Datasheet

LTC6912
10
6912fa
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications that apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
S
= 5V, AGND = 2.5V, Gain = 1, R
L
= 10k to midsupply point, unless
otherwise noted.
C, I GRADES H GRADE
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Specifications for the LTC6912-2 ONLY
Offset Voltage Magnitude Gain = 1 ● 0.25 3.5 0.25 6.5 mV
Referred to INA or INB Pins Gain = 8
● 0.14 2 0.14 4 mV
(Note 8)
Input Offset Voltage Drift, 6 10 µV/°C
Internal Op Amp
DC Input Resistance at DC V
INA
or V
INB
= 0V
INA or INB Pins (Note 9) Gain = 0
● >10 >10 MΩ
State = 8, Software Shutdown
● >10 >10 MΩ
Gain = 1
● 10 10 kΩ
Gain = 2
● 55kΩ
Gain = 4
● 2.5 2.5 kΩ
Gain > 4
● 1.25 1.25 kΩ
DC Input Resistance Drift at Gain = 1 85 95 ppm/°C
INA or INB Pins (Note 9) Gain = 2 90 100 ppm/°C
Gain = 4 95 105 ppm/°C
Gain = 8 120 130 ppm/°C
Gain = 16 130 140 ppm/°C
Gain = 32 140 150 ppm/°C
Gain = 64 170 180 ppm/°C
DC Input Resistance Match Gain = 1 ● 10 10 Ω
R
INA
-R
INB
Gain = 2 ● 55Ω
Gain = 4
● 55Ω
Gain > 4
● 55Ω
DC Small Signal Output Resistance DC V
INA
or V
INB
= 0V
at OUT A or OUT B Pins Gain = 0 0.4 0.4 Ω
Gain = 1 0.7 0.7 Ω
Gain = 2 1.0 1.0 Ω
Gain = 4 1.9 1.9 Ω
Gain = 8 3.4 3.4 Ω
Gain = 16 6.4 6.4 Ω
Gain = 32 15 15 Ω
Gain = 64 30 30 Ω
State = 8, Software Shutdown
● >1 >1 MΩ
Gain Bandwidth Product Gain = 64 ● 17 30 50 15 30 50 MHz
Wideband Noise f = 1kHz to 200kHz
(Referred to Input) Gain = 0 (Output Noise Only) 8.1 8.1 µV
RMS
Gain = 1 13.8 13.8 µV
RMS
Gain = 2 9.6 9.6 µV
RMS
Gain = 4 7.5 7.5 µV
RMS
Gain = 8 6.4 6.4 µV
RMS
Gain = 16 6.0 6.0 µV
RMS
Gain = 32 5.8 5.8 µV
RMS
Gain = 64 5.6 5.6 µV
RMS