Quadrature Modulator
CMX993/CMX993W
CMX993
Pin No.
CMX993W
Pin No.
Signal
Type
Name
Description
35
36
37
38
39
40
41
42
43
44
45
46
47
48
35
36
37
38
39
40
41
42
43
44
45
46
47
48
NC
NC
NC
NC
reserved, do not connect to this pin
reserved, do not connect to this pin
Digital supply
VDD
Power
Power
I/P
VDDIO
SCLK
CDATA
CSN
Supply voltage for digital control interface
C-BUS serial clock
I/P
C-BUS command data input
C-BUS enable
I/P
RESETN
DVSS
VCC7
A1QP
A1QN
A1QO
A2QP
I/P
General reset (Reset when pin is held LOW)
Digital ground (0V)
Power
Power
I/P
Analogue supply
Amplifier 1 positive input (Q channel)
Amplifier 1 negative input (Q channel)
Amplifier 1 Output (Q Channel)
Amplifier 2 positive input (Q channel)
I/P
O/P
I/P
EXPOSED
METAL PAD
EXPOSED
METAL PAD
This pad must be connected to analogue ground
(0V)
VEE
Power
Table 1 Pin List
I/P = Input
O/P = Output
T/S = 3-state
NC = reserved, do not connect to this pin
3.1
Signal Definitions
Signal
Name
Pins
Usage
VCC1, VCC2, VCC3, VCC4, VCC5, VCC6,
VCC7
VDD
AVDD
DVDD
Power supply for analogue circuits
Power supply for digital circuits
Power supply voltage for digital interface
(C-BUS and RESETN)
VDDIO
VDDIO
AVSS
DVSS
VEE (Metal pad)
DVSS
Ground for all analogue circuits
Ground for all digital circuits
Connection for decoupling of internal band-
gap reference voltage
VREF
VREF
Buffered version of VREF which may be used
for bias of input signals etc.
BVREF
BVREF
Table 2 Definition of Power Supply and Reference Voltages
2013 CML Microsystems Plc
6
D/993/10
CMLMICRO [ CML MICROCIRCUITS ]
