tsa1204 STMicroelectronics, tsa1204 Datasheet - Page 22

• Manufacturer Part Number: tsa1204
• Description: Dual-channel, 12-bit, 20msps, 120mw A/d Converter
• Manufacturer: STMicroelectronics

Application information
8.7.1
Caution:
8.7.2
8.7.3
22/31
Evaluation board operating conditions
Table 14
Table 14.
Do not use the VB3 power supply (5 V) dedicated to the 74LCX573 external buffers to
supply the VB2 of the TSA1203 which cannot exceed 3.3 V.
Consumption adjustment
Before beginnning characterization tests, make sure to adjust the R
I
Single and differential inputs
The test board can be driven on a single analog input, or on differential inputs. With a single
analog input, you must use the ADT1-1WT transformer to generate a differential signal. In
this configuration, the resistors RSI6, RSI7, RSI8 for channel I (respectively RSQ6, RSQ7,
RSQ8 for channel Q) are connected as short-circuits whereas RSI5, RSI9 (respectively
RSQ5, RSQ9 for channel Q) are open circuits.
Alternatively, you can use the JI1 and JI1B differential inputs. In this case, the resistances
RSI5, RSI9 for channel I (respectively RSQ5, RSQ9 for channel Q) are connected as short-
circuits whereas RSI6, RSI7, RSI8 (respectively RSQ6, RSQ7, RSQ8 for channel Q) are
open circuits.
pol
, value according to your sampling frequency.
Board marking
RMQ
CMQ
RPQ
GB1
GB2
GB3
RMI
CMI
VB1
VB2
VB3
RPI
DG
AG
AV
DV
below shows the connections to the board for the power supplies and other pins.
Board connections for power supplies and other pins
Connection
REFMQ
GNDBE
REFPQ
VCCBE
GNDB3
INCMQ
VCCB3
REFMI
GNDBI
VCCBI
REFPI
DGND
AGND
INCMI
DVCC
AVCC
Internal voltage (V)
0.89
0.46
0.89
0.46
pol
(Raj1), and therefore
External voltage (V)
1.8/2.5/3.3
<1.4
<0.4
<1.4
<0.4
2.5
2.5
2.5
2.5
<1
<1
0
0
0
0
0
TSA1204