TDA8768 Ver la hoja de datos (PDF) - Philips Electronics
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TDA8768 Datasheet PDF : 20 Pages
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Philips Semiconductors
12-bit high-speed Analog-to-Digital
Converter (ADC)
Preliminary specification
TDA8768
FEATURES
• 12-bit resolution
• Sampling rate up to 55 MHz
• −3 dB bandwidth of 190 MHz
• 5 V power supplies
• Binary or twos-complement CMOS outputs
• In-range CMOS-compatible output
• TLL-CMOS compatible static digital inputs
• 3 to 5 V CMOS-compatible digital outputs
• Differential clock input; Positive Emitter Coupled Logic
(PECL)-compatible
• Power dissipation 325 mW (typical)
• Low analog input capacitance (typical 2 pF), no buffer
amplifier required
• Integrated sample-and-hold amplifier
• Differential analog input
• External amplitude range control
• Voltage controlled regulator included.
APPLICATIONS
• High-speed analog-to-digital conversion for
– Video signal digitizing
– High Definition TV (HDTV)
– Imaging (camera scanner)
– Medical imaging
– Telecommunication
– Base-station receiver.
GENERAL DESCRIPTION
The TDA8768 is a bipolar 12-bit Analog-to-Digital
Converter (ADC) optimized for telecommunications and
professional imaging. It converts the analog input signal
into 12-bit binary coded digital words at a maximum
sampling rate of 55 MHz. All static digital inputs (SH, CE
and OTC) are TTL and CMOS compatible and all outputs
are CMOS compatible. A sine wave clock input signal can
also be used.
QUICK REFERENCE DATA
SYMBOL
VCCA
VCCD
VCCO
ICCA
ICCD
ICCO
INL
DNL
fCLK(max)
Ptot
PARAMETER
analog supply voltage
digital supply voltage
output supply voltage
analog supply current
digital supply current
output supply current
integral non-linearity
differential non-linearity
maximum clock frequency
TDA8768H/4
TDA8768H/5
total power dissipation
CONDITIONS
fCLK = 4 MHz; fi = 400 kHz
fCLK = 4 MHz; fi = 400 kHz
fCLK = 4 MHz; fi = 400 kHz
MIN.
4.75
4.75
3.0
−
−
−
−
−
TYP.
5.0
5.0
3.3
33
30
3.2
±2.0
±0.6
MAX. UNIT
5.25 V
5.25 V
5.25 V
tbf
mA
tbf
mA
tbf
mA
±4.5 LSB
±1.0 LSB
40
−
−
MHz
55
−
−
MHz
−
325 tbf
mW
ORDERING INFORMATION
TYPE
NUMBER
TDA8768H/4
TDA8768H/5
NAME
QFP44
PACKAGE
DESCRIPTION
VERSION
plastic quad flat package; 44 leads
(lead length 1.3 mm); body 10 × 10 × 1.75 mm SOT307-2
SAMPLING
FREQUENCY (MHz)
40
55
1998 Aug 26
2
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