ANALOG DEVICES AD8143 Service Manual

High Speed, Triple Differential

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FEATURES

High speed

160 MHz large signal bandwidth

1000 V/μs slew rate @ G = 1, VO = 2 V p-p High CMRR: 65 dB @ 10 MHz High differential input impedance: 5 MΩ Input common-mode range: ±10.5 V (±12 V supplies) User-adjustable gain Wide power supply range: +5 V to ±12 V Fast settling: 8 ns to 1% Disable feature Low offset: ±3.4 mV on 5 V supply 2 on-chip comparators Small packaging: 32-lead, 5 mm × 5 mm LFCSP

APPLICATIONS

RGB video receivers KVM (keyboard-video-mouse) UTP (unshielded twisted pair) receivers

Receiver with Comparators

AD8143

PIN CONFIGURATION

DIS/PD

S–

GND

V

24

23

22

21

20

B

19

18

17

GND

REF_G

FB_G

IN+_G

IN–_G

REF_R

FB_R

GND

IN–_B

GND

32 31 30 29 28 27 26 25

1

2

3

4

5

6

7

8

9 10111213141516

GND

IN+_R

IN+_B

IN–_R

FB_B

REF_B

AD8143

A

GND

OUT_B

OUT_G

OUT_R

V

S+

COMPB_IN+

COMPB_IN–

GND

GENERAL DESCRIPTION

The AD8143 is a triple, low cost, differential-tosingle-ended receiver specifically designed for receiving red-green-blue (RGB) signals over twisted pair cable. It can also be used for receiving any type of analog signal or high speed data transmission. Two auxiliary comparators are provided to receive digital or sync signals. The AD8143 can be used in conjunction with the dr RGB over Category-5 UTP cable applications, including KVM.

The excellent common-mode rejection (65 dB @ 10 MH unshielded twisted pair cables in noisy environments.

AD8133 and AD8134 triple, differential

ivers to provide a complete low cost solution for

z) of the AD8143 allows for the use of low cost

COMPA_IN–

COMPA_IN+

Figure 1.

COMPA_OUT

COMPB_OUT

The AD8143 has a wide power supply range from single +5 V su

pply to ±12 V, which allows for a wide common-mode range. The wide common-mode input range of the AD8143 maintains signal integrity in systems where the ground potential is a few volts different between the drive and receive ends without the use of isolation transformers.

The AD8143 is stable at a gain of 1. Closed-loop gain is easily s

et using external resistors.

The AD8143 is available in a 5 mm × 5 mm, 32-lead LFCSP and

ted to work over the extended industrial temperature range

is ra of −40°C to +85°C.

05538-001

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her 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.

AD8143

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REVISION HISTORY

Basic Closed-Loop Gain Configurations ................................ 18

Terminating the Input................................................................ 19

Input Clamping........................................................................... 19

Printed Circuit Board Layout Considerations ....................... 20

Driving a Capacitive Load......................................................... 22

Power-Down ............................................................................... 22

Comparators ............................................................................... 22

Sync Pulse Extraction Using Comparators............................. 22

Outline Dimensions ....................................................................... 24

Ordering Guide .......................................................................... 24

10/05—Revision 0: Initial Version

Rev. 0 | Page 2 of 24

AD8143

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SPECIFICATIONS

VS = ±12 V, TA = 25°C, REF = 0 V, RL = 150 Ω, CL = 2 pF, G = 1, T

Table 1.

Parameter Conditions Min Typ Max Unit

DYNAMIC PERFORMANCE

−3 dB Bandwidth V V Bandwidth for 0.1dB Flatness V Slew Rate V Settling Time V V

= 0.2 V p-p 260 MHz

OUT

= 2 V p-p 160 MHz

OUT

= 0.2 V p-p 45 MHz

OUT

= 2 V p-p, RL = 1 kΩ 1000 V/μs

OUT

= 2 V p-p, 1% 8 ns

OUT

= 2 V p-p, 0.1% 31 ns

OUT

Output Overdrive Recovery 50 ns

NOISE/DISTORTION

Second Harmonic V Third Harmonic V Crosstalk V

= 2 V p-p, 1 MHz −70 dBc

OUT

= 2 V p-p, 1 MHz −80 dBc

OUT

= 1 V p-p, 10 MHz −70 dB

OUT

Input Voltage Noise (RTI) f ≥ 10 kHz 14 nV/√Hz Differential Gain Error NTSC, 200 IRE, RL ≥ 150 Ω 0.03 % Differential Phase Error NTSC, 200 IRE, RL ≥ 150 Ω 0.06 Degrees

INPUT CHARACTERISTICS

Common-Mode Rejection DC, VCM = −3.5 V to +3.5 V 86 90 dB V V Common-Mode Voltage Range V

= 1 V p-p, f = 10 MHz 65 dB

CM

= 1 V p-p, f = 100 MHz 28 dB

CM

− V

+IN

−IN

Differential Operating Range ±2.5 V Resistance Differential 5 MΩ Common-mode 3 MΩ Capacitance Differential 2 pF Common-mode 3 pF

