PMR Signalling Processor
CMX881
AC Parameters (cont.)
Notes
Min.
Typ.
Max.
Unit
Modulator Outputs 1 and 2 and Audio Output
(MOD_1, MOD_2, AUDIO)
Power-up to output stable
37
50
0
100
0.2
0.6
µs
Modulator Attenuators
Attenuation (at 0dB)
dB
−0.2
−0.6
Cumulative Attenuation Error
(wrt attenuation at 0dB)
dB
Ω
kΩ
Output Impedance
38
38
600
500
Enabled
Disabled
Audio Attenuator
Attenuation (at 0dB)
0
0.5
1.0
dB
−0.5
−1.0
Cumulative Attenuation Error
(wrt attenuation at 0dB)
dB
Ω
kΩ
kΩ
Output Impedance
38
38
600
500
Enabled
Disabled
Feedback load resistance
80
Amplifier open loop voltage gain
(I/P = 1mV rms at 100Hz)
60
dB
Unity gain bandwidth
1.0
MHz
37
38
Power-up refers to issuing a C-BUS command to turn on an output. These limits
Notes:
apply only if V
is on and stable. At power supply switch-on, the default state
BIAS
is for all blocks, except the XTAL and C-BUS interface, to be in placed in power-
save mode.
Small signal impedance, at VDD = 3.0V and Tamb = 25°C.
2004 CML Microsystems Plc
51
D/881/7
CMLMICRO [ CML MICROCIRCUITS ]
