CLARE CPC5622A

CPC5622
RMS
3kV
Isolation
LITELINK® III Phone Line Interface IC (DAA)
Features
• Embedded modems for POS terminals, automated
banking, remote metering, vending machines,
security, and surveillance
• Superior voice solution with low noise and excellent
part-to-part gain accuracy
• 3 kVRMS line isolation
• Simultaneous ringing detection and CID monitoring
for worldwide applications
• Provides both full-wave ringing detect and half-wave
ringing detect for maximum versatility
• Transmit power of up to +10 dBm into 600 Ω
• Data access arrangement (DAA) solution for modem
speeds up to V.92
• 3.3V or 5 V power supply operation
• Easy interface with modem ICs and voice CODECs
• Worldwide dial-up telephone network compatibility
• CPC5622 can be used in circuits that comply with
the requirements of TIA/EIA/IS-968 (FCC part 68),
UL60950 (UL1950), EN60950, IEC60950,
EN55022B, CISPR22B, EN55024, and TBR-21
• Line-side circuit powered from telephone line
• Compared to other silicon DAA solutions, LITELINK:
- Uses fewer passive components
- Takes up less printed-circuit board space
- Uses less telephone line power
- Is a single-IC solution
Description
LITELINK III is a single-package silicon phone line
interface (PLI) DAA used in voice and data
communication applications to make connections
between host equipment and telephone networks.
LITELINK uses on-chip optical components and a few
inexpensive external components to form the required
high voltage isolation barrier. LITELINK eliminates the
need for large isolation transformers or capacitors
used in other phone line interface configurations.
LITELINK also provides AC and DC phone line
terminations, switchhook, 2-wire to 4-wire hybrid,
ringing detection, and full time receive on-hook
transmission capability.
The CPC5622 is a member of and builds upon Clare’s
third generation of LITELINK products with improved
insertion loss performance and lower minimum current
draw from the phone line. The CPC5622 version of
LITELINK III provides concurrent ringing detection and
CID monitoring for world wide applications. Both
half-wave and full-wave ringing detection are provided
for maximum versatility.
Applications
•
•
•
•
•
•
Computer telephony and gateways, such as VoIP
PBXs
Satellite and cable set-top boxes
V.92 (and other standard) modems
Fax machines
Voicemail systems
Ordering Information
Part Number
CPC5622A
CPC5622ATR
Description
32-pin Phone Line Interface, 50/tube
32-pin Phone Line Interface, tape and reel,
1000/reel
Figure 1. CPC5622 Block Diagram
Isolation Barrier
Tx+
Transmit
Diff.
Amplifier
Tx-
TIP
Transmit
Isolation
Amplifier
MODE
Tx.
Gain
Trim
OH
Rx.
Gain
Trim
Transconductance
Stage
2-4 Wire Hybrid
AC/DC Termination
Hook Switch
Receive
Isolation
Amplifier
RING
Rx+
Receive
Diff.
Amplifier
Rx-
Ringing Detect Outputs
RING
RING2
DS-CPC5622 - Rev. 1.0
Rx MUX
&
Ringing Det.
CSNOOP
Half Wave
Full Wave
Snoop
Amplifier
CSNOOP
RSNOOP
RSNOOP
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1
CPC5622
1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
3
3
5
2. Application Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Resistive Termination Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.1 Resistive Termination Application Circuit Part List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Reactive Termination Application Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.1 Reactive Termination Application Circuit Part List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
6
7
8
9
3. Using LITELINK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Switch Hook Control (On-hook and Off-hook States) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 On-hook Operation: OH=1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2.1 Ringing Signal Reception via the Snoop Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Off-Hook Operation: OH=0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.1 Receive Signal Path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3.2 Transmit Signal Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Initialization Requirement Following Power-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5 DC Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5.1 Setting a Current Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6 AC Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.1 Resistive Termination Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.2 Reactive Termination Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.3 Mode Pin Usage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
10
10
10
12
12
12
13
13
13
13
13
13
13
4. Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5. LITELINK Design Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1 Clare, Inc. Design Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6. LITELINK Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7. Manufacturing Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1 Mechanical Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2 Tape and Reel Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.3 Manufacturing Assembly Processes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.3.1 Moisture Reflow Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.3.2 Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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17
18
18
18
18
Rev. 1.0
CPC5622
1. Electrical Specifications
1.1 Absolute Maximum Ratings
Parameter
Minimum Maximum
Isolation Voltage
-
Unit
3000
VRMS
150
mA
1
W
Continuous Tip to Ring
Current (RZDC = 5.2Ω)
Total Package Power
Dissipation
Absolute maximum ratings are stress ratings. Stresses in
excess of these ratings can cause permanent damage to
the device. Functional operation of the device at conditions
beyond those indicated in the operational sections of this
data sheet is not implied.
VDD
-0.3
6
V
Logic Inputs
-0.3
VDD + 0.3
V
Operating temperature
-40
+85
°C
Storage temperature
-40
+125
°C
Unless otherwise specified all specifications are at 25°C and VDD=5.0V.
