HI20412 8-Bit, 50 MSPS, Video A/D Converter with Clamp Function November 1997 Features Description • Resolution . . . . . . . . . . . . . . . . . . 8-Bit ±0.5 LSB (DNL) The HI20412 is an 8-bit CMOS A/D Converter for video with synchronizing clamp function. The adoption of two-step parallel method achieves low power consumption and a maximum conversion rate of 50 MSPS. For pin compatible lower sample rate converters refer to HI21429JCQ (35 MSPS) or HI21426JCQ (20 MSPS) data sheets. • Maximum Sampling Frequency . . . . . . . . . . . 50 MSPS • Low Power Consumption . . . . . . . . . . . . . . . . . .125mW (Reference Current Excluded) • Built-In Input Clamp Function (DC Restore) • Clamp ON/OFF Function Ordering Information • Internal Voltage Reference PART NUMBER • Input CMOS/TTL Compatible • Three-State TTL Compatible Output TEMP. RANGE (oC) HI 20412JCQ • Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . +5V Single -40 to 85 or +5V/3.3V Dual Applications • Video Digitizing • Wireless Receivers • LCD Projectors/Panels • Cable Modems • RGB Graphics Processing • Camcorders • Instrumentation Pinout VREF VRBS CCP DVSS CLE OE DVSS NC HI 20412JCQ (MQFP) TOP VIEW 21 VIN D4 5 20 AVDD D5 6 19 AVDD D6 7 18 VRT D7 8 17 9 10 11 12 13 14 15 16 TEST AVDD AVSS CLP 22 4 NC 3 D3 NC D2 CLK AVSS TEST 32 31 30 29 28 27 26 25 1 24 2 23 DVDD D1 D0 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1 VRB VRTS PACKAGE PKG. NO. 32 Ld MQFP Q32.7x7-S HI20412 Functional Block Diagram DVSS 28 OE 30 REFERENCE SUPPLY 25 VRBS DVSS 31 24 VRB D0 (LSB) 1 23 AVSS D1 2 D2 3 D3 4 D4 5 D5 6 D6 7 D7 (MSB) 8 LOWER DATA LATCH LOWER ENCODER (4-BIT) LOWER SAMPLING COMPARATOR (4-BIT) 22 AVSS 21 VIN LOWER ENCODER (4-BIT) LOWER SAMPLING COMPARATOR (4-BIT) 20 AVDD 19 AVDD UPPER DATA LATCH UPPER ENCODER (4-BIT) 18 VRT UPPER SAMPLING COMPARATOR (4-BIT) 17 VRTS 16 AVDD DVDD 10 TEST (OPEN) 11 CLK 12 CLOCK GENERATOR -+ TEST (OPEN) 15 CLP 9 NC 32 D-FF 14 NC 13 NC 2 29 27 26 CLE CCP VREF HI20412 Absolute Maximum Ratings TA = 25oC Thermal Information Supply Voltage (VDD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Reference Voltage (VRT, VRB) . . . . . . . . . . . VDD +0.5 to VSS -0.5V Input Voltage (Analog) (VIN) . . . . . . . . . . . . . VDD +0.5 to VSS -0.5V Input Voltage (Digital) (VI). . . . . . . . . . . . . . . VDD +0.5 to VSS -0.5V Output Voltage (Digital) (VO) . . . . . . . . . . . . VDD +0.5 to VSS -0.5V Operating Conditions θJA (oC/W) Thermal Resistance (Typical, Note 1) MQFP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122 Maximum Junction Temperature (Plastic Package) . . . . . . . . 150oC Maximum Storage Temperature Range . . . . . . . . . .-55oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300oC (MQFP - Lead Tips Only) Supply Voltage (AVDD , AVSS). . . . . . . . . . . . . . . . . . 4.75 to 5.25V (DVDD , DVSS) . . . . . . . . . . . . . . . . . . . 3.0 to 5.5V (DVSS-AVSS) . . . . . . . . . . . . . . . . . 