LTC6360_15 Datasheet, PDF (1/24 Pages) Linear Technology – Very Low Noise Single-Ended SAR ADC Driver with True Zero Output

LTC6360
Features
Very Low Noise Single-Ended
SAR ADC Driver
with True Zero Output
Description
n _{Output Swings to True Zero on Single Supply}
n _{2.3nV/√Hz Noise Density}
n _{Fast Settling Time: 150ns, 16-Bit, 4V Step}
n _{110dB SNR in 3MHz Bandwidth}
n _{Low Distortion, HD2 = –103dBc and HD3 = –109dBc}
for 4V_P-P Output at 40kHz
n _{Low Offset Voltage: 250µV Max}
n _{Low Power Shutdown: 350µA Max}
n _{3mm × 3mm 8-Pin DFN and 8-lead MSOP Packages}
Applications
n _{16-Bit and 18-Bit SAR ADC Driver}
n _{High Speed Buffer Amplifiers}
n _{Low Noise Signal Processing}
The LTC^®6360 is a very low noise, high precision, high
speed amplifier suitable for driving SAR ADCs. The
LTC6360 features a total output noise of 2.3nV/√Hz
combined with 150ns settling time to 16-bit levels (A_V = 1).
While powered from a single 5V supply, the amplifier out-
put can swing to 0V while maintaining high linearity. This
is made possible with the inclusion of a very low noise
on-chip charge pump that generates a negative voltage
to bias the output stage of the amplifier, increasing the
allowable negative voltage swing.
The LTC6360 is available in a compact 3mm × 3mm,
8-pin leadless DFN package and an 8-pin MSOP package
with exposed pad and operates over a –40°C to 125°C
temperature range.
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.
Typical Application
ADC Driver
0.1µF
1µF
5V
V_IN
0V TO 4V
+–
+IN
SHDN CPI CPO
+
LTC6360 _CHARGE
–
PUMP
GND
–IN
OUT
V_CC
V_DD
5V
5V
10Ω
330pF
0.1µF
RADC
10µF
ADC
6360 TA01a
Harmonic Distortion vs
Output Amplitude
–60
f_IN = 20kHz
–70 ^VOUT ^{= 0V TO V}P-P
–80
–90
–100
–110
HD2
–120
–130
HD3
–140
0
1
2
3
4
5
V_OUT (V_P-P)
6360 TA01b
6360f
1