THS4120
THS4121
www.ti.com
SLOS319D–FEBRUARY 2001–REVISED OCTOBER 2004
HIGH-SPEED FULLY DIFFERENTIAL I/O AMPLIFIERS
FEATURES
KEY APPLICATIONS
•
Simple Single-Ended To Differential
Conversion
•
High Performance
–
–
–
100 MHz, –3 dB Bandwidth
50 V/µs Slew Rate
•
Differential ADC Driver/Differential
Antialiasing
75 dB Total Harmonic Distortion at 1 MHz
•
•
Differential Transmitter and Receiver
Output Level Shifter
(VO = 2 VPP
)
–
5.4 nV/√Hz Input-Referred Noise (10 kHz)
•
•
Differential Input/Differential Output
THS4121
THS4120
D, DGN, OR DGK PACKAGE
–
Balanced Outputs Reject Common-Mode
Noise
D, DGN, OR DGK PACKAGE
(TOP VIEW)
(TOP VIEW)
–
Differential Reduced Second Harmonic
Distortion
V
IN−
V
IN+
V
IN−
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
V
IN+
V
OCM
NC
V
OCM
PD
GND
V
V
DD
OUT+
GND
V
DD
OUT+
Power Supply Range
VDD = 3.3 V
V
V
OUT−
V
OUT−
–
DESCRIPTION
Table 1. HIGH-SPEED DIFFERENTIAL I/O FAMILY
The THS412x is one in
a
family of fully
differential-input,
fabricated using Texas Instruments' state-of-the-art
submicron CMOS process.
differential-output devices
NUMBER OF
CHANNELS
DEVICE
POWERDOWN
THS4120(1)
THS4121
1
1
Yes
–
The THS412x consists of a true, fully differential
signal path from input to output. This results in
excellent common-mode noise rejection and
improved total harmonic distortion.
(1) For proper functiionality, an external 10-kΩ pullup resistor is
required between the PD pin and the positive supply.
RELATED DEVICES
SINGLE SUPPLY
VOLTAGE RANGE
SPLIT SUPPLY
VOLTAGE RANGE
DEVICE(1)
DESCRIPTION
THS413x
THS414x
THS415x
150 MHz, 51 V/µs, 1.3 nV/√Hz
160 MHz, 450 V/µs, 6.5 nV/√Hz
150 MHz, 650 V/µs, 7.6 nV/√Hz
5 V to 30 V
±2.5 to ±15
±2.5 to ±15
±2.5 to ±15
5 V to 30 V
5 V to 30 V
(1) See the TI Web site for additional high-speed amplifier devices.
TYPICAL A/D APPLICATION CIRCUIT
V
DD
3.3 V
AV
DV
V
V
IN
DD
DD
−
+
A
A
IN
V
OCM
IN
DIGITAL
OUTPUT
+
−
AV
SS
ref
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2001–2004, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.