MT8870 Mitel Networks Corporation, MT8870 Datasheet - Page 8

• Manufacturer Part Number: MT8870
• Description: ISO2-CMOS Integrated DTMF Receiver
• Manufacturer: Mitel Networks Corporation

MT8870D/MT8870D-1
MT8870D AC Electrical Characteristics
‡ Typical figures are at 25 °C and are for design aid only: not guaranteed and not subject to production testing.
*
10. Referenced to lowest level frequency component in DTMF signal.
11. Referenced to the minimum valid accept level.
12. Guaranteed by design and characterization.
4-18
Operating Characteristics
Gain Setting Amplifier
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.
NOTES
10
11
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
Valid input signal levels (each
tone of composite signal)
Negative twist accept
Positive twist accept
Frequency deviation accept
Frequency deviation reject
Third tone tolerance
Noise tolerance
Dial tone tolerance
Input leakage current
Input resistance
Input offset voltage
Power supply rejection
Common mode rejection
DC open loop voltage gain
Unity gain bandwidth
Output voltage swing
Maximum capacitive load (GS)
Resistive load (GS)
Common mode range
Characteristics
Characteristics
- V
DD
=5.0V±5%, V
Sym
CMRR
PSRR
A
Sym
V
V
R
V
R
ISO
I
C
VOL
f
IN
OS
CM
C
IN
O
L
L
±1.5% ± 2 Hz
2
SS
-CMOS
- V
±3.5%
=0V, -40°C
0.30
Min
4.0
2.5
27.5
10
50
40
32
Min
-29
Figure 10.
DD
=5.0V ±5%, V
Typ
T
O
‡
Typ
+22
-16
-12
+85°C ,unless otherwise stated.
Max
100
100
SS
25
50
‡
=0V, -40°C
Max
869
+1
Units
8
8
MHz
M
V
V
mV
k
nA
dB
dB
dB
pF
pp
pp
T
O
mV
Units
dBm
V
1 kHz
0.75 V V
at V
Load
No Load
dB
dB
dB
dB
dB
+85°C , using Test Circuit shown in
RMS
SS
Ref
Test Conditions
V
=2.5 V
100 k
IN
2,3,6,9,12
2,3,5,9
2,3,5,9
2,3,4,5,7,9,10
2,3,4,5,8,9,11
1,2,3,5,6,9
1,2,3,5,6,9
2,3,6,9,12
2,3,4,5,9,10
IN
V
DD
4.25 V biased
Notes*
to V
SS
@ GS