MT8870D/MT8870D-1 ISO2-CMOS
Operating Characteristics - V =5.0V 5%, V =0V, -40°C ≤ T ≤ +85°C ,unless otherwise stated.
DD
SS
O
Gain Setting Amplifier
‡
Characteristics
Input leakage current
Sym
Min
Typ
Max Units
Test Conditions
1
2
3
4
5
I
100
nA
MΩ
mV
dB
V
≤ V ≤ V
DD
IN
SS
IN
Input resistance
R
10
IN
Input offset voltage
Power supply rejection
Common mode rejection
V
OS
25
PSRR
CMRR
50
40
1 kHz
dB
0.75 V ≤ V ≤ 4.25 V biased
IN
at V =2.5 V
Ref
6
7
8
9
DC open loop voltage gain
Unity gain bandwidth
Output voltage swing
A
32
0.30
4.0
dB
VOL
f
MHz
C
V
V
Load ≥ 100 kΩ to V @ GS
O
pp
SS
Maximum capacitive load (GS)
C
R
100
50
pF
L
10 Resistive load (GS)
11 Common mode range
kΩ
L
V
2.5
V
No Load
CM
pp
MT8870D AC Electrical Characteristics -
V
=5.0V 5%, V =0V, -40°C ≤ T ≤ +85°C , using Test Circuit shown in
DD
SS
O
Figure 10.
‡
Characteristics
Sym
Min
Typ
Max
Units
dBm
mV
Notes*
1,2,3,5,6,9
Valid input signal levels (each
tone of composite signal)
-29
+1
869
8
1
27.5
1,2,3,5,6,9
2,3,6,9,12
2,3,6,9,12
2,3,5,9
RMS
2
3
4
5
6
7
8
Negative twist accept
Positive twist accept
Frequency deviation accept
Frequency deviation reject
Third tone tolerance
Noise tolerance
dB
dB
8
1.5% 2 Hz
3.5%
2,3,5,9
-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
Dial tone tolerance
‡ 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)
9. For an error rate of better than 1 in 10,000.
2 %.
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
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
