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