MAX4145 MAXIM [Maxim Integrated Products], MAX4145 Datasheet

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MAX4145

Manufacturer Part Number
MAX4145
Description
High-Speed, Low-Distortion, Differential Line Receivers
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet

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________________General Description
The MAX4144/MAX4145/MAX4146 differential line
receivers offer unparalleled high-speed, low-distortion
performance. Using a three op-amp instrumentation
amplifier architecture, these ICs have fully symmetrical
differential inputs and a single-ended output. They
operate from ±5V power supplies and are capable of
driving a 150Ω load to ±3.7V. The MAX4144 has an
internally set closed-loop gain of +2V/V. The MAX4145
is optimized for gains from +1V/V to +10V/V, while the
MAX4146 is optimized for gains from +10V/V to
+100V/V. The MAX4145/MAX4146 require a single
external resistor to set the closed-loop gain.
These amplifiers use laser-trimmed, matched thin-film
resistors to deliver a common-mode rejection (CMR) of
up to 90dB at 10MHz. Using current-feedback tech-
niques, the MAX4144 achieves a 130MHz bandwidth
and a 1000V/µs slew rate. The MAX4145 achieves a
bandwidth of 180MHz and a slew rate of 600V/µs while
operating with a closed-loop gain of +1V/V, and the
MAX4146 features a bandwidth of 70MHz and a slew
rate of 800V/µs with a gain of +10V/V. Excellent differ-
ential gain/phase and noise specifications make these
amplifiers ideal for a wide variety of video and RF
signal-processing applications.
For a complete differential transmission link, use the
MAX4144/MAX4145/MAX4146 with the MAX4147 differ-
ential line driver (see the MAX4147 data sheet for more
information).
________________________Applications
19-1147; Rev 3; 3/09
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Pin Configurations appear at end of data sheet.
Typical Application Circuit appears at end of data sheet.
Differential to Single-Ended Conversion
Twisted-Pair to Coaxial Converter
High-Speed Instrumentation Amplifier
Data Acquisition
Medical Instrumentation
High-Speed Differential Line Receiver
________________________________________________________________ Maxim Integrated Products
High-Speed, Low-Distortion,
Differential Line Receivers
MAX4144:
MAX4145:
MAX4146:
_______________Ordering Information
____________________________Features
MAX4144ESD
MAX4144EEE
MAX4145ESD
MAX4145EEE
MAX4146ESD
MAX4146EEE
♦ ♦ +2V/V Internally Fixed Gain
♦ ♦ 130MHz Bandwidth
♦ ♦ 1000V/μs Slew Rate
♦ ♦ 70dB CMR at 10MHz
♦ ♦ -90dBc SFDR (f = 10kHz)
♦ ♦ Low Differential Gain/Phase: 0.03%/0.03°
♦ ♦ 800μA Shutdown
♦ ♦ External Gain Selection from +1V/V to +10V/V
♦ ♦ 180MHz Bandwidth
♦ ♦ 90MHz 0.1dB Gain Flatness
♦ ♦ 600V/μs Slew Rate
♦ ♦ 75dB CMR at 10MHz
♦ ♦ -92dBc SFDR (f = 10kHz)
♦ ♦ Very Low Noise: 3.8nV/√Hz (G = +10V/V)
♦ ♦ 800μA Shutdown
♦ ♦ External Gain Selection from +10V/V to +100V/V
♦ ♦ 70MHz Bandwidth (A
♦ ♦ 800V/μs Slew Rate
♦ ♦ 90dB CMR at 10MHz
♦ ♦ -82dBc SFDR (f = 10kHz)
♦ ♦ Very Low Noise: 3.45nV/√Hz (G = +100V/V)
♦ ♦ 800μA Shutdown
PART
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
V
= +10V/V)
14 SO
16 QSOP
14 SO
16 QSOP
14 SO
16 QSOP
PIN-PACKAGE
1

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MAX4145 Summary of contents

Page 1

... Using current-feedback tech- niques, the MAX4144 achieves a 130MHz bandwidth and a 1000V/µs slew rate. The MAX4145 achieves a bandwidth of 180MHz and a slew rate of 600V/µs while operating with a closed-loop gain of +1V/V, and the MAX4146 features a bandwidth of 70MHz and a slew rate of 800V/µ ...

Page 2

... 2V/V 0. 1V/V 0 10V/V 1 10V/V 0 100V/V 1 MAX4144 20 MAX4145 5 + 15G MAX4146 0.8 2 MAX4144 1.4 MAX4145 1.4 MAX4146 2 ±3.6 ±3.1 ±3.7 ±3.4 ±3.8 UNITS V mV µV/°C µA µA pF MΩ V/V % ppm/° kΩ V ...

Page 3

... 100V 2V 1V 10V 1.8 + (20/G) 2.1 + (135/G) 1.7 MAX4144 70 MAX4145 75 MAX4146 90 MAX4144 1000 MAX4145 600 MAX4146 800 MAX4144 23 MAX4145 20 MAX4146 17 MAX4144 36 MAX4145 38 MAX4146 MAX4144 0.03 MAX4145 0.01 MAX4146 0.12 UNITS µA UNITS MHz MHz MHz nV/√Hz pA/√Hz dB V/µ µs % ...

