BW1238X BW1238X CMOS 6-Bit converter digital video disk (DVD) par

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BW1238X BW1238X CMOS 6-Bit converter digital video disk (DVD) par

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0.35µm 6-BIT 250MSPS
BW1238X
BW1238X CMOS 6-Bit converter digital video disk (DVD) partial-response maximum likelihood (PRML) system. flash type converter which consists input buffer, comparator array, digital backend encoder, output buffer. maximum conversion rate BW1238X over 250MSPS supply voltage 3.3V single.
TYPICAL APPLICATIONS
Multi-media applications Digital video disk (DVD) system Digital broadcast satellite (DBS) receiver Quadrature phase shift keying (QPSK) demodulator Video applications
FEATURES
Resolution 6Bit Differential Linearity Error ±1.0 Integral Linearity Error ±1.0 Maximum Conversion Rate 250MSPS Digital Output CMOS Level Power Consumption 260mW Power Supply 3.3V Single
BW1238X
0.35µm 6-BIT 250MSPS
FUNCTIONAL BLOCK DIAGRAM
REFBOT
REFTOP
VDDD VSSD
VDDA
VSSA VBBA
Level Generator
4-bit Block 4-bit Block 4-bit Block 4-bit Block
Block
AINT INCOM
Input Buffer
Comparator Array
FNAND Array
Flip/ Flop Array
Flip/ Flop Array Output Buffer DO[5:0]
ITEST SPEEDUP
Bias Current Generator
CLKIN
Clock Generator
0.35µm 6-BIT 250MSPS
BW1238X
CORE DESCRIPTION
Name REFTOP REFBOT VDDA VBBA VSSA AINT INCOM SPEEDUP ITEST CLKIN DO[5:0] VSSD VDDD Type Abbr. Analog Input Digital Input Analog Output Digital Output Analog Bidirectional Digital Bidirectional Analog Power Digital Power Analog Ground Digital Ground Type pia_bb pia_bb pia_bb vdda vbba vssa piar10_bb pia_bb piar10_bb piar10_bb piar50_bb poa_bb vssd vddd Description Reference Bias (2.0V) Reference Bottom Bias (1.0V) Internal Bias Point (open=use internal bias circuit) Analog Power (3.3V) Analog Bias Analog Ground Analog Input Input Span 0.5~2.5 Internal Bias Point (open=use internal bias circuit) Speed test (normally, VDDA) Internal Bias Point (open=use internal bias circuit) Clock Input Digital Output Digital Ground Digital Power (3.3V)
BW1238X
0.35µm 6-BIT 250MSPS
CORE CONFIGURATION
VDDD
VDDA
AINT
bw1238x
VSSD
VSSA
VBBA
DO[5:0]
CLKIN
REFTOP
INCOM
REFBOT
ITEST
SPEEDUP
0.35µm 6-BIT 250MSPS
BW1238X
ABSOLUTE MAXIMUM RATINGS Characteristics Supply Voltage Analog Input Voltage Digital Input Voltage Digital Output Voltage Reference Voltage Storage Temperature Range Symbol AINT CLKIN VOH, REFTOP/REFBOT Tstg Value 2.0/1.0 Unit
NOTE: ABSOLUTE MAXIMUM RATING specifies values beyond which device damaged permanently. Exposure ABSOLUTE MAXIMUM RATING conditions extended periods affect reliability. Each condition value applied with other values kept within following operating conditions function operation under these conditions implied. voltages measured with respect unless otherwise specified. 100pF capacitor discharged through 1.5KW resistor (Human body model).
OPERATING CONDITIONS Characteristics Supply Voltage Supply Voltage Difference Reference Input Voltage Analog Input Voltage Digital Input Voltage Digital Input Voltage Operating Temperature Symbol VDDA VSSA VDDD VSSD VDDA VDDD REFTOP REFBOT AINT Topr 3.15 -0.1 3.45 Unit
NOTE: strongly recommended that supply pins (VDDA, VDDD, VDDO) powered from same source avoid power latch-up.
BW1238X
0.35µm 6-BIT 250MSPS
ELECTRICAL CHARACTERISTICS Characteristics Resolution Reference Current Differential Linearity Error Integral Linearity Error Offset Error Voltage Gain Error Voltage Symbol IREF GAIN 0.80 -1.00 -1.00 0.91 0.29 0.42 0.24 -1.83 1.00 1.00 1.00 Unit Bits Conditions REFTOP: 2.0V REFBOT: 1.0V AINT 0.5V 2.5V (Ramp Input) 250MHz
NOTES: Converter Specifications (unless otherwise specified) VDDA=3.3V VDDD=3.3V VBBA=0.0V VSSA=0.0V VSSD=0.0V REFTOP=2.0V REFBOT=1.0V Ta=25°C Determined
ELECTRICAL CHARACTERISTICS Characteristics Conversion Rate Clock Time Conversion Rate Dynamic Supply Current Digital Output Data Delay Signal Noise Distortion Ratio Symbol Tpwl SNDR 69.0 31.6 72.6 34.8 76.0 37.2 Unit MSPS MSPS I(VDDA) I(VDDD) 250MHz "DELAY TIMING DIAGRAM" AINT 40MHz (Sine Input) 250MHz Conditions
0.35µm 6-BIT 250MSPS
BW1238X
CHART Index AINT Input 0.50000 0.53125 0.53125 0.56250 0.56250 0.59375 1.46875 1.50000 1.50000 1.53125 1.53125 1.56250 2.40625 2.43750 2.43750 2.46875 2.46875 2.50000 Digital Output 000000 000001 000010 011111 100000 100001 111101 111110 111111 1LSB=31.25mV single input REFTOP=2.5V REFBOT=0.5V
BW1238X
0.35µm 6-BIT 250MSPS
DELAY TIMING DIAGRAM
AIN(1)
AIN(2)
AIN(3)
AINT
CLKIN
(-1)
Signal Delay
BW1238X
function evaluated external check bidirectional pads connected input nodes HOST back-end circuit.
NOTES 3.3V VSSA 3.3V VSSD