0 to 100mV Reference Input Voltage (VRB) . . . . . . . . . . . . . . . . . . . . . . . 0 and Above V (VRT) . . . . . . . . . . . . . . . . . . . . . 2.7 and Below V Analog Input (VIN) . . . . . . . . . . . . . . . . . . . . . . . 1.7VP-P Above Clock Pulse Width (tPW1 , tPW0). . . . . . . . . . . . . . . . . . . . 10ns (Min) Ambient Temperature (TOPR). . . . . . . . . . . . . . . . . . . -40oC to 85oC CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. NOTE: 1. θJA is measured with the component mounted on an evaluation PC board in free air. fC = 50 MSPS, AVDD = 5V, DVDD = 3 to 5.5V, VRB = 0.5V, VRT = 2.5V, TA = 25oC Electrical Specifications PARAMETER SYMBOL TEST CONDITIONS NOTES MIN TYP MAX UNITS 50 65 - MSPS - - 0.5 MSPS ANALOG CHARACTERISTICS Maximum Conversion Rate fC Max Minimum Conversion Rate fC Min Input Bandwidth Full Scale BW Differential Nonlinearity Error Integral Nonlinearity Error Offset Voltage ED AVDD = 4.75 to 5.25V, TA = 20 to 75oC, VIN = 0.5 to 2.5V, fIN = 1kHz Triangular Wave Envelope RIN = 33Ω 60 - MHz - 100 - MHz - ±0.3 0.5 LSB EL EOT Potential Difference to VRT EOB Potential Difference to VRB DG Differential Phase Error DP NTSC 40 IRE Mod Ramp fC = 14.3 MSPS Sampling Delay tSD Clamp Offset Voltage EOC Spurious Free Dynamic - -3dB End Point Differential Gain Error Signal-To-Noise Ratio -1dB SNR SFDR Note 2 - +0.7 1.5 LSB -70 -50 -30 mV 20 40 60 mV - 3 - % - 1.5 - Degrees - 0 - ns VREF = 0.5V 0 20 40 mV VREF = 2.5V 0 20 40 mV fIN = 100kHz - 45 - dB fIN = 500kHz - 44 - dB fIN = 1MHz - 44 - dB fIN = 3MHz - 43 - dB fIN = 10MHz - 38 - dB fIN = 25MHz - 32 - dB VIN = DC, CIN = 10µF tPCW = 2.75µs, fC = 14.3 MSPS, fCLP = 15.75kHz fIN = 100kHz - 51 - dB fIN = 500kHz - 46 - dB fIN = 1MHz - 49 - dB fIN = 3MHz - 46 - dB fIN = 10MHz - 45 - dB fIN = 25MHz - 45 - dB 3 HI20412 Electrical Specifications PARAMETER DC CHARACTERISTICS Supply Current fC = 50 MSPS, AVDD = 5V, DVDD = 3 to 5.5V, VRB = 0.5V, VRT = 2.5V, TA = 25oC (Continued) SYMBOL TEST CONDITIONS NOTES MIN TYP MAX UNITS fC = 50 MSPS, AVDD = 5V, DVDD = 5V or 3.3V, VRB = 0.5V, VRT = 2.5V, TA = 25oC IAD + IDD Analog IAD Digital IDD NTSC Ramp, Wave Input, CLE = 0V DVDD = 5V - 25 36 mA DVDD = 3.3V - 23 33 mA - 2 3 mA Reference Current IREF 4.1 5.4 7.7 mA Reference Resistance (VRT - VRB) RREF 260 370 480 Ω 0.52 0.56 0.60 V 1.80 1.92 2.04 V Self-Bias Voltage VRB VRT - VRB Input Capacitance Output Capacitance Digital Input Voltage CAI1 VIN , VIN = 1.5V + 0.07VRMS - 15 - pF CAI2 VRTS , VRT , VRB , VRBS , VREF - - 11 pF CDIN TEST, CLK, CLP, CLE, OE - - 11 pF CAO CCP - - 11 pF CDO D0 to D7, TEST - - 11 pF VIH AVDD = 4.75 to 5.25V, DVDD = 3 to 5.5V, TA = -20oC to 75oC 2.2 - - V - - 0.8 V CLK -240 - 240 µA TEST, CLP, CLE -240 - 40 µA OE -40 - 240 µA VIL Digital Input Current Digital Output Current Shorts VRTS and AVDD Shorts VRBS and AVSS IIH IIL IOH IOL IOH IOL IOZH IOZL VI = 0V to AVDD , TA = 20oC to 75oC OE = 0V, DVDD = 5V TA = 20oC to 75oC OE = 0V DVDD = 3.3V TA = -20oC to 75oC VOH = DVDD - 0.8V - - -2 mA VOL = 0.4V 4 - - mA VOH = DVDD - 0.8V OE = 3V DVDD = 3 to 5.5V TA = -20oC to 75oC - - -1.2 mA VOL = 0.4V 2.4 - - mA VOH = DVDD -40 - 40 µA VOL = 0V -40 - 40 µA 5.5 9.5 12.0 ns TIMING fC = 50 MSPS, AVDD = 5V, DVDD = 5V or 3.3V, VRB = 0.5V, VRT = 2.5V, TA = 25oC Output Data Delay tPZH tPHL CL = 15pF OE = 0V DVDD = 5V 8.5 DVDD = 3.3V tPLH 4.3 tPHL Three-State Output Enable Time tPZH tPZL RL = 1kΩ CL = 15pF OE = 3V➝0V DVDD = 5V 2.5 Clamp Pulse Width tPZH , tPZL tCPW 4.5 DVDD = 3.3V 3.0 7.0 8.0 DVDD = 5V 3.5 5.5 DVDD = 3.3V fC = 14.3MHz, CIN = 10µF for NTSC Wave Note 4 ns ns 9.0 ns 7.5 ns 5.0 RL = 1kΩ, CL = 15pF OE = 3V➝0V ns ns 6.0 tPZL tPHZ , tPLZ 16.3 7.6 tPZH Three-State Output Enable Time 11.8 ns ns 2.5 5.5 8.0 ns 1.75 2.75 3.75 µs NOTES: 2. The offset voltage EOB is a potential difference between VRB and a point of position where the voltage drops equivalent to 1/2 LSB of the voltage when the output data changes from “00000000” to “00000001”. EOT is a potential difference between VRT and a potential point where the voltage rises equivalent to 1/2 LSB of the voltage when the output data changes from “11111111” to “11111110”. 3. The voltage of up to (AVDD + 0.5V) can be input when DVDD = 3.3V. But the output pin voltage is less than the DVDD voltage. When the digital output is in the high impedance mode, the IC may be damaged by applying the voltage which is more than the (DVDD + 0.5V) voltage to the digital output. 4. The clamp pulse width is for NTSC as an example. Adjust the rate to the clamp pulse cycle (1/15.75kHz for NTSC) for other processing systems to equal the values for NTSC. 4 HI20412 Timing Diagrams tPW1 tPW0 CLOCK 1.3V ANALOG INPUT N DATA OUTPUT N-3 N+1 N+2 N+3 N+4 N-2 N-1 N N+1 = ANALOG SIGNAL SAMPLING POINT FIGURE 1A. TIMING CHART tr 4ns tf 4ns 3V 90% 1.3V CLOCK 10% 0V DATA OUTPUT 0.7 DVDD 0.3 DVDD tPLH, tPHL FIGURE 1B. TIMING CHART tr = 4.5ns tf = 4.5ns 3V 90% OE INPUT 1.3V 10% tPZL tPLZ 0V VOH 1.3V OUTPUT 1 10% VOL (≠DVSS) tPHZ tPZH VOH (≠DVDD) 90% 1.3V OUTPUT 2 VOL FIGURE 1C. TIMING CHART 5 HI20412 Timing Diagrams (Continued) VI (1) VI (2) VI (3) VI (4) ANALOG INPUT EXTERNAL CLOCK (1) UPPER COMPARATORS BLOCK (2) S (1) UPPER DATA C (1) S (2) MD (0) LOWER REFERENCE VOLTAGE (3) H (1) C (3) C (1) H (0) C (0) S (2) S (3) H (3) H (2) C (2) LD (0) OUT (-2) DIGITAL OUTPUT RV (3) C (3) LD (1) LD (-2) LOWER DATA B C (4) MD (3) RV (2) LD (-1) LOWER COMPARATORS B BLOCK S (4) MD (2) RV (1) S (1) LOWER DATA A S (3) MD (1) RV (0) LOWER COMPARATORS A BLOCK C (2) (4) OUT (-1) S (4) H (4) LD (2) OUT (0) OUT (1) FIGURE 1D. TIMING CHART II Pin Descriptions PIN NO. SYMBOL 1 to 8 D0 to D7 EQUIVALENT CIRCUIT DESCRIPTION D0 (LSB) to D7 (MSB) Output. DVDD DI DVSS 6 HI20412 Pin Descriptions PIN NO. SYMBOL 9 TEST (Continued) EQUIVALENT CIRCUIT DESCRIPTION