Datasheet

LTC2248/LTC2247/LTC2246
2
224876fa
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
OV
DD
= V
DD
(Notes 1, 2)
Supply Voltage (V
DD
) ................................................. 4V
Digital Output Ground Voltage (OGND) ....... –0.3V to 1V
Analog Input Voltage (Note 3) ..... –0.3V to (V
DD
+ 0.3V)
Digital Input Voltage .................... –0.3V to (V
DD
+ 0.3V)
Digital Output Voltage ................–0.3V to (OV
DD
+ 0.3V)
Power Dissipation............................................ 1500mW
Operating Temperature Range
LTC2248C, LTC2247C, LTC2246C........... 0°C to 70°C
LTC2248I, LTC2247I, LTC2246I ..........–40°C to 85°C
Storage Temperature Range ..................–65°C to 125°C
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 4)
LTC2248 LTC2247 LTC2246
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
Resolution ● 14 14 14 Bits
(No Missing Codes)
Integral Differential Analog Input ● –4 ±14–4±14–4±14 LSB
Linearity Error (Note 5)
Differential Differential Analog Input ● –1 ±0.5 1 –1 ±0.5 1 –1 ±0.5 1 LSB
Linearity Error
Offset Error (Note 6) ● –12 ±212–12±212–12±212 mV
Gain Error External Reference ● –2.5 ±0.5 2.5 –2.5 ±0.5 2.5 –2.5 ±0.5 2.5 %FS
Offset Drift ±10 ±10 ±10 µV/°C
Full-Scale Drift Internal Reference ±30 ±30 ±30 ppm/°C
External Reference ±5 ±5 ±5 ppm/°C
Transition Noise SENSE = 1V 1 1 1 LSB
RMS
CO VERTER CHARACTERISTICS
U
T
JMAX
= 125°C, θ
JA
= 34°C/W
EXPOSED PAD IS GND (PIN 33)
MUST BE SOLDERED TO PCB
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
1AIN
+
AIN
–
REFH
REFH
REFL
REFL
V
DD
GND
D10
D9
D8
OV
DD
OGND
D7
D6
D5
V
DD
V
CM
SENSE MODE OF D13 D12 D11
CLK
SHDN
OE D0 D1 D2 D3 D4
33
ORDER PART NUMBER
Consult LTC Marketing for parts specified with wider operating temperature ranges.
*The temperature grade is identified by a label on the shipping container.
LTC2248CUH
LTC2248IUH
LTC2247CUH
LTC2247IUH
LTC2246CUH
LTC2246IUH
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
QFN PART MARKING*
2248
2248
2247
2247
2246
2246