1.2 Performance
Parameter
Minimum
Typical
Maximum
Unit
Conditions
Operating Voltage VDD
3.0
-
5.5
V
Host side
Operating Current IDD
-
9
13
mA
Host side
Operating Voltage VDDL
2.8
-
3.2
V
Operating Current IDDL
-
7
8
mA
DC Characteristics
Line side, derived from tip and ring
Line side, drawn from tip and ring while off-hook
On-hook Characteristics
Metallic DC Resistance
10
-
-
MΩ
Tip to ring, 100 Vdc applied
Longitudinal DC Resistance
10
-
-
MΩ
150 Vdc applied from tip and ring to Earth ground
Ringing Signal Detect Level
5
-
-
VRMS
68 Hz ringing signal applied to tip and ring
Ringing Signal Detect Level
28
-
-
VRMS
15 Hz ringing signal applied across tip and ring
Snoop Circuit Frequency Response
166
-
>4000
Hz
-3 dB corner frequency @ 166 Hz, in Clare
application circuit
Snoop Circuit CMRR1
-
40
-
dB
120 VRMS 60 Hz common-mode signal across tip
and ring
Ringer Equivalence
-
0.01B
-
REN
-
dB
Per FCC part 68
Longitudinal Balance1
60
Off-Hook Characteristics
AC Impedance
Longitudinal Balance1
Return Loss
-
600
-
Ω
Tip to ring, using resistive termination application
circuit
60
-
-
dB
Per FCC part 68
-
26
-
dB
Into 600 Ω at 1800 Hz
30
-
4000
Hz
-3 dB corner frequency 30 Hz
Transmit and Receive Characteristics
Frequency Response
Rev. 1.0
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3
CPC5622
Parameter
Transhybrid Loss
Transmit and Receive Insertion Loss
Minimum
Typical
Maximum
Unit
Conditions
-
36
-
dB
Into 600 Ω at 1800 Hz, with C18 in the resistive
termination application circuit
30 Hz to 4 kHz,
Resistive termination application circuit with MODE
de-asserted.
Reactive termination application circuit with MODE
asserted.
-0.4
0
0.4
dB
Average In-band Noise
-
-126
-
dBm/Hz
Harmonic Distortion
-
-80
-
dB
Transmit Level
-
-
2.2
VP-P
Single-tone sine wave. Or 0 dBm into 600 Ω.
Receive Level
-
-
2.2
VP-P
Single-tone sine wave. Or 0 dBm into 600 Ω.
RX+/RX- Output Drive Current
-
-
0.5
mA
Sink and source
60
90
120
kΩ
Isolation Voltage
3000
-
-
Vrms
Line side to host side, one minute duration
Surge Rise Time
2000
-
-
V/µS
No damage via tip and ring
Input Low Voltage
-
-
0.8
VIL
Input High Voltage
2.0
-
-
VIH
High Level Input Current
-
-
-120
µA
VIN ≤ VDD
Low Level Input Current
-
-
-120
µA
VIN = GND
Output High Voltage
VDD -0.4
-
-
V
IOUT = -400 µA
Output Low Voltage
-
-
0.4
V
IOUT = 1 mA
TX+/TX- Input Impedance
4 kHz flat bandwidth
-3 dBm, 600 Hz, 2nd harmonic
Isolation Characteristics
MODE and OH Control Logic Inputs
RING and RING2 Output Logic Levels
Specifications subject to change without notice. All performance characteristics based on the use of Clare application circuits. Functional operation of the device at
conditions beyond those specified here is not implied.
NOTES:
1) This parameter is layout and component tolerance dependent.
4
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Rev. 1.0
CPC5622
1.3 Pin Description
Pin
Name
Figure 2. Pinout
Function
1
VDD
2
TXSM
Transmit summing junction
3
TX-
Negative differential transmit signal to DAA
from host
4
TX+
Positive differential transmit signal to DAA from
host
5
TX
Transmit differential amplifier output
6
MODE
When asserted low, changes gain of TX path
(-7 dB) and RX path (+7 dB) to accommodate
reactive termination networks
7
GND
Host (CPE) side analog ground
8
OH
Assert logic low for off-hook operation
9
RING
Half wave ringing detect output signal
Host (CPE) side power supply
10 RING2
Full wave ringing detect output signal
11 RX-
Negative differential analog signal received
from the telephone line. Must be AC coupled
with 0.1 µF.
12 RX+
Positive differential analog signal received from
the telephone line. Must be AC coupled with
0.1 µF.
13 SNP+
Positive differential snoop input
14 SNP-
Negative differential snoop input
15 RXF
Receive photodiode amplifier output
16 RX
Receive photodiode summing junction
17 VDDL
Power supply for line side, regulated from tip
and ring.
18 RXS
Receive isolation amp summing junction
19 RPB
Receive LED pre-bias current set
20 BR-
Bridge rectifier return
21 ZDC
Electronic inductor DCR/current limit
22 DCS2
DC feedback output
23 DCS1
V to I slope control
24 NTF
Network amplifier feedback
25 GAT
External MOSFET gate control
26 NTS
Receive signal input
27 BR-
Bridge rectifier return
28 TXSL
Transmit photodiode summing junction
29 ZNT
Receiver impedance set
30 ZTX
Transmit transconductance gain set
31 TXF
Transmit photodiode amplifier output
32 REFL
1.25 Vdc reference
Rev. 1.0
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1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
VDD
TXSM
TXTX+
TX
MODE
GND
OH
RING
RING2
RXRX+
SNP+
SNPRXF
RX
REFL
TXF
ZTX
ZNT
TXSL
BRNTS
GAT
NTF
DCS1
DCS2
ZDC
BRRPB
RXS
VDDL
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
5
CPC5622
2. Application Circuits
The application circuits that follow address both types
of line termination models. A reactive termination
application circuit that describes a TBR-21
implementation is shown in Figure 2.2 on page 8. This
circuit can be easily adapted for other reactive
termination needs.
