MT88L70
Operating Characteristics
- V
DD
=3.0V+20%/-10%, V
SS
=0V, -40°C
≤
T
O
≤
+85°C, unless otherwise stated.
Gain Setting Amplifier
Characteristics
1
2
3
4
5
Input leakage current
Input resistance
Input offset voltage
Power supply rejection
Common mode rejection
Sym
I
IN
R
IN
V
OS
PSRR
CMRR
50
40
10
25
Min
Typ
‡
Max
100
Units
nA
MΩ
mV
dB
dB
1 kHz
V
SS
+ 0.75 V
≤
V
IN
≤
V
DD
-0.75
biased at V
Ref
=1.5 V
Test Conditions
V
SS
≤
V
IN
≤
V
DD
6
7
8
9
10
11
DC open loop voltage gain
Unity gain bandwidth
Output voltage swing
Maximum capacitive load (GS)
Resistive load (GS)
Common mode range
A
VOL
f
C
V
O
C
L
R
L
V
CM
32
0.30
2.2
100
50
1.5
dB
MHz
V
pp
pF
kΩ
V
pp
No Load
Load
≥
100 kΩ to V
SS
@ GS
AC Electrical Characteristics
-
Characteristics
1
Valid input signal levels
(each tone of composite
signal)
Negative twist accept
Positive twist accept
Frequency deviation accept
Frequency deviation reject
Third zone tolerance
Noise tolerance
Dial zone tolerance
V
DD
=3.0V +20%/-10%, V
SS
=0V, -40°C
≤
T
O
≤
+85°C, using Test Circuit shown in Fig. 6.
Sym
Min
-34
15.4
Typ
‡
Max
-4.0
489
8
8
Units
dBm
mV
RMS
dB
dB
Notes*
1,2,3,5,6,9
Min @ V
DD
=3.6V
Max @ V
DD
=2.7V
2,3,6,9,12
2,3,6,9,12
2,3,5,9
2,3,5,9
2
3
4
5
6
7
8
±1.5% ± 2 Hz
±3.5%
-16
-12
+22
dB
dB
dB
2,3,4,5,9,10
2,3,4,5,7,9,10
2,3,4,5,8,9,11
‡ Typical figures are at 25 °C and are for design aid only: not guaranteed and not subject to production testing.
*
NOTES
1. dBm= decibels above or below a reference power of 1 mW into a 600 ohm load.
2. Digit sequence consists of all DTMF tones.
3. Tone duration= 40 ms, tone pause= 40 ms.
4. Signal condition consists of nominal DTMF frequencies.
5. Both tones in composite signal have an equal amplitude.
6. Tone pair is deviated by ±1.5%± 2 Hz.
7. Bandwidth limited (3 kHz ) Gaussian noise.
8. The precise dial tone frequencies are (350 Hz and 440 Hz) ± 2 %.
9. For an error rate of better than 1 in 10,000.
10. Referenced to lowest level frequency component in DTMF signal.
11. Referenced to the minimum valid accept level.
12. Guaranteed by design and characterization.
4-29
MITEL [ MITEL NETWORKS CORPORATION ]
