LT6230_15 Datasheet, PDF (1/24 Pages) Linear Technology – 215MHz, Rail-to-Rail Output

LT6230/LT6230-10
LT6231/LT6232
215MHz, Rail-to-Rail Output,
1.1nV/√Hz, 3.5mA Op Amp Family
Features
Description
n _{Low Noise Voltage: 1.1nV/√Hz}
n _{Low Supply Current: 3.5mA/Amp Max}
n _{Low Offset Voltage: 350µV Max}
n _{Gain Bandwidth Product:}
LT6230: 215MHz; A_V ≥ 1
LT6230-10: 1450MHz; A_V ≥ 10
n _{Wide Supply Range: 3V to 12.6V}
n _{Output Swings Rail-to-Rail}
n _{Common Mode Rejection Ratio: 115dB Typ}
n _{Output Current: 30mA}
n _{Operating Temperature Range: –40°C to 85°C}
n _{LT6230 Shutdown to 10µA Maximum}
n _{LT6230/LT6230-10 in a Low Profile (1mm)}
ThinSOT™ Package
n _{Dual LT6231 in 8-Pin SO and Tiny DFN Packages}
n _{LT6232 in a 16-Pin SSOP Package}
Applications
n _{Ultrasound Amplifiers}
n _{Low Noise, Low Power Signal Processing}
n _{Active Filters}
n _{Driving A/D Converters}
n _{Rail-to-Rail Buffer Amplifiers}
The LT^®6230/LT6231/LT6232 are single/dual/quad low
noise, rail-to-rail output unity-gain stable op amps that
feature 1.1nV/√Hz noise voltage and draw only 3.5mA of
supply current per amplifier. These amplifiers combine
very low noise and supply current with a 215MHz gain-
bandwidth product, a 70V/µs slew rate and are optimized
for low supply voltage signal conditioning systems. The
LT6230-10 is a single amplifier optimized for higher gain
applications resulting in higher gain bandwidth and slew
rate. The LT6230 and LT6230-10 include an enable pin
that can be used to reduce the supply current to less
than 10µA.
The amplifier family has an output that swings within 50mV
of either supply rail to maximize the signal dynamic range
in low supply applications and is specified on 3.3V, 5V and
±5V supplies. The e_n • √I_SUPPLY product of 1.9 per amplifier
is among the most noise efficient of any op amp.
The LT6230/LT6230-10 are available in the 6-lead SOT‑23
package and the LT6231 dual is available in the 8-pin SO
package with standard pinouts. For compact layouts,
the dual is also available in a tiny dual fine pitch leadless
package (DFN). The LT6232 is available in the 16-pin
SSOP package.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Typical Application
Low Noise Low Power Instrumentation Amplifier
V_S+
IN⁺ +
1/2 LT6231
–
R2
196Ω
R1
10Ω
R3
–
196Ω
1/2 LT6231
R4
499Ω
R5
499Ω
R6
499Ω
V_S+
+
LT6202
–
V_OUT
V_S–
R7
499Ω
623012 TA01a
IN^– +
V_S–
A_V = 40
BW = 5.1MHz
V_S = ±1.5V to ±5V
I_S = 10mA
EN = 5.8µV_RMS INPUT REFERRED,
MEASUREMENT BW = 8MHz
Noise Voltage and Unbalanced
Noise Current vs Frequency
6
V_S = ±2.5V ⁶
T_A = 25°C
5
V_CM = 0V ₅
4
4
3
3
NOISE CURRENT
2
2
1
NOISE VOLTAGE ¹
0
0
10
100
1k
10k
100k
FREQUENCY (Hz)
623012 TA01b
623012fc
1