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PDF ZSSC3015 Data sheet ( Hoja de datos )
| Número de pieza | ZSSC3015 | |
| Descripción | Sensor Signal Conditioner | |
| Fabricantes | IDT | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ZSSC3015 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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RBicdLite-AutoTM Sensor Signal
Conditioner with Diagnostics
ZSSC3015
Datasheet
Brief Description
The ZSSC3015 sensor signal conditioner IC is
adjustable to nearly all piezo-resistive bridge
sensors. Measured and corrected bridge values are
provided at the Sig™ pin, which can be configured
as an analog voltage output or as a one-wire serial
digital output.
The ZACwire™ digital one-wire interface (OWI) can
be used for a simple PC-controlled calibration
procedure to program a set of calibration coefficients
into an on-chip EEPROM. The calibrated ZSSC3015
and a specific sensor are mated digitally: fast,
precise, and without the cost overhead associated
with trimming by external devices or laser. Integrated
diagnostics functions make the ZSSC3015 parti-
cularly well suited for automotive applications.
Features
• Digital compensation of sensor offset, sensitivity,
temperature drift, and nonlinearity
• Programmable analog gain and digital gain;
accommodates bridges with spans < 1mV/V
and high offset
• Many diagnostic features on chip (e.g., EEPROM
signature, bridge connection checks, bridge short
detection, power loss detection)
• Independently programmable high and low
clipping levels
• 24-bit customer ID field for module traceability
• Internal temperature compensation reference (no
external components)
• Option for external temperature compensation
with addition of single diode
• Output options: rail-to-rail ratiometric analog
voltage (12-bit resolution), absolute analog
voltage, ZACwire™ digital one-wire interface
• Fast power-up to data out response; output
available 5ms after power-up
• Current consumption depends on programmed
sample rate and mode: 1mA down to 300µA (typ.)
• Fast response time: 1.4ms typical
• High voltage protection: ≤ 30V with external JFET
• AEC-Q100 qualified
Benefits
• No external trimming components required
• PC-controlled configuration and calibration via
ZACwire™ one-wire interface – simple, low cost
• High accuracy (as high as ±0.1% FSO @ -25 to
85°C; ±0.25% FSO @ -50 to 150°C)
• Single-pass calibration – quick and precise
Available Support
• Evaluation Kit available
• Mass Calibration System available
• Support for industrial mass calibration available
• Quick circuit customization possible for large
production volumes
Physical Characteristics
• Wide operation temperature: –50°C to +150°C
• Supply voltage 2.7 to 5.5V; with external JFET,
5.5 to 30V
• Small SOP8 package
ZSSC3015 Application Circuit
VDD
Sig™
ZSSC3015
VBP
VBN
Vgate
VSS
Vsupply
+2.7 to +5.5 V
OUT/OWI
0.1 µF
Ground
© 2016 Integrated Device Technology, Inc.
1
January 20, 2016
1 page  
ZSSC3015 Datasheet
Figure 6.1 ZSSC3015 Pin-Out Diagram ............................................................................................................ 44
List of Tables
Table 1.1
Table 1.2
Table 1.3
Table 1.4
Table 2.1
Table 2.2
Table 3.1
Table 3.2
Table 3.3
Table 3.4
Table 3.5
Table 3.6
Table 3.7
Table 3.8
Table 3.9
Table 3.10
Table 3.11
Table 3.12
Table 6.1
ADC Resolution Characteristics for an Analog Gain of 6 ................................................................... 9
ADC Resolution Characteristics for an Analog Gain of 24 ................................................................. 9
ADC Resolution Characteristics for an Analog Gain of 48 ............................................................... 10
ADC Resolution Characteristics for an Analog Gain of 96 ............................................................... 10
1V Reference Trim (1V vs. Trim for Nominal Process Run)............................................................. 17
Summary of Diagnostic Features ..................................................................................................... 18
Update Rate for Analog Output ........................................................................................................ 22
ZACwire™ Parameters ..................................................................................................................... 23
Idle Time between Packets versus Update Rate.............................................................................. 26
Total Transmission Time for Different Update Rate and Output Configurations .............................. 27
Command/Data Bytes Encoding....................................................................................................... 28
ZSSC3015 EEPROM Bits................................................................................................................. 31
Correction Coefficients ..................................................................................................................... 34
Gain_B [13:0] Weightings ................................................................................................................. 35
Offset_B Weightings ......................................................................................................................... 36
Gain_T Weightings ........................................................................................................................... 36
Offset_T Weightings ......................................................................................................................... 37
EEPROM Read Order ...................................................................................................................... 38
ZSSC3015 Pin Configuration............................................................................................................ 44
© 2016 Integrated Device Technology, Inc.
48
January 20, 2016
5 Page 
ZSSC3015 Datasheet
2 Circuit Description
2.1. Signal Flow and Block Diagram
The ZSSC3015 resistive bridge sensor interface ICs were specifically designed as cost-effective solutions for
sensing in building automation, automotive, industrial, office automation, and white goods applications. The
ZSSC3015 employs IDT’s high precision bandgap with proportional-to-absolute-temperature (PTAT) output; low-
power 14-bit analog-to-digital converter (ADC, A2D, A-to-D); and an on-chip digital signal processor (DSP) core
with EEPROM to precisely calibrate the bridge output signal.
Three selectable outputs, two analog and one digital, offer the ultimate in versatility across many applications.
The ZSSC3015 rail-to-rail ratiometric analog Vout signal (0V to ~5 V Vout @ VDD=5V) suits most building automation
and automotive requirements (12-bit resolution). Typical office automation and white goods applications require
the 0 to ~1V Vout signal, which in the ZSSC3015 is referenced to the internal bandgap. The ZSSC3015 is capable
of running in high-voltage (5.5 to 30 V) systems when combined with an external JFET.
Direct interfacing to µP controllers is facilitated via IDT’s single-wire serial ZACwire™ digital interface.
Figure 2.1 ZSSC3015 Block Diagram
0.1 µF
JFET1
(Optional if supply is 2.7 to 5.5 V)
SD
VDD (2.7 to 5.5 V)
Vgate
5.5 V to 30 V
VSUPPLY
Sensor
Diagnostics
PTAT
Temperature
Reference
Voltage
Reference
RBicdLite
ZSSC3015
12-Bit
DAC
Optional
Ext. Diode
for Temp
VBP
VBN
Ext Temp
(Optional) Bsink
INMUX
PREAMP
A
D
14-Bit ADC
_
+
OUTBUF1
SigTM
0 V to 1 V
Ratiometric
Rail-to-Rail
OWI/ZACwireTM
Power Save
POR/Oscillator
EEPROM
with Charge
Pump
Digital
Core
ZACwireTM
Interface
Power Lost
Diagnostic
Analog Block
Digital Block
VSS
© 2016 Integrated Device Technology, Inc.
48
January 20, 2016
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ZSSC3015.PDF ] | |
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