3.3 V power supply
High impedance outputs on power-down
Low power design: typically 3 mW (quiescent)
Interoperable with existing 5 V LVDS drivers
Accepts small swing (310 mV typical) differential signal
levels
Supports open, short, and terminated input fail-safe
0 V to −100 mV threshold region
Conforms to TIA/EIA-644 LVDS standard
Industrial operating temperature range: −40°C to +85°C
Available in surface-mount (SOIC) package
APPLICATIONS
Point-to-point data transmission
Multidrop buses
Clock distribution networks
Backplane receivers
Differential Line Receiver
ADN4664
FUNCTIONAL BLOCK DIAGRAM
CC
ADN4664
R
IN1+
R
IN1–
R
IN2+
R
IN2–
GND
Figure 1.
R
R
OUT1
OUT2
07961-001
GENERAL DESCRIPTION
The ADN4664 is a dual, CMOS, low voltage differential
signaling (LVDS) line receiver offering data rates of over
400 Mbps (200 MHz) and ultralow power consumption.
It features a flow-through pinout for easy PCB layout and
separation of input and output signals.
The device accepts low voltage (310 mV typical) differential
input signals and converts them to a single-ended 3 V TTL/
CMOS logic level.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
The ADN4664 and its companion driver, the ADN4663, offer a
new solution to high speed, point-to-point data transmission,
and a low power alternative to emitter-coupled logic (ECL) or
positive emitter-coupled logic (PECL).
VDD = 3.0 V to 3.6 V; CL = 15 pF to GND; all specifications T
Table 1.
1
Parameter
Symbol Min Typ
LVDS INPUT
High Threshold at R
Low Threshold at R
Input Current at R
INx+
INx+
INx+
3
, R
INx−
3
, R
V
INx−
, R
I
INx−
VTH +100 mV VCM = 1.2 V, 0.05 V, 2.95 V
−100 mV VCM = 1.2 V, 0.05 V, 2.95 V
TL
−10 ±1 +10 μA VIN = 2.8 V, VCC = 3.6 V or 0 V
IN
−10 ±1 +10 μA VIN = 0 V, VCC = 3.6 V or 0 V
−20 ±1 +20 μA VIN = 3.6 V, VCC = 0 V
OUTPUT
Output High Voltage VOH 2.7 3.1 V IOH = −0.4 mA, VID = +200 mV
2.7 3.1 V IOH = −0.4 mA, input terminated
2.7 3.1 V IOH = −0.4 mA, input shorted
Output Low Voltage VOL 0.3 0.5 V IOL = 2 mA, VID = −200 mV
Output Short-Circuit Current
4
I
−15 −47 −100 mA Enabled, V
OS
Input Clamp Voltage VCL −1.5 −0.8 V ICL = −18 mA
POWER SUPPLY
No Load Supply Current ICC 5.4 9 mA Inputs open
ESD PROTECTION
R
, R
INx+
All Pins Except R
1
Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground unless otherwise specified.
2
All typicals are given for: VCC = 3.3 V, TA = 25°C.
3
VCC is always higher than R
specifications, the common voltage range is 0.1 V to 2.3 V.
4
Output short-circuit current (IOS) is specified as magnitude only; the minus sign indicates direction only. Only one output should be shorted at a time. Do not exceed
maximum junction temperature specification.
Pins ±15 kV Human body model
INx−
, R
INx+
±4 kV Human body model
INx−
and R
INx+
voltage. R
INx−
INx−
and R
are allowed to have a voltage range of −0.2 V to VCC − VID/2. However, to be compliant with ac
INx+
MIN
to T
, unless otherwise noted.
MAX
2
Max Unit Conditions/Comments
OUT
= 0 V
Rev. 0 | Page 3 of 12
ADN4664
AC CHARACTERISTICS
VDD = 3.0 V to 3.6 V; C
1
= 15 pF to GND; all specifications T
L
MIN
to T
, unless otherwise noted.
MAX
Table 2.
Parameter Symbol Min Typ2Max Unit Conditions/Comments
Differential Propagation Delay High to Low t
Differential Propagation Delay Low to High t
Differential Pulse Skew |t
Differential Channel-to-Channel Skew
Rise Time t
Fall Time t
Maximum Operating Frequency
1
CL includes probe and jig capacitance.
2
All typicals are given for VCC = 3.3 V, TA = 25°C.
3
Generator waveform for all tests unless otherwise specified: f = 1 MHz, ZO = 50 Ω, t
4
t
is the magnitude difference in differential propagation delay time between the positive going edge and the negative going edge of the same channel.