LITELINK can be used with telephone networks
worldwide. Some public telephone networks, notably
in North America and Japan require a resistive line
termination. Other telephone networks as in Europe,
China and elsewhere require reactive line termination.
2.1 Resistive Termination Application Circuit
Figure 3. Resistive Termination Application Circuit Schematic
3.3 or 5V
R23 2
10
C1
1µ
FB1
600 Ω
200 mA
C16
10µ
A
U1
A
R1
(RTX)
80.6K
TXTX+
REFL
32
2 TXSM
TXF
31
ZTX
1 VDD
C13
0.1µ
3 TX-
C2
0.1µ
4 TX+
OH
ZNT
TXSL
28
6 MODE
BR-
27
7 GND
NTS
26
8 OH
GAT 25
RING
9 RING
RING2
10 RING2
RXRX+
NTF
C9
0.1µ
BR-
30
29
5 TX
A
LITELINK
R5
(RTXF)
60.4K
R75
(RNTX)
261K
BR-
R12
(RNTF)
24
499K
C14
C4
0.1µ 11
RX-
DCS1 23
DCS2
C12
(CDCS)
0.027µ
BR-
ZDC 21
BR- 20
14 SNP-
RPB
19
15 RXF
RXS
BR-
R3
(RSNPD)
1.5M
C8
(CSNP+) 4
220p
C15
0.01µ
500V
R20
(RVDDL)
2
5%
BR-
+
DB1
TIP
R18
(RZTX)
3.32K
C18
15p 3
R10
(RZNT)
301
R4
(RPB)
68.1
C7
(CSNP-) 4
220p
Q1
CPC5602C
47
5%
BRR76 (RHTF)
200K
R8 (R
221K HTX)
VDDL 17
R2
(RRXF)
130K
R14
(RGAT)
R16 (R
3
ZDC)
8.2
18
BR-
SP1 1
BR-
RING
BR-
R6
(RSNP-2)
R44
(RSNP-1)
1.8M
1.8M
R7
(RSNP+2)
R45
(RSNP+1)
1.8M
1.8M
NOTE: Unless otherwise noted:
Resistor values are in Ohms
All resistors are 1%.
Capacitor values are in Farads.
¹This design was tested and found to comply with FCC Part 68 with this
Sidactor. Other compliance requirements may require a different part.
²Higher-noise power supplies may require substitution of a 220 µH inductor,
Toko 380HB-2215 or similar. See the Power Quality section of Clare
application note AN-146, Guidelines for Effective LITELINK Designs for
more information.
³Optional for enhanced transhybrid loss.
6
R21
(RDCS1B)
6.49M
R15
(RDCS2)
22
13 SNP+
R22
(RDCS1A)
6.49M
C21
100p
BR- (CGAT)
1.69M
0.1µ 12
RX+
16 RX
C10
0.01µ
500V
R13
(RNTS)
1M
4Use
voltage ratings based on the isolation requirements of your application.
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Rev. 1.0
CPC5622
2.1.1 Resistive Termination Application Circuit Part List
Quantity
Reference Designator
Description
1
5
C1
C2, C4, C9, C13, C14
1 µF, 16 V, ±10%
0.1 µF, 16 V, ±10%
2
C7, C8 1
C10, C15
C12
C16
C18 (optional)
C21
R1
R2
R3
R4
R5
220 pF, ±5%
2
1
1
1
1
1
1
1
1
1
0.01 µF, 500 V, ±10%
0.027 µF, 16 V, ±10%
10 µF, 16 V, ±10%
15 pF, 16 V, ±10%
100 pF, 16 V, 10%
80.6 kΩ, 1/16 W, ±1%
130 kΩ, 1/16 W, ±1%
1.5 MΩ, 1/16 W, ±1%
68.1 Ω, 1/16 W, ±1%
60.4 kΩ, 1/16 W, ±1%
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
R6, R7, R44, R45 2
R8
R10
R12
R13
R14
R15
R16
R18
R20
R21, R22
R23
R75
R76
FB1
DB1
221 kΩ, 1/16 W, ±1%
301 Ω, 1/16 W, ±1%
499 kΩ, 1/16 W, ±1%
1 MΩ, 1/16 W, ±1%
47 Ω, 1/16 W, ±5%
1.69 MΩ, 1/16 W, ±1%
8.2 Ω, 1/8 W, ±1%
3.32 kΩ, 1/16 W, ±1%
2 Ω, 1/16 W, ±5%
6.49 MΩ, 1/16 W, ±1%
10 Ω, 1/16 W, ±5%, or 220 µH inductor
261 kΩ, 1/16 W, ±1%
200 kΩ, 1/16 W, ±1%
600 Ω, 200 mA ferrite bead
S1ZB60 bridge rectifier
1
SP1
350 V
1
1
Q1
U1
CPC5602 FET
CPC5622 LITELINK
4
Supplier(s)
AVX, Murata, Novacap, Panasonic,
SMEC, Tecate, etc.
1.8 MΩ, 1/10 W, ±1%
Panasonic, Electro Films, FMI, Vishay,
etc.
