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LT1468CDD-2PBF

产品描述16-Bit DAC Current-to-Voltage Converter
文件大小186KB,共12页
制造商Linear ( ADI )
官网地址http://www.analog.com/cn/index.html
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LT1468CDD-2PBF概述

16-Bit DAC Current-to-Voltage Converter

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LT1468-2
200MHz, 30V/µs
16-Bit Accurate
A
V
2 Op Amp
FEATURES
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DESCRIPTION
The LT
®
1468-2 is a precision high speed operational ampli-
fier with 16-bit accuracy, decompensated to be stable in a
gain of 2 or greater. The combination of precision and AC
performance makes the LT1468-2 the optimum choice for
high accuracy applications such as DAC current-to-voltage
conversion and ADC buffers. The initial accuracy and drift
characteristics of the input offset voltage and inverting input
bias current are tailored for inverting applications.
The 200MHz 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 high slew rate of the LT1468-2 improves large-signal
performance in applications such as active filters and
instrumentation amplifiers compared to other precision
op amps.
The LT1468-2 is specified on power supply voltages of
±5V and ±15V and from –40°C to 85°C. For a unity-gain
stable op amp with same DC performance, see the LT1468
datasheet.
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.
Stable in Gain A
V
≥ 2 (A
V
= –1)
200MHz Gain Bandwidth Product
30V/μs Slew Rate
Settling Time: 800ns (10V Step, 150μV)
Specified at ±5V and ±15V Supplies
Low Distortion, – 96.5dB for 100kHz, 10V
P-P
Maximum Input Offset Voltage: 75μV
Maximum Input Offset Voltage Drift: 2μV/°C
Maximum (–) Input Bias Current: 10nA
Minimum DC Gain: 1000V/mV
Minimum Output Swing into 2k: ±12.8V
Input Noise Voltage: 5nV/√Hz
Input Noise Current: 0.6pA/√Hz
Total Input Noise Optimized for 1k < R
S
< 20k
Available in an 8-Lead Plastic SO Package
and 8-Lead DFN Package
APPLICATIONS
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16-Bit DAC Current-to-Voltage Converter
Precision Instrumentation
ADC Buffer
Low Distortion Active Filters
High Accuracy Data Acquisition Systems
Photodiode Amplifiers
TYPICAL APPLICATION
16-Bit DAC I-to-V Converter
Large Signal Transient, A
V
= –1
10V
V
S
= ±15V
A
V
= –1
R
F
= R
G
= 2k
C
F
= 22pF
20pF
DAC
INPUTS
16
6k
LT1468-2
2k
V
OUT
50pF
2V/DIV
LTC
®
1597
+
0V
OPTIONAL NOISE FILTER
OFFSET: V
OS
+ I
B
(6kΩ) < 1LSB
SETTLING TIME TO 150μV = 1.6μs
SETTLING LIMITED BY 6k AND 20pF TO COMPENSATE DAC OUTPUT CAPACITANCE
14682 TA01
200ns/DIV
14682 TA02
14682fa
1

 
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