EVAL MODULE FOR PGA309

PGA309EVM-USB

Manufacturer Part NumberPGA309EVM-USB
DescriptionEVAL MODULE FOR PGA309
ManufacturerTexas Instruments
Series-
PGA309EVM-USB datasheets
 


Specifications of PGA309EVM-USB

Main PurposeInterface, Sensor Signal ConditionerEmbeddedNo
Utilized Ic / PartPGA309Description/functionAudio Amplifiers
Operating Supply Voltage2.7 V to 5.5 VProductAudio Modules
Primary Attributes-Secondary Attributes-
Lead Free Status / RoHS StatusLead free / RoHS CompliantSecondary Attributes-
Primary Attributes-For Use With/related ProductsPGA309
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FEATURES
1
Complete Bridge Sensor Conditioner
2
Voltage Output: Ratiometric or Absolute
Digital Cal: No Potentiometers/Sensor Trims
Sensor Error Compensation
– Span, Offset, and Temperature Drifts
Low Error, Time-Stable
Sensor Linearization Circuitry
Temperature Sense: Internal or External
Calibration Lookup Table Logic
– Uses External EEPROM (SOT23-5)
Over/Under-Scale Limiting
Sensor Fault Detection
+2.7V TO +5.5V Operation
–40°C to +125°C Operation
Small TSSOP-16 Package
APPLICATIONS
Bridge Sensors
Remote 4-20mA Transmitters
Strain, Load, and Weigh Scales
Automotive Sensors
EVALUATION TOOLS
Hardware Designer’s Kit (PGA309EVM)
– Temperature Eval of PGA309 + Sensor
– Full Programming of PGA309
– Sensor Compensation Analysis Tool
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Voltage Output
Programmable Sensor Conditioner
Check for Samples:
PGA309
DESCRIPTION
The PGA309 is a programmable analog signal
conditioner designed for bridge sensors. The analog
signal path amplifies the sensor signal and provides
digital calibration for zero, span, zero drift, span drift,
and sensor linearization errors with applied stress
(pressure, strain, etc.). The calibration is done via a
One-Wire digital serial interface or through a
Two-Wire
calibration
nonvolatile memory (typically SOT23-5) to eliminate
manual trimming and achieve long-term stability.
The all-analog signal path contains a 2x2 input
multiplexer
instrumentation amplifier, linearization circuit, voltage
reference, internal oscillator, control logic, and an
output
compensates for sensor dc offsets.
The core of the PGA309 is the precision, low-drift, no
1/f noise Front-End PGA (Programmable Gain
Amplifier). The overall gain of the Front-End PGA +
Output Amplifier can be adjusted from 2.7V/V to
1152V/V. The polarity of the inputs can be switched
through the input mux to accommodate sensors with
unknown polarity output. The Fault Monitor circuit
detects and signals sensor burnout, overload, and
system fault conditions.
For detailed application information, see the
User's Guide (SBOU024)
www.ti.com.
P
psi
0
50
+125 C
°
T
-
40 C
°
SBOS292C – DECEMBER 2003 – REVISED JANUARY 2011
industry-standard
connection.
parameters
are
stored
in
(mux),
auto-zero
programmable-gain
amplifier.
Programmable
level
available for download at
V
S
Ref
Nonlinear
Linearization
V
EXC
Circuit
PGA309
Bridge
Transducer
Lin DAC
Analog Sensor Linearization
Fault
Over/Under
Auto- Zero
Monitor
Scale Limiter
PGA
Analog Signal Conditioning
Digital
Int Temp
Temperature
Compensation
Temp
Control Register
Ext Temp
ADC
Interface Circuitry
Ext Temp
Copyright © 2003–2011, Texas Instruments Incorporated
PGA309
The
external
shifting
PGA309
Linear
V
OUT
Digital Cal
EEPROM
(SOT23-5)

PGA309EVM-USB Summary of contents

  • Page 1

    ... Strain, Load, and Weigh Scales • Automotive Sensors EVALUATION TOOLS • Hardware Designer’s Kit (PGA309EVM) – Temperature Eval of PGA309 + Sensor – Full Programming of PGA309 – Sensor Compensation Analysis Tool 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet ...

  • Page 2

    ... PGA309 SBOS292C – DECEMBER 2003 – REVISED JANUARY 2011 This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications ...

  • Page 3

    ... Linear input range is the allowed min/max voltage on the V The allowed common-mode and differential voltage depends on gain and offset settings. Refer to the information. Copyright © 2003–2011, Texas Instruments Incorporated SBOS292C – DECEMBER 2003 – REVISED JANUARY 2011 = –40°C to +125°C. ...

  • Page 4

    ... Copyright © 2003–2011, Texas Instruments Incorporated REF UNIT V/V mV/V LSB LSB mV mV/° MHz deg Ω mV mV/°C mV mV/° ...

  • Page 5

    ... This minimum EXC reference selector circuit uses V − 100mV and V EXC configuration ensures accurate fault monitoring in conditions where V amplifier relative Copyright © 2003–2011, Texas Instruments Incorporated SBOS292C – DECEMBER 2003 – REVISED JANUARY 2011 = –40°C to +125° SUPPLY ANALOG SD ...

  • Page 6

    ... Bits + Sign 15 Bits + Sign 0.01 2.5 1.25 0.7 0.3 1.5 1.0 0.7 0.6 −0.2 2 ppm/°C 80 100 85 5 −1.2 SA Copyright © 2003–2011, Texas Instruments Incorporated REF UNIT mV/V mV/V mV/V mV/V % LSB ppm MΩ MΩ MΩ MΩ MΩ mV/°C mV/°C mV/° ...

  • Page 7

    ... Lookup table allows multislope compensation over temperature. Lookup table has access to 17 calibration points consisting of three adjustment values (Tx, Temperature, ZMx, Zero DAC, GMx, Gain DAC) that are stored in 16-bit data format (17x3x16 = Lookup table size). Copyright © 2003–2011, Texas Instruments Incorporated SBOS292C – DECEMBER 2003 – REVISED JANUARY 2011 = –40°C to +125°C. ...

  • Page 8

    ... V OUT external protection is used. OUT in normal mode. D for a three-lead (V OUT , the internal/external V GNDA EXC ) that can be connected to TEMP TEMP Copyright © 2003–2011, Texas Instruments Incorporated Product Folder Link(s): PGA309 www.ti.com . Should be same as GND . the OUT . SA . Should be same as GND ...

  • Page 9

    ... REF EXT 2.5V REF 0 PSRR at V OUT -10 10 100 1k 10k Frequency (Hz) Figure 5. Copyright © 2003–2011, Texas Instruments Incorporated SBOS292C – DECEMBER 2003 – REVISED JANUARY 2011 TYPICAL CHARACTERISTICS = SUPPLY ANALOG SD SUPPLY DIGITAL = REF /REF = +5V, unless otherwise noted. IN OUT 1.0 0 ...

  • Page 10

    ... Reg 6 = 0433h V = 2.048V Internal V = 2.5V Internal REF REF (Temp ADC Internal) 15-Bit + Sign 15-Bit + Sign Reg 6 = 0403h Internal REF 15-Bit + Sign 100 Input Signal (% REF Figure 10. V NOISE OUT G = 1152 Coarse Offset = 59mV - 1s/div Figure 12. Copyright © 2003–2011, Texas Instruments Incorporated ...

  • Page 11

    ... Frequency (Hz) Figure