MT8870 Ver la hoja de datos (PDF) - Mitel Networks
Número de pieza
componentes Descripción
Fabricante
MT8870 Datasheet PDF : 12 Pages
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MT8870D/MT8870D-1 ISO2-CMOS
Operating Characteristics - VDD=5.0V±5%, VSS=0V, -40°C ≤ TO ≤ +85°C ,unless otherwise stated.
Gain Setting Amplifier
Characteristics
Sym Min Typ‡ Max Units
Test Conditions
1 Input leakage current
2 Input resistance
3 Input offset voltage
4 Power supply rejection
IIN
RIN
10
VOS
PSRR 50
100
nA VSS ≤ VIN ≤ VDD
MΩ
25 mV
dB 1 kHz
5 Common mode rejection
CMRR 40
6 DC open loop voltage gain
7 Unity gain bandwidth
8 Output voltage swing
9 Maximum capacitive load (GS)
10 Resistive load (GS)
11 Common mode range
AVOL
fC
VO
CL
RL
VCM
32
0.30
4.0
2.5
dB 0.75 V ≤ VIN ≤ 4.25 V biased
at VRef =2.5 V
dB
MHz
Vpp Load ≥ 100 kΩ to VSS @ GS
100 pF
50 kΩ
Vpp No Load
MT8870D AC Electrical Characteristics - VDD=5.0V ±5%, VSS=0V, -40°C ≤ TO ≤ +85°C , using Test Circuit shown in
Figure 10.
Characteristics
Sym
Min
Typ‡ Max Units
Notes*
Valid input signal levels (each
1 tone of composite signal)
2 Negative twist accept
-29
27.5
+1
dBm
869 mVRMS
8
dB
3 Positive twist accept
8
dB
4 Frequency deviation accept
±1.5% ± 2 Hz
5 Frequency deviation reject
±3.5%
6 Third tone tolerance
-16
dB
7 Noise tolerance
-12
dB
8 Dial tone tolerance
+22
dB
‡ 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.
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
2,3,4,5,9,10
2,3,4,5,7,9,10
2,3,4,5,8,9,11
4-18
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