Murata BLM11A601S or similar
Shindengen, Diodes, Inc.
Bourns (TISP4350H3) or
Teccor (P3100SC)
Clare
1
Use voltage ratings based on the isolation requirements of your application. Typical applications will require 2kV to safely hold off the isolation voltage.
2
Use components that allow enough space to account for the possibility of high-voltage arcing.
Rev. 1.0
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7
CPC5622
2.2 Reactive Termination Application Circuit
Figure 4. Reactive Termination Application Circuit Schematic
3.3 or 5V
R23 2
10
C1
1µ
FB1
600 Ω
200 mA
C16
10µ
A
U1
A
R1
(RTX)
80.6K
TXTX+
1 VDD
TXF
3 TX-
ZTX
C2
0.1µ
4 TX+
ZNT
29
TXSL
28
6 MODE
BR-
27
7 GND
NTS 26
8 OH
GAT 25
RING
9 RING
RING2
10 RING2
NTF
BR-
30
0.1µ
OH
C9
0.1µ
31
C13
A
RX+
REFL 32
2 TXSM
5 TX
RX-
LITELINK
R5
(RTXF)
60.4K
R75
(RNTX)
110K
BR-
R12
(RNTF)
24
C14
0.1µ 11
RX-
C4
0.1µ 12
RX+
DCS2
BR-
RPB
15 RXF
Q1
CPC5602C
47
5%
C15
0.01µ
500V
R20
(RVDDL)
2
5%
BR-
+
DB1
BR-
19
R76 (RHTF)
200K
R8 (RHTX)
RXS
TIP
-
200K
VDDL 17
R4
(RPB)
68.1
R2
(RRXF)
130K
R14
(RGAT)
R16 (R
3
ZDC)
8.2
BR- 20
18
16 RX
C12
(CDCS)
0.027µ
ZDC 21
14 SNP-
R21
(RDCS1B)
6.49M
R15
(RDCS2)
22
1.69M
13 SNP+
R22
(RDCS1A)
6.49M
C21
100p
BR- (CGAT)
221K
DCS1 23
C10
0.01µ
500V
R13
(RNTS)
1M
BR-
R10
59 (RZNT1)
R18
(RZTX)
10K
BR-
SP1 1
BR-
RING
C20
(CZNT)
0.68µ
R11
169 (RZNT2)
BR-
C7
(CSNP-) 4
220p
R3
(RSNPD)
1.5M
C8
(CSNP+) 4
220p
R6
(RSNP-2)
R44
(RSNP-1)
1.8M
1.8M
R45
(RSNP+1)
R7
(RSNP+2)
1.8M
1.8M
NOTE: Unless otherwise noted:
Resistor values are in Ohms
All resistors are 1%.
Capacitor values are in Farads.
¹This design was tested and found to comply with FCC Part 68 with this
Sidactor. Other compliance requirements may require a different part.
²Higher-noise power supplies may require substitution of a 220 µH inductor,
Toko 380HB-2215 or similar. See the Power Quality section of Clare
application note AN-146, Guidelines for Effective LITELINK Designs for
more information.
3
RZDC sets the loop-current limit, see “Setting a Current Limit” on
page 13. Also see Clare application note AN-146 for heat sinking
recommendations for the CPC5602C FET.
4
Use voltage ratings based on the isolation requirements of your application.
8
www.clare.com
Rev. 1.0
CPC5622
2.2.1 Reactive Termination Application Circuit Part List
Quantity
Reference Designator
Description
1
5
C1
C2, C4, C9, C13, C14
1 µF, 16 V, ±10%
0.1 µF, 16 V, ±10%
2
C7, C8 1
C10, C15
C12
C16
C20
C21
R1
R2
R3
R4
R5
220 pF, ±5%
2
1
1
1
1
1
1
1
1
1
0.01 µF, 500 V, ±10%
0.027 µF, 16 V, ±10%
10 µF, 16 V, ±10%
0.68 µF, 16 V, ±10%
100 pF, 16 V, 10%
80.6 kΩ, 1/16 W, ±1%
130 kΩ, 1/16 W, ±1%
1.5 MΩ, 1/16 W, ±1%
68.1 Ω, 1/16 W, ±1%
60.4 kΩ, 1/16 W, ±1%
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
R6, R7, R44, R45 2
R8
R10
R11
R12
R13
R14
R15
R16
R18
R20
R21, R22
R23
R75
R76
FB1
DB1
200 kΩ, 1/16 W, ±1%
59 Ω, 1/16 W, ±1%
169 Ω, 1/16 W, ±1%
221 kΩ, 1/16 W, ±1%
1 MΩ, 1/16 W, ±1%
47 Ω, 1/16 W, ±5%
1.69 MΩ, 1/16 W, ±1%
8.2 Ω, 1/8 W, ±1%
10 kΩ, 1/16 W, ±1%
2 Ω, 1/16 W, ±5%
6.49 MΩ, 1/16 W, ±1%
10 Ω, 1/16 W, ±5%, or 220 µH inductor
110 kΩ, 1/16 W, ±1%
200 kΩ, 1/16 W, ±1%
600 Ω, 200 mA ferrite bead
S1ZB60 bridge rectifier
1
SP1
350 V
1
1
Q1
U1
CPC5602 FET
CPC5622 LITELINK
4
1Use
2
Supplier
AVX, Murata, Novacap, Panasonic,
SMEC, Tecate, etc.
