MAXIM MAX4444ESE

19-1543; Rev 0; 10/99
ILABLE
N KIT AVA
EVALUATIO
Ultra-High-Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable
Features
♦ 5000V/µs Slew Rate (MAX4444)
♦ +2V/V Internally Fixed Gain (MAX4444)
♦ External Gain Selection
(MAX4445, AVCL ≥ +2V/V)
♦ 550MHz -3dB Bandwidth
♦ -60dB SFDR at 5MHz
♦ Low Differential Gain/Phase: 0.07%/0.05°
♦ Low Noise: 25nV/√Hz at fIN = 100kHz
♦ Low-Power Disable Mode Reduces Quiescent
Current to 3.5mA
Applications
Ordering Information
Differential-to-Single-Ended Conversion
Twisted-Pair to Coaxial Converter
PART
High-Speed Instrumentation Amplifier
Data Acquisition
TEMP. RANGE
PIN-PACKAGE
MAX4444ESE
-40°C to +85°C
16 Narrow SO
MAX4445ESE
-40°C to +85°C
16 Narrow SO
Medical Instrumentation
High-Speed Differential Line Receiver
Typical Operating Circuit
+5V
TOP VIEW
0.1µF
IN+
SIGNAL
INPUT
Pin Configuration
VCC 1
16 GND
VCC 2
15 OUT
14 VEE
IN- 3
EN
75Ω
VCC
N.C. (RG) 4
OUTPUT
OUT
MAX4444
VEE
75Ω
IN- REF
GND
0.1µF
N.C. (RG) 5
MAX4444
MAX4445
13 VEE
12 VEE
IN+ 6
11 VEE
VEE 7
10 REF
VEE 8
9
EN
SO
-5V
( ) ARE FOR MAX4445 ONLY.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX4444/MAX4445
General Description
The MAX4444/MAX4445 differential line receivers offer
unparalleled high-speed, low-distortion performance.
Using a three op amp instrumentation amplifier architecture, these ICs have symmetrical differential inputs
and a single-ended output. They operate from ±5V
supplies and are capable of driving a 100Ω load to
±3.7V. The MAX4444 has an internally set closed-loop
gain of +2V/V, while the MAX4445 is compensated for
gains of +2V/V or greater, set by an external resistor. A
low-power enable mode reduces current consumption
to 3.5mA.
Using current-feedback techniques, the MAX4444/
MAX4445 achieve a 550MHz bandwidth while maintaining up to a 5000V/µs slew rate. Excellent differential
gain/phase and noise specifications make these amplifiers ideal for a wide variety of video and RF signal-processing applications. An evaluation kit is available to
speed design.
MAX4444/MAX4445
Ultra-High-Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable
ABSOLUTE MAXIMUM RATINGS
VCC to VEE ...........................................................................+12V
Voltage on IN+, IN-, EN, OUT+,
OUT-, RG, REF..............................(VEE - 0.3V) to (VCC + 0.3V)
Current Into IN+, IN-, RG, EN .............................................20mA
Output Short-Circuit Duration ...........................Indefinite to GND
Continuous Power Dissipation (TA = +70°C)
16-Pin Narrow SO (derate 20mW/°C above +70°C) ...1600mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VCC = +5V, VEE = -5V, VEN = ≥2V, VCM = 0 , RL = ∞, REF = GND, AVCL = +2V/V, TA = TMIN to TMAX, unless otherwise noted. Typical
values are at TA = +25°C.)