Leave open for normal use. DVDD 9 DVSS 10 DVDD 11 TEST 15 Digital Power Supply +5V or +3.3V. Leave open for normal use. Pull-up resistor is built in. AVDD CLP Input for the clamp pulse. Clamps the signal voltage during low interval. Pull-up resistor is built in. 11 15 29 29 CLE The clamp function is enabled when CLE = Low. The clamp function is off and the device functions as a normal A/D converter when CLE = High. Pull-up resistor is built in. AVSS 12 CLK Clock Input. Set to Low level when no clock is input. AVDD 12 AVSS 13, 14, 32 NC 16, 19, 20 AVDD 17 VRTS 18 VRT 24 VRB 25 VRBS Analog Power Supply +5V. Generates approximately shorted with AVDD . AVDD when +0.6V when Reference Voltage (Top). Reference Voltage (Bottom). 17 RT 18 24 RREF 25 Generates approximately shorted with AVSS . RB AVSS 21 +2.5V VIN Analog Input. AVDD 21 AVSS 7 HI20412 Pin Descriptions PIN NO. SYMBOL 22, 23 AVSS 26 VREF (Continued) EQUIVALENT CIRCUIT DESCRIPTION Analog Ground. Clamp Reference Voltage Input. Clamps so that the reference voltage and the input signal during clamp interval are equal. AVDD 26 AVSS 27 CCP Integrates the clamp control voltage. The relationship between the changes in CCP voltage and in VIN voltage is positive phase. AVDD 27 AVSS 28, 31 DVSS 30 OE Digital Ground. Data is output when OE = Low. Pins D0 to D7 are at high impedance when OE = High. Pulldown resistor is built in. AVDD 30 AVSS Digital Output The following table shows the relationship between analog input voltage and digital output code. INPUT SIGNAL VOLTAGE VRT • • • • • • • • VRB STEP 0 • • • 127 128 • • • 255 DIGITAL OUTPUT CODE MSB LSB 1 1 1 1 1 1 1 1 • • • 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 • • • 0 0 0 0 0 0 0 0 8 HI20412 Electrical Specifications Measurement Circuits MEASUREMENT POINT RL MEASUREMENT POINT TO OUTPUT PIN DVDD TO OUTPUT PIN CL CL RL NOTE: CL includes capacitance of probes. FIGURE 2. OUTPUT DATA DELAY MEASUREMENT CIRCUIT FIGURE 3. THREE-STATE OUTPUT MEASUREMENT CIRCUIT +V S2 S1: ON IF A < B S2: ON IF B > A + S1 -V VIN A<BA>B COMPARATOR A8 B8 8 DUT HI20412 . . . . . . A1 A0 BUFFER B1 B0 “0” 8 “1” 000 . . . 00 TO 111 . . . 10 DVM 8 CLK (50 MSPS) CONTROLLER FIGURE 4. INTEGRAL NONLINEARITY ERROR/DIFFERENTIAL NONLINEARITY ERROR/OFFSET VOLTAGE TEST CIRCUIT HI90313 8 VIN NTSC SIGNAL SOURCE TTL 8 10-BIT D/A HI20412 100 40 IRE MODULATION ECL 2.5V IAE 620 -5.2V BURST VECTOR SCOPE CLK D.G. D.P. 0 -40 S.G. (CW) SYNC 0.5V 620 TTL fC -5.2V ECL FIGURE 5. DIFFERENTIAL GAIN ERROR, DIFFERENTIAL PHASE ERROR TEST CIRCUIT 9 HI20412 Electrical Specifications Measurement Circuits 2.5V 0.5V VDD VRT VIN VRB CLK OE GND (Continued) 2.5V IOL 0.5V + VOL VDD VRT VIN VRB CLK OE GND - IOH VOH + - FIGURE 6. DIGITAL OUTPUT CURRENT TEST CIRCUIT Operation Notes On Operation (See Block diagram and Timing Chart II) • The HI20412 is a two-step parallel system A/D converter • VDD , VSS featuring a 4-bit upper comparator