1.8 MΩ, 1/10 W, ±1%
Panasonic, Electro Films, FMI, Vishay,
etc.
Murata BLM11A601S or similar
Shindengen, Diodes, Inc.
Bourns (TISP4350H3) or
Teccor (P3100SC)
Clare
voltage ratings based on the isolation requirements of your application. Typical applications will require 2kV to safely hold off the isolation voltage.
Use components that allow enough space to account for the possibility of high-voltage arcing.
Rev. 1.0
www.clare.com
9
CPC5622
3. Using LITELINK
As a full-featured telephone line interface, LITELINK
performs the following functions:
•
•
•
•
•
•
•
Asserting OH low causes LITELINK to answer or
originate a call by entering the off-hook state. In the
off-hook state, loop current flows through LITELINK.
DC termination and V/I slope control
AC impedance control
2-wire to 4-wire conversion (hybrid)
Current limiting
Ringing detect signalling reception
Caller ID signalling reception
Switch hook
3.2 On-hook Operation: OH=1
LITELINK can accommodate specific application
features without sacrificing basic functionality or
performance. Application features include, but are not
limited to:
•
•
•
•
•
•
•
•
High transmit power operation
Pulse dialing
Ground start
Loop start
Parallel telephone off-hook detection (line intrusion)
Battery reversal detection
Line presence detection
World-wide programmable operation
This section of the data sheet describes LITELINK
operation in standard configuration for usual
operation. Clare offers additional application
information on-line (see Section 5 on page 14) for the
following topics:
•
•
•
•
•
•
Circuit isolation considerations
Optimizing LITELINK performance
Data Access Arrangement architecture
LITELINK circuit descriptions
Surge protection
EMI considerations
Other specific application materials are also
referenced in this section as appropriate.
3.1 Switch Hook Control (On-hook
and Off-hook States)
LITELINK operates in one of two conditions, on-hook
and off-hook. In the on-hook condition the telephone
line is available for calls. In the off-hook condition the
telephone line is engaged. The OH control input is
used to place LITELINK in one of these two states.
With OH high, LITELINK is on-hook and ready to
make or receive a call. Also while on-hook,
10
LITELINK’s ringing detector and CID amplifiers are
both active.
The LITELINK application circuit leakage current is
less than 10 µA with 100 V across ring and tip,
equivalent to greater than 10 MΩ on-hook resistance.
3.2.1 Ringing Signal Reception via the
Snoop Circuit
In the on-hook state (OH not asserted), an internal
multiplexer engages the snoop circuitry. This circuit
simultaneously monitors the telephone line for two
conditions; incoming ringing signal and caller ID data
bursts.
Refer to the application schematic diagram (see Figure
3 on page 6). C7 (CSNP-) and C8 (CSNP+) provide a
high-voltage isolation barrier between the telephone
line and SNP- and SNP+ input pins of the LITELINK
while coupling AC signals to the snoop amplifier. The
snoop circuit “snoops” the telephone line continuously
while drawing no dc current. In the LITELINK, the
incoming ringing signals are compared to a reference
level. When the ringing signal exceeds the preset
threshold, the internal comparators generate the
RING and RING2 signals which are output from
LITELINK at pins 9 and 10, respectively. Selection of
which output to use is dependent upon the support
logic responsible for monitoring and filtering the
ringing detect signals. To reduce or eliminate false
ringing detects this signal should be digitally filtered
and qualified by the system as a valid ringing signal. A
logic low output on RING or RING2 indicates that the
LITELINK ringing signal detect threshold has been
exceeded. In the absence of any incoming ac signal
the RING and RING2 outputs are held high.
The CPC5622 RING output signal is generated by a
half-wave ringing detector while the RING2 output is
generated by a full-wave ringing detector. A half-wave
ringing detector’s output frequency follows the
frequency of the incoming ringing signal from the
Central Office (CO) while a full-wave ringing detector’s
output frequency is twice that of the incoming signal.
Because RING is the output of a half-wave detector, it
will output one logic low pulse per cycle of the ringing
frequency. Also, because the RING2 is the output of a
www.clare.com
Rev. 1.0
CPC5622
full-wave detector it will output two logic low pulses
per cycle of the ringing frequency. Hence, the
nomenclature RING2 for twice the output pulses.
external snoop circuit components from a valid ringing
signal.
3.2.3 On-hook Caller ID Signal Reception
The set-up of the ringing detector comparator causes
the RING output pulses to remain low for most of one
half-cycle of the ringing signal and remains high for the
entire second half-cycle of the ringing signal. For the
RING2 output, the pulses remain low during most of
both halves of the ringing cycle and returns high for
only a short period near the zero-crossing of the
ringing signal. Both of the ringing outputs remain high
during the silent interval between ringing bursts.
Hysteresis is employed in the LITELINK ringing
detector circuit to improve noise immunity.
On-hook Caller IDentity (CID) data burst signals are
coupled through the snoop components, buffered
through LITELINK and output at the RX+ and RXpins.
In North America, CID data signals are typically sent
between the first and second ringing signal while in
other countries the CID information may arrive prior to
any other signalling state.
