ADS901E

ADS901 BURR-BROWN | Alldatasheet

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Technical content

DESCRIPTION

The ADS901 is a high-speed pipelined analog-to- digital converter that operates from a +3V power supply. This complete converter includes a wide band- width track/hold and a 10-bit quantizer. The full scale input range is set by external references. The ADS901 employs digital error correction tech- niques to provide excellent differential linearity for demanding imaging applications. Its low distortion and high SNR give the extra margin needed for telecommunications, video and test instrumentation applications. The ADS901 is available in a 28-lead SSOP package. 10-Bit, 20MHz, +3V Supply ANALOG-TO-DIGITAL CONVERTER

APPLICATIONS

l BATTERY POWERED EQUIPMENT l CAMCORDERS l DIGITAL CAMERAS l COMPUTER SCANNERS l COMMUNICATIONS

FEATURES

l LOW POWER: 48mW at +3V l SUPPLY RANGE: +2.7V to +3.7V l ADJUSTABLE FULL SCALE RANGE WITH EXTERNAL REFERENCES l NO MISSING CODES l WIDEBAND TRACK/HOLD: 350MHz l POWER DOWN: 15mW l 28-LEAD SSOP PACKAGE TM ADS901E © 1997 Burr-Brown Corporation PDS-1340C Printed in U.S.A. June, 1999 International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

At TA = +25°C, VS = LVDD = +3V, REFB = 1V, REFT = 2V, Specified Input Range = 1V to 2V, Sampling Rate = 20MHz, unless otherwise specified. The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems. ADS901E PARAMETER CONDITIONS TEMP MIN TYP MAX UNITS Resolution 10 Bits Specified Temperature Range Ambient Air –40 +85 °C ANALOG INPUT Specified Full Scale Input Range(1) 1Vp-p V Common-Mode Voltage (Midscale) 1.5 V Analog Input Bias Current 1 mA Input Impedance 1.25 || 5 M W || pF DIGITAL INPUT Logic Family CMOS Compatible Convert Command (Start Conversion) Start Conversion Rising Edge of Convert Clock CONVERSION CHARACTERISTICS Sample Rate Full 10k 20M Samples/s Data Latency 5 Clk Cyc DYNAMIC CHARACTERISTICS Differential Linearity Error (Largest Code Error) f = 500kHz Full –0.8 LSB f = 9MHz Full –0.9 –1.0 LSB No Missing Codes Full Guaranteed Integral Nonlinearity Error, f = 500kHz Full –3.5 LSB Spurious Free Dynamic Range (2) f = 500kHz (–1dBFS(3) input) Full 50 dBFS (3) f = 9MHz (–1dBFS input) Full 45 49 dBFS Signal-to-Noise Ratio (SNR) Referred to Sinewave Input Signal f = 500kHz (–1dBFS input) Full 53 dB f = 9MHz (–1dBFS input) Full 48 53 dB Maximum SNR Referred to DC Full Scale Input Signal f = 9MHz (–1dBFS input) 62 dB Signal-to-(Noise + Distortion) (SINAD) f = 500kHz (–1dBFS input) Full 50 dB f = 3.58MHz (–1dBFS input) Full 50 dB f = 9MHz (–1dBFS input) Full 45 49 dB Effective Number of Bits (4) fIN = 3.58MHz 8.0 Bits Differential Gain Error NTSC, PAL 2.3 % Differential Phase Error NTSC, PAL 1.0 degrees Output Noise Input Grounded 0.2 LSB rms Aperture Delay Time 3n s Aperture Jitter 7 ps rms Analog Input Bandwidth Small Signal –20dBFS Input 350 MHz Full Power 0dBFS Input 100 MHz Overvoltage Recovery Time (5) 2n s DIGITAL OUTPUTS C L = 15pF Logic Family CMOS Compatible Logic Coding Straight Offset Binary High Output Voltage, VOH +2.4 LV DD V Low Output Voltage, VOL +0.4 V 3-State Enable Time OE = L 20 40 ns 3-State Disable Time OE = H 18 10 ns Internal Pull-Down to Gnd 50 k W Power-Down Enable Time Pwrdn = L 133 ns Power-Down Disable Time Pwrdn = H 18 ns Internal Pull-Down to Gnd 50 k W

