LT1469-2_15 Datasheet, PDF (1/12 Pages) Linear Technology – Dual 200MHz, 30V/s 16-Bit Accurate

LT1469-2
Dual 200MHz, 30V/µs
16-Bit Accurate A_V ≥ 2 Op Amp
FEATURES
DESCRIPTION
n _{Stable in Gain AV ≥ 2 (AV = –1)}
n _{200MHz Gain Bandwidth Product}
n _{30V/μs Slew Rate}
n _{Settling Time: 800ns (150μV, 10V Step)}
n _{Specified at ±5V and ±15V Supplies}
n _{Maximum Input Offset Voltage: 125μV}
n _{Low Distortion: –96.5dB for 100kHz, 10VP-P}
n _{Maximum Input Offset Voltage Drift: 3μV/°C}
n _{Maximum Inverting Input Bias Current: 10nA}
n _{Minimum DC Gain: 300V/mV}
n _{Minimum Output Swing into 2k: ±12.8V}
n _{Input Noise Voltage: 5nV/√Hz}
n _{Input Noise Current: 0.6pA/√Hz}
n _{Total Input Noise Optimized for 1kΩ < RS < 20kΩ}
n _{Available in 8-Lead Plastic SO and}
12-Lead (4mm × 4mm) DFN Packages
APPLICATIONS
n _{Precision Instrumentation}
n _{High Accuracy Data Acquisition Systems}
n _{16-Bit DAC Current-to-Voltage Converter}
n _{ADC Buffer}
n _{Low Distortion Active Filters}
n _{Photodiode Amplifiers}
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.
TYPICAL APPLICATION
16-Bit DAC I-to-V Converter
DAC ¹⁶
INPUTS
6k
LTC^®1597
20pF
–
1/2
LT1469-2
+
2k
V_OUT
50pF
OFFSET: V_OS + I_B (6kΩ) < 1LSB
SETTLING TIME TO 150μV = 1.6μs
OPTIONAL NOISE FILTER
SETTLING LIMITED BY 6k AND 20pF TO COMPENSATE DAC OUTPUT CAPACITANCE
14692 TA01a
Large-Signal Transient, A_V = –1
V_S = ±15V
10V
A_V = –1
R_F = R_G = 2k
C_F = 22pF
2V/DIV
0V
200ns/DIV
14692 TA02
14692f
1