SKD1
5
Channel-to-channel skew, t
same chip with any event on the inputs.
6
t
, part-to-part skew, is the differential channel-to-channel skew of any event between devices. This specification applies to devices at the same VCC and within 5°C of
SKD3
each other within the operating temperature range.
7
t
, part-to-part skew, is the differential channel-to-channel skew of any event between devices. This specification applies to devices over recommended operating
SKD4
temperature and voltage ranges, and across process distribution. t
, is the defined as the difference between the propagation delay of one channel and the propagation delay of the other channel on the
= t
TLH
1.0 2.15 2.5 ns CL = 15 pF, VID = 200 mV (see Figure 2 and Figure 3)
PHLD
1.0 2.03 2.5 ns CL = 15 pF, VID = 200 mV (see Figure 2 and Figure 3)
PLHD
0 80 400 ps CL = 15 pF, VID = 200 mV (see Figure 2 and Figure 3)
SKD1
t
0 100 500 ps CL = 15 pF, VID = 200 mV (see Figure 2 and Figure 3)
SKD2
1.0 ns CL = 15 pF, VID = 200 mV (see Figure 2 and Figure 3)
SKD3
1.5 ns CL = 15 pF, VID = 200 mV (see Figure 2 and Figure 3)
SKD4
510 800 ps CL = 15 pF, VID = 200 mV (see Figure 2 and Figure 3)
TLH
445 800 ps CL = 15 pF, VID = 200 mV (see Figure 2 and Figure 3)
THL
200 250 MHz All channels switching
MAX
is defined as |maximum − minimum| differential propagation delay.
< 1 ns (0% to 100%), 50% duty cycle, differential (1.05 V to 1.35 V peak-to-peak). Output criteria: 60%/40% duty
THL
SKD4
and t
TLH
(0% to 100%) ≤ 3 ns for R
THL
INx+
, R
INx−
3
.
Rev. 0 | Page 4 of 12
ADN4664
V
Test Circuits and Timing Diagrams
CC
R
SIGNAL
GENERATOR
CL = LOAD AND TEST JIG CAPACIT ANCE
Figure 2. Test Circuit for Receiver Propagation Delay and Transition Time
R
50Ω 50Ω
INx+
INx–
RECEIVER IS
ENABLED
R
OUTx
C
L
7961-002
R
R
R
INx–
INx+
OUTx
0V (DIFFERE NTIAL)
t
PLHD
1.5V
20%
t
TLH
80%
VID= 200mV
80%
t
PHLD
1.2V
1.5V
t
THL
20%
1.3V
1.1V
V
V
OH
OL
07961-003
Figure 3. Receiver Propagation Delay and Transition Time Waveforms
Rev. 0 | Page 5 of 12
ADN4664
ABSOLUTE MAXIMUM RATINGS
TA = 25°C, unless otherwise noted.
Table 3.
Parameter Rating
VCC to GND −0.3 V to +4 V
Input Voltage (R
Output Voltage (R
Operating Temperature Range
Industrial Temperature Range −40°C to +85°C
Storage Temperature Range −65°C to +150°C
Junction Temperature (TJ max) 150°C
Power Dissipation (TJ max − TA)/θJA
SOIC Package
θJA Thermal Impedance 149.5°C/W
Reflow Soldering Peak Temperature
Pb-Free 260°C ± 5°C
, R
) to GND −0.3 V to V
INx+
INx−
) to GND −0.3 V to VCC + 0.3 V
OUTx
+ 3.9 V
CC
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
Rev. 0 | Page 6 of 12
ADN4664
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
R
R
R
R
IN1–
IN1+
IN2+
IN2–
1
ADN4664
2
3
TOP VIEW
(Not to S cale)
4
V
8
CC
R
7
OUT1
R
6
OUT2
5
GND
07961-004
Figure 4. Pin Configuration
Table 4. Pin Function Descriptions
Pin No. Mnemonic Description
1 R
2 R
3 R
4 R
IN1−
IN1+
IN2+
IN2−
Receiver Channel 1 Inverting Input. When this input is more negative than R
, R
more positive than R
IN1+
OUT1
is low.
Receiver Channel 1 Noninverting Input. When this input is more positive than R
more negative than R
IN1−
, R
OUT1
is low.
Receiver Channel 2 Noninverting Input. When this input is more positive than R
, R
more negative than R
IN2−
OUT2
is low.
