation, connect pin 20 to pin 21. Always bypass pin 21 as shown for both unipolar and bipolar operation.
Figure 3. ADS-117 Connection Diagram
www.murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
MDA_ADS-117.B01 Page 4 of 6
ADS-117
12-Bit, 2MHz, Low-Power Sampling A/D Converters
Table 3. Output Coding
STRAIGHT BIN. UNIPOLAR SCALE +FS - 1 LSB +7/8 FS +3/4 FS +1/2 FS +1/4 FS +1/8 FS +1 LSB 0 INPUT RANGE 0 to +10V +9.9976 +8.7500 +7.5000 +5.0000 +2.5000 +1.2500 +0.0024 0.0000 COMP. BINARY INPUT RANGE 5V +4.9976 +3.7500 +2.5000 0.0000 -2.5000 -3.7500 -4.9976 -5.0000 BIPOLAR SCALE +FS -1 LSB +3/4FS +1/2FS 0 -1/2FS -3/4FS -FS+1LSB -FS
OUTPUT CODING MSB 1111 1110 1100 1000 0100 0010 0000 0000 LSB 1111 0000 0000 0000 0000 0000 0000 0000 1111 0000 0000 0000 0000 0000 0001 0000 MSB 0000 0001 0011 0111 1011 1101 1111 1111 0000 1111 1111 1111 1111 1111 1111 1111 LSB 0000 1111 1111 1111 1111 1111 1110 1111
OFF. BINARY
COMP. OFF. BIN.
0 -10 Amplitude Relative to Full Scale (dB) -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 -120 -130 -140 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Frequency (MHz) (fs = 2MHz, fin = 980kHz, Vin = -0.5dB, 4,096-point FFT)
Figure 5. FFT Analysis of ADS-117
www.murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
MDA_ADS-117.B01 Page 5 of 6
ADS-117
12-Bit, 2MHz, Low-Power Sampling A/D Converters
MECHANICAL DIMENSIONS INCHES (mm)
1.31 MAX. (33.27) Dimension Tolerances (unless otherwise indicated): 2 place decimal (.XX) 0.010 (0.254) 3 place decimal (.XXX) 0.005 (0.127) 0.80 MAX. (20.32) 1 12 Lead Material: Kovar alloy Lead Finish: 50 microinches (minimum) gold plating over 100 microinches (nominal) nickel plating
24
13
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) 0.018 0.002 (0.457) 0.100 (2.540) 0.040 (1.016)
+0.002 -0.001
SEATING PLANE 0.025 (0.635)
0.600 0.010 (15.240)
0.100 (2.540)
ORDERING INFORMATION
MODEL NUMBER ADS-117MC ADS-117ME ADS-117MM ADS-117/883 OPERATING TEMP. RANGE 0 to +70C -40 to +85C -55 to +125C -55 to +125C ACCESSORIES ADS-EVAL1 HS-24 Evaluation Board (without ADS-117) Heat Sink for all ADS-117 models
For MIL-STD-883 product specification or availability of surface-mount packaging, contact DATEL. Receptacles for PC mounting can be ordered through AMP Inc., Part # 3-331272-8 (Component Lead Socket), 24 required.
USA: Canada: UK: France: Germany: Japan: China: Singapore:
Mansfield (MA), Tel: (508) 339-3000, email: sales@murata-ps.com Toronto, Tel: (866) 740-1232, email: toronto@murata-ps.com Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com Munchen, Tel: +49 (0)89-544334-0, email: munich@murata-ps.com Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com Parkway Centre, Tel: +65 6348 9096, email: singapore@murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: sales@murata-ps.com ISO 9001 and 14001 REGISTERED
03/23/09
Murata Power Solutions, Inc. 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. (c) 2009 Murata Power Solutions, Inc.
www.murata-ps.com
MDA_ADS-117.B01 Page 6 of 6

▲Up To Search▲

Price & Availability of ADS-117

	To Download ADS-117 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .