TDA8768 Datasheet, PDF (2/20 Pages) NXP Semiconductors – 12-bit high-speed Analog-to-Digital Converter ADC

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
V_CCA
V_CCD
V_CCO
I_CCA
I_CCD
I_CCO
INL
DNL
f_CLK(max)
P_tot
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
f_CLK = 4 MHz; f_i = 400 kHz
f_CLK = 4 MHz; f_i = 400 kHz
f_CLK = 4 MHz; f_i = 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