LTC6912C-1 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC6912C-1 Datasheet PDF : 24 Pages
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LTC6912
SERIAL I TERFACE SPECIFICATIO S
SYMBOL
PARAMETER
CONDITIONS
Serial Interface Timing, Dual ±4.5V ~ ±5.5V Supplies (Note 10)
t1
DIN Valid to CLK Setup
t2
DIN Valid to CLK Hold
t3
CLK High
t4
CLK Low
t5
CS/LD Pulse Width
t6
LSB CLK to CS/LD
t7
CS/LD Low to CLK
t8
DOUT Output Delay
CL = 15pF
t9
CLK Low to CS/LD Low
MIN TYP MAX UNITS
● 30
●0
● 50
● 50
● 40
● 40
● 20
●
●0
ns
ns
ns
ns
ns
ns
ns
85
ns
ns
t1
t2
t4
t3
t6
t7
CLK
DIN
D3
D2
CS/LD
DOUT
D4
t8
D3
D2
PREVIOUS BYTE
D31
D31
t9
D0
D7 • • • D4 D3
t5
D0
D7 • • • D4 D3
CURRENT BYTE 6912 TD
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: The LTC6912-1C and LTC6912-1I are guaranteed functional over
the operating temperature range of –40°C to 85°C. The LTC6912-1H is
guaranteed functional over the operating temperature range of –40°C to
125°C.
Note 3: The LTC6912-1C is guaranteed to meet specified performance
from 0°C to 70°C. The LTC6912-1C is designed, characterized and
expected to meet specified performance from – 40°C to 85°C but is not
tested or QA sampled at these temperatures. The LTC6912-1I is
guaranteed to meet specified performance from –40°C to 85°C. The
LTC6912-1H is guaranteed to meet specified performance from –40°C to
125°C.
Note 4: Output voltage swings are measured as differences between the
output and the respective supply rail.
Note 5: Extended operation with output shorted may cause junction
temperature to exceed the 150°C limit for GN package and 125°C for a
DFN package is not recommended.
Note 6: Gain is measured with a large signal DC test using an output
excursion between approximately 30% and 70% of supply voltage.
Note 7: Channel-to-channel isolation is measured by applying a 200kHz
input signal to one channel so that its output varies 1VRMS, and measuring
the output voltage RMS of the other channel relative to AGND with its
input tied to AGND. Isolation is calculated:
IsolationB = 20 • log10(VOUTA/VOUTB) or
IsolationA = 20 • log10(VOUTB/VOUTA)
High channel-to-channel isolation is strongly dependent on proper circuit
layout. See Applications Information.
Note 8: Offset voltage referred to the INA or INB input is (1 + 1/|GAIN|)
times the offset voltage of the internal op amp, where GAIN is the nominal
gain magnitude. The typical offset voltage values are for 25°C only. See
Applications Information.
Note 9: Input resistance can vary by approximately ±30% part-to-part at a
given gain setting.
Note 10: Guaranteed by design, not subject to test.
Note 11: States 13, 14 and 15 (binary 11xx) are not used. Programming a
channel to states 8 or higher will configure that particular channel into a
low power shutdown state. In addition, programming a channel into
state 15 (binary 1111) will cause that particular channel to draw up to
20mA of supply current and is not recommended.
6912fa
12
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