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LTC2615_15 Datasheet, PDF (5/18 Pages) Linear Technology – Octal 16-/14-/12-Bit Rail-to Rail DACs in 16-Lead SSOP
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LTC2605/LTC2615/LTC2625
TIMING CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. See Figure 1. (Notes 8, 9)
SYMBOL PARAMETER
VCC = 2.7V to 5.5V
fSCL
SCL Clock Frequency
tHD(STA) Hold Time (Repeated) Start Condition
tLOW
Low Period of the SCL Clock Pin
tHIGH
High Period of the SCL Clock Pin
tSU(STA) Set-Up Time for a Repeated Start Program
tHD(DAT) Data Hold Time
tSU(DAT) Data Set-Up Time
tr
Rise Time of Both SDA and SCL Signals
tf
Fall Time of Both SDA and SCL Signals
tSU(STO) Set-Up Time for Stop Condition
tBUF
Bus Free Time Between a Stop and Start Condition
CONDITIONS
(Note 7)
(Note 7)
MIN
TYP
l
0
l
0.6
l
1.3
l
0.6
l
0.6
l
0
l 100
l 20 + 0.1CB
l 20 + 0.1CB
l
0.6
l
1.3
MAX
UNITS
400
kHz
μs
μs
μs
μs
0.9
μs
ns
300
ns
300
ns
μs
μs
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Linearity and monotonicity are defined from code kL to code
2N – 1, where N is the resolution and kL is given by kL = 0.016(2N/VREF),
rounded to the nearest whole code. For VREF = 4.096V and N = 16,
kL = 256 and linearity is defined from code 256 to code 65,535.
Note 3: SDA, SCL at 0V or VCC, CA0, CA1 and CA2 floating.
Note 4: Inferred from measurement at code 256 (LTC2605/LTC2605-1),
code 64 (LTC2615/LTC2615-1) or code 16 (LTC2625/LTC2625-1) and at
full-scale.
Note 5: VCC = 5V, VREF = 4.096V. DAC is stepped 1/4-scale to 3/4-scale and
3/4-scale to 1/4-scale. Load is 2kΩ in parallel with 200pF to GND.
Note 6: VCC = 5V, VREF = 4.096V. DAC is stepped ±1LSB between half-scale
and half-scale – 1. Load is 2kΩ in parallel with 200pF to GND.
Note 7: CB = capacitance of one bus line in pF.
Note 8: All values refer to VIH(MIN) and VIL(MAX) levels.
Note 9: These specifications apply to LTC2605/LTC2605-1,
LTC2615/LTC2615-1 and LTC2625/LTC2625-1.
Note 10: DC Crosstalk is measured with VCC = 5V and VREF = 4096V, with
the measured DAC at mid-scale, unless otherwise noted.
Note 11: RL = 2kΩ to GND or VCC.
Note 12: Guaranteed by design and not production tested.
ELECTRICAL CHARACTERISTICS
Test Circuit 1
100Ω
CAn
VIH(CAn)/VIL(CAn)
2605 TC01
Test Circuit 2
VDD
RINH/RINL/RINF
2605 TC02
GND
2605fa
5
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