In applications that transmit CID after the first ringing
burst such as in North American, follow these steps to
receive on-hook caller ID data via the LITELINK RX
outputs:
The ringing detection threshold depends on the values
of R3 (RSNPD), R6 & R44 (RSNP-), R7 & R45 (RSNP+),
C7 (CSNP-), and C8 (CSNP+). The value of these
components shown in the application circuits are
recommended for typical operation. The ringing
detection threshold can be changed according to the
following formula:
1. Detect the first full ringing signal burst on RING
or RING2.
2. Monitor and process the CID data from the RX
outputs.
750mV
V RINGPK =  -----------------
R SNPD
For applications as in China and Brazil where CID may
arrive prior to ringing, follow these steps to receive
on-hook caller ID data via the LITELINK RX outputs:
( R SNP
2
1
+ R SNPD ) + ------------------------------------TOTAL
2
( πf RING C SNP )
Where:
• RSNPD = R3 in the application circuits shown in this
data sheet.
• RSNPTOTAL = the total of R6, R7, R44, and R45 in
the application circuits shown in this data sheet.
• CSNP = C7 = C8 in the application circuits shown in
this data sheet.
• And ƒRING is the frequency of the ringing signal.
1. Simultaneously monitor for CID data from the RX
outputs and for ringing on RING or RING2.
2. Process the appropriate signalling data.
Note: Taking LITELINK off-hook (via the OH pin)
disconnects the snoop path from the receive outputs
and disables the ringing detector outputs RING and
RING2.
CID gain from tip and ring to RX+ and RX- is
determined by:
Clare Application Note AN-117 Customize Caller ID Gain
and Ring Detect Voltage Threshold is a spreadsheet for
trying different component values in this circuit.
Changing the ringing detection threshold will also
change the caller ID gain and the timing of the polarity
reversal detection pulse, if used.
6R SNPD
GAIN CID ( dB ) = 20 log ------------------------------------------------------------------------------------------------2
1
(R
+R
) + -------------------------
3.2.2 Polarity Reversal Detection in On-hook
State
Where:
The full-wave ringing detector in the CPC5622 makes
it possible to detect tip and ring battery polarity
reversal using the RING2 output. When the polarity of
the battery voltage applied to tip and ring reverses, a
pulse on RING2 indicates the event. The system logic
must be able to discriminate a single pulse of
approximately 1 msec when using the recommended
Rev. 1.0
SNP TOTAL
SNPD
( πfC SNP )
2
• RSNPD = R3 in the application circuits in this data
sheet.
• RSNPTOTAL = the total of R6, R7, R44, and R45 in
the application circuits in this data sheet.
• CSNP = C7 = C8 in the application circuits in this data
sheet.
• and ƒ is the frequency of the CID signal
www.clare.com
11
CPC5622
The recommended components in the application
circuits yield a gain 0.26 dB at 2000 Hz. Clare
Application Note AN-117 Customize Caller ID Gain and
Ring Detect Voltage Threshold is a spreadsheet for trying
different component values in this circuit. Changing
the CID gain will also change the ringing detection
threshold and the timing of the polarity reversal
detection pulse, if used.
application note AN-157, Increased LITELINK III Transmit
Power for more information.
Figure 5. Differential and Single-ended Receive
Path Connections to LITELINK
LITELINK
Host-side CODEC
or Voice Circuit
For single-ended receive applications where only one
RX output is used, the snoop circuit gain can be
adjusted back to 0 dB by changing the value of the
snoop series resistors R6, R7, R44 and R45 from
1.8MΩ to 715kΩ. This change results in negligible
modification to the ringing detect threshold.
RX+
0.1uF
RX+
0.1uF
RX-
RX
RX-
0.1uF
RX+
3.3 Off-Hook Operation: OH=0
3.3.1 Receive Signal Path
Signals to and from the telephone network appear on
the tip and ring connections of the application circuit.
Receive signals are extracted from transmit signals by
the LITELINK two-wire to four-wire hybrid then
converted to infrared light by the receive path LED.
The intensity of the light is modulated by the receive
signal and coupled across the electrical isolation
barrier to the SELV side photodiode.
3.3.2 Transmit Signal Path
On the host equipment (low voltage) side of the
barrier, the receive signal is converted by a
photodiode into photocurrent. The photocurrent, a
linear representation of the receive signal, is amplified
and converted to a differential voltage output on RX+
and RX-.
The output of the optical amplifier is coupled to a
voltage-to-current converter via a transconductance
stage where the transmit signal modulates the
telephone line loop current. As in the receive path, the
transmit gain is calibrated at the factory, limiting
insertion loss to 0 ±0.4 dB.
Variations in gain are controlled to within ±0.4 dB by
factory gain trim.
Differential and single-ended transmit signals into
LITELINK should not exceed a signal level of 0 dBm
referenced to 600 Ω (or 2.2 VP-P). For output power
levels above 0dBm consult the application note
AN-157, Increased LITELINK III Transmit Power for more
information.
To accommodate single-supply operation, LITELINK
includes a small DC bias on the RX+ and RX- outputs
of 1.0 Vdc. Most applications should AC couple the
receive outputs as shown in Figure 5.
Transmit signals from the CODEC to the TX+ and TXpins of LITELINK should be coupled through
capacitors as shown in Figure 6 to minimize dc offset
errors. Differential transmit signals are converted to
single-ended signals within LITELINK then coupled to
the optical transmit amplifier in a manner similar to the
receive path.