block and two lower To reduce noise effects, separate the analog and digital comparator blocks of 4-bit each. The reference voltage systems close to the device. For both the digital and analog that is equal to the voltage between VRT - VRB/16 is VDD pins, use a ceramic capacitor of about 0.1µF set as constantly applied to the upper 4-bit comparator block. close as possible to the pin to bypass to the respective Voltage that corresponded to the upper data is fed through GNDs. the reference supply to the lower 4-bit comparator block. • Analog Input Voltage that corresponded to the upper data is fed through Compared with the flash type A/D converter, the input the reference supply to the lower 4-bit comparator block. capacitance of the analog input is rather small. However, it VRTS and VRBS pins serve for the self generation of VRT is necessary to conduct the drive with an amplifier featur(reference voltage top) and VRB (reference voltage boting sufficient band and drive capability. When driving with tom), and they are also used as the sense pins as shown an amplifier of low output impedance, parasitic oscillation in the Application Circuit examples Figures 10 and 11. may occur. That may be prevented by insetting a resistance of about 33Ω in series between the amplifier output • This IC uses an offset cancel type comparator which and A/D input. When the VIN signal of pin No. 21 is monioperates synchronously with an external clock. It features tored, the kickback noise of clock is. However, this has no the following operating modes which are respectively indieffect on the characteristics of A/D conversion. cated on the Timing Chart II with S, H, C symbols. That is input sampling (auto zero) mode, input hold mode and • Clock Input comparison mode. The clock line wiring should be as short as possible also, to avoid any interference with other signals, separate it • The operation of respective parts is as indicated in the from other circuits. Timing Chart II. For instance, input voltage VI (1) is sampled with the falling edge of the external clock (1) by • Reference Input means of the upper comparator block and the lower Voltage VRT to VRB is compatible with the dynamic range comparator A block. of the analog input. Bypassing VRT and VRB pins to GND, The upper comparator block finalizes comparison data MD by means of a capacitor about 0.1µF, stable characteris(1) with the rising edge of the external clock (2). tics are obtained. By shorting VDD and VRTS , VSS and Simultaneously the reference supply generates the lower VRBS respectively, the self-bias function that generates reference voltage RV (1) that corresponded to the upper VRT = about 2.5V and VRB = about 0.6V, is activated. results. The lower comparator A Block finalizes comparison data LD (1) with the rising edge of the external clock • Timing (3). MD (1) and LD (1) are combined and output as Out (1) Analog input