Datasheet
LTC1852/LTC1853
23
18523fa
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However,
no responsibility is assumed for its use. Linear Technology Corporation makes no representation that
the interconnection of its circuits as described herein will not infringe on existing patent rights.
LTC1853 Hardwired for 4-Channel Differential Scan with Bipolar ±1.024V Operation
BUSY
DIFF
OUT
/S6
A2
OUT
/S5
A1
OUT
/S4
A0
OUT
/S3
D11/S2
D10/S1
D9/S0
D8
D7
D6
D5
D4
D3
D2
D1
D0
33
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
M1
M0
SHDN
CS
CONVST
RD
WR
DIFF
A2
A1
A0
UNI/BIP
PGA
48
36
47
46
45
44
43
42
41
40
39
38
37
OGND 34
18523 TA02
OV
DD
35
GND GND
1.6384X
REFCOMP
13 16
REFIN
REFOUT
12
11
10
2.5V
4.096V
COM
CH7
CH6
CH5
CH4
CH3
CH2
CH1
CH0
14
V
DD
9
8
7
6
5
4
3
2
1
INPUT
CONFIGURATION:
4 DIFFERENTIAL
CHANNELS: ±1.024V
15
0.1μF
V
DD
5V
10μF
1μF
0.1μF
10μF
0.1μF
10μF
3V TO 5V
5V
5V
5V
5V
CONVERT
CLOCK
OUTPUT
DRIVERS
DATA
LATCHES
REF AMP
8-CHANNEL
MULTIPLEXER
2.5V
REFERENCE
INTERNAL
CLOCK
LTC1853
CONTROL LOGIC
AND
PROGRAMMABLE
SEQUENCER
12-BIT
SAMPLING
ADC
+
–
+
–
+
–
+
–
+
–
FW48 TSSOP REV A 1005
0.09 – 0.20
(.0035 – .008)
0° – 8°
0.25
REF
0.45 – 0.75
(.018 – .029)
0.17 – 0.27
(.0067 – .0106)
TYP
0.50
(.0197)
BSC
6.0 – 6.2**
(.236 – .244)
7.9 – 8.3
(.311 – .327)
134
5
6
7
8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
12.40 – 12.60*
(.488 – .496)
1.10
(.0433)
MAX
0.05 – 0.15
(.002 – .006)
2
48 46 45
44
43
42
41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 2547
C0.10
-T-
-C-
MILLIMETERS
(INCHES)
DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED .152mm (.006") PER SIDE
DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED .254mm (.010") PER SIDE
NOTE:
1. CONTROLLING DIMENSION: MILLIMETERS
2. DIMENSIONS ARE IN
3. DRAWING NOT TO SCALE
*
**
0.32 ±0.05 0.50 BSC
6.2 ±0.10
8.4 ±0.10
48 25
124
RECOMMENDED SOLDER PAD LAYOUT
0.95 ±0.10
TYPICAL APPLICATIONS
PACKAGE DESCRIPTION
FW Package
48-Lead Plastic TSSOP (6.1mm)
(Reference LTC DWG # 05-08-1651 Rev A)