CD22301 Datasheet, PDF (3/6 Pages) Intersil Corporation – Monolithic PCM Repeater

CD22301
Electrical Specifications T_A = 25^oC, V_CC = 5.1V ±5% (Continued)
PARAMETER
SYMBOL
FIGURE
NOTE
MIN
TYP
MAX
UNITS
Output Pulse Fall Time
t_F
4, 8
9, 10
-
-
40
ns
Output Pulse Width
t_W
4, 8
9, 10
290
324
340
ns
Pulse Width Differential
∆t_W
4, 8
9, 10
-10
0
10
ns
Clock Drive Current
I_CL
-
2
-
mA
NOTES:
1. No signal input. Measure voltage between pins 7 and 8.
2. Measure clock limiter input impedance at pin 15. See Figure 5.
3. Adjust potentiometer for 0V (See Figure 5). Measure ALBO off impedances from pins 2, 3 and 4 to pin 1.
4. Increase potentiometer until voltage at pin 17 = 2V (See Figure 5). Measure ALBO on impedances from pins 2, 3 and 4 to pin 1.
5. Adjust potentiometer for ∆V = 0V (See Figure 6). Then slowly increase ∆V in the positive direction until pulses are observed at the DATA
terminal.
6. Continue increasing ∆V until the DC level at the clock terminal drops to 4V (See Figure 6).
7. Continue increasing ∆V until the ALBO terminal rises to 1V (See Figure 6).
8. Turn potentiometer in the opposite direction and measure negative threshold voltages by repeating tests outlined in notes 5, 6 and 7.
9. Set e_IN = 2.75mV_RMS at f ≈ 1.185MHz. Adjust frequency until maximum amplitude is obtained at pin 15. Observe output pulses at pins
10 and 11.
10. Adjust input signal amplitude until pulses just appear in outputs. Increase input amplitude by 3dB.
8.2K
PULSE
430
INPUT
Ω
+
1µF
ALBO ^{SUBSTRATE ALBO}
GND ¹
18 BIAS 17 _0.1
µF
17µH
600 - 800pF
120K
BIAS _{LC TANK}
16 15 _INPUT
14 V_CC
AO1 2
AO2 3
4
AO3
0.1µF
ALBO
OUTPUT
CIRCUIT
SEE
FIG. 1
PEAK
DETECTOR
CLOCK
CIRCUIT
SEE FIG. 2
2200pF
470µH
2.7K
1500pF
510Ω
82pF
15µH
5
150pF
6
1.8K
130Ω
6.19K
0.1µF
1.33K
7
4.53K
8
0.1µF
PRE-
AMPLIFIER
CLOCK THRESHOLD
COMPARATOR
DATA THRESHOLD GATE
COMPARATOR
GATE
LIMITER
TIMING
PULSE
AMPLIFIER
FF
FF
13
12
11
10
9 VEE
100
µH
PHASE
SHIFT
NETWORK
3.83K
33pF
PULSE
OUTPUT
V_CC
FIGURE 1. TYPICAL 1.544MHz T1 REPEATER SYSTEM
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