DC PERFORMANCE

Open-Loop Gain V

= ±1 V 70 dB

OUT

Closed-Loop Gain Error DC 0.25 % Input Offset Voltage −4.3 +4.3 mV T

MIN

to T

MAX

Input Bias Current (+IN, −IN) −3.0 +3.0 μA Input Bias Current (REF, FB) −4.6 +3.7 μA Input Bias Current Drift T

MIN

to T

MAX

Input Offset Current (+IN, −IN, REF, FB) −2.55 +1.45 μA Input Offset Current Drift T

MIN

to T

MAX

OUTPUT PERFORMANCE

Voltage Swing R

= 1 kΩ −10.80 +10.82 V

LOAD

Output Current 40 mA Short Circuit Current Short to GND, source/sink 107/147 mA

COMPARATOR PERFORMANCE

V

OH

V

OL

3.135 3.3 V

0.2 0.255 V Hysteresis Width 41 mV Input Bias Current Input driven low 3.5 μA Propagation Delay, t Propagation Delay, t

PLH

PHL

RL = 10 kΩ 20 ns

RL = 10 kΩ 15 ns Output Rise Time 25% to 75%, RL = 10 kΩ 15 ns Output Fall Time 25% to 75%, RL = 10 kΩ 11 ns

MIN

to T

= −40°C to +85°C, unless otherwise noted.

MAX

= 0 V ±10.5 V

15 μV/°C

(+IN, −IN) 16 nA/°C

±3 nA/°C

Rev. 0 | Page 3 of 24

AD8143

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Parameter Conditions Min Typ Max Unit

POWER-DOWN PERFORMANCE

Power-Down V Power-Down V Power-Down I Power-Down I Power-Down Assert Time 0.5 μs

POWER SUPPLY

Operating Range 4.5 24 V Quiescent Current, Positive Supply 44.0 57.5 mA Quiescent Current, Negative Supply 37.0 51.0 mA PSRR, Positive Supply DC −75 −71 dB PSRR, Negative Supply DC −82 −81 dB

IH

IL

IH

IL

V V PD = V

CC

PD = GND 800 μA

1.0 μA

− 1.5 V

S+

− 2.5 V

S+

Rev. 0 | Page 4 of 24

AD8143

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VS = ±5 V, TA = 25°C, REF = 0 V, RL = 150 Ω, CL = 2 pF, G = 1, T

Table 2.

Parameter Conditions Min Typ Max Unit

DYNAMIC PERFORMANCE

−3 dB Bandwidth V V Bandwidth for 0.1dB Flatness V Slew Rate V Settling Time V V

= 0.2 V p-p 230 MHz

OUT

= 2 V p-p 130 MHz

OUT

= 0.2 V p-p 45 MHz

OUT

= 2 V p-p, RL = 1 kΩ 1000 V/μs

OUT

= 2 V p-p, 1% 10 ns

OUT

= 2 V p-p, 0.1% 23 ns

OUT

Output Overdrive Recovery 50 ns

NOISE/DISTORTION

Second Harmonic V Third Harmonic V Crosstalk V

= 1 V p-p, 1 MHz −68 dBc

OUT

= 1 V p-p, 1 MHz −82 dBc

OUT

= 1 V p-p, 10 MHz −70 dB

OUT

Input Voltage Noise (RTI) f ≥ 10 kHz 14 nV/√Hz Differential Gain Error NTSC, 200 IRE, RL ≥ 150 Ω 0.3 % Differential Phase Error NTSC, 200 IRE, RL ≥ 150 Ω 0.6 Degrees

INPUT CHARACTERISTICS

Common-Mode Rejection DC, VCM = −3.5 V to +3.5 V 84 90 dB V V Common-Mode Voltage Range V

= 1 V p-p, f = 10 MHz 65 dB

CM

= 1 V p-p, f = 100 MHz 28 dB

CM

− V

+IN

−IN

Differential Operating Range ±2.5 V Resistance Differential 5 MΩ Common-mode 3 MΩ Capacitance Differential 2 pF Common-mode 3 pF

DC PERFORMANCE

Open-Loop Gain V

= ±1 V 70 dB

OUT

Closed-Loop Gain Error DC 0.25 % Input Offset Voltage −3.7 +3.7 mV T

MIN

to T

MAX

Input Bias Current (+IN, −IN) −3.0 +2.7 μA Input Bias Current (REF, FB) −4.3 +3.0 μA Input Bias Current Drift T

MIN

to T

MAX

Input Offset Current (+IN, −IN, REF, FB) −2.9 1.9 μA Input Offset Current Drift T

MIN

to T

MAX

OUTPUT PERFORMANCE

Voltage Swing R

= 150 Ω −3.53 +3.53 V

LOAD

Output Current 40 mA Short Circuit Current Short to GND, source/sink 107/147 mA

COMPARATOR PERFORMANCE

V

OH

V

OL

RL = 10 kΩ 3.02 3.14 V

RL = 10 kΩ 0.19 0.25 V Hysteresis Width 32 mV Input Bias Current Input driven low 3.5 μA Propagation Delay, t Propagation Delay, t

PLH

PHL

20 ns

15 ns Output Rise Time 10% to 90% 15 ns Output Fall Time 10% to 90% 11 ns

to T

MIN

= −40°C to +85°C, unless otherwise noted.

