8BIT 125MSPS ADC adc1390x adc1390x 8BIT 125MSPS ADC GENERAL DESCRIPTION FEATURES The adc1390x is a CMOS 8-bit A/D converter for high performance network applications. It is a Folding, Interpolation and Pipelined architecture. The maximum conversion rate of adc1390x is 125MSPS and supply voltage is 3.3V single. - TYPICAL APPLICATIONS Resolution : 8Bit Differential Linearity Error : ±1.0 LSB Integral Linearity Error : ±2.0 LSB Maximum Conversion Rate : 125MSPS Folding, Interpolation and Pipelined Scheme Power Consumption : 258mW(Typ) Power Supply : 3.3V Single Operation Temperature Range : -40ºC ~85ºC - Giga-bit Ethernet Phy, magnetic recording sampling detectors, medical imagers, and digital transmission links for telephone, cable, and terrestrial networks FUNCTIONAL BLOCK DIAGRAM VADD33A VASS33A VABB33A AINT AINC preamps fold1 fold2 lsb5b REFT 3brom REFB PD ITEST 3brom mbias msb5b dclogic ckgen CLK VADD33D VASS33D VABB33D DO[7:0] Ver 1.0 (Mar. 2002) This datasheet is a preliminary version. No responsibility is assumed by SEC for its use nor for any infringements of patents or other rights of third parties that may result from its use. The content of this datasheet is subject to change without any notice SEC ASIC 1 / 8 Analog Core 8BIT 125MSPS ADC adc1390x CORE PIN DESCRIPTION NAME I/O TYPE I/O PAD PIN DESCRIPTION AINT AI phia_abb Analog Input + AINC AI phia_abb Analog Input - REFT AI phia_abb Reference Top (2.1V) REFB AI phia_abb Reference Bottom(1.2V) ITEST AO phoa_abb Current Test CLK DI phicc_abb Clock Input PD DI phicc_abb Power Down ( Active High ) DO[7] DO phob8_abb Digital Output (MSB) DO[6:0] DO phob8_abb Digital Output (LSB) VADD33A AP vdd33th_abb Analog Power (3.3V) VASS33A AG vssth_abb Analog Ground VABB33A AG vbbh_abb Analog Sub Bias VADD33D DP vdd33th_abb VASS33D DG vssth_abb Digital Ground VABB33D DG vbbh_abb Digital Sub Bias I/O TYPE - AI : Analog Input DI : Digital Input AO : Analog Output DO : Digital Output AB : Analog Bidirectional DB : Digital Bidirectional - AP DP AG DG : : : : Analog Power Digital Power Analog Ground Digital Ground Digital Power (3.3V) CORE CONFIGURATION VADD33A VABB33A VASS33A AINT AINC REFT REFB adc1390x CLK PD DO[7:0] VASS33D VADD33D VABB33D ITEST SEC ASIC 2 / 8 Analog Core 8BIT 125MSPS ADC adc1390x ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Value Unit Supply Voltage VADD33A 4.5 V Analog Input Voltage AINT,AINC VASS33A to VADD33A V Digital Input Voltage CLK VASS33A to VADD33A V VOH , VOL VASS33A to VADD33A V -45 to 150 ºC Digital Output Voltage Storage Temperature Range Tstg NOTES 1. ABSOLUTE MAXIMUM RATING specifies the values beyond which the device may be damaged permanently. Exposure to ABSOLUTE MAXIMUM RATING conditions for extended periods may affect reliability. Each condition value is applied with the other values kept within the following operating conditions and function operation under any of these conditions is not implied. 2. All voltages are measured with respect to VASS33A unless otherwise specified. 3. 100pF capacitor is discharged through a 1.5KΩ resistor (Human body model) RECOMMENDED OPERATING CONDITIONS Symbol Min Typ Max Unit Supply Voltage VADD33A - VASS33A VADD33A - VASS33A 3.15 3.3 3.45 V Supply Voltage Difference VADD33A - VADD33D -0.1 0.0 0.1 V REFT REFB - 2.1 1.2 - V Analog Input Voltage VIN(AINT-AINC) - 1.2 Operating Temperature Topr -40 - Characteristics Reference Input Voltage(Externally) Vp-p 85 ºC NOTES 1. It is strongly recommended that all the supply pins (VADD33A, VADD33D) be powered from the same source to avoid power latch-up. SEC ASIC 3 / 8 Analog Core 8BIT 125MSPS ADC DC adc1390x ELECTRICAL CHARACTERISTICS Symbol Min Typ Max Unit - - - 8 Bits Reference Current IREF - 2 3 mA Differential Linearity Error DLE - - ±1.0 LSB AINT : 1.35V ~ 1.95V AINC : 1.95V ~ 1.35V (Ramp Input) Integral Linearity Error ILE - - ±2.0 LSB Fck : 1MHz Bottom Offset Voltage Error EOB - - 10 LSB Top Offset Voltage Error EOT - - 10 LSB Unit Characteristics Resolution Conditions - NOTES 1. Converter Specifications (unless