THS4121 Datasheet, PDF (1/31 Pages) National Semiconductor (TI) – HIGH-SPEED FULLY DIFFERENTIAL I/O AMPLIFIERS

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THS4120
THS4121
SLOS319D – FEBRUARY 2001 – REVISED OCTOBER 2004
HIGH-SPEED FULLY DIFFERENTIAL I/O AMPLIFIERS
FEATURES
• High Performance
– 100 MHz, –3 dB Bandwidth
– 50 V/µs Slew Rate
– 75 dB Total Harmonic Distortion at 1 MHz
(V_O = 2 V_PP)
– 5.4 nV/√Hz Input-Referred Noise (10 kHz)
• Differential Input/Differential Output
– Balanced Outputs Reject Common-Mode
Noise
– Differential Reduced Second Harmonic
Distortion
• Power Supply Range
– V_DD = 3.3 V
DESCRIPTION
The THS412x is one in a family of fully
differential-input,
differential-output
devices
fabricated using Texas Instruments' state-of-the-art
submicron CMOS process.
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.
KEY APPLICATIONS
• Simple Single-Ended To Differential
Conversion
• Differential ADC Driver/Differential
Antialiasing
• Differential Transmitter and Receiver
• Output Level Shifter
THS4120
D, DGN, OR DGK PACKAGE
(TOP VIEW)
V_IN−
1
V_OCM
2
V_DD
3
V_OUT+
4
8
V_IN+
7
PD
6
GND
5
V_OUT−
THS4121
D, DGN, OR DGK PACKAGE
(TOP VIEW)
V_IN−
1
V_OCM
2
V_DD
3
V_OUT+
4
8
V_IN+
7
NC
6
GND
5
V_OUT−
Table 1. HIGH-SPEED DIFFERENTIAL I/O FAMILY
DEVICE
THS4120 ⁽¹⁾
THS4121
NUMBER OF
CHANNELS
1
1
POWERDOWN
Yes
–
(1) For proper functiionality, an external 10-kΩ pullup resistor is
required between the PD pin and the positive supply.
RELATED DEVICES
DEVICE ⁽¹⁾
THS413x
THS414x
THS415x
DESCRIPTION
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
SINGLE SUPPLY
VOLTAGE RANGE
5 V to 30 V
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
SPLIT SUPPLY
VOLTAGE RANGE
±2.5 to ±15
±2.5 to ±15
±2.5 to ±15
V_IN
V_OCM ^{− +}
+−
AV_DD DV_DD
A_IN
A_{IN AVSS Vref}
DIGITAL
OUTPUT
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2001–2004, Texas Instruments Incorporated