LTC2255/LTC2254
2
22554fa
ABSOLUTE
AXI U
RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UU
W
OVDD = VDD (Notes 1, 2)
Supply Voltage (VDD) ................................................. 4V
Digital Output Ground Voltage (OGND) ....... –0.3V to 1V
Analog Input Voltage (Note 3) ..... –0.3V to (VDD + 0.3V)
Digital Input Voltage .................... –0.3V to (VDD + 0.3V)
Digital Output Voltage ................ –0.3V to (OVDD + 0.3V)
Power Dissipation ............................................ 1500mW
Operating Temperature Range
LTC2255C, LTC2254C ............................. 0
°C to 70°C
LTC2255I, LTC2254I ...........................–40
°C to 85°C
Storage Temperature Range ..................–65
°C to 125°C
ORDER PART
NUMBER
QFN PART*
MARKING
TJMAX = 125°C, θJA = 34°C/W
EXPOSED PAD (PIN 33) IS GND
MUST BE SOLDERED TO PCB
2255
2254
LTC2255CUH
LTC2255IUH
LTC2254CUH
LTC2254IUH
Consult LTC Marketing for parts specified with wider operating temperature ranges.
*The temperature grade is identified by a label on the shipping container.
32 31 30 29 28 27 26 25
9
10 11 12
TOP VIEW
UH PACKAGE
32-LEAD (5mm
× 5mm) PLASTIC QFN
13 14 15 16
17
18
19
20
21
22
23
24
8
7
6
5
4
3
2
1
AIN+
AIN–
REFH
REFL
VDD
GND
D10
D9
D8
OVDD
OGND
D7
D6
D5
V
DD
V
CM
SENSE
MODE
OF
D13
D12
D11
CLK
SHDN
OE
D0
D1
D2
D3
D4
33
The
● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 4)
LTC2255
LTC2254
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
Resolution (No Missing Codes)
●
14
Bits
Integral Linearity Error
Differential Analog Input (Note 5)
●
–5
±1
5
–5.5
±1
5.5
LSB
Differential Linearity Error
Differential Analog Input
●
–1
±0.5
1
–1
±0.5
1
LSB
Offset Error
(Note 6)
●
–12
±212
–12
±212
mV
Gain Error
External Reference
●
–2.5
±0.5
2.5
–2.5
±0.5
2.5
%FS
Offset Drift
±10
V/°C
Full-Scale Drift
Internal Reference
±30
ppm/
°C
External Reference
±5
ppm/
°C
Transition Noise
SENSE = 1V
1.3
LSBRMS
CO VERTER CHARACTERISTICS
U
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF
Lead Free Tape and Reel: Add #TRPBF