Page 4

... 2V/V - 1V/V - 10V/V -48 V MAX4146 SMALL-SIGNAL GAIN vs. FREQUENCY ( 100mV OUT RMS 0.1 1 FREQUENCY (Hz) MAX4145 0.1dB GAIN FLATNESS vs. FREQUENCY ( 100mV 0.4 OUT RMS 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 100k 1M 10M 1G FREQUENCY (Hz) UNITS Degrees dBc = +10) 100 1000 = +1) 100M 1G ...

Page 5

... OUT 100k 1M 10M 100M FREQUENCY (Hz) MAX4146 SMALL-SIGNAL PULSE RESPONSE (A = +10 GND OUT GND TIME (10ns/div) MAX4145 LARGE-SIGNAL GAIN vs. FREQUENCY ( 2Vp-p 3 OUT 100k 1M 10M 1G FREQUENCY (Hz) MAX4144 SMALL-SIGNAL PULSE RESPONSE (A IN ...

Page 6

... A = 1V/V V -0.20 0 100 IRE 0.08 0.06 0.04 0. 1V/V V -0.02 0 100 IRE 6 _______________________________________________________________________________________ = 150Ω +25°C, unless otherwise noted.) A MAX4145 LARGE-SIGNAL PULSE RESPONSE (A = +1) V MAX4144/46 TOC16 GND IN GND OUT TIME (10ns/div) CLOSED-LOOP OUTPUT IMPEDANCE vs. FREQUENCY (A = +1) V 100 GND 10 1 GND 0.1 0.01 100k 1M 10M 100M FREQUENCY (Hz) ...

Page 7

... LOAD (Ω) MAX4146 HARMONIC DISTORTION vs. FREQUENCY ( 2Vp-p -10 OUT -20 -30 2ND HARMONIC -40 -50 -60 3RD HARMONIC -70 -80 -90 -100 100M 100k 1M FREQUENCY (Hz) MAX4145 5MHz HARMONIC DISTORTION vs. LOAD ( 2Vp-p OUT -10 -20 -30 -40 -50 -60 2ND HARMONIC -70 -80 3RD HARMONIC -90 -100 0 200 400 600 ...

Page 8

... HARMONIC DISTORTION vs. OUTPUT SWING (A 0 -10 -20 -30 2ND HARMONIC -40 -50 -60 3RD HARMONIC -70 -80 -90 -100 0.5 1.0 1.5 2.0 2.5 3.0 3.5 OUTPUT SWING (Vp-p) MAX4146 VOLTAGE NOISE DENSITY vs. FREQUENCY (A 100 100 1k 10k 1M FREQUENCY (Hz) MAX4145 CURRENT NOISE DENSITY vs. FREQUENCY (A 100 100 1k 10k FREQUENCY (Hz) = +100) V 3.0 3.5 = +10) V 100k 1M = +1) V 100k 1M ...

Page 9

... FREQUENCY (Hz 100M = +10) V SHDN 100M POWER-SUPPLY REJECTION vs. FREQUENCY 125 115 105 100k 1M 10M 1M FREQUENCY (Hz) MAX4145 COMMON-MODE REJECTION vs. FREQUENCY ( 110 100 100mV CM RMS 10 100k 1M 10M 100M FREQUENCY (Hz) SHUTDOWN RESPONSE TIME MAX4144/6 TOC-45 ...

Page 10

... The MAX4144 has a preset gain of +2V/V and achieves a 130MHz -3dB bandwidth, a 1000V/µs slew rate, and common-mode rejection (CMR) of 70dB at 10MHz. The MAX4145 and MAX4146 use a single external resistor to set the closed-loop gain from +1V/V to +10V/V for the MAX4145, or greater than +10V/V for the MAX4146. The MAX4145 achieves a -3dB bandwidth of 180MHz, a slew rate of 600V/µ ...

Page 11

... SHDN high. The amplifier output is high impedance in this mode; thus the impedance at OUT is that of the feedback resistors (1.4kΩ). The MAX4145/MAX4146 ’s gain is determined by a sin- gle external resistor, R +1V/V to +10V/V for the MAX4145 and +10V/V (R open) to +100V/V for the MAX4146. The gain (in V/V) is ...

Page 12

... REF where ΔR and ΔR are the SENSE and REF SENSE REF trace impedances, respectively 700Ω for the MAX4144 and MAX4145, and 100Ω for the MAX4146. 12 ______________________________________________________________________________________ MAX4144 MAX4145 MAX4146 Figure 3. Connection of SENSE and REF to a Remote Load Additionally, mismatches in the SENSE and REF traces lead to common-mode gain errors ...

Page 13

... Also note that the isolation resistor forms a divider that decreases the voltage delivered to the load. The MAX4144/MAX4145/MAX4146 are well suited as receivers in twisted-pair xDSL or NTSC/PAL video applications. The standard 24AWG telephone wire widely used in these applications is a lossy medium for high-frequency signals ...

Page 14

... Losses are higher at higher frequencies, contributing to severe pulse-edge rounding in digital applications. The nominal impedance of twisted-pair telephone wire is 110Ω. The MAX4145/MAX4146, with variable gain up to +10V/V and +100V/V, respectively, can be used to compensate for cable losses. In the graph shown in Figure 8, the cable characteristics are such that the ...

Page 15

... MAX4146 R R SENSE SENSE IN N.C. RG OUT RG REF IN REF MAX4145 MAX4146 R R SENSE IN SENSE RG N. OUT RG N.C. R REF IN+ 11 REF ...

Page 16

High-Speed, Low-Distortion, Differential Line Receivers REVISION REVISION NUMBER DATE 3 3/09 Updated Typical Operating Characteristics 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 ...

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