Wideband I/Q Modulator with Sigma-Delta
Fractional-N Synthesizer
Table 8. TXEN Pin and Software Bit
Definitions
Table 11. BUFEN Pin and Software Bit
Definitions
TXEN
PIN
BIT
TX MODE
BUFEN
PIN
BIT
BUF MODE
0
0
1
1
0
1
0
1
TX off
TX off
TX off
TX enabled
0
0
1
1
0
1
0
1
Buffer off
Buffer off
Buffer off
Buffer on
Table 9. Charge-Pump Registers
Chip Information
CPX
0
0
0
0
1
1
1
CP1
0
0
1
1
0
0
1
CP0
0
1
0
1
0
1
0
I CP (μA)
170
350
520
690
340
670
1000
TRANSISTOR COUNT: 16,321
Package Information
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages .
1
1
1
1310
PACKAGE TYPE
PACKAGE CODE
DOCUMENT NO.
Table 10. Test Register Definition
(Default 0 Dec)*
28 TQFN-EP
T2855-3
21-0140
TEST MODE
T5
T4
T3
T2
T1
T0
TEST PIN
Normal
Operating
0
0
0
0
0
0
Mode
Charge Pump
Forced to
0
0
0
0
0
1
CP
Source Icp
Charge Pump
Forced to Sink
0
0
0
0
1
0
CP
Icp
Reference
Divider Output
Main Divider
Output
0
0
1
1
0
1
0
0
0
0
0
0
Lock
Lock
*All other logic states are undefined.
______________________________________________________________________________________
13
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