LTC6912
11
6912fa
ELECTRICAL CHARACTERISTICS The ● denotes the specifications that apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VS = 5V, AGND = 2.5V, Gain = 1, RL = 10k to midsupply point, unless
otherwise noted.
U
SERIAL I TERFACE SPECIFICATIO S
C, I GRADES
H GRADE
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Specifications for the LTC6912-2 ONLY
Voltage Noise Density
f = 50kHz
(Referred to Input)
Gain = 1
31.1
nV/
√Hz
Gain = 2
22.8
nV/
√Hz
Gain = 4
17
nV/
√Hz
Gain = 8
14.6
nV/
√Hz
Gain = 16
13.2
nV/
√Hz
Gain = 32
12.9
nV/
√Hz
Gain = 64
12.6
nV/
√Hz
Total Harmonic Distortion
Gain = 8, fIN = 10kHz, VOUT = 1VRMS
–84
dB
0.006
%
Gain = 8, fIN = 100kHz, VOUT = 1VRMS
–82
dB
0.008
%
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Digital I/O Logic Levels, All Digital I/O Voltage Referenced to DGND
VIH
Digital Input High Voltage
●
2V
VIL
Digital Input Low Voltage
●
0.8
V
VOH
Digital Output High Voltage
Sourcing 500
A
● V+ – 0.3
V
VOL
Digital Output Low Voltage
Sinking 500
A
●
0.3
V
Serial Interface Timing, V+ = 2.7V ~ 4.5V, V– = 0V (Note 10)
t1
DIN Valid to CLK Setup
●
60
ns
t2
DIN Valid to CLK Hold
●
0ns
t3
CLK Low
●
100
ns
t4
CLK High
●
100
ns
t5
CS/LD Pulse Width
●
60
ns
t6
LSB CLK to CS/LD
●
60
ns
t7
CS/LD Low to CLK
●
30
ns
t8
DOUT Output Delay
CL = 15pF
●
125
ns
t9
CLK Low to CS/LD Low
●
0ns
Serial Interface Timing, V+ = 4.5V ~ 5.5V, V– = 0V (Note 10)
t1
DIN Valid to CLK Setup
●
30
ns
t2
DIN Valid to CLK Hold
●
0ns
t3
CLK Low
●
50
ns
t4
CLK High
●
50
ns
t5
CS/LD Pulse Width
●
40
ns
t6
LSB CLK to CS/LD
●
40
ns
t7
CS/LD Low to CLK
●
20
ns
t8
DOUT Output Delay
CL = 15pF
●
85
ns
t9
CLK Low to CS/LD Low
●
0ns