Datasheet
LTC2203/LTC2202
27
22032fd
9
20
20
8
7
6
5
4
3
2
1
A7
V
CC
U2
74VCX245BQX
U1*
EXPOSED PAD
OVP
OVP
A6
A5
A4
A3
A2
A1
A0
B7
2
4
3
1
5
3
2
1
B6
B5
B4
B3
B2
B1
B0
10
9
8
7
6
5
4
3
2
1
10
11
12
13
14
15
16
17
18
19
11
12
13
14
15
16
17
18
19
GND
J1
3201S-40G1
U6
24LC025
U5
NC7SV86P5X
U4
NC7SV86P5X
1
RN1A, 33
RN1B, 33
RN1C, 33
RN1D, 33
RN2A, 33
RN2B, 33
RN2C, 33
RN2D, 33
RN3A, 33
RN3B, 33
RN3C, 33
RN3D, 33
RN4A, 33
RN4B, 33
RN4C, 33
RN4D, 33
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
V
CC
U3
74VCX245BQX
OVP
8
1
2
7
6
5
1
5
3
4
2
3
4
V
CC
WP
SCL
SDA
A0
R17
10K
R18
10K
R19
10K
R5
33
A1
A2
A3
A7
A6
A5
A4
A3
A2
A1
A0
B7
B6
B5
B4
B3
B2
B1
B0
GND
OE
T/R
OE
T/R
OV
DD
D11
D10
D9
D8
OGND
CLKOUT +
CLKOUT –
D7
D6
D5
OV
DD
SENSE
C1
0.1μF
VCM
V
DD
V
DD
GND
AIN +
AIN –
GND
GND/ENC +
GND/ENC –
GND
V
DD
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
GND
PGA
RAND
MODE
OE
OF
D15
D14
D13
D12
OGND
OV
DD
13
14
15
16
17
18
19
20
21
22
23
24
49
48
47
46
45
44
43
42
41
40
39
38
37
V
DD
V
DD
GND
SHDN
DITH
D0
D1
D2
D3
D4
OGND
OV
DD
JP6
DITH
V
DD
V
DD
V
DD
3
2
1
GND
JP6
DITH
V
DD
3
3
J3
1
2
4
R20
10k
R21
10k
2
1
GND
C19
0.1μF
C14
0.1μF
GND
C18
0.1μF
C17
0.1μF
C8
2.2μF
C2
2.2μF
C16
0.1μF
C15
0.1μF
C28
0.1μF
C13
0.1μF
OGND
1
2
3
4
8
7
1
6
5
V
DD
OVP
OVP
E3
E1
E4
U7
LT1763
R25
OUT
ADJ
GND
V
DD
+ 3.3V
R29
1k
R30
OPEN
R28
33
ENCODE
INPUT
GND
BYP
IN
GND
GND
SHDN
C21
0.01μF
C22
1.0μF
C20
10μF
6.3V
C27
100μF
6.3V OPT
C23
4.7μF
R23
100K
R22
105K
+
V
DD
OSC1
OPT.
V
DD
V
DD
R33 *
EN
F
O
GND
C9
0.1μF
C3
8.2pF
C5
8.2pF
C7
8.2pF
J4
J2
R12
OPEN
R11
OPEN
R24
OPEN
R32
0
R27
10Ω
R8
51Ω
5.1Ω
R10
5.1Ω
R9
OPEN
R26
10Ω
1
2
3
5
T1
ANALOG
INPUT
DCIN+
ETC1-1T
4
C4
C6
C26
0.1μF
C25
0.1μF
22032 F014
OPEN
V
DD
JP2
SENSE
JP4
RAND
JP3
PGA
V
DD
V
DD
R31
O
V
DD
2
1
2
2
R6
OPEN
R7
1K
R1
10K
R2
10K
R3
1K
R4
OPEN
OVP
GND
33
GND GND
ASSEMBLY TYPE
* VERSION TABLE
U1 R33 INPUT FREQUENCY BITS MSPS
DC919A-A LTC2207CUK 0.01μF DC < A
IN
< 70MHz 16 105
DC919A-B LTC2206CUK 0.01μF DC < A
IN
< 70MHz 16 80
DC919A-C LTC2205CUK 0.01μF DC < A
IN
< 70MHz 16 65
DC919A-D LTC2204CUK 0.01μF DC < A
IN
< 70MHz 16 40
DC919A-E LTC2203CUK 0Ω DC < A
IN
< 70MHz 16 25
DC919A-F LTC2202CUK 0Ω DC < A
IN
< 70MHz 16 10
OPEN
OPEN
R13
OPEN
Evaluation Circuit Schematic of the LTC2203/LTC2202
APPLICATIONS INFORMATION