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MAX132CWG

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
_______________General Description
The MAX132 is a CMOS, 18-bit plus sign, serial-output,
analog-to-digital converter (ADC). Multi-slope integra-
tion provides high-resolution conversions in less time
than standard integrating ADCs, allowing operation up
to 100 conversions per second. Low conversion noise
provides guaranteed operation with ±512mV full-scale
input range (2µV/LSB). A simple 4-wire serial interface
connects easily to all common microprocessors, and
twos-complement output coding simplifies bipolar mea-
surements. Typical supply current is only 60µA and is
reduced to 1µA in sleep mode. Four serially pro-
grammed digital outputs can be used to control an
external multiplexer or programmable-gain amplifier.
The MAX132 comes in 24-pin narrow DIP and wide SO
packages, and is available in commercial and extend-
ed temperature grades.
High resolution, compact size, and low power make this
device ideal for data loggers, weigh scales, data-acqui-
sition systems, and panel meters.
________________________Applications
Remote Data Acquisition
Battery-Powered Instruments
Industrial Process Control
Transducer-Signal Measurement
Pressure, Flow, Temperature, Voltage
Current, Resistance, Weight
____________________________Features
♦ Low Supply Current:
60µA (Normal Operation)
1µA (Sleep-Mode Operation)
♦ ±0.006% FSR Accuracy at 16 Conv/sec
♦ Low Noise: 15µV
RMS
♦ Serial I/O Interface with Programmed Output for
Mux and PGA
♦ Performs up to 100 Conv/sec
♦ ±2pA Input Current
♦ 50Hz/60Hz Rejection
MAX132
±18-Bit ADC with Serial Interface
________________________________________________________________
Maxim Integrated Products
1
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
V+
BUF OUT
INT OUT
INT IN
SCLK
DOUT
DIN
CS
TOP VIEW
CREF-
CREF+
REF+
REF-
P1
P0
OSC1
OSC2
16
15
14
13
9
10
11
12
AGND
IN LO
IN HI
V-
DGND
EOC
P3
P2
DIP/SO
MAX132
__________________Pin Configuration
MAX132
CREF- CREF+
CS
602k
SCLK
DOUT
DIN
EOC
P0
P1
P2
P3
-5V
±512mV INPUT
BUF OUT
INT OUT
INT IN
4.7nF
REF+
REF-
AGND
IN LO
IN HI
V-
V+
DGND
OSC2OSC1
+5V
________________Functional Diagram
Call toll free 1-800-998-8800 for free samples or literature.
19-0009; Rev 2; 8/95
PART
MAX132CNG
MAX132CWG
MAX132C/D 0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
24 Narrow Plastic DIP
24 Wide SO
Dice*
EVALUATION KIT MANUAL
FOLLOWS DATA SHEET
______________Ordering Information
* Contact factory for dice specifications.
** Contact factory for availability and processing to MIL-STD-883.
MAX132ENG
MAX132EWG
MAX132MRG -55°C to +125°C
-40°C to +85°C
-40°C to +85°C 24 Narrow Plastic DIP
24 Wide SO
24 Narrow CERDIP**
MAX132
±18-Bit ADC with Serial Interface
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V+ = 5V, V- = -5V, DGND = AGND = IN LO = REF- = 0V, REF+ = 545mV, R
INT
= 602kΩ, C
INT
= 0.0047µF, C
REF
= 0.1µF,
f
CLK
= 32,768Hz, 60Hz mode, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage
V+ to DGND..............................................-0.3V < V+ < +6.0V
V- to DGND ................................................+0.3V < V- < -9.0V
V+ to V-............................................................................+15V
Analog Input Voltage (any input).....................................V+ to V-
Digital Input Voltage .....................(DGND - 0.3V) to (V+ + 0.3V)
Continuous Power Dissipation
Narrow Plastic DIP (derate 8.70mW/°C above +70°C)....478mW
Wide SO (derate 11.76mW/°C above +70°C)..............647mW
Narrow CERDIP (derate 12.50mW/°C above +70°C) ..688mW
Operating Temperature Ranges
MAX132C_ _ .......................................................0°C to +70°C
