ANALOG DEVICES High Speed 6-Bit A/D Converter AD9000 FEATURES TIMSPS Encode Rate Bipolar Input Range Low Error Rate Overflow Bit MIL-STD-883 Compliant Versions Available APPLICATIONS QAM Telecommunications anatoa INPUT Electronic Warfare (ECM, ECCM, ESM) Radar Guidance Digitizers ANALOG {TIE TO. PIN 18) GENERAL DESCRIPTION The AD9000 is a 6-bit, high speed, analog-to-digital converter with ECL compatible outputs and a bipolar input stage. The AD9000 is fabricated in a high-performance bipolar process which allows encode rates up to 77MSPS. The AD9000 employs the standard flash converter architecture based on 64 individual comparators which simultancously deter- mine the precise analog signal level. The comparators are followed by two stages of decoding logic, allowing the AD9000 to operate with a very low error rate. The low 35pF input capacitance of the AD9000 greatly simplifies the analog driver stage. Also incorporated into the AD9000 design is an overflow output bit as well as a hysteresis control pin to modify comparator sensitivity. ORDERING GUIDE FUNCTIONAL BLOCK DIAGRAM +Vnae +Vs S OVERFLOW Ce 4 e Re --~--H Le) e 187 2No +25 nse ~ mez ------- encooen | | enconen ~ ) ort 2 COMPARATOR LaTon ourur |_25 STAGES. ho stages [] NO Fey OF Pm Srices. \ 1 1 1} BIT 4 to pee eee ' (70) BIT S 3 a po 4 or) 2 a ----- 4 fe) DIGITAL GROUND I i-} AD9000 $ @) @) Veer Va ENCODE -Vs The AD9000 is offered as both an commercial temperature range device 0 to + 70C, and as an extended temperature range device 55C to + 125C. Both versions are available packaged in a 16-pin ceramic DIP. The extended temperature range device is also available in a 28-pin ceramic LCC package. The extended temperature range versions are offered as fully compliant MIL- STD-883 Class B devices. PIN DESIGNATIONS A vs Gi] e [16] vicirat. rouno anatoccrouno [2 | 15] OVERFLOW w GB] 14) arr simsey ENCODE (4 Al 13} Bivz TOP VIEW ~ Veer G (Not to Scale} [72] Biv3 an | 6 mo Bits +Vs ET 10] BTS +Vner [8 [3 Jerrsise; Temperature Package Model" Range Description Option AD9000JD Oto +70C 16-Pin DIP, Industrial D-16 AD9000SD 55Cto +125C | 16-Pin DIP D-16 AD9000SE 55C to +125C | 28-Pin LCC E-28A 25 OVERFLOW NOTES 'MIL-STD-883 versions available, contact factory. 2D = Ceramic DIP; E = Leadless Ceramic Chip Carrier. For outline information see Package Information section. This is an abridged data sheet. To obtain the most recent version or complete data sheet, call our fax retrieval system at 1-800-446-6212. REV. A 24 BIT 1 (mse) 23 BT 2 22 BIT 27 era 20 Ors TOP ViEW (Not to Scale} 19 BIT 6 LSB} 1213 14 18 16 17 18 223s 422 NC = NO CONNECT + Vines ANALOG-TO-DIGITAL CONVERTERS 2-399AD9000 SPECIFICATIONS (Supply Voltages = 5.2V and +-5.0V; Differential Reference Voltage = 2.0V ELECTRICAL CHARACTERISTICS ness cthervie sate Commercial Military Oto +70C 55C to + 125C AD9000JD AD9000SD/SE Parameter Temp | Min Typ Max | Min Typ Max | Units RESOLUTION 6 6 | Bits . DC ACCURACY Differential Linearity +25C 0.25 0.5 0.25 0.5 LSB Full 1.0 1.0 - LSB" Integral Linearity +25C 0.25 0.5 0.25 0.5 LSB Full 1.0 1.0 LSB" No Missing Codes Full GUARANTEED GUARANTEED INITIAL OFFSET ERROR Le Top of Reference Ladder +25C 0.3 718 0.3 7/8 LSB Full 1.5 15 LSB Bottom of Reference Ladder +25C 0.25 718 0.25 7/8 LSB Full 1.5 1.5 LSB Offset Drift Coefficient Full 145 145 pV/PC ANALOG INPUT Input Voltage Range Full 2.0V +2.0V Vv Input Bias Current (Sampling) Full 800 800 pA Input Bias Current (Latched)* Full 20 20 | pA Input Resistance +25C 3.0 3.0 ka Input Capacitance +25C 35 50 35 50 pF | Full Power Bandwidth +25C 20 20 MHz REFERENCE INPUT? Reference Ladder Resistance +25C | 80 200 80 200 n Ladder Temperature Coefficient : 0.275 0.275 arc Reference Input Bandwidth + 25C 20 20 MHz DYNAMIC PERFORMANCE Conversion Rate +25C | 50 70 75 77 MHz Conversion Time (+ 1 Clock) + 25C 20 13.3 ns Aperture Delay (tp) +25C 2 2 ns Aperture Uncertainty (Jitter) + 25C 25 25 . ps- Output