LITELINK may be used for differential or single-ended
output as shown in Figure 5. Single-ended use will
produce 6 dB less signal output amplitude. Do not
exceed 0 dBm referenced to 600 Ω (2.2 VP-P) signal
output level with the standard application circuits. See
12
www.clare.com
Rev. 1.0
CPC5622
Figure 6. Differential and Single-ended Transmit
Path Connections to LITELINK
LITELINK
Host CODEC or
Transmit Circuit
0.1uf
TX-
0.1uf
TX+
-
TXA1
TXA2
refer to the guidelines for FET thermal management
provided in AN-146, Guidelines for Effective
LITELINK Designs.
3.6 AC Characteristics
+
3.6.1 Resistive Termination Applications
North American and Japanese telephone line AC
termination requirements are met with a resistive
600Ω ac 2-wire termination. For these applications
LITELINK’s 2-wire network termination impedance is
set by the resistor RZNT (R10) located at the ZNT pin
(pin 29) with a value of 301Ω.
LITELINK
Host CODEC or
Transmit Circuit
0.1uf
TXA1
N/C
TXTX+
+
3.6.2 Reactive Termination Applications
Many countries use a single-pole complex impedance
to model the telephone network transmission line
characteristic impedance as shown in the table below.
3.4 Initialization Requirement
Following Power-up
Line Impedance Model
OH must be de-asserted (set logic high) once after
power-up for at least 50ms to transfer internal gain
trim values within LITELINK. This would be normal
operation in most applications. Failure to comply with
this requirement will result in transmission gain errors
and possibly distortion.
3.5 DC Characteristics
The CPC5622 is designed for worldwide applications.
Modification of the values of the components at the
ZDC, DCS1, and DCS2 pins allow for control of the VI
slope characteristics of LITELINK. Selecting
appropriate resistor values for RZDC (R16) and
RDCS2 (R15) in the provided application circuits
enable compliance with various DC requirements.
3.5.1 Setting a Current Limit
LITELINK includes a telephone line current limit
feature that is selectable by choosing the desired
value for RZDC (R16) using the following formula:
RS
RP
Australia
China
TBR 21
RS
220 Ω
200 Ω
270 Ω
RP
820 Ω
680 Ω
750 Ω
CP
120 nF
100 nF
150 nF
CP
Proper gain and termination impedance circuits for a
complex impedance requires the use of complex
network on ZNT as shown in the “Reactive Termination
Application Circuit” on page 8.
3.6.3 Mode Pin Usage
Assert the MODE pin low (MODE = 0) introduces a
7 dB pad into the transmit path and adds 7 dB of gain
to the receive path. These changes compensate for
the gain changes made to the transmit and receive
paths necessary for reactive termination
implementations. Overall insertion loss with the
reactive termination application circuit and MODE
asserted is 0 dB.
Overall insertion loss with MODE de-asserted
(MODE = 1) for the resistive termination application
circuit is 0 dB.
1V - + 0.008A
I CL Amps = -----------R ZDC
Clare recommends using 8.2 Ω for RZDC for most
applications, limiting telephone line current to 130 mA.
Whether using the recommended value above or
when setting RZDC higher for a lower loop current limit
Rev. 1.0
www.clare.com
13
CPC5622
4. Regulatory Information
LITELINK III can be used to build products that comply
with the requirements of TIA/EIA/IS-968 (formerly
FCC part 68), FCC part 15B, TBR-21, EN60950,
UL1950, EN55022B, IEC950/IEC60950, CISPR22B,
EN55024, and many other standards. LITELINK
provides supplementary isolation. Metallic surge
requirements are met through the inclusion of a crow
bar protection device in the application circuit.
Longitudinal surge protection is provided by
LITELINK’s optical-across-the-barrier technology and
the use of high-voltage components in the application
circuit as needed.
The information provided in this document is intended
to inform the equipment designer but it is not sufficient
to assure proper system design or regulatory
compliance. Since it is the equipment manufacturer's
responsibility to have their equipment properly
designed to conform to all relevant regulations,
designers using LITELINK are advised to carefully
verify that their end-product design complies with all
applicable safety, EMC, and other relevant standards
and regulations. Semiconductor components are not
rated to withstand electrical overstress or electrostatic
discharges resulting from inadequate protection
measures at the board or system level.
5. LITELINK Design Resources
5.1 Clare, Inc. Design Resources
The Clare, Inc. web site has a wealth of information
useful for designing with LITELINK, including
application notes and reference designs that already
meet all applicable regulatory requirements. LITELINK
data sheets also contains additional application and
design information. See the following links:
LITELINK datasheets and reference designs
Application note AN-117 Customize Caller ID Gain
and Ring Detect Voltage Threshold
Application note AN-146, Guidelines for Effective
LITELINK Designs
Application note AN-155 Understanding LITELINK
Display Feature Signal Routing and Applications
14
www.clare.com
Rev. 1.0
CPC5622
6. LITELINK Performance
The following graphs show LITELINK performance
using the North American application circuit shown in
this data sheet.