MAX132E_ _ ....................................................-40°C to +85°C
MAX132MRG.................................................-55°C to +125°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
Bits
±18Resolution
UNITSMIN TYP MAXPARAMETER
(Note 1)
CONDITIONS
V
IN
HI = 0V % of FSR
±0.0168
0 ±0.0076
Zero Error
f
CLK
= 32.768Hz
(Note 4)
ms63
±0.032
Rollover Error
(Notes 2, 3)
% of FSR
0 ±0.010
% of FSR±0.0015 ±0.006Integral Nonlinearity
IN HI = IN LO V±3.0
Input Voltage Range
Common-Mode Range
(Note 3) ppm/°C±5Scale Factor Temp. Coefficient
(Note 3) ppm/°C±0.15 ±1.5
µV15RMS Noise
Zero-Reading Drift
mV±512
Conversion Time
V
IN
HI = 400mV, V- = -5.0V,
4.5V ≤ V+ ≤ 5.5V
±0.003 ±0.0168
% of FSR
±0.003 ±0.0061
Positive Supply Rejection
Digital input = 0V or V+
Digital input = 0V or V+
µA110
µA-25 -60Digital Ground Supply Current
Positive Sleep-Mode Current
Digital input = 0V or V+
Digital input = 0V or V+
µA-35 -65
µA60 125Positive Supply Current
Negative Supply Current
Digital input = 0V or V+ µA-1 -10Negative Sleep-Mode Current
V-5.5 -4.5
V4.5 5.5Positive Supply Voltage
Negative Supply Voltage
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= +25°C
T
A
= T
MIN
to T
MAX
IN HI to IN LO, for specified accuracy
% of FSR
±0.25 ±0.50
Common-Mode Rejection Ratio IN HI = IN LO
±0.009 ±0.032V
CM
= ±500mV
V
CM
= ±3.0V
pA
±12 ±250
Leakage Current IN HI, IN LO
±2 ±10T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= +25°C
T
A
= T
MIN
to T
MAX
T
A
= T
MIN
to T
MAX
T
A
= +25°C
V
IN
HI = 400mV, V- = 5.0V,
-5.5V ≤ V- ≤ -4.5V
±0.003 ±0.0168
% of FSR
±0.003 ±0.0061
Negative Supply Rejection
Digital input = 0V or V+ µA0±2
Digital Ground Sleep-Mode
Current
T
A
= +25°C
% of FSR±3.1Read-Zero 50Hz/60Hz Range
ACCURACY
POWER REQUIREMENTS
MAX132
±18-Bit ADC with Serial Interface
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 5V, V- = -5V, DGND = AGND = IN LO = REF- = 0V, REF+ = 545mV, R
INT
= 602kΩ, C
INT
= 0.0047µF, C
REF
= 0.1µF,
f
CLK
= 32,768Hz, 60Hz mode, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
INTERFACE TIMING
(Test Circuit of Figure 1, Figure 2, V+ = 5V, V- = -5V, DGND = AGND = 0V, T
A
= +25°C, unless otherwise noted.) (Note 3)
Note 1: ±18-bit accuracy achieved by averaging multiple conversions.
Note 2: Maximum deviation from best straight-line fit.
Note 3: Guaranteed by design, not tested.
Note 4: Difference in reading for equal positive and negative inputs near full scale.
DOUT, I
OUT
= -100µA
DOUT, I
OUT
= -1mA
CS, DIN, SCLK, and DOUT when three-stated
CS, DIN, SCLK, and DOUT when three-stated
Referred to DGND, 4.5V ≤ V+ ≤ 5.5V, CS, DIN, SCLK
EOC, P0–P3, I
OUT
= -100µA
DOUT, I
OUT
= 1.6mA
EOC, P0–P3, I
OUT
= 100µA
Referred to DGND, 4.5V ≤ V+ ≤ 5.5V, CS, DIN, SCLK
CONDITIONS
4.0 4.5
3.5 4.3
pF5C
IN
Input Capacitance
nA±10 ±500I
IN
Input Current
V0.8V
IL
Input Low
V
4.0 4.7
V
OH
Output High
0.1 0.4
V
0.1 0.4
V
OL
Output Low
V2.4V
IH
Input High
UNITSMIN TYP MAXSYMBOLPARAMETER
CONDITIONS
ns500t
1
CS Lead Time
µs1t
5
CS High Pulse Width
ns300t
4
S
CLK
Low Time
ns400t
3
S
CLK
High Time
ns400t
2
CS Lag Time
UNITSMIN TYP MAXSYMBOLPARAMETER
See Figure 4
See Figure 3
ns0t
6
DIN to SCLK Setup Time
ns320t
10
DOUT Disable Time to Three-State
ns60t
9
Data Valid
ns320t
8
DOUT Access Time from Three-State
ns200t
7
DIN to SCLK Hold Time
ns230 350t
12
Delay to P0–P3 Low
ns230 350t
11
Delay to P0–P3 High
DIGITAL SECTION
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX132CWG

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Buy MAX132CWG
Manufacturer:
Maxim Integrated
Description:
Analog to Digital Converters - ADC 18-Bit ADC with Serial Interface
Lifecycle:
New from this manufacturer.
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