otherwise specified) VADD33A=3.3V VADD33D=3.3V VASS33A=GND VASS33D=GND Ta=25ºC AC ELECTRICAL CHARACTERISTICS Characteristics Symbol Min Typ Max Maximum Conversion Rate fc - - 125 Dynamic Supply Current Ivdd - 80 90 mA fc=125MHz (without system load) Signal-to-Noise Distortion Ratio SNDR 42 44 - dB AINT,AINC = 5MHz fc = 125MHz Signal-to-Noise Distortion Ratio SNDR 30 42 - dB AINT,AINC = 62.5MHz fc = 125MHz SEC ASIC 4 / 8 Conditions MSPS source resolution > 12bit Analog Core 8BIT 125MSPS ADC adc1390x Timing Diagram AIN(AINT-AINC) D1 2 D2 D3 D4 D5 ADC Clock (125MHz) (125MHz) D1 ADC Out Data Latency : 20.9nsec SEC ASIC D2 D3 D4 D5 D5 0.9 0.9nsec 5 / 8 Analog Core 8BIT 125MSPS ADC CORE EVALUATION adc1390x GUIDE 1. ADC function is evaluated by external check on the bidirectional pads connected to input nodes of HOST DSP back-end circuit. 2. The reference voltages may be biased internally through resistor divider. AINT AINC 2.1V 1.2V REFT REFB NOTES : 10uF Electronic Capacitor unless Otherwise Specified : 0.1uF Ceramic Capacitor unless Otherwise Specified Digital Mux Power Used :VADD33A,VASS33A,VABB33A VADD33D,VASS33D,VABB33D adc1390x DO[7:0] HOST DSP CORE DO[7:0] CLK PD DO[7:0] Bidirectional PAD (ADC Function Test & externally forced Digital Input) SEC ASIC 6 / 8 Analog Core 8BIT 125MSPS ADC adc1390x PHANTOM CELL INFORMATION - Pins of the core can be assigned externally (Package pins) or internally (internal ports) depending on design methods. The term "External" implies that the pins should be assigned externally like power pins. The term "External/internal" implies that the applications of these pins depend on the user. REFB REFT AVDD33A AVDD33A AVDD33A AVBB33A AVBB33A AVSS33A Pin Name Pin Usage Pin Layout Guide AVDD33A External - Maintain the large width of lines as AVSS33A External AVBB33A External AVDD33D External AVSS33D AVSS33A AVSS33A External - place the port positions to minimize the length of power lines. - Do not merge the analog powers with anoter power from other blocks. AVBB33D External - Use good power and ground source on board. INP adc1390x INN INP External/Internal - Do not overlap with digtal lines. INN External/Internal - Maintain the shotest path to pads. REFB External/Internal - Maintain the larger width and the shorter length as far as the pads. External/Internal - Separate from all other digital lines. CLK External/Internal - Separate from all other analog signals REFT ITEST SEC ASIC DO[6] DO[7] DO[4] DO[5] DO[3] DO[0] DO[1] DO[2] VABB33D VABB33D VADD33D PD CLK far as the pads. PD External/Internal DO[7] External/Internal DO[6] External/Internal DO[5] External/Internal DO[4] External/Internal DO[3] External/Internal DO[2] External/Internal DO[1] External/Internal DO[0] External/Internal 7 / 8 - Separated from the analog clean signals if possible. - Do not exceed the length by 1,000um. Analog Core 8BIT 125MSPS ADC FEEDBACK adc1390x REQUEST It should be quite helpful to our ADC core development if you specify your system requirements on ADC in the following characteristic checking table and fill out the additional questions. We appreciate your interest in our products. Thank you very much. Characteristic Min Typ Max Unit Analog Power Supply Voltage V Digital Power Supply Voltage V Bit Resolution Bit Reference Input Voltage V Analog Input Voltage Vpp Operating Temperature ºC Integral Non-linearity Error LSB Differential Non-linearity Error LSB Bottom Offset Voltage Error mV Top Offset Voltage Error mV Maximum Conversion Rate Remarks MSPS Dynamic Supply Current mA Power Dissipation mW Signal-to-noise Ratio dB Pipeline Delay CLK Digital Output Format (Provide detailed description & timing diagram) 1. Between single input-output and differential input-output configurations, which one is suitable for your system and why? 2. Please comment on the internal/external pin configurations you want our ADC to have, if you have any reason to prefer some type of configuration. 3. Freely list those functions you want to be implemented in our ADC, if you have any. SEC ASIC 8 / 8 Analog Core