Gain Error Full 2.5 %FS Input Offset(6) Full 0.4 %FS Power Supply Rejection (Gain) D VS = +10% Full 56 dB Power Supply Rejection (Offset) Full 68 dB External REFT Voltage Range Full REFB +0.5 2 V S–0.8 V External REFB Voltage Range Full 0.8 1 REFT –0.5 V Reference Input Resistance 4k W POWER SUPPLY REQUIREMENTS Supply Voltage: +V S Operating Full +2.7 +3.0 +3.7 V Supply Current: +IS Operating Full 16 mA Power Dissipation Operating Full 49 60 mW Power Dissipation (Power Down) Operating Full 15 mW Thermal Resistance, qJA 28-Lead SSOP 89 °C/W NOTES: (1) The single-ended input range is set by REFB and REFT values. (2) Spurious Free Dynamic Range refers to the magnitude of the largest harmonic. (3) ADS901E PARAMETER CONDITIONS TEMP MIN TYP MAX UNITS SPECIFICATIONS (CONT) At TA = +25°C, VS = LVDD = +3V, REFB = 1V, REFT = 2V, Specified Input Range = 1V to 2V, Sampling Rate = 20MHz, unless otherwise specified. ABSOLUTE MAXIMUM RATINGS ELECTROSTATIC DISCHARGE SENSITIVITY This integrated circuit can be damaged by ESD. Burr-Brown recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. PACKAGE SPECIFIED DRAWING TEMPERATURE PACKAGE ORDERING TRANSPORT PRODUCT PACKAGE NUMBER (1) RANGE MARKING NUMBER (2) MEDIA ADS901E 28-Lead SSOP 324 –40 °C to +85°C ADS901E ADS901E Rail ADS901E 28-Lead SSOP 324 –40 °C to +85°C ADS901E ADS901E/1K Tape and Reel NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /1K indicates 1000 devices per reel). Ordering 1000 pieces of “ADS901E/1K” will get a single 1000- piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of Burr-Brown IC Data Book. PACKAGE/ORDERING INFORMATION

5 Clock Cycles

N–5 N–4 N–3 N–2 N–1 N N+1 N+2Data Out Clock Analog In N N+1 N+2 N+3 N+4 N+5 N+6 N+7 TOP VIEW SSOP PIN CONFIGURATION PIN DESIGNATOR DESCRIPTION 1+ V S Analog Supply 2L V DD Output Logic Driver Supply Voltage

3 Bit 10 Data Bit 10 (D0) (LSB)

4 Bit 9 Data Bit 9 (D1)

5 Bit 8 Data Bit 8 (D2)

6 Bit 7 Data Bit 7 (D3)

7 Bit 6 Data Bit 6 (D4)

8 Bit 5 Data Bit 5 (D5)

9 Bit 4 Data Bit 4 (D6)

10 Bit 3 Data Bit 3 (D7)

11 Bit 2 Data Bit 2 (D8)

12 Bit 1 Data Bit 1 (D9) (MSB)

13 GND Analog Ground

14 GND Analog Ground

15 CLK Convert Clock Input

16 OE Output Enable, Active Low

17 Pwrdn Power Down Pin

19 GND Analog Ground

20 GND Analog Ground

21 LpBy Positive Ladder Bypass

22 REFT Top Reference Input

23 NC No Connection

24 REFB Bottom Reference Input

25 LnBy Negative Ladder Bypass

26 CM Common-Mode Voltage Output

27 IN Analog Input

SYMBOL DESCRIPTION MIN TYP MAX UNITS tCONV Convert Clock Period 50 100 msn s tL Clock Pulse Low 24 25 ns tH Clock Pulse High 24 25 ns tD Aperture Delay 3 ns t1 Data Hold Time, CL = 0pF 3.9 ns t2 New Data Delay Time, CL = 15pF max 12 ns +V S LVDD (LSB) Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 (MSB) Bit 1 GND GND S IN CM LnBy REFB NC REFT LpBy GND GND S Pwrdn OE CLK ADS901