is sampled with the falling edge of CLK and with the rising edge of the external clock (4). Accordingly output as digital data synchronized with a delay of 2.5 there is a 2.5 clock delay from the analog input sampling clocks and with the following rising edge. The delay from point to the digital data output. the clock rising edge to the data output is about 9ns (DVDD = 5V). • OE Pin Pins 1 to 8 (D0 to D7) are in the output mode by leaving OE open or connecting it to DVSS , and they are in the high impedance mode by connecting it to DVDD . 10 HI20412 Application Circuits ACO4 +5V (DIGITAL) CLOCK IN 0.1µ OPEN 16 CLAMP PULSE IN 0.01µ +5V (ANALOG) VIDEO IN 10µ 15 14 13 12 11 10 9 17 8 D7 18 7 D6 19 6 D5 20 5 D4 21 4 D3 22 3 D2 23 2 D1 24 1 D0 33Ω + 0.1µ 10P +5V (ANALOG) 0.01µ 25 26 27 28 29 30 31 32 VREF 0.01µ 20K GND (DIGITAL) GND (ANALOG) FIGURE 7. SINGLE +5V POWER SUPPLY WHEN CLAMP IS USED (SELF-BIAS USED) ACO4 +5V (DIGITAL) CLOCK IN 16 0.01µ +5V (ANALOG) VIDEO IN 0.1µ OPEN 10µ 15 14 13 12 11 10 9 17 8 18 7 19 6 20 5 21 4 22 3 23 2 24 1 33Ω + 10p 0.1µ 0.01µ 25 26 27 28 29 30 31 CLAMP LEVEL SETTING DATA SUBTRACTER • COMPARATOR • ETC. 32 GND (DIGITAL) DAC • PWM • ETC. GND (ANALOG) INFORMATION OTHER THAN THAT FOR CLAMP INTERVAL IS AT HIGH IMPEDANCE NOTES: 5. The relationship between the changes in CCP voltage (Pin 27) and in VIN voltage is positive phase. 6. ∆ VIN / ∆ VCCP = 3.0 (fS = 20 MSPS). FIGURE 8. SINGLE +5V POWER SUPPLY DIGITAL CLAMP (SELF-BIAS USED) 11 HI20412 Application Circuits (Continued) +5V (DIGITAL) ACO4 0.1µ CLOCK IN OPEN 16 +5V (ANALOG) 0.01µ VIDEO IN 15 14 13 12 11 10 9 17 8 D7 18 7 D6 19 6 D5 20 5 D4 21 4 D3 22 3 D2 23 2 D1 24 1 D0 33Ω 0.1µ 10p 0.01µ 25 26 27 28 29 30 31 32 GND (DIGITAL) GND (ANALOG) FIGURE 9. SINGLE +5V POWER SUPPLY WHEN CLAMP IS NOT USED (SELF-BIAS USED) +5V (DIGITAL) ACO4 0.1µ CLOCK IN OPEN 16 CLAMP PULSE IN VRT + 0.01µ 15 14 13 12 11 10 9 17 8 D7 18 7 D6 19 6 D5 20 5 D4 21 4 D3 22 3 D2 23 2 D1 24 1 D0 +5V (ANALOG) VIDEO IN 10µ 33Ω 10p 0.1µ 0.01µ VRB + 25 +5V (ANALOG) 26 VREF 27 28 29 30 31 32 0.01µ 20K GND (DIGITAL) GND (ANALOG) FIGURE 10. WHEN CLAMP IS USED (SELF-BIAS NOT USED) 12 HI20412 Application Circuits (Continued) +5V (DIGITAL) ACO4 0.1µ CLOCK IN OPEN 16 - 15 14 13 12 11 10 9 17 8 D7 18 7 D6 19 6 D5 20 5 D4 21 4 D3 22 3 D2 23 2 D1 24 1 D0 + VRT 0.01µ +5V (ANALOG) VIDEO IN 33Ω 0.1µ 10p 0.01µ - VRB + 25 26 27 28 29 30 31 32 GND (DIGITAL) GND (ANALOG) FIGURE 11. SINGLE +5V POWER SUPPLY WHEN CLAMP IS NOT USED (SELF-BIAS NOT USED) +3.3V (DIGITAL) ACO4 0.1µ CLOCK IN OPEN 16 CLAMP PULSE IN 0.01µ +5V (ANALOG) VIDEO IN 10µ 15 14 13 12 11 10 9 17 8 D7 18 7 D6 19 6 D5 20 5 D4 21 4 D3 22 3 D2 23 2 D1 24 1 D0 33Ω + 10p 0.1µ +5V (ANALOG) 0.01µ 25 26 VREF 27 28 29 30 31 32 0.01µ 20K GND DIGITAL GND (ANALOG) FIGURE 12. DUAL +5V/+3.3V POWER SUPPLY WHEN CLAMP IS USED (SELF-BIAS USED) 13 HI20412 Typical Performance Curves fC = 50 MSPS NTSC