PARAMETER
SYMBOL
Operating Supply Voltage
Range
CONDITIONS
MIN
TYP
±4.5
±5.5
V
2.9
V
VCM
Guaranteed by CMRR test
-2.9
Differential Input Voltage Range
VDIFF
Guaranteed by output swing test
-1.7
Input Offset Voltage
VOS
15
TCVOS
12
Input Bias Current
IOS
Differential Input Resistance
RIN
Gain
10
IB
Input Offset Current
AV
-2.9V ≤ VIN ≤ +2.9V
-2.9V ≤ VCM ≤ +2.9V
-3V ≤ VOUT ≤ +3V
Gain Error
-3V ≤ VOUT ≤ +3V,
RL = 100Ω
Gain-Error Drift
RL = 100Ω
Output Voltage Swing
VOUT
UNITS
Guaranteed by PSRR test
Input Common-Mode Voltage
Range
Input Offset-Voltage
Temperature Coefficient
MAX
MAX4444
MAX4445
MAX4444
V
65
mV
µV/°C
55
µA
0.25
45
82
170
2
(1 + 600/RG)
0.5
2
µA
2.6
MAX4445
1.7
8
0.003
RL = 100Ω
±3.4
±3.7
RL = 50Ω
±3.3
±3.6
kΩ
V/V
%
%/°C
V
Output Current Drive
IOUT
RL = 30Ω
90
120
mA
Power-Supply Rejection Ratio
PSRR
VS = ±4.5V to ±5.5V
53
70
dB
Common-Mode Rejection Ratio
CMRR
-2.9V ≤ VCM ≤ +2.9V
40
55
dB
Disable Output Resistance
ROUT(OFF) VEN = 0, -3.5V ≤ VOUT ≤ +3.5V, MAX4444
1.8
V
10
µA
2.6
10
µA
41
55
3.5
5.5
VIL
EN Logic High Threshold
VIH
EN Logic Input Low Current
IIL
VEN = 0
2.2
EN Logic Input High Current
IIH
VEN = 5V
VIN = 0, VEN = 5V
VIN = 0, VEN = 0
Quiescent Current
2
IQ
kΩ
0.8
EN Logic Low Threshold
2
V
_______________________________________________________________________________________
mA
Ultra-High Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable
MAX4444/MAX4445
AC ELECTRICAL CHARACTERISTICS
(VCC = +5V, VEE = -5V, VEN = 5V, RL = 100Ω, REF = GND, AVCL = +2V/V, TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITION
MIN
TYP
MAX
UNITS
Small-Signal -3dB Bandwidth
BWSS
VOUT = 100mVp-p
550
MHz
Large-Signal -3dB Bandwidth
BWLS
VOUT = 2Vp-p
500
MHz
VOUT = 100mVp-p
80
MHz
0.1dB Gain Flatness
VOUT = 4V step
Slew Rate (Note 1)
SR
Rise Time (Note 1)
VOUT = 2V step
MAX4444
MAX4445
3800
MAX4444
2400
MAX4445
2000
VOUT = 1V step
1200
VOUT = 0.5V step
600
tRISE
Fall Time (Note 1)
tFALL
Settling Time
650
VOUT = 4V step
825
VOUT = 2V step
700
VOUT = 1V step
700
VOUT = 0.5V step
700
Settle to 0.1% , VOUT = 2V step
SFDR
VOUT = 2Vp-p
2nd-Harmonic Distortion
VOUT = 2Vp-p
3rd-Harmonic Distortion
5000
VOUT = 2Vp-p
12
fC = 100kHz
-65
fC = 5MHz
-60
fC = 20MHz
-55
fC = 100MHz
-35
fC = 100kHz
-65
fC = 5MHz
-62
fC = 20MHz
-50
fC = 100MHz
-35
fC = 100kHz
-90
fC = 5MHz
-72
fC = 20MHz
-62
fC = 100MHz
V/µs
V/µs
ps
ps
ns
dBc
dBc
dBc
-55
Differential Phase Error
DP
NTSC, RL = 150Ω
0.05
Differential Gain Error
DG
NTSC, RL = 150Ω
0.07
%
Input Noise Voltage Density
eN
f = 100kHz (Note 2)
25
nV/√Hz
iN
f = 100kHz
1.8
pA/√Hz
ZOUT
f = 10MHz
0.7
Ω
Input Noise Current Density
Output Impedance
degrees
Enable Time
tSHDN(ON)
VIN = 1V, VOUT settle to within 10%
80
ns
Disable Time
tSHDN(OFF)
VIN = 1V, VOUT settle to within 10%
200
ns
Power-Up Time
tON
VIN = 1V, VOUT settle to within 10%
0.5
µs
Power-Down Time
tOFF
VIN = 1V, VOUT settle to within 10%
0.3
µs
Note 1: Input step voltage has <100ps rise (fall) time. Measured at the output from 10% to 90% (90% to 10%) level.
Note 2: Includes the current noise contribution through the on-die feedback resistor.
