LT1469-2
Dual 200MHz, 30V/µs
16-Bit Accurate A
V
≥
2 Op Amp
FEATURES
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DESCRIPTION
The LT
®
1469-2 is a dual, precision high speed opera-
tional amplifier with 16-bit accuracy, decompensated to
be stable in a gain of 2 or greater. The combination of
precision and AC performance makes the LT1469-2 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 LT1469-2 improves large-signal
performance in applications such as active filters and
instrumentation amplifiers compared to other precision
op amps.
The LT1469-2 is specified on power supply voltages of
±5V and ±15V and from –40°C to 85°C. It is available in
an 8-lead SOIC package and a space saving 4mm
×
4mm
leadless package. For a unity-gain stable op amp with same
DC performance, see the LT1469 datasheet.
L,
LT, LTC and LTM 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 (150μV, 10V Step)
Specified at ±5V and ±15V Supplies
Maximum Input Offset Voltage: 125μV
Low Distortion: –96.5dB for 100kHz, 10V
P-P
Maximum Input Offset Voltage Drift: 3μV/°C
Maximum Inverting Input Bias Current: 10nA
Minimum DC Gain: 300V/mV
Minimum Output Swing into 2k: ±12.8V
Input Noise Voltage: 5nV/√Hz
Input Noise Current: 0.6pA/√Hz
Total Input Noise Optimized for 1kΩ < R
S
< 20kΩ
Available in 8-Lead Plastic SO and
12-Lead (4mm
×
4mm) DFN Packages
APPLICATIONS
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Precision Instrumentation
High Accuracy Data Acquisition Systems
16-Bit DAC Current-to-Voltage Converter
ADC Buffer
Low Distortion Active Filters
Photodiode Amplifiers
TYPICAL APPLICATION
16-Bit DAC I-to-V Converter
20pF
DAC
INPUTS
16
6k
10V
Large-Signal Transient, A
V
= –1
V
S
= ±15V
A
V
= –1
R
F
= R
G
= 2k
C
F
= 22pF
–
1/2
LT1469-2
2k
V
OUT
50pF
0V
2V/DIV
LTC
®
1597
+
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
14692 TA01a
200ns/DIV
14692 TA02
14692f
1
LINER [ LINEAR TECHNOLOGY ]
