BHA
BHA Board Waveforms
1
1.6Vp-p (H)
2
0.8Vp-p (H)
3
0.8Vp-p (H)
4
2Vp-p (H)
5
1Vp-p (H)
6
1Vp-p (H)
BHA Board IC Block Diagrams
CXA1521M (IC170, 270, 370, 700)
IN 1
2
3
4
8
7
6
5
GCA
Vcc
DC CONT
REGULATOR
GND
OUT
GAIN-CONT
DC-CONT
GND
GAIN
CONT
V
EE
EL4451CS (IC451, 551, 651)
Σ
1
2
3
7
4
5
6
14
13
12
11
10
9
8
V
NC
V+
FB
REF
NC
GAIN
NC
GND
V-
V+
NC
GAIN
V-
MB88346BPFV (IC3)
1
2
3
4
5
6
7
8
COMMON
INH
VEE
CH1
A
CH0
VDD
VSS
LOGIC LEVEL
CONVERTOR
OUT IN
C
OUT IN
C
8 BIT
LATCH
8 BIT
R-2R
D/A CONVERTER
12 BIT SHIFT REGISTER
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9 D10 D11
ADDRESS
DECODER
1 2 3 4
12
D0
D7
8 BIT
LATCH
8 BIT
R-2R
D/A CONVERTER
D0
D7
1
2
3
4
5
6
7
8
9
10
1
20
19
18
17
16
15
14
13
12
11
A01
A12
8
12
GND
A02
A01
DI
CLK
LD
DO
A12
A11
VCC
VSS
A03
A04
A06
A07
A08
A09
A10
VDD
A05
TC4W53F (IC101, 102, 201, 202, 301, 302,
401, 501, 601, 450, 550, 650)
9-10