_______________________________________________________________________________________
3
Typical Operating Characteristics
(VCC = +5V, VEE = -5V, VEN = 5V, VIN = VIN+ - VIN-, RL = 100Ω, REF = GND, AV = +2V/V, TA = +25°C, unless otherwise noted.)
3
3
0.9
2
0.7
0.5
-1
GAIN (dB)
0.6
0
GAIN (dB)
1
1
0
-1
-2
-2
-3
-3
-4
-5
1M
10M
100M
0
1M
10M
100M
100k
1G
10M
100M
1G
FREQUENCY (Hz)
FREQUENCY (Hz)
MAX4445
GAIN FLATNESS vs. FREQUENCY
MAX4444
LARGE-SIGNAL GAIN vs. FREQUENCY
MAX4445
LARGE-SIGNAL GAIN vs. FREQUENCY
2
0.2
1
GAIN (dB)
0.3
0.1
0
2
1
0
-1
0
-1
-2
-2
-3
-0.2
-3
-4
-0.3
-4
-5
-0.4
-5
10M
100M
-6
100k
1G
VOUT = 2Vp-p
3
-0.1
1M
MAX4445toc06
3
GAIN (dB)
0.4
VOUT = 2Vp-p
4
4
MAX4444toc05
5
MAX4445toc04
VOUT = 100mVp-p
1M
10M
100M
100k
1G
1M
10M
100M
FREQUENCY (Hz)
MAX4444
SMALL-SIGNAL PULSE RESPONSE
MAX4445
SMALL-SIGNAL PULSE RESPONSE
MAX4444
LARGE-SIGNAL PULSE RESPONSE
INPUT
25mV/div
INPUT
25mV/div
OUTPUT
50mV/div
OUTPUT
50mV/div
5ns/div
INPUT
250mV/div
OUTPUT
500mV/div
5ns/div
1G
MAX4444toc09
FREQUENCY (Hz)
MAX4445toc08
FREQUENCY (Hz)
MAX4444toc07
100k
1M
FREQUENCY (Hz)
0.6
0.5
-0.1
100k
1G
0.3
0.1
VOUT = 100mVp-p
-6
100k
0.4
0.2
-5
VOUT = 100mVp-p
VOUT = 100mVp-p
0.8
2
-4
4
MAX4444
GAIN FLATNESS vs. FREQUENCY
MAX4444toc02
4
GAIN (dB)
4
MAX4444toc01
5
MAX4445
SMALL-SIGNAL GAIN vs. FREQUENCY
MAX4444toc03
MAX4444
SMALL-SIGNAL GAIN vs. FREQUENCY
GAIN (dB)
MAX4444/MAX4445
Ultra-High-Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable
5ns/div
_______________________________________________________________________________________
Ultra-High-Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable
MAX4445
LARGE-SIGNAL PULSE RESPONSE
MAX4444
DIFFERENTIAL GAIN AND PHASE
SLEW RATE vs. OUTPUT VOLTAGE SWING
MAX4444
4000
0.01
0
-0.01
-0.02
-0.03
-0.04
-0.05
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
IRE
MAX4445
HARMONIC DISTORTION
vs. FREQUENCY
MAX4444
HARMONIC DISTORTION
vs. LOAD RESISTANCE
MAX4444toc13
-50
2nd HARMONIC
-60
-70
-40
2nd HARMONIC
-60
-30
-40
-50
10M
1M
-90
-100
100M
500k
10M
1M
100M
100
10k
FREQUENCY (Hz)
LOAD RESISTANCE (Ω)
MAX4445
HARMONIC DISTORTION
vs. LOAD RESISTANCE
MAX4444
HARMONIC DISTORTION
vs. OUTPUT VOLTAGE SWING
MAX4445
HARMONIC DISTORTION
vs. OUTPUT VOLTAGE SWING
-20
-40
-50
2nd HARMONIC
-30
-40
-50
2nd HARMONIC
-60
-70
-70
-80
-80
3rd HARMONIC
fC = 5MHz
-20
DISTORTION (dB)
-30
-60
0
-10
0
-10
-30
-40
-50
-80
-90
-90
-100
-100
10k
3rd HARMONIC
-70
3rd HARMONIC
-100
1k
2nd HARMONIC
-60
-90
LOAD RESISTANCE (Ω)
fC = 5MHz
-20
DISTORTION (dB)
fC = 5MHz, VOUT = 2Vp-p
100
1k
FREQUENCY (Hz)
0
-10
-90
-100
MAX4444toc16
500k
3rd HARMONIC
-80
3rd HARMONIC
MAX4444toc17
-90
-100
2nd HARMONIC
-60
-70
-80
3rd HARMONIC
fC = 5MHz, VOUT = 2Vp-p
-20
-70
-80
DISTORTION (dB)
-30
-50
0
-10
DISTORTION (dB)
-30
-40
VOUT = 2Vp-p
-20
DISTORTION (dB)
DISTORTION (dB)
-20
0
-10
MAX4445toc18
