TDA8798HL Philips Semiconductors, TDA8798HL Datasheet - Page 2

• Manufacturer Part Number: TDA8798HL
• Description: Dual 8-bit/ 100 Msps A/D converter with DPGA
• Manufacturer: Philips Semiconductors

Philips Semiconductors
FEATURES
QUICK REFERENCE DATA
1999 Sep 16
V
V
V
I
I
I
INL
DNL
V
B
B
f
P
DDA
DDD
DDO
(sample)(max)
Dual 8-bit Analog-to-Digital Converter (ADC)
Sampling rate up to 100 million samples per
second (Msps)
Dual 34 dBV 6-bit Digitally Programmable Gain
Amplifier (DPGA) with optional power-off
Optional external equalization filter with capacitive
coupling between DPGA and ADC
Serial Interface (SI) for DPGA gain control using either
parallel load mode or count-up/count-down mode
3.3 V TTL/CMOS compatible I/O
Differential or single-ended TTL/CMOS clock interface
AC or DC coupling for DPGA inputs.
SYMBOL
DDA
DDD
DDO
n(o)(rms)
( 3dB)(ADC)
( 3dB)(DPGA)
tot
Dual 8-bit, 100 Msps A/D converter with
DPGA
analog supply voltage
digital supply voltage
output stage supply voltage
analog supply current
digital supply current
output stage supply current
DC integral non-linearity
DC differential non-linearity
output referred noise (RMS value)
ADC 3 dB analogue bandwidth
DPGA 3 dB bandwidth
maximum sampling rate
total power dissipation
PARAMETER
with DPGAEN LOW
with DPGAEN HIGH
from IC analog input to digital
output; ramp input;
f
from IC analog input to digital
output; ramp input;
f
DPGA at G
noise bandwidth = 15 MHz
at V
at V
with DPGAEN LOW
with DPGAEN HIGH
CLK
CLK
with DPGA at G
without DPGA
with DPGA at G
without DPGA
i(dif)(FS)
i(dif)(max)
= 100 MHz
= 100 MHz
2
APPLICATIONS
GENERAL DESCRIPTION
The TDA8798 is a dual 8-bit ADC with DPGA.
The 100 Msps maximum sampling rate and 34 dBV DPGA
gain range optimizes the ADC for high dynamic range
applications.
CONDITIONS
(max)
High-dynamic range acquisition front-ends
Digital data storage read channels.
; Z
(min)
(min)
i
= 50 ;
3.15
3.0
2.7
30
100
MIN.
Objective specification
3.3
3.3
3.3
106
tbf
30
3
tbf
120
tbf
460
tbf
TYP.
3.0
1.0
0.5
0.5
TDA8798
3.45
3.6
3.6
tbf
tbf
tbf
tbf
2
500
tbf
MAX.
V
V
V
mA
mA
mA
mA
LSB
LSB
LSB
LSB
mV
MHz
MHz
Msps
mW
mW
UNIT
rms