Receiver Channel 2 Inverting Input. When this input is more negative than R
, R
more positive than R
IN2+
OUT2
is low.
5 GND Ground reference point for all circuitry on the part.
6 R
OUT2
Receiver Channel 2 Output (3 V TTL/CMOS). If the differential input voltage between R
output is high. If the differential input voltage is negative, this output is low.
7 R
OUT1
Receiver Channel 1 Output (3 V TTL/CMOS). If the differential input voltage between R
output is high. If the differential input voltage is negative, this output is low.
8 VCC Power Supply Input. This part can be operated from 3.0 V to 3.6 V.
IN1+
IN2+
, R
is high. When this input is
OUT1
, R
IN1−
IN2−
, R
is high. When this input is
OUT1
, R
is high. When this input is
OUT2
is high. When this input is
OUT2
and R
IN2+
IN1+
and R
IN2−
is positive, this
IN−
is positive, this
Rev. 0 | Page 7 of 12
ADN4664
–
V
TYPICAL PERFORMANCE CHARACTERISTICS
3.6
I
= –400µA
3.5
(V)
OH
3.4
3.3
3.2
3.1
OUTPUT HIGH VOLTAG E, V
3.0
2.9
LOAD
T
= 25°C
A
V
= 200mV
ID
3.03.13.23.33.43.53.6
POWER SUPPLY VOLTAGE, VCC (V)
Figure 5. Output High Voltage vs. Power Supply Voltage
07961-007
0
V
= 0V
OUT
–5
T
=25°C
= 25°C
A
–10
(mV)
–15
TH
–20
–25
–30
–35
–40
THRESHOLD VOLTAGE,
–45
–50
A
3.03.13.23.33.43.53.6
POWER SUPPLY VOLTAGE, VCC (V)
Figure 8. Threshold Voltage vs. Power Supply Voltage
7961-011
33.60
I
= 2mA
LOAD
T
33.55
(mV)
33.50
OL
33.45
33.40
33.35
OUTPUT LOW VOLTAGE, V
33.30
33.25
3.03.13.23.33.43.53.6
= 25°C
A
V
= –200mV
ID
POWER SUPPLY VOLTAGE, VCC (V)
7961-008
Figure 6. Output Low Voltage vs. Power Supply Voltage
35
V
= 0V
–37
(mA)
OS
–39
–41
–43
–45
–47
–49
–51
–53
OUTPUT SHO RT-CIRCUIT CURRENT, I
–55
3.03.13.23.33.43.53.6
Figure 7. Output Short-Circuit Current vs. Power Supply Voltage
OUT
T
= 25°C
A
POWER SUPPLY VOLTAGE, VCC (V)
7961-009
50
TA = 25°C
45
40
(mA)
CC
35
30
25
20
15
10
POWER SUPPLY CURRENT, I
= 3.3V
V
CC
= 200mV
V
ID
= 15pF
C
L
BOTH CHANNELS SWI TCHING
5
0
0.010.11101001000
FREQUENCY (MHz)
ONE CHANNEL SWI TCHING
Figure 9. Power Supply Current vs. Frequency
10
9
VCC = 3.3V
V
= 200mV
ID
C
= 15pF
8
L
(mA)
FREQUENCY = 1MHz
CC
7
BOTH CHANNELS SWITCHING
6
5
4
3
2
POWER SUPPLY CURRENT, I
1
0
–40–1510356085
AMBIENT TEM PE RATURE (°C)
Figure 10. Power Supply Current vs. Ambient Temperature
07961-023
07961-024
Rev. 0 | Page 8 of 12
ADN4664
2.5
VCC= 3.3V
= 200mV
V
ID
2.4
FREQUENCY = 200M Hz
= 15pF
C
L
2.3
(ns)
2.2
PHLD
t
,
2.1
PLHD
t
t
PHLD
t
PLHD
2.0
1.9
DIFFERENTIAL PROPAGATION DELAY,
1.8
–40–1510358560
AMBIENT TEMPERATURE, T
A
(°C)
Figure 11. Differential Propagation Delay vs. Ambient Temperature
4.0
TA= 25°C
FREQUENCY = 200M Hz
V
= 200mV
ID
3.5
C
= 15pF
L
3.0
(ns)
PHLD
t
,
2.5
PLHD
t
2.0
DIFFERENTIAL PROPAGATION DELAY,
t
PLHD
t
PHLD
6.0
VCC = 3.3V
5.5
C
= 15pF
L
FREQUENCY = 200M Hz
5.0
V
= 1.2V
CM
4.5
(ps)
4.0
3.5
PHLD
, t
3.0
PLHD
