MT8870D/MT8870D-1
Gain Setting Amplifier
Characteristics
1
2
3
4
5
6
7
8
9
10
11
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
ISO
2
-CMOS
Operating Characteristics
- V
DD
=5.0V±5%, V
SS
=0V, -40°C
≤
T
O
≤
+85°C ,unless otherwise stated.
Sym
I
IN
R
IN
V
OS
PSRR
CMRR
A
VOL
f
C
V
O
C
L
R
L
V
CM
2.5
50
40
32
0.30
4.0
100
50
10
25
Min
Typ
‡
Max
100
Units
nA
MΩ
mV
dB
dB
dB
MHz
V
pp
pF
kΩ
V
pp
No Load
Load
≥
100 kΩ to V
SS
@ GS
1 kHz
0.75 V
≤
V
IN
≤
4.25 V biased
at V
Ref
=2.5 V
Test Conditions
V
SS
≤
V
IN
≤
V
DD
MT8870D AC Electrical Characteristics
-
Characteristics
1
2
3
4
5
6
7
8
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
Sym
V
DD
=5.0V ±5%, V
SS
=0V, -40°C
≤
T
O
≤
+85°C , using Test Circuit shown in
Figure 10.
Min
-29
27.5
Typ
‡
Max
+1
869
8
8
Units
dBm
mV
RMS
dB
dB
Notes*
1,2,3,5,6,9
1,2,3,5,6,9
2,3,6,9,12
2,3,6,9,12
2,3,5,9
2,3,5,9
±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.
4-18
MITEL [ MITEL NETWORKS CORPORATION ]