reference voltages should biased externally through REFTOP REFBOT pins.
CERAMIC CAPACITOR UNLESS OTHERWISE SPECIFIED 0.1uF CERAMIC CAPACITOR UNLESS OTHERWISE SPECIFIED 10uF CERAMIC CAPACITOR UNLESS OTHERWISE SPECIFIED
VDDA
VBBA
VSSA
VDDD
VSSD
6-bit Digital Output Analog Input AINT
bw1238x
DO[5:0]
ANALOG
HOST
Clock Input
CORE REFBOT REFTOP CLKIN SPEEDUP
INCOM
ITEST
BIDIRECTIONAL
CORE EVALUATION GUIDE
0.35µm 6-BIT 250MSPS
VSSA 2.0V Reference 1.0V Bottom Reference
VSSA
VDDA
Function Measuring Digital Input Forcing
BW1238X
0.35µm 6-BIT 250MSPS
PACKAGE CONFIGURATION
2.0V
0.1u 0.1u
0.1u 0.1u
REFTOP REFTOP REFBOT REFBOT VDDA VDDA VBBA VSSA VSSA AINT INCOM SPEEDUP ITEST VDDO VSSO CLKIN
VDDD VDDD VSSD VSSD DO[5] DO[4] DO[3] DO[2] DO[1] DO[0]
0.1u
3.3V
1.0V
3.3V 0.1u 0.1u Analog input
bw1238x_top
output
3.3V
3.3V Clock
0.1u
3.3V
Test bias forcing, Remain floating
NOTE: denotes Connection".
0.35µm 6-BIT 250MSPS
BW1238X
PACKAGE DESCRIPTION Name REFTOP REFBOT VDDA VBBA VSSA AINT INCOM SPEEDUP ITEST VDDO VSSO CLKIN DO[5:0] VSSD VDDD 35~40 45,46 47,48 Type Description Reference (2.0V) Reference Bottom (1.0V) Internal Bias Point (Open=use internal bias circuit) Analog Power (3.3V) Analog Bias Analog Ground Analog Input Analog Input (Open=use internal bias circuit) Speed test pin. VDDA (3.3V) Internal Bias Point (Open=use internal bias circuit) Output Driving Power (3.3V) Output Driving Ground Clock Input Output buffer test pin. VDDD (3.3V) Digital Output Digital Ground Digital Power (3.3V)
NOTES: TYPE denote Power Ground respectively. INCOM other differential input, which fixed internally. bias pin, which fixed internally. ITEST test bias generator. When initial bias function working normally fixed VDDO VSSO output driving power pads.
BW1238X
0.35µm 6-BIT 250MSPS
USER GUIDE Input signal type designed only single mode input from AINT. this differential mode inputs, contact SEC. PHANTOM CELL INFORMATION Pins core assigned externally (Package pins) internally (internal ports) depending design methods. term "External" implies that pins should assigned externally like power pins. term "External/internal" implies that applications these pins depend user.
REFTOP
REFBOT
VDDD
VDDD
VDDA
VDDA
VSSD
VBBA VBBA VBBA VSSA VSSA
AINT INCOM
BW1238L
6-bit 250MSPS
DO[5] DO[4] DO[3] DO[2] DO[1] DO[0]
SPEEDUP ITEST
CLKIN
VSSD
0.35µm 6-BIT 250MSPS
BW1238X
PHANTOM CELL INFORMATION (Continued)
Name VDDA Usage External Layout Guide Maintain large width lines pads. place port positions minimize length power lines. merge analog powers with anoter power from other blocks. good power ground source board.
VSSA VBBA VDDD VSSD AINT CLKIN REFTOP REFBOT ITEST INCOM SPEEDUP DO[5] DO[4] DO[3] DO[2] DO[1] DO[0]
External External External External External/Internal overlap with digtal lines. Maintain shotest path pads. External/Internal Separate from other analog signals External/Internal Maintain larger width shorter length pads. Separate from other digital lines. External/Internal External/Internal External/Internal External/Internal External/Internal External/Internal Separated from analog clean signals possible. exceed length 1,000um. External/Internal External/Internal External/Internal External/Internal External/Internal
BW1238X
0.35µm 6-BIT 250MSPS
FEEDBACK REQUEST should quite helpful core development specify your system requirements following characteristic checking table fill additional questions. appreciate your interest products. Thank very much. Characteristics Analog power supply voltage Digital power supply voltage resolution Reference input voltage Analog input voltage Analog input bandwidth (Maximum input frequency) Operating temperature Integral non-linearity error Differential non-linearity error Bottom offset voltage error offset voltage error Maximum conversion rate Dynamic supply current Power dissipation Signal-to-noise ratio Pipeline delay Output loading capacitance Digital output format (Provide detailed description timing diagram) Between single input-output differential input-output configurations, which suitable your system why? Please comment internal/external configurations want have, have reason prefer some type configuration. Freely list those functions want implemented ADC, have any. Unit MSPS Remarks
0.35µm 6-BIT 250MSPS
BW1238X
HISTORY CARD Version Date 99.3.20 99.12.13 02.3.10 Modified Items Original version published Upgrade released version Insert History Card Section CHART, USER GUIDE, PHANTOM CELL INFORMATION Comments
BW1238X
0.35µm 6-BIT 250MSPS
NOTES

BW1238X BW1238X CMOS 6-Bit converter digital video disk (DVD) par

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