RAMP WAVE INPUT AVDD = DVDD = 5V SUPPLY CURRENT (mA) SUPPLY VOLTAGE (mA) fC = 50 MSPS 26 25 24 -20 0 25 50 NTSC RAMP WAVE INPUT AVDD = DVDD 27 TA = 25oC 25 23 75 4.75 5 SUPPLY VOLTAGE (V) AMBIENT TEMPERATURE (oC) FIGURE 14. SUPPLY VOLTAGE vs SUPPLY CURRENT 25 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) FIGURE 13. AMBIENT TEMPERATURE vs SUPPLY CURRENT 20 NTSC RAMP WAVE INPUT AVDD = DVDD = 5V 15 5.25 fC = 50 MSPS SINE WAVE 1.9VP-P AVDD = DVDD = 5V 35 TA = 25oC 30 25 TA = 25oC 10 20 30 40 0.01 50 0.1 SAMPLING FREQUENCY (MSPS) fC = 50 MSPS fIN = 1kHz, TRIANGULAR WAVE INPUT AVDD = DVDD = 5V 65 60 -20 0 25 50 10 25 FIGURE 16. INPUT FREQUENCY vs SUPPLY CURRENT MAXIMUM OPERATING RATE (MSPS) MAXIMUM OPERATING RATE (MSPS) FIGURE 15. SAMPLING FREQUENCY vs SUPPLY CURRENT 70 1 INPUT FREQUENCY (MHz) 75 67 fC = 50 MSPS NTSC RAMP WAVE INPUT AVDD = DVDD 65 63 4.75 AMBIENT TEMPERATURE (oC) 5 5.25 SUPPLY VOLTAGE (V) FIGURE 17. AMBIENT TEMPERATURE vs MAXIMUM OPERATING FREQUENCY FIGURE 18. SUPPLY VOLTAGE vs MAXIMUM OPERATING FREQUENCY 14 HI20412 Typical Performance Curves (Continued) AVDD = DVDD = 5V 1 0 OUTPUT LEVEL (dB) SAMPLING DELAY (ns) fC = 50 MSPS 0 -1 -1 fC = 50 MSPS SINE WAVE 1VP-P INPUT AVDD = DVDD = 5V -3 TA = 25oC -20 0 25 50 75 0.1 1 AMBIENT TEMPERATURE (oC) 10 100 ANALOG INPUT FREQUENCY (MHz) FIGURE 19. AMBIENT TEMPERATURE vs SAMPLING DELAY FIGURE 20. FULL SCALE INPUT BANDWIDTH 60 fC = 50 MSPS AVDD = DVDD = 5V VIN = 2VP-P TA = 25oC 8 50 40 6 SFDR (dB) 7 ENOB SNR (dB) 50 fC = 50 MSPS AVDD = DVDD = 5V VIN = 2VP-P TA = 25oC 40 5 30 30 0.01 0.1 1 0.01 10 0.1 1 10 ANALOG INPUT FREQUENCY (MHz) ANALOG INPUT FREQUENCY (MHz) FIGURE 22. ANALOG INPUT FREQUENCY vs SFDR FIGURE 21. ANALOG INPUT FREQUENCY vs SNR, EFFECTIVE NUMBER OF BITS (ENOB) 12 10 fC = 10 MSPS 12 CL = 15pF OUTPUT DATA DELAY (ns) OUTPUT DATA DELAY (ns) fC = 10 MSPS AVDD = DVDD = 5V tPLH 8 tPHL 6 AVDD = 5V DVDD = 3.3V CL = 15pF tPLH 10 8 tPHL 6 -20 0 25 50 75 -20 AMBIENT TEMPERATURE (oC) 0 25 50 75 AMBIENT TEMPERATURE (oC) FIGURE 23. AMBIENT TEMPERATURE vs OUTPUT DATA DELAY 15 FIGURE 24. AMBIENT TEMPERATURE vs OUTPUT DATA DELAY HI20412 Typical Performance Curves (Continued) 14 TA = 25oC 12 OUTPUT DATA DELAY (ns) OUTPUT DATA DELAY (ns) fC = 10 MSPS AVDD = DVDD = 5V tPLH 10 tPHL 8 6 fC = 10 MSPS AVDD = 5V DVDD = 3.3V 12 TA = 25oC tPLH 10 8 tPHL 6 0 5 10 15 20 25 0 5 10 LOAD CAPACITANCE (pF) OUTPUT DATA DELAY (ns) 20 25 LOAD CAPACITANCE (pF) FIGURE 25. LOAD CAPACITANCE vs OUTPUT DATA DELAY FIGURE 26. LOAD CAPACITANCE vs OUTPUT DATA DELAY fC = 10 MSPS AVDD = 5V CL = pF TA = 25oC 12 tPLH 10 8 tPHL 6 3 15 3.5 4.5 5 5.5 DVDD SUPPLY VOLTAGE (V) FIGURE 27. DVDD SUPPLY VOLTAGE vs OUTPUT DATA DELAY 16 HI20412 Sales Office Headquarters ASIA Intersil (china) Ltd. china mainland TEL : (86) 13723742298 All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification. Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. 17