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PDF MAX1463 Data sheet ( Hoja de datos )
| Número de pieza | MAX1463 | |
| Descripción | Low-Power Two-Channel Sensor Signal Processor | |
| Fabricantes | Maxim Integrated | |
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19-2549; Rev 0a; 11/04
Low-Power Two-Channel Sensor
Signal Processor
General Description
The MAX1463 is a highly integrated, low-power, two-
channel sensor signal processor optimized for industri-
al and process control applications such as pressure
sensing and compensation, RTD and thermal-couple
linearization, weight sensing and classification, and
remote process monitoring with limit indication.
The MAX1463 accommodates sensors with outputs
ranging from 1mV/V to 1V/V and supports both pro-
grammable current and voltage sensor excitation. The
MAX1463 provides amplification, calibration, signal lin-
earization, and temperature compensation that enable
an overall performance approaching the inherent
repeatability of the sensor without requiring any exter-
nal trim components.
Two 16-bit voltage output DACs and two 12-bit PWMs
can be used to indicate each of the temperature-com-
pensated sensor signals independently, as a sum or
difference signal, or user-defined relationship between
each signal and temperature. Uncommitted op amps
are available for buffering the DAC outputs, driving
heavier external loads, or providing additional gain and
filtering.
The MAX1463 incorporates a 16-bit CPU, user-pro-
grammable 4kB of FLASH program memory, 128 bytes
of FLASH user information, one 16-bit ADC, two 16-bit
DACs, two 12-bit PWM digital outputs, four rail-to-rail op
amps, one SPI™-compatible interface, two GPIOs, and
one on-chip temperature sensor.
The MAX1463 operates from a single 5.0V supply and
is packaged for automotive, industrial, and commercial
temperature ranges in a 28-pin SSOP package.
Applications
Pressure Sensor Signal Conditioning
Weight Measurement Systems
Thermocouple and RTD Linearization
Transducers and Transmitters
Process Indicators
Calibrators and Controllers
GMR and MR Magnetic Direction Sensors
Functional Diagram and Detailed Block Diagram appear at
end of data sheet.
SPI is a trademark of Motorola, Inc.
Features
♦ Programmable Amplification, Calibration,
Linearization, and Temperature Compensation
♦ Two Differential or Four Single-Ended Sensor
Input Channels
♦ Accommodates Sensor Output Sensitivities from
1mV/V to 1V/V
♦ Two DAC/PWM Output Signal Channels
♦ 4–20mA Output Capability
♦ 4kB of FLASH Memory for Code and Coefficients
♦ 128 Bytes of FLASH Memory for User Information
♦ Integrated Temperature Sensor
♦ Flexible Dual Op-Amp Blocks
♦ Programmable Sensor Input Gain and Offset
♦ Programmable Sensor Sampling Rate and
Resolution
♦ Programmable Current Excitation Source for
Bridge Sensors
♦ Buffered 1.25V Output Reference
♦ No External Trim Components Required
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX1463CAI
0°C to +70°C
28 SSOP
MAX1463C/W*
0°C to +70°C
Die
MAX1463EAI
-40°C to +85°C
28 SSOP
MAX1463AAI
-40°C to +125°C 28 SSOP
*Dice are tested at TA = +25°C, DC parameters only.
