LT1468
1
1468fb
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
90MHz, 22V/µs
16-Bit Accurate
Operational Amplifi er
The LT
®
1468 is a precision high speed operational amplifi er
with 16-bit accuracy and 900ns settling to 150µV for 10V
signals. This unique blend of precision and AC performance
makes the LT1468 the optimum choice for high accuracy
applications such as DAC current-to-voltage conversion
and ADC buffers. The initial accuracy and drift character-
istics of the input offset voltage and inverting input bias
current are tailored for inverting applications.
The 90MHz gain bandwidth ensures high open-loop gain
at frequency for reducing distortion. In noninverting ap-
plications such as an ADC buffer, the low distortion and
DC accuracy allow full 16-bit AC and DC performance.
The 22V/µs slew rate of the LT1468 improves large-signal
performance in applications such as active fi lters and
instrumentation amplifi ers compared to other precision
op amps.
The LT1468 is manufactured on a complementary bipolar
process. It is available in a space saving 3mm × 3mm lead-
less package, as well as small outline and DIP packages.
16-Bit DAC I-to-V Converter
n
90MHz Gain Bandwidth, f = 100kHz
n
22V/μs Slew Rate
n
Settling Time: 900ns (A
V
= –1, 150μV, 10V Step)
n
Low Distortion, –96.5dB for 100kHz, 10V
P-P
n
Maximum Input Offset Voltage: 75µV
n
Maximum Input Offset Voltage Drift: 2µV/°C
n
Maximum (–) Input Bias Current: 10nA
n
Minimum DC Gain: 1000V/mV
n
Minimum Output Swing into 2k: ±12.8V
n
Unity Gain Stable
n
Input Noise Voltage: 5nV/√Hz
n
Input Noise Current: 0.6pA/√Hz
n
Total Input Noise Optimized for 1k < R
S
< 20k
n
Specifi ed at ±5V and ±15V
n
16-Bit DAC Current-to-Voltage Converter
n
Precision Instrumentation
n
ADC Buffer
n
Low Distortion Active Filters
n
High Accuracy Data Acquisition Systems
n
Photodiode Amplifi ers
Total Harmonic Distortion vs Frequency
20pF
6k
LTC
®
1597
LT1468
16
DAC
INPUTS
+
–
OFFSET: V
OS
+ I
B
(6kΩ) < 1LSB
SETTLING TIME TO 150µV = 1.7µs
SETTLING LIMITED BY 6k AND 20pF TO COMPENSATE DAC OUTPUT CAPACITANCE
V
OUT
2k
50pF
OPTIONAL NOISE FILTER
1468 TA01
FREQUENCY (Hz)
100
–110
TOTAL HARMONIC DISTORTION (dB)
–100
–90
1k 10k 100k
1468 TA02
–120
–130
–80
V
S
= ±15V
A
V
= 2
R
L
= 2k
V
OUT
= 10V
P-P
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.