t
2.5
2.0
DIFFERENT IAL PROPAG ATION DEL AY,
1.5
1.0
7961-014
00.51.01.52.02.53.0
DIFFERENTIAL INPUT VOLTAGE, V
t
PLHD
t
PHLD
07961-025
(V)
ID
Figure 14. Differential Propagation Delay vs. Differential Input Voltage
250
TA= 25°C
= 200mV
V
ID
200
FREQUENCY = 200MHz
C
= 15pF
(ps)
SKEW
t
DIFFERENTIAL SKEW,
L
150
100
50
0
–50
1.5
00.51.01.53.02.0
COMMON-MODE VOLTAGE, V
2.5
(V)
CM
Figure 12. Differential Propagation Delay vs. Common-Mode Voltage
2.30
2.25
2.20
2.15
(ns)
2.10
PHLD
t
,
2.05
PLHD
t
2.00
1.95
DIFFERENTIAL PROPAG ATION DEL AY,
1.90
1.85
3.03.13.23. 33.63.4
POWER SUPPLY VOLTAGE, V
TA= 25°C
V
= 200mV
ID
FREQUENCY = 200M Hz
C
= 15pF
L
t
PHLD
t
PLHD
3.5
(V)
CC
Figure 13. Differential Propagation Delay vs. Power Supply Voltage
–100
3.03.13. 23.33. 43.53. 6
7961-015
POWER SUPPLY VOLTAGE, VCC (V)
7961-018
Figure 15. Differential Skew vs. Power Supply Voltage
160
V
= 3.3V
CC
VID= 200mV
140
FREQUENCY = 200MHz
C
= 15pF
120
100
L
(ps)
SKEW
t
80
60
40
DIFFERENTIAL SKEW,
20
0
–40–1510356085
7961-016
AMBIENT TEMPERATURE, TA (°C)
7961-019
Figure 16. Differential Skew vs. Ambient Temperature
Rev. 0 | Page 9 of 12
ADN4664
600
580
560
(ps)
540
THL
t
,
520
TLH
t
500
480
460
440
TRANSITION TIME,
420
400
3.03.13.23.33.63.4
Figure 17. Transition Time vs. Power Supply Voltage
VCC= 3.3V
V
ID
FREQUENCY = 25M Hz
= 15pF
C
t
TLH
t
THL
POWER SUPPLY VOLTAGE, V
L
= 200mV
(V)
CC
3.5
1800
TA = 25°C
1600
V
= 3.3V
CC
V
= 200mV
(ps)
1400
THL
, t
1200
TLH
1000
TRANSITIO N TIME, t
7961-020
ID
FREQUENCY = 1MHz
t
800
600
400
200
1015202530354045
TLH
t
THL
LOAD (pF)
07961-027
Figure 20. Transition Time vs. Load
600
VCC= 3.3V
= 200mV
V
ID
FREQUENCY = 200MHz
550
(ps)
THL
t
,
500
TLH
t
450
400
TRANSITIO N TIME,
350
= 15pF
C
L
t
TLH
t
THL
–40–1510356085
AMBIENT TEMPERATURE, T
A
(°C)
Figure 18. Transition Time vs. Ambient Temperature
3.1
2.9
2.7
2.5
(ns)
2.3
PHLD
t
,
2.1
PLHD
t
TA = 25°C
1.9
DIFFERENT IALPROPAG ATIONDEL AY,
1.7
1.5
= 3.3V
V
CC
= 200mV
V
ID
FREQUENCY = 1MHz
1015202530354045
t
t
PHLD
PLHD
LOAD (pF)
Figure 19. Differential Propagation Delay vs. Load at 1 MHz
2.9
2.7
2.5
(ns)
2.3
PHLD
t
,
2.1
PLHD
t
1.9
TA = 25°C
V
CC
V
ID
1.7
DIFFERENT IALPROPAG ATIONDEL AY,
7961-021
FREQUENCY = 200MHz
1.5
1015202530354045
= 3.3V
= 200mV
t
PHLD
t
PLHD
LOAD (pF)
07961-028
Figure 21. Differential Propagation Delay vs. Load at 200 MHz
1800
TA = 25°C
V
1600
1400
(ps)
THL
1200
, t
TLH
1000
800
600
400
TRANSITIO N TIME, t
200
07961-026
= 3.3V
CC
V
= 200mV
ID
FREQUENCY = 200MHz
t
TLH
t
THL
0
1015202530354045
LOAD (pF)
07961-029
Figure 22. Transition Time vs. Load at 200 MHz
Rev. 0 | Page 10 of 12
ADN4664
V
V
THEORY OF OPERATION
The ADN4664 is a dual line receiver for low voltage differential
signaling. It takes a differential input signal of 310 mV typically
and converts it into a single-ended 3 V TTL/CMOS logic signal.