Propagation Delay (tpp)* +25C | 8 12 8 12 ns Output Hold Time (toy) +25C | 8 14 8 14 ns Transient Response! +25C 13 13 ns Overvoltage Recovery Time?! +25C 1 11 ns Output Rise Time? +25C 5.0 4.5 ns Output Fall Time! . +25C 5.0 4.5 ns Output Time Skew +25C 0.4 0.4 ns ENCODE INPUT Logic 1 Voltage Full -11 -11 v Logic 0 Voltage Full ~-15 -15 | V Logic 1 Current Full 100 100 nA Logic 0 Current Full 100 100 BA Input Capacitance + 25C 2.5 5.0 2.5 5.0 pF ENCODE Pulse Width High (tpwi) +25C | 6.6 6.6 ns ENCODE Pulse Width Low (tpw1) +25C | 6.6 6.6 ps 2-400 ANALOG-TO-DIGITAL' CONVERTERS REV. AELECTRICAL CHARACTERISTICS (continued ADS000 Commercial Military Oto + 70C 55C to + 125C AD9000JD AD9000SD/SE Parameter Temp Min Typ Max Min Typ Max Units AC LINEARITY Dynamic Linearity! + 25C 0.5 0.5 LSB In-Band Harmonics (DC to 1MHz) +25C 4 44 dBc (1MHz to 5MHz) + 25C 42 42 dBc (SMHz to 8MHz) + 25C 38 38 dBc Signal to Noise Ratio? +25C | 31 33 31 33 dB Signal to Noise Ratio!* +25C | 40 42 40 42 dB Two Tone Intermodulation Rejection!> | + 25C 46 46 dBc Noise Power Ratio (NPR)! + 25C 30 30 dBc DIGITAL OUTPUTS Logic 1 Voltage Full ~il -hl Vv Logic 0 Voltage Full 1.5 -15 | Vv POWER SUPPLY Positive Supply Current (+ 5.0V) + 25C 60 70 60 70 mA Full 75 75 mA Negative Supply Current ( 5.2V) + 25C 68 80 68 80 mA Full 85 85 mA Nominal Power Dissipation + 25C 675 675 mW Reference Ladder Dissipation +25C 20 20 mW NOTES "Aw = + Vrge- Measured on Bit 1 (MSB) only. Determined by 3dB reduction in reconstructed output at 75MSPS. 3Under normal operating conditions, the analog input voltages should not exceed nominal +2V operating range, nor the supply voltages (+Vs and V5), whichever is smaller. Under normal operating conditions the differential reference voltage may range from +0.5V to +2V; + Vaer> Vrer- Output terminated with 1002. resistors to 2.0V. Measured from the leading edge of ENCODE to data out on Bit 1 (MSB). Measured from the trailing edge of ENCODE to data out on Bit 1 (MSB). For full-scale step input, 6-bit accuracy is attained in specified time. *Recovers to 6-bit accuracy in specified time, after 150% full-scale input overvoltage. ABSOLUTE MAXIMUM RATINGS! Positive Supply Voltage... 2... 0.00202. 0.3V to +6V Negative Supply Voltage .........~. 6.0V to +0.3V Analog-to-Digital Ground Voltage Differential ...... . 0.5 Analog Input Voltages (Ain, + Vrer, VrerY..-.-. - - +3 Differential Reference Voltage (+ Vpur to Varp) ... 6V ENCODE Input Voltage ..........0.. Vs to OV HYSTERESIS Control Voltage... 2.2... OV to +3.0V Digital Output Current... 2. 20mA Power Dissipation (+ 25C Free Air)t. 2... 0... 745mW Operating Temperature Range AD900JD ................... Oto +70C ADO0SD/SE .............. 55C to + 125C Storage Temperature Range. ........ 65C to + 150C Junction Temperature... 2... 0.000.002. +175C Lead Soldering Temperature (10sec) REV. A "Measured at SOMSPS encode rate. Analog input frequency = 15MHz. RMS signal to RMS noise, with 540kHz analog input signal. Peak-to-peak signal to rms noise, with 540kHz analog input signal. 5, =9.3MHz; f, =7.6MHz; Encode = 42MHz. SDC to 8.2MHz noise bandwidth with 3.886MHz slot. Supply voltage should remain stable within +5% for normal operation. Specifications subject to change without notice. NOTES Absolute maximum ratings are limiting values, to be applied individually, and beyond which serviceability of the circuit may be impaired. Functional operability under any of these conditions is not necessarily implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. 2Under normal operating conditions, the analog input voltages should not exceed nominal + 2V operating range, nor the supply voltages (+Vs5 and Vs), whichever is smaller. Under normal operating conditions the differential reference voltage may range from +0.5V to +2V; + Vper> Vrer- Typical thermal impedances . . . 16-Pin Ceramic 9,. = 67C/W; 8,.= 77C 28-Pin LCC 8, =62C/W; 8. = 14C/W ANALOG-TO-DIGITAL CONVERTERS 2-401