MAX198BCNI Maxim Integrated Products, MAX198BCNI Datasheet

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MAX198BCNI

Manufacturer Part Number
MAX198BCNI
Description
ADC Single SAR 100KSPS 12-Bit Parallel 28-Pin PDIP N
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX198BCNI

Package
28PDIP N
Resolution
12 Bit
Sampling Rate
100 KSPS
Architecture
SAR
Number Of Adcs
1
Number Of Analog Inputs
6
Digital Interface Type
Parallel
Input Type
Voltage
Polarity Of Input Voltage
Unipolar|Bipolar
The MAX196/MAX198 multirange, 12-bit data-acquisi-
tion systems (DAS) require only a single +5V supply for
operation, yet convert analog signals at their inputs up
to ±10V (MAX196) and ±4V (MAX198). These systems
provide six analog input channels that are indepen-
dently software programmable for a variety of ranges:
±10V, ±5V, 0V to +10V, and 0V to +5V for the MAX196;
±V
the MAX198. This range switching increases the effec-
tive dynamic range to 14 bits and provides the flexibility
to interface ±12V, ±15V, and 4mA to 20mA powered
sensors to a single +5V system. In addition, these con-
verters are fault protected to ±16.5V; a fault condition
on any channel will not affect the conversion result of
the selected channel. Other features include a 5MHz
bandwidth track/hold, 100ksps throughput rate, soft-
ware-selectable internal/external clock, internal/external
acquisition control, 12-bit parallel interface, and internal
4.096V or external reference.
Two programmable power-down modes (STBYPD,
FULLPD) provide low-current shutdown between con-
versions. In STBYPD mode, the reference buffer
remains active, eliminating start-up delays.
The MAX196/MAX198 employ a standard microproces-
sor (µP) interface. A three-state data I/O port is config-
ured to operate with 16-bit data buses, and data-
access and bus-release timing specifications are com-
patible with most popular µPs. All logic inputs and out-
puts are TTL/CMOS compatible.
These devices are available in 28-pin DIP, wide SO,
SSOP (55% smaller in area than wide SO), and ceramic
SB packages. For 8+4 bus interface, see the MAX197
and the MAX199 data sheets. An evaluation kit will be
available after December 1995 (MAX196EVKIT-DIP).
________________________Applications
19-0435; Rev 0; 9/95
Functional Diagram appears at end of data sheet.
Call toll free 1-800-722-8266 for free samples or literature.
_______________General Description
REF
, ±V
Industrial-Control Systems
Robotics
Data-Acquisition Systems
Automatic Testing Systems
Medical Instruments
Telecommunications
REF
/2, 0V to +V
________________________________________________________________ Maxim Integrated Products
REF
, and 0V to +V
Multirange, Single +5V, 12-Bit DAS
REF
/2 for
with 12-Bit Bus Interface
____________________________Features
Ordering Information continued at end of data sheet.
__________________Pin Configuration
______________Ordering Information
MAX196ACNI
MAX196BCNI
MAX196ACWI
MAX196BCWI
MAX196ACAI
MAX196BCAI
12-Bit Resolution, 1/2LSB Linearity
Single +5V Supply Operation
Software-Selectable Input Ranges:
±10V, ±5V, 0V to +10V, 0V to +5V (MAX196)
±V
(MAX198)
Internal 4.096V or External Reference
Fault-Protected Input Multiplexer
6 Analog Input Channels
6µs Conversion Time, 100ksps Sampling Rate
Internal or External Acquisition Control
Two Power-Down Modes
Internal or External Clock
TOP VIEW
PART
REF
, ±V
REF
CLK
D11
D10
CS
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
DIP/SO/SSOP/Ceramic SB
/2, 0V to +V
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
10
11
12
13
14
1
2
3
4
5
6
7
8
9
MAX196
MAX198
REF
, 0V to +V
PIN-PACKAGE
28 Narrow Plastic DIP
28 Narrow Plastic DIP
28 Wide SO
28 Wide SO
28 SSOP
28 SSOP
25
24
23
19
18
17
16
15
28
27
26
22
21
20
DGND
V
WR
RD
INT
REF
REFADJ
CH5
CH4
CH3
CH2
CH1
CH0
AGND
DD
REF
/2
1

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MAX198BCNI Summary of contents

Page 1

... Robotics Data-Acquisition Systems Automatic Testing Systems Medical Instruments Telecommunications Functional Diagram appears at end of data sheet. ________________________________________________________________ Maxim Integrated Products Call toll free 1-800-722-8266 for free samples or literature. with 12-Bit Bus Interface ____________________________Features 12-Bit Resolution, 1/2LSB Linearity Single +5V Supply Operation Software-Selectable Input Ranges: ± ...