MAX4444
HARMONIC DISTORTION
vs. FREQUENCY
VOUT = 2Vp-p
100
0
OUTPUT VOLTAGE SWING (Vp-p)
MAX4445toc14
0
5ns/div
MAX4444toc15
2000
MAX4445
0
100
IRE
1000
-10
MAX4444toc12
0
3000
PHASE (degrees)
OUTPUT
500mV/div
0.08
0.06
0.04
0.02
0
-0.02
-0.04
-0.06
-0.08
GAIN (%)
5000
SLEW RATE (V/µs)
INPUT
250mV/div
MAX4444/45toc11
MAX4445toc10
6000
0.5
1.5
2.5
3.5
4.5
5.5
OUTPUT VOLTAGE SWING (Vp-p)
6.5
0.5
1.5
2.5
3.5
4.5
5.5
6.5
OUTPUT VOLTAGE SWING (Vp-p)
_______________________________________________________________________________________
5
MAX4444/MAX4445
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, VEN = 5V, VIN = VIN+ - VIN-, RL = 100Ω, REF = GND, AV = +2V/V, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, VEN = 5V, VIN = VIN+ - VIN-, RL = 100Ω, REF = GND, AV = +2V/V, TA = +25°C, unless otherwise noted.)
VOLTAGE SWING
vs. LOAD RESISTANCE
3.70
100
MAX4444/45toc22
100
CURRENT NOISE (pA/√Hz)
MAX4444
3.75
MAX4444/45toc21
MAX4445
3.80
INPUT CURRENT NOISE DENSITY
vs. FREQUENCY
1000
VOLTAGE NOISE (nV/√Hz)
OUTPUT VOLTAGE (V)
3.85
INPUT VOLTAGE NOISE DENSITY
vs. FREQUENCY
MAX4444/45toc20
3.90
10
3.65
10
3.60
400
800
1200
1600
1
1
2000
10
100
LOAD RESISTANCE (Ω)
1
-10
-20
-40
-30
-40
-50
-50
-60
-60
-70
-70
100
1k
10k
100k
1M
10M
MAX4444
CLOSED-LOOP OUTPUT IMPEDANCE
vs. FREQUENCY
1000
100
10
ZOUT (Ω)
CMR (dB)
-30
10
FREQUENCY (Hz)
MAX4444/45toc24
-20
10M
0
MAX4444/45toc23
0
1M
COMMON-MODE REJECTION
vs. FREQUENCY
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
-10
10k 100k
1k
FREQUENCY (Hz)
MAX4444toc25
0
PSRR (dB)
1
-0.1
-80
-0.01
-80
1M
10M
100M
1G
100k
1M
10M
100M
1G
100k
1M
10M
100M
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
SHUTDOWN RESPONSE
MAX4444
RECOMMENDED ISOLATION
RESISTANCE vs. CAPACITIVE LOAD
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
22
RISO (Ω)
20
18
16
OUTPUT
1V/div
0
1G
MAX4444/45toc28
24
INPUT OFFSET VOLTAGE (mV)
SHUTDOWN
PULSE
2.5V/div
MAX4444toc27
100k
MAX4444/45toc26
MAX4444/MAX4445
Ultra-High-Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable
-5
-10
-15
14
12
200ns/div
-20
8
10
12
14
16
18
20
CAPACITIVE LOAD (pF)
6
22
24
-40
-15
10
35
TEMPERATURE (°C)
_______________________________________________________________________________________
60
85
Ultra-High-Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable
6
4
43
42
41
40
39
38
EN = GND
4
3
2
1
37
2
5
QUIESCENT CURRENT (mA)
8
EN = 5V
44
MAX4444/45toc30
10
45
QUIESCENT CURRENT (mA)
MAX4444/45toc29
12
INPUT BIAS CURRENT (µA)
QUIESCENT CURRENT
vs. TEMPERATURE
QUIESCENT CURRENT
vs. TEMPERATURE
MAX4444/45toc31
INPUT BIAS CURRENT
vs. TEMPERATURE
36
0
0
35
-40
-25
-10
5
20
35
50
65
80
-40
-15
TEMPERATURE (°C)
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
Pin Description
PIN
NAME
FUNCTION
MAX4444
MAX4445
1, 2
1, 2
VCC
Positive Power-Supply Input. Bypass with a 0.1µF capacitor to GND.