Figure 10.Transmit THD on Tip and Ring
Figure 7. Receive Frequency Response at RX
2
0
0
-20
-2
-40
-4
-60
Gain
-6
dBm
THD+N
dB
-80
-8
-100
-10
-12
-120
-14
0
500
1000
1500
2000
2500
3000
3500
-140
4000
0
500
1000
1500
Frequency
2000
2500
3000
3500
4000
Frequency
Figure 8. Transmit Frequency Response at TX
Figure 11.Transhybrid Loss
2
0
0
-5
-10
-2
-15
-4
Gain
dBm
THL
-20
dB
-6
-25
-8
-30
-10
-35
-12
-40
0
500
1000
1500
2000
2500
3000
3500
4000
0
500
1000
1500
Frequency
2000
2500
3000
3500
4000
Frequency
Figure 12.Return Loss
Figure 9. Receive THD on RX
0
60
-20
55
-40
50
-60
THD+N
dB
Return
Loss 45
(dB)
-80
-100
40
-120
35
-140
0
500
1000
1500
2000
2500
3000
3500
4000
Frequency
30
0
500
1000
1500
2000
2500
3000
3500
4000
Frequency (Hz)
Rev. 1.0
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15
CPC5622
Figure 13.Snoop Circuit Frequency Response
5
0
-5
Gain (dBm ) -10
-15
-20
-25
0
500
1000
1500
2000
2500
3000
3500
4000
Frequency (Hz)
Figure 14.Snoop Circuit THD + N
500
1K
1.5K
2K
2.5K
3K
3.5K
4K
Hz
Figure 15.Snoop Circuit Common Mode
Rejection
+0
-2.5
-5
-7.5
-10
-12.5
-15
-17.5
-20
-22.5
-25
-27.5
CMRR
-30
(dBm) -32.5
-35
-37.5
-40
-42.5
-45
-47.5
-50
-52.5
-55
-57.5
-60
20
50
100
200
500
1K
2K
4K
Frequency (Hz)
16
www.clare.com
Rev. 1.0
CPC5622
7. Manufacturing Information
7.1 Mechanical Dimensions
Figure 16. Dimensions
4 Max.
32 PL
10.287 + .254
(0.405 + 0.010)
7.493 + 0.127
(0.295 + 0.005)
7.239 + 0.051
(0.285 + 0.002)
10.363 + 0.127
(0.408 + 0.005)
0.635 x 45
(0.025 x 45 )
1.016 Typ.
(0.040 Typ.)
0.203
(0.008)
0.635 + 0.076 TYP
(0.025 + 0.003 TYP)
1.981 + 0.051
(0.078 + 0.002)
2.134 Max.
(0.084 Max.)
DIMENSIONS
A
mm
(Inches)
0.102 MAX
(0.004 MAX)
0.330 + 0.051
(0.013 + 0.002)
9.525 + 0.076
(0.375 + 0.003)
Coplanar to A 0.08/(0.003) 32 PL.
Figure 17. Recommended Printed Circuit Board Layout
11.380
(0.448)
1.650
(0.065)
0.635
(0.025)
0.330
(0.013)
9.730
(0.383)
Rev. 1.0
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17
CPC5622
7.2 Tape and Reel Packaging
Figure 18. Tape and Reel Dimensions
330.2 DIA.
(13.00 DIA)
Top Cover
Tape Thickness
.102 MAX.
(.004 MAX)
W = 16.30 MAX
(0.642 MAX)
B0 = 10.70
(0.421)
Top Cover
Tape
Embossed Carrier
Embossment
K1 = 2.70
(0.106)
P = 12.00
(0.172)
A0 = 10.90
(0.430)
Feed Direction
K1 = 4.90
(0.193)
Dimensions
mm
(inches)
7.3 Manufacturing Assembly Processes
7.3.1 Moisture Reflow Sensitivity
7.3.2 Reflow Profile
Clare has characterized the moisture reflow sensitivity
of LITELINK using IPC/JEDEC standard J-STD-020.
Moisture uptake from atmospheric humidity occurs by
diffusion. During the solder reflow process, in which
the component is attached to the PCB, the whole body
of the component is exposed to high process
temperatures. The combination of moisture uptake
and high reflow soldering temperatures may lead to
moisture induced delamination and cracking of the
component. To prevent this, this component must be
handled in accordance with IPC/JEDEC standard
J-STD-020 per the labelled moisture sensitivity level
(MSL), level 3.
Recommended soldering processes are limited to
245°C component body temperature for 10 seconds.
7.3.3 Washing
Ultrasonic cleaning of LITELINK will cause permanent
damage to the device. Clare does not recommend
ultrasonic cleaning or the use of chlorinated solvents.
For additional information please visit www.clare.com
Clare, Inc. makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication and reserves the right to make
changes to specifications and product descriptions at any time without notice. Neither circuit patent licenses or indemnity are expressed or implied. Except as set
forth in Clare’s Standard Terms and Conditions of Sale, Clare, Inc. assumes no liability whatsoever, and disclaims any express or implied warranty relating to its
products, including, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringement of any intellectual property right.
The products described in this document are not designed, intended, authorized, or warranted for use as components in systems intended for surgical implant into
the body, or in other applications intended to support or sustain life, or where malfunction of Clare’s product may result in direct physical harm, injury, or death to a
person or severe property or environmental damage. Clare, Inc. reserves the right to discontinue or make changes to its products at any time without notice.
Specification: DS-CPC5622 - Rev. 1.0
Copyright © 2005, Clare, Inc.
LITELINK® is a registered trademark of Clare, Inc.
All rights reserved. Printed in USA.
2/18/2005
18