Frequency (MHz) –20 –40 –60 –80 –100 02468 1 0 Amplitude (dB) fIN = 9MHz SPECTRAL PERFORMANCE Frequency (MHz) –20 –40 –60 –80 –100 02468 1 0 Amplitude (dB) fIN = 500kHz DIFFERENTIAL LINEARITY ERROR Output Code 0 256 512 768 1024 DLE (LSB) fIN = 500kHz TYPICAL PERFORMANCE CURVES At TA = +25°C, VS = Logic VDD = +3V, REFB = 1V, REFT = 2V, Specified Input Range = 1V to 2V, Sampling Rate = 20MHz, unless otherwise specified. SPECTRAL PERFORMANCE Frequency (MHz) –20 –40 –60 –80 –100 02468 1 0 Amplitude (dB) fIN = 3.58MHz TWO-TONE INTERMODULATION Frequency (MHz) –20 –40 –60 –80 –100 0 2.5 5 7.5 10 Amplitude (dB) f1 = 4.5MHz f2 = 5.0MHz DIFFERENTIAL LINEARITY ERROR Output Code DLE (LSB) fIN = 9MHz 0 256 512 768 1024

Frequency (MHz) –20 –40 –60 –80 –100 –120 Amplitude (dB) fIN = 20MHz fS = 16MHz TYPICAL PERFORMANCE CURVES (CONT) At TA = +25°C, VS = Logic VDD = +3V, REFB = 1V, REFT = 2V, Specified Input Range = 1V to 2V, Sampling Rate = 20MHz, unless otherwise specified. INTEGRAL LINEARITY ERROR Output Code –10 ILE (LSB) fIN = 500kHz 0 256 512 768 1024 DIFFERENTIAL LINEARITY ERROR vs TEMPERATURE Temperature (°C) 0.9 0.8 0.7 0.6 –50 0 25–25 50 75 100 DLE (LSB) fIN = 9MHz fIN = 500kHz SWEPT POWER SFDR Input Amplitude (dBFS) 100 SFDR (dBc, dBFS) dBFS dBc SPURIOUS FREE DYNAMIC RANGE (SFDR) vs TEMPERATURE Temperature (°C) –50 0 25–25 50 75 100 SFDR (dBFS) fIN = 500kHz fIN = 9MHz DYNAMIC PERFORMANCE vs INPUT FREQUENCY Frequency (MHz) 0.1 1 10 SFDR (dBFS), SNR (dB) SNR SFDR

TYPICAL PERFORMANCE CURVES (CONT) At TA = +25°C, VS, Logic VDD = +3V, REFB = 1V, REFT = 2V, Specified Input Range = 1V to 2V, Sampling Rate = 20MHz, unless otherwise specified. POWER DISSIPATION vs TEMPERATURE Temperature (°C) –50 0 25–25 50 75 100 Power Dissipation (mW) OFFSET ERROR vs TEMPERATURE Temperature (°C) –50 0 25–25 50 75 100 Offset Error (% FS) 0.6 0.5 0.4 0.3 OUTPUT NOISE HISTOGRAM (DC Input) Output Code N-2 N-1 N+1 N N+2 Counts (x105) SIGNAL-TO-NOISE RATIO vs TEMPERATURE Temperature (°C) –50 0 25–25 50 75 100 SNR (dB) fIN = 9MHz fIN = 500kHz GAIN ERROR vs TEMPERATURE Temperature (°C) 2.8 2.7 2.6 2.5 2.4 –50 0 25–25 50 75 100 Gain Error (%FS) POWER DISSIPATION vs SAMPLING FREQUENCY Frequency (MHz) 1 10 100 Power Dissipation (mW)

neous current to internal nodes. FIGURE 5. Low Cost Solution to Supply External Reference Voltages and Recommended Reference Bypassing. advanced CMOS logic should be used (HC/HCT, AC/ACT). TABLE I. Coding Table for the ADS901.