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PDF MAX1464 Data sheet ( Hoja de datos )
| Número de pieza | MAX1464 | |
| Descripción | Low-Noise Multichannel Sensor Signal Processor | |
| Fabricantes | Maxim Integrated | |
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Hay una vista previa y un enlace de descarga de MAX1464 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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MAX1464
EVALUATION KIT AVAILABLE
Low-Power, Low-Noise Multichannel
Sensor Signal Processor
General Description
The MAX1464 is a highly integrated, low-power, low-noise
multichannel sensor signal processor optimized for indus-
trial, and process-control applications such as pressure
sensing and compensation, RTD and thermocouple lin-
earization, weight sensing and classification, and remote
process monitoring with limit indication.
The MAX1464 accepts sensors with either single-ended
or differential outputs. The MAX1464 accommodates sen-
sor output sensitivities from 1mV/V to 1V/V. The MAX1464
provides amplification, calibration, signal linearization,
and temperature compensation that enable an overall
performance approaching the inherent repeatability of the
sensor without requiring any external trim components.
Two 16-bit voltage-output DACs and two 12-bit PWMs can
be used to indicate each of the temperature-compensated
sensor signals independently, as a sum or difference
signal, or user-defined relationship between each signal
and temperature. Uncommitted op amps are available to
buffer the DAC outputs, drive heavier external loads, or
provide additional gain and filtering.
The MAX1464 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 MAX1464 operates from a single 5.0V (typ) supply
and is packaged for automotive, industrial, and commer-
cial 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 ADC Input
Channels
●● Accommodates Sensor Output Sensitivities from
1mV/V to 1V/V
●● Two DAC/PWM Output Signal Channels
●● Supports 4–20mA Current Loop Applications
●● 4kB of FLASH Memory for Code and Coefficients
●● 128 Bytes of FLASH Memory for User Information
●● Integrated Temperature Sensing
●● Flexible Dual Op-Amp Block
●● Programmable Sensor Input Gain and Offset
●● Programmable Sensor Sampling Rate and Resolution
●● No External Trim Components Required
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX1464CAI
0°C to +70°C
28 SSOP
MAX1464C/W*
0°C to +70°C
Die
MAX1464EAI
-40°C to +85°C
28 SSOP
MAX1464AAI
-40°C to +125°C
28 SSOP
*Dice are tested at TA = +25°C, DC parameters only.
Ordering Information
TOP VIEW
OUT1SM 1
AMP1M 2
AMP1P 3
OUT1LG 4
N.C. 5
VDD 6
N.C. 7
CKSEL 8
CKIO 9
CS 10
DO 11
DI 12
SCLK 13
VSS 14
MAX1464
28 OUT2SM
27 AMP2M
26 AMP2P
25 OUT2LG
24 VREF
23 INP1
22 INM1
21 INP2
20 INM2
19 VSS
18 VSSF
17 GPIO2
16 GPIO1
15 VDDF
SSOP
19-3579; Rev 1; 9/14
1 page  
MAX1464
Low-Power, Low-Noise Multichannel
Sensor Signal Processor
Electrical Characteristics (continued)
(VDDF = VDD = 4.5V to 5.5V, VSSF = VSS = 0V, fCLK = 4.0MHz, TA = TMIN to TMAX. Typical values are at VDDF = VDD = 5.0V, VSSF
= VSS = 0V, TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
LARGE OP AMP
Input Offset Voltage
Input Bias Current
DC Gain
Gain Bandwidth Product
Slew Rate
SYMBOL
CONDITIONS
VOS_LG
IB_LG
AVOL_LG
GBW_LG
SR_LG
OUTnLG = 0.5V to 4.5V (n = 1 or 2),
RLOAD = ∞
AVOL_LG = +1V/V
AVOL_LG = +1V/V
Common-Mode Input Range
CMR_LG
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Input-Referred Noise Voltage
CMRR_LG
PSRR_LG
VN_LG
VCM OPAMP = VSS to VDD
At DC
0.1Hz to 1kHz
0.1Hz to 1MHz
Output-Voltage High
Output-Voltage Low
Output Source Current
Output Sink Current
Maximum Output Load
Capacitance
VOH_LG
VOL_LG
ISRC_LG
ISNK_LG
CL_LG
RLOAD = ∞
RLOAD = 1kW 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
VSW
On-Resistance
RON
Off-Isolation
VISO
DIGITAL-TO-ANALOG CONVERTER
Resolution
Integral Nonlinearity
Differential Nonlinearity
RESDAC
INLDAC
DNLDAC
Offset Error
VDAC OS DAC ref = VDD, DAC data = 0000h
Bit Weight
Power-Supply Rejection
Output Noise
Output Settling Time
PULSE-WIDTH MODULATOR
Resolution
Period
BWDAC
PSRDAC
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
0
±225
100
4.0
3.2
VSS +
0.02
70
70
19
160
VDD - 0.1
VDD - 0.125
200
±6
VDD -
0.02
0.03
0.13
-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
- 0.06
16
3
±1
91.55
0.02
±3
250
VDD/2
+ 0.06
Bits
Bits
Bits
V
µV/LSB
%FS
LSB
µs
12
8.192
Bits
ms
www.maximintegrated.com
Maxim Integrated │ 5
5 Page 
MAX1464
Low-Power, Low-Noise Multichannel
Sensor Signal Processor
Pin Description
PIN
1
2
3
4
5, 7
6
8
9
10
11
12
13
14, 19
15
16
17
18
20
21
22
23
24
25
26
27
28
NAME
OUT1SM
AMP1M
AMP1P
OUT1LG
N.C.
VDD
CKSEL
CKIO
CS
DO
DI
SCLK
VSS
VDDF
GPIO1
GPIO2
VSSF
INM2
INP2
INM1
INP1
VREF
OUT2LG
AMP2P
AMP2M
OUT2SM
FUNCTION
Small Op Amp 1 Output
Op Amp 1 Negative Input
Op Amp 1 Positive Input
Large Op Amp 1 Output
No Connection
Positive Supply Voltage Input. Bypass VDD to VSS with a 0.1µF ceramic capacitor.
Clock-Select Digital Input
Clock Digital Input/Output
SPI Chip-Select Digital Input. Active low.
SPI Data Output
SPI Data Input
SPI Interface Clock
Negative Power-Supply Input
Positive Supply Voltage for FLASH Memory. Bypass VDDF to VSS with a 0.1µF ceramic capacitor.
General-Purpose Digital Input/Output 1
General-Purpose Digital Input/Output 2
Negative Power-Supply Input for FLASH Memory
Negative Input for ADC Channel 2
Positive Input for ADC Channel 2
Negative Input for ADC Channel 1
Positive Input for ADC Channel 1
External Reference Voltage Input for ADC and DACs
Large Op Amp 2 Output
Op Amp 2 Positive Input
Op Amp 2 Negative Input
Small Op Amp 2 Output
www.maximintegrated.com
Maxim Integrated │ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX1464.PDF ] | |
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