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MAX154BEWG+T

P1-P3P4-P6P7-P9P10-P12
MAX154/MAX158
Bipolar Input Operation
The circuit in Figure 10a can be used for bipolar input
operation. The input voltage is scaled by an amplifier
so that only positive voltages appear at the ADC’s
inputs. The analog input range is ±4V and the output
code is complementary offset binary. The ideal
input/output characteristic is shown in Figure 10b.
CMOS High-Speed 8-Bit ADCs with
Multiplexer and Reference
10 ______________________________________________________________________________________
1pFC
S
12pF
C
S
2pF
1pF
•
•
•
15 LSB COMPARATORS
TO LS
LADDER
R
ON
1pF
1pF
•
•
•
16 MSB COMPARATORS
TO MS
LADDER
R
ON
R
MUX
R
S
V
IN
AIN1
11111111
11111110
10000010
10000001
01111111
01111110
10000000
00000001
00000000
00000010
0V
AIN INPUT VOLTAGE (LSBs)
FS = 8V
1LSB = FS / 256
11111101
+FS
2
-FS
+ 1LSB
2
MAX154
MAX158
RD
RDY
*A2 ON MAX158.
CS
A1 A2*A0
5V
DATA BUS
A15
A0
ZBO
MREQ
WAIT
RD
DB0-DB7
D0-D7
ADDRESS
DECODE
EN
5k
ADDRESS BUS
R
S
V
IN
AIN1
C
S1
2pF
C
S2
2pF
32pF
B MUX
600Ω
R
ON
350Ω
MAX154
MAX158
AIN1
ONLY CHANNEL 1 SHOWN
V
REF
+
REFOUT
V
DD
V
REF
-
GND
11.5Ω
3.57k
10.0k
0.01µF
0.01µF
0.1µF47µF
16.2k
V
IN
+5V
CS
RDY
INT
DB0-DB7
RD
Figure 9a. Equivalent Input Circuit
Figure 10b. Transfer Function for ±4V Input Operation
Figure 11. Simple Mode 0 Interface
Figure 9b. RC Network Model
Figure 10a. Bipolar ±4V Input Operation
_Ordering Information (continued)
MAX154/MAX158
CMOS High-Speed 8-Bit ADCs with
Multiplexer and Reference
______________________________________________________________________________________ 11
MAX158
AIN2
18
26
+5V
12
23
24
25
15 14
AIN8
V
REF+
AIN1 CS
6
5
28
+5V
27
16
RD
A1
DB0-DB7
SPEECH
INPUT
A0
DATA
V
DD
AIN7
BANDPASS
FILTER 1
BANDPASS
FILTER 2
AMP
V
REF-
GND
BANDPASS
FILTER 7
BANDPASS
FILTER 8
A2
MAX154
AIN2
11
24 16 10
+5V
21
22
V
REF-
V
REF+
AIN1
INT
4
3
2
13
A0
DB0-DB7
V
DD
V
DD
SAMPLE
PULSE
V
SS
CS
RD
AIN3
1
AIN4
14
GND
12
A1
A0
A1
15
16
17
MAX506
4
18
3
+5V
+5V
6
5
A1
V
REF
AGND
DB0-DB7
2
V
OUT
A
1
20
19
V
OUT
B
V
OUT
C
V
OUT
D
A0
DGND
WR
Figure 12. Speech Analysis Using Real-Time Filtering
Figure 13. 4-Channel Fast Sample and Infinite Hold
PART
MAX154AEWG
MAX154BEWG
MAX154AEAG -40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE PIN-PACKAGE
24 Wide SO
24 Wide SO
24 SSOP
MAX154BEAG
MAX154AMRG
MAX154BMRG -55°C to +125°C
-55°C to +125°C
-40°C to +85°C 24 SSOP
24 CERDIP
24 CERDIP
MAX158ACPI
MAX158BCPI
ERROR
(LSB)
±
1
/
2
0°C to +70°C
0°C to +70°C 28 Plastic DIP
28 Plastic DIP
±1
±
1
/
2
±1
±
1
/
2
±1
±
1
/
2
±1
MAX158BC/D 0°C to +70°C Dice ±
1
/
2
MAX158ACWI 0°C to +70°C 28 Wide SO ±
1
/
2
MAX158BCWI 0°C to +70°C 28 Wide SO ±1
MAX158ACAI 0°C to +70°C 28 SSOP ±
1
/
2
MAX158BCAI 0°C to +70°C 28 SSOP ±1
MAX158AEPI -40°C to +70°C 28 Plastic DIP ±
1
/
2
MAX158BEPI -40°C to +85°C 28 Plastic DIP ±1
MAX158AEWI -40°C to +85°C 28 Wide SO ±
1
/
2
MAX158BEWI -40°C to +85°C 28 Wide SO ±1
MAX158AEAI -40°C to +85°C 28 SSOP ±
1
/
2
MAX154BENG -40°C to +85°C 24 Plastic DIP ±1
MAX154AENG -40°C to +85°C 24 Plastic DIP ±
1
/
2
MAX158BEAI -40°C to +85°C 28 SSOP ±1
MAX158AMJI -55°C to +125°C 28 CERDIP ±
1
/
2
MAX158BMJI -55°C to +125°C 28 CERDIP ±1
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12
__________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600
© 1996 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
MAX154/MAX158
CMOS High-Speed 8-Bit ADCs with
Multiplexer and Reference
________________________________________________________Package Information
___________________Chip Topography
L
DIM
A
A1
B
C
D
E
e
H
L
α
DIM
D
D
D
D
D
MIN
0.068
0.002
0.010
0.004
0.205
0.301
0.025
0˚
MIN
0.239
0.239
0.278
0.317
0.397
MAX
0.078
0.008
0.015
0.008
0.209
0.311
0.037
8˚
MAX
0.249
0.249
0.289
0.328
0.407
MIN
1.73
0.05
0.25
0.09
5.20
7.65
0.63
0˚
MIN
6.07
6.07
7.07
8.07
10.07
MAX
1.99
0.21
0.38
0.20
5.38
7.90
0.95
8˚
PINS
14
16
20
24
28
MAX
6.33
6.33
7.33
8.33
10.33
INCHES
INCHES
MILLIMETERS
MILLIMETERS
α
SSOP
SHRINK
SMALL-OUTLINE
PACKAGE
HE
D
A
A1
C
B
0.65 BSC0.0256 BSC
21-0056A
e
SEE VARIATIONS
A1
DB3
AIN3
(N.C.)
AIN4
(N.C.)
AIN5
(AIN1)
AIN6
(AIN2)
AIN7
(AIN3)
AIN8
(AIN4)
A0
INT
GND
0.127"
(3.228mm)
0.124"
(3.150mm)
V
REF
-
V
REF
+ ADY
A2 (N.C.)
DB7
DB6
DB5
DB4
CS
V
DD
A0
DB2
DB1
AIN2 (N.C.)
AIN1 (N.C.)
TP (REF OUT)
DB0
( ) ARE FOR MAX154/MX7824
P1-P3P4-P6P7-P9P10-P12

MAX154BEWG+T

Mfr. #:
Buy MAX154BEWG+T
Manufacturer:
Maxim Integrated
Description:
Analog to Digital Converters - ADC 8-Bit 4Ch 400ksps 5V Precision ADC
Lifecycle:
New from this manufacturer.
Delivery:
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