LTC6362 Datasheet, PDF (1/22 Pages) Linear Technology – Precision, Low Power Rail-to-Rail Input/Output

LTC6362
FEATURES
Precision, Low Power
Rail-to-Rail Input/Output
Differential Op Amp/SAR
ADC Driver
DESCRIPTION
n _{1mA Supply Current}
n _{Single 2.8V to 5.25V supply}
n _{Fully Differential Input and Output}
n _{200μV Max Offset Voltage}
n _{260nA Max Input Bias Current}
n _{Fast Settling: 550ns to 18-Bit, 8VP-P Output}
n _{Low Distortion: –116dBc at 1kHz, 8VP-P}
n _{Rail-to-Rail Inputs and Outputs}
n _{3.9nV/√Hz Input-Referred Noise}
n _{180MHz Gain-Bandwidth Product}
n _{34MHz –3dB Bandwidth}
n _{Low Power Shutdown: 70µA}
n _{8-Lead MSOP and 3mm × 3mm 8-Lead DFN Packages}
APPLICATIONS
n _{16-Bit and 18-Bit SAR ADC Drivers}
n _{Single-Ended-to-Differential Conversion}
n _{Low Power Pipeline ADC Driver}
n _{Differential Line Drivers}
n _{Battery-Powered Instrumentation}
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.
The LTC^®6362 is a low power, low noise differential op
amp with rail-to-rail input and output swing that has been
optimized to drive low power SAR ADCs. The LTC6362
draws only 1mA of supply current in active operation, and
features a shutdown mode in which the current consump-
tion is reduced to 70μA.
The amplifier may be configured to convert a single-
ended input signal to a differential output signal, and is
capable of being operated in an inverting or noninverting
configuration.
Low offset voltage, low input bias current, and a stable
high impedance configuration make this amplifier suit-
able for use not only as an ADC driver but also earlier in
the signal chain, to convert a precision sensor signal to
a balanced (differential) signal for processing in noisy
industrial environments.
The LTC6362 is available in an 8-lead MSOP package and
also in a compact 3mm × 3mm 8-pin leadless DFN pack-
age, and operates with guaranteed specifications over a
–40°C to 125°C temperature range.
TYPICAL APPLICATION
DC-Coupled Interface from a Ground-Referenced
Single-Ended Input to an LTC2379-18 SAR ADC
1k
5V
3.9nF
5V 2.5V
1k
V_OCM ^{– +}
V_IN
0.1µF
SHDN
LTC6362
+–
35.7Ω
35.7Ω
3.9nF
A_IN+ ^VREF
V_DD
LTC2379-18
SAR ADC
A_IN–
18-BIT
1.6Msps
3.9nF
GND
1k
1k
6362 TA01a
LTC6362 Driving LTC2379-18
f_IN = 2kHz, –1dBFS, 16384-Point FFT
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
0
V_S = 5V, 0V
V_OUTDIFF = 8.9V_P-P
HD2 = –116.0dBc
HD3 = –114.9dBc
SFDR = 110.1dB
THD = –108.0dB
SNR = 101.2dB
SINAD = 99.9dB
100 200 300 400 500 600 700 800
FREQUENCY (kHz)
6362 TA01b
6362fa
1