A differential current input signal, received via a transmission
medium, such as a twisted pair cable, develops a voltage across
a terminating resistor, R
. This resistor is chosen to match the
T
characteristic impedance of the medium, typically around
100
Ω. The differential voltage is detected by the receiver and
converted back into a single-ended logic signal.
When the noninverting receiver input, R
respect to the inverting input R
from R
receiver input R
input R
R
OUTx
INx+
INx−
to R
), then R
INx−
is negative with respect to the inverting
INx+
(current flows through RT from R
is low.
(current flows through RT
INx−
is high. When the noninverting
OUTx
, is positive with
INx+
to R
INx−
INx+
), then
The ADN4664 differential line receiver is capable of receiving
signals of 100 mV over a ±1 V common-mode range centered
around 1.2 V. This relates to the typical driver offset voltage
value of 1.2 V. The signal originating from the driver is centered
around 1.2 V and may shift ±1 V around this center point. This
±1 V shifting may be caused by a difference in the ground
potential of the driver and receiver, the common-mode effect
of coupled noise, or both.
Using the ADN4663 as a driver, the received differential current
is between 2.5 mA and 4.5 mA (typically 3.1 mA), developing
between 250 mV and 450 mV across a 100
Ω termination resis-
tor. The received voltage is centered around the receiver offset of
1.2 V. In other words, the noninverting receiver input is typically
(1.2 V + [310 mV/2]) = 1.355 V, and the inverting receiver input is
(1.2 V − [310 mV/2]) = 1.045 V for Logic 1. For Logic 0 the inverting
and noninverting input voltages are reversed. Note that because
the differential voltage reverses polarity, the peak-to-peak voltage
swing across R
is twice the differential voltage.
T
Current mode signaling offers considerable advantages over
voltage mode signalling, such as RS-422. The operating current
remains fairly constant with increased switching frequency,
whereas with voltage mode drivers the current increases
exponentially in most cases. This is caused by the overlap as
internal gates switch between high and low, which causes currents to flow from V
to ground. A current mode device simply
CC
reverses a constant current between its two outputs, with no
significant overlap currents.
This is similar to emitter-coupled logic (ECL) and positive emittercoupled logic (PECL), but without the high quiescent current of
ECL and PECL.
APPLICATIONS INFORMATION
Figure 23 shows a typical application for point-to-point data
transmission using the ADN4663 as the driver.
3.3
+
0.1µF
V
CC
ADN4663
D
INy
10µF
TANTALUM
D
OUTy+RINx+
R
100Ω
T
D
GND
Figure 23. Typical Application Circuit
OUTy–
R
INx–
0.1µF
V
CC
ADN4664
GND
3.3
+
10µF
TANTALUM
R
OUTx
07961-119
Rev. 0 | Page 11 of 12
ADN4664
OUTLINE DIMENSIONS
5.00 (0.1968)
4.80 (0.1890)
4.00 (0.1574)
3.80 (0.1497)
0.25 (0.0098)
0.10 (0.0040)
COPLANARITY
0.10
SEATING
CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS
(IN PARENTHESES) ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR
REFERENCE ONLY AND ARE NOT APPROPRIATE FOR USE IN DESIG N.
85
1
1.27 (0.0500)
BSC
PLANE
COMPLIANT TO JEDEC STANDARDS MS-012-A A
6.20 (0.2441)
5.80 (0.2284)
4
1.75 (0.0688)
1.35 (0.0532)
0.51 (0.0201)
0.31 (0.0122)
8°
0°
0.25 (0.0098)
0.17 (0.0067)
0.50 (0.0196)
0.25 (0.0099)
1.27 (0.0500)
0.40 (0.0157)
45°
012407-A
Figure 24. 8-Lead Standard Small Outline Package [SOIC_N]
Narrow Body
(R-8)
Dimensions shown in millimeters and (inches)
ORDERING GUIDE
Model Temperature Range Package Description Package Option
ADN4664BRZ1 −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8
ADN4664BRZ-REEL71 −40°C to +85°C 8-Lead Standard Small Outline Package [SOIC_N] R-8