LTC1992_15 Datasheet, PDF (1/42 Pages) Linear Technology – Low Power, Fully Differential Input/Output Amplifier/Driver Family

LTC1992 Family
Low Power, Fully Differential
Input/Output
Amplifier/Driver Family
FEATURES
n _{Available with Adjustable Gain or Fixed Gain of 1,}
2, 5 or 10
n _{±0.3% (Max) Gain Error from –40°C to 85°C}
n _{3.5ppm/°C Gain Temperature Coefficient}
n _{5ppm Gain Long Term Stability}
n _{Fully Differential Input and Output}
n _{CLOAD Stable up to 10,000pF}
n _{Adjustable Output Common Mode Voltage}
n _{Rail-to-Rail Output Swing}
n _{Low Supply Current: 1mA (Max)}
n _{High Output Current: 10mA (Min)}
n _{Specified on a Single 2.7V to ±5V Supply}
n _{DC Offset Voltage <2.5mV (Max)}
n _{Available in 8-Lead MSOP Package}
APPLICATIONS
n _{Differential Driver/Receiver}
n _{Differential Amplification}
n _{Single-Ended to Differential Conversion}
n _{Level Shifting}
n _{Trimmed Phase Response for Multichannel Systems}
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
DESCRIPTION
The LTC^®1992 product family consists of five fully differen-
tial, low power amplifiers. The LTC1992 is an unconstrained
fully differential amplifier. The LTC1992-1, LTC1992-2,
LTC1992-5 and LTC1992-10 are fixed gain blocks (with
gains of 1, 2, 5 and 10 respectively) featuring precision
on-chip resistors for accurate and ultrastable gain. All of
the LTC1992 parts have a separate internal common mode
feedback path for outstanding output phase balancing
and reduced second order harmonics. The V_OCM pin sets
the output common mode level independent of the input
common mode level. This feature makes level shifting of
signals easy.
The amplifiers’ differential inputs operate with signals
ranging from rail-to-rail with a common mode level from
the negative supply up to 1.3V from the positive supply.
The differential input DC offset is typically 250μV. The
rail-to-rail outputs sink and source 10mA. The LTC1992
is stable for all capacitive loads up to 10,000pF.
The LTC1992 can be used in single supply applications
with supply voltages as low as 2.7V. It can also be used
with dual supplies up to ±5V. The LTC1992 is available in
an 8-pin MSOP package.
TYPICAL APPLICATION
Single-Supply, Single-Ended to Differential Conversion
10k
5V
10k
0V
V_IN
–5V
10k
INPUT SIGNAL
FROM A
±5V SYSTEM
0.01μF
5V
3
1_{– +}4
7 _VMID
2
LTC1992
V_OCM
8_{+ –5}
6
10k
1992 TA01a
5V
2.5V
0V
5V
2.5V
0V
OUTPUT SIGNAL
FROM A
SINGLE-SUPPLY SYSTEM
V_IN
(5V/DIV)
+OUT
(2V/DIV)
–OUT
5V
0V
–5V
5V
0V
1992 TA01b
1992fb
1