Page 2

Multirange, Single +5V, 12-Bit DAS with 12-Bit Bus Interface ABSOLUTE MAXIMUM RATINGS V to AGND............................................................-0.3V to +7V DD AGND to DGND.....................................................-0.3V to +0.3V REF to AGND..............................................-0. REFADJ to AGND.......................................-0. Digital Inputs to DGND...............................-0. Digital ...

Page 3

Multirange, Single +5V, 12-Bit DAS ELECTRICAL CHARACTERISTICS (continued ±5%; unipolar/bipolar range; external reference mode with 50% duty cycle unless otherwise noted. Typical values are MIN MAX ...

Page 4

Multirange, Single +5V, 12-Bit DAS with 12-Bit Bus Interface ELECTRICAL CHARACTERISTICS (continued ±5%; unipolar/bipolar range; external reference mode with 50% duty cycle unless otherwise noted. Typical values are at ...

Page 5

Multirange, Single +5V, 12-Bit DAS ELECTRICAL CHARACTERISTICS (continued ±5%; unipolar/bipolar range; external reference mode with 50% duty cycle unless otherwise noted. Typical values are MIN MAX ...

Page 6

Multirange, Single +5V, 12-Bit DAS with 12-Bit Bus Interface __________________________________________Typical Operating Characteristics (T = +25°C, unless otherwise noted.) A INTEGRAL NONLINEARITY vs. DIGITAL CODE 0.250 0.200 0.150 0.100 0.050 0 -0.050 -0.100 -0.150 0 1000 2000 3000 4000 DIGITAL CODE ...

Page 7

Multirange, Single +5V, 12-Bit DAS ______________________________________________________________Pin Description PIN NAME Clock Input. In external clock mode, drive CLK with a TTL/CMOS-compatible clock. In internal clock mode, 1 CLK place a capacitor (C with C = 100pF. CLK 2 CS Chip Select, ...

Page 8

Multirange, Single +5V, 12-Bit DAS with 12-Bit Bus Interface Acquisition time is calculated as follows: For REF For / ...

Page 9

Multirange, Single +5V, 12-Bit DAS Table 2. Control-Byte Format D7 (MSB PD1 PD0 ACQMOD BIT NAME 7, 6 PD1, PD0 These two bits select the clock and power-down modes (Table 4). 5 ACQMOD 0 = internally controlled acquisition ...

Page 10

Multirange, Single +5V, 12-Bit DAS with 12-Bit Bus Interface The control byte is latched into the device, on pins D7–D0, during a write cycle. Table 2 shows the control- byte format. Output Data Format The output data format is binary ...

Page 11

Multirange, Single +5V, 12-Bit DAS CSWS CSHW CONTROL D7–D0 BYTE ACQMOD = "1" INT RD DOUT Figure 6. Conversion Timing Using External Acquisition Mode The MAX196/MAX198 operate with ...

Page 12

Multirange, Single +5V, 12-Bit DAS with 12-Bit Bus Interface ACQUISITION STARTS CLK t CWS WR ACQMOD = "0" t ACQUISITION STARTS CWH CLK WR ACQMOD = "0" Figure 8a. External Clock and WR Timing (Internal Acquisition Mode) ACQUISITION STARTS CLK ...

Page 13

Multirange, Single +5V, 12-Bit DAS __________Applications Information Power-On Reset At power-up, the internal power-on reset circuitry sets INT high and puts the device in normal operation/exter- nal clock mode. This state is selected to keep the inter- nal clock from ...

Page 14

Multirange, Single +5V, 12-Bit DAS with 12-Bit Bus Interface results may be read. Input overvoltage protection is active in all power-down modes. The device returns to normal operation on the first WR falling edge during write operation. Choosing Power-Down Modes ...

Page 15

Multirange, Single +5V, 12-Bit DAS Layout, Grounding, and Bypassing Careful printed circuit board layout is essential for best system performance. For best performance, use a ground plane. To reduce crosstalk and noise injection, keep analog and digital signals separate. Digital ...

Page 16

... SSOP MAX196AMYI -55°C to +125°C 28 Narrow Ceramic SB** MAX196BMYI -55°C to +125°C 28 Narrow Ceramic SB** MAX198ACNI 0°C to +70°C 28 Narrow Plastic DIP MAX198BCNI 0°C to +70°C 28 Narrow Plastic DIP MAX198ACWI 0°C to +70°C 28 Wide SO MAX198BCWI 0°C to +70°C 28 Wide SO MAX198ACAI 0°C to +70°C ...

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