Pin Configuration
TOP VIEW
OUT1SM 1
AMP1M 2
AMP1P 3
OUT1LG 4
VBG 5
VDD 6
N.C. 7
CKSEL 8
CKIO 9
CS 10
DO 11
DI 12
SCLK 13
VSS 14
MAX1463
SSOP
28 OUT2SM
27 AMP2M
26 AMP2P
25 OUT2LG
24 ISRC
23 INP1
22 INM1
21 INP2
20 INM2
19 VREF
18 VSS
17 GPIO2
16 GPIO1
15 VDDF
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
Low-Power Two-Channel Sensor
Signal Processor
ELECTRICAL CHARACTERISTICS (continued)
(VDD = 5.0V, VSS = 0V, fCLK = 4.0MHz, TA = TMIN to TMAX. Typical values are at TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
LARGE OP AMP
Input Offset Voltage
Input Bias Current
VOS_LG
IB_LG
DC Gain
AVOL_LG
OUTnLG = 0.5V to 4.5V (n = 1 or 2),
RLOAD = ∞
Gain Bandwidth Product
Slew Rate
Common-Mode Input Range
GBW_LG
SR_LG
CMR_LG
AVOL_LG = +1V/V
AVOL_LG = +1V/V
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
CMRR_LG VCM OPAMP = VSS to VDD
PSRR_LG At DC
Input-Referred Noise Voltage
VN_LG
0.1Hz to 1kHz
0.1Hz to 1MHz
Output High Voltage
Output Low Voltage
Output Source Current
Output Sink Current
Maximum Output Load
Capacitance
VOH_LG
VOL_LG
ISRC_LG
ISNK_LG
CL_LG
RLOAD = ∞
RLOAD = 1kΩ to VSS
RLOAD = ∞
RLOAD = 1kΩ to VDD
VOUTnLG = VOH_LG, RLOAD = 1kΩ to VSS
VOUTnLG = VOL_LG, RLOAD = 1kΩ to VDD
RLOAD = ∞, phase margin > 55°
OP-AMP SWITCH
Analog Signal Range
On-Resistance
Off-Isolation
VSW
RON
VISO
DIGITAL-TO-ANALOG CONVERTER
Resolution
RESDAC
Integral Nonlinearity
Differential Nonlinearity
INLDAC
DNLDAC
Offset Error
VDAC OS DAC ref = VDD, DAC data = 0000h
Bit Weight
Power-Supply Rejection Ratio
Output Noise
Output Settling Time
PULSE-WIDTH MODULATOR
Resolution
Period
BWDAC
PSRRDAC
ONDAC
STDAC
DAC ref = 5VDC
At DC, DAC ref = VREF
DAC buffer is the small op amp
To 0.1% of final value
RESPWM (Note 6)
PPWM fCLK = 4.0MHz
MIN TYP MAX UNITS
VSS
4.95
4.90
0
±225
100
4.0
3.2
70
70
19
160
200
±4
VDD
0.03
0.12
-4.9
4.9
mV
nA
dB
MHz
V/µs
V
dB
dB
µVRMS
V
V
mA
mA
pF
VSS
VDD
V
5 kΩ
80 dB
VDD / 2
- 0.05
16
3
±1
91.55
60
±3
250
VDD / 2
+ 0.05
Bits
Bits
Bits
V
µV/LSB
dB
LSB
µs
12
8.192
Bits
ms
_______________________________________________________________________________________ 5
5 Page 
Low-Power Two-Channel Sensor
Signal Processor
Typical Operating Characteristics (continued)
(VDD = 5.0V, TA = +25°C, unless otherwise noted.)
DAC DYNAMIC RESPONSE
5
DAC CODE = 4000h
4
1V/div 3
2
1
DAC CODE = C000h
0
200µs/div
INTERNAL OSCILLATOR FREQUENCY
vs. SUPPLY VOLTAGE
4.15
4.10
TA = -40°C
4.05
4.00 TA = +25°C
3.95 TA = +125°C
3.90 OSCILLATOR
FREQUENCY TRIMMED
3.85 TO 4MHz AT +25°C,
VDD = 5V
3.80
4.5 4.7 4.9
5.1
5.3
SUPPLY VOLTAGE, VDD (V)
5.5
DAC RATIOMETRICITY ERROR
vs. SUPPLY VOLTAGE
0.05
0.04 DAC INPUT = 5555CH (4.5V AT VDD = 5V)
0.03 DAC INPUT = 0000CH (2.5V AT VDD = 5V)
0.02
0.01
0
-0.01
-0.02
DAC INPUT = AAABCH (0.5V AT VDD = 5V)
-0.03
-0.04
-0.05
4.5
4.7 4.9 5.1 5.3
SUPPLY VOLTAGE, VDD (V)
5.5
TEMPERATURE SENSOR OUTPUT
vs. TEMPERATURE
18000
16000
14000
12000
10000
8000
-40 -13 15 43 70 98 125
TEMPERATURE (°C)
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX1463.PDF ] | |
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