3
3
IN-
Inverting Amplifier Input
4, 5
—
N.C.
No Connection. Not internally connected. Connect to GND for best AC performance.
—
4, 5
RG
Resistor Gain Input. Connect a resistor between these pins to set closed-loop
gain (Figure 1).
6
6
IN+
Noninverting Amplifier Input
7, 8, 11–14
7, 8, 11–14
VEE
Negative Supply Input. Bypass with a 0.1µF capacitor.
9
9
EN
Active-High Enable Input. Connect to VCC for normal operation. Connect to GND
for disable mode.
10
10
REF
Reference Input. Connect to midpoint of the two power supplies.
15
15
OUT
Amplifier Output
16
16
GND
Ground
_______________________________________________________________________________________
7
MAX4444/MAX4445
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, VEN = 5V, VIN = VIN+ - VIN-, RL = 100Ω, REF = GND, AV = +2V/V, TA = +25°C, unless otherwise noted.)
MAX4444/MAX4445
Ultra-High-Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable
IN+
RG
RISO
RGAIN
MAX4444
MAX4445
MAX4445
RG
GAIN = 1 + 600
RGAIN
Figure 1. Setting the Amplifier Gain
CLOAD
IN–
Figure 2. Using an Isolation Resistor for High Capacitive Loads
_______________Detailed Description
The MAX4444/MAX4445 differential-to-single-ended
line receivers offer high-speed and low-distortion performance, and are ideally suited for video and RF signal-processing applications. These receivers offer a
small-signal bandwidth of 550MHz and have a high
slew rate of up to 5000V/µs. Their 120mA output capability allows them to be directly coupled to data acquisition systems.
__________Applications Information
Grounding Bypassing
Use the following high-frequency design techniques
when designing the PC board for the MAX4444/
MAX4445.
• Use a multilayer board with one layer dedicated as
the ground plane.
• Do not use wire wrap or breadboards due to high
inductance.
• Avoid IC sockets due to high parasitic capacitance
and inductance.
• Bypass supplies with a 0.1µF capacitor. Use surface-mount capacitors to minimize lead inductance.
• Keep signal lines as short and straight as possible.
Do not make 90° turns. Use rounded corners. Do not
cross signal paths if possible.
• Ensure that the ground plane is free from voids.
Setting Gain (MAX4445)
The MAX4445 is stable with a minimum gain configuration of +2V/V. RGAIN, connected between the RG pins,
sets the gain of this device as shown in Figure 1.
Calculate the expected gain as follows:
Gain = (1 + 600 / RGAIN)
Driving Capacitive Loads
The MAX4444/MAX4445 are designed to drive capacitive loads. However, excessive capacitive loads may
cause ringing or instability at the output as the phase
margin of the device reduces. Adding a small series
isolation resistor at the output helps reduce the ringing
but slightly increases gain error (Figure 2). For recommended values, see Typical Operating Characteristics.
Coaxial Line Driver
The MAX4444/MAX4445 are well suited to drive coaxial
cables. Their high output current capability can easily
drive the 75Ω characteristic impedance of common
coaxial cables. Adjust the gain of the MAX4445 to compensate for cable losses to maintain the required levels
at the input of the next stage.
Chip Information
TRANSISTOR COUNT: 254
SUBSTRATE CONNECTED TO VEE
Low-Power Enable Mode
The MAX4444/MAX4445 are disabled when EN goes
low. This reduces supply current to only 3.5mA. As the
output becomes higher impedance, the effective
impedance at the output for the MAX4444 is 1.8kΩ. The
effective output impedance for the MAX4445 is 1.8kΩ
plus RGAIN.
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 1999 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.