TDA8798HL Philips Semiconductors, TDA8798HL Datasheet - Page 10

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

Philips Semiconductors
Notes
1. ‘
2. In count-up/count-down mode, the gain control register cannot be incremented above the maximum gain value of 63,
Table 2 Abbreviations
Table 3 TE truth table
Note
1. TE must set HIGH for clock frequency below 10 Msps.
2001 Feb 14
GCR1
GCR2
SISR
X
U
Di
Dual 8-bit, 100 Msps A/D converter with optional DPGA
SYMBOL
or decremented below the minimum gain value of 0.
SMODE
TE
Di’: shifting LSB and loading new LSB with value Di.
0
1
1
1
DPGA1 gain control register value
DPGA2 gain control register value
serial interface shift register value
can be either logic state 0 or logic
state 1
rising edge
falling edge
can be either undefined logic state X
rising edge or falling edge
data input
track-and-hold enabled; note 1
track enabled
ADC TRACK-AND-HOLD
SCLK
X,
X,
DESCRIPTION
SEN1
X,
10
Table 4 SR truth table
Table 5 DPGAEN truth table
Table 6 Gain Control
DPGAEN
REGISTER VALUE
SEN2
GAIN CONTROL
SR
0
1
0
1
3EH
3FH
00H
01H
02H
...
...
...
maximum
minimum
enabled
disabled
ADC DIGITAL OUTPUT SLEW RATE
SDATA
DPGA FUNCTIONALITY
U
U
minimum
minimum + 0.52
minimum + 1.04
...
...
...
minimum + 32.48
minimum + 33.00
Product specification
GAIN (dBV)
GCR2: SISR
GCR1: SISR
GCR2: SISR
TDA8798
ACTION