MAX

= 0 V ±3.8 V

15 μV/°C

(+IN, −IN, REF, FB) 16 nA/°C

±3 nA/°C

Rev. 0 | Page 5 of 24

AD8143

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Parameter Conditions Min Typ Max Unit

POWER-DOWN PERFORMANCE

Power-Down V Power-Down V Power-Down I Power-Down I Power-Down Assert Time 0.5 μs

POWER SUPPLY

Operating Range 4.5 24 V Quiescent Current, Positive Supply 39.0 49.5 mA Quiescent Current, Negative Supply 34.5 43.5 mA PSRR, Positive Supply DC −80 −74 dB PSRR, Negative Supply DC −80 −75 dB

IH

IL

IH

IL

V V PD = V

CC

PD = GND 230 μA

1 μA

− 1.5 V

S+

− 2.5 V

S+

Rev. 0 | Page 6 of 24

AD8143

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VS = 5 V, TA = 25°C, REF = +2.5 V, RL = 150 Ω, CL = 2 pF, G = 1, T

Table 3.

Parameter Conditions Min Typ Max Unit

DYNAMIC PERFORMANCE

−3 dB Bandwidth V V Bandwidth for 0.1dB Flatness V Slew Rate V Settling Time V V

= 0.2 V p-p 220 MHz

OUT

= 2 V p-p 125 MHz

OUT

= 0.2 V p-p 45 MHz

OUT

= 2 V p-p, RL = 1 kΩ 1000 V/μs

OUT

= 2 V p-p, 1% 10 ns

OUT

= 2 V p-p, 0.1% 23 ns

OUT

Output Overdrive Recovery 50 ns

NOISE

Crosstalk V

= 1 V p-p, 10 MHz −70 dB

OUT

Input Voltage Noise (RTI) f ≥ 10 kHz 14 nV/√Hz

INPUT CHARACTERISTICS

Common-Mode Rejection DC, VCM = −3.5 V to +3.5 V 76 90 dB V V Common-Mode Voltage Range V

= 1 V p-p, f = 10 MHz 65 dB

CM

= 1 V p-p, f = 100 MHz 32 dB

CM

− V

+IN

= 0 V 1.3 to 3.7 V

−IN

Differential Operating Range ±2.5 V Resistance Differential 5 MΩ Common-mode 3 MΩ Capacitance Differential 2 pF Common-mode 3 pF

DC PERFORMANCE

Open-Loop Gain V

= ±1 V 70 dB

OUT

Closed-Loop Gain Error DC, measured at G = 11 0.25 % Input Offset Voltage −3.4 +3.4 mV T

MIN

to T

MAX

Input Bias Current (+IN, −IN) −3 +2.7 μA Input Bias Current (REF, FB) −4.5 +3 μA Input Bias Current Drift T

MIN

to T

MAX

Input Offset Current (+IN, −IN, REF, FB) −2.3 +1.3 μA Input Offset Current Drift T

MIN

to T

MAX

OUTPUT PERFORMANCE

Voltage Swing R

= 150 Ω 0.88 3.58 V

LOAD

Output Current 40 mA Short Circuit Current Short to GND 150 mA

COMPARATOR PERFORMANCE

V

OH

V

OL

RL = 10 kΩ 3.02 V

RL = 10 kΩ 0.25 V Hysteresis Width 32 mV Input Bias Current Input driven low 3.5 μA Propagation Delay, t Propagation Delay, t

PLH

PHL

20 ns

15 ns Output Rise Time 10% to 90% 15 ns Output Fall Time 10% to 90% 11 ns

POWER-DOWN PERFORMANCE

Power-Down V Power-Down V Power-Down I Power-Down I

IH

IL

IH

IL

V

PD = V

CC

PD = GND 230 μA

Power-Down Assert Time 0.5 μs

MIN

to T

= −40°C to +85°C, unless otherwise noted.

MAX

15 μV/°C

(+IN, −IN, REF, FB) 16 nA/°C

±3 nA/°C

− 1.5 V

S+

− 2.5 V

S+

1 μA

Rev. 0 | Page 7 of 24

AD8143

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Parameter Conditions Min Typ Max Unit

POWER SUPPLY

Operating Range 4.5 24 V Quiescent Current, Positive Supply 31.5 38.8 mA PSRR, Positive Supply DC −86 −76 dB

Rev. 0 | Page 8 of 24

ANALOG DEVICES AD8143 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

FEATURES

APPLICATIONS

PIN CONFIGURATION

GENERAL DESCRIPTION

TABLE OF CONTENTS

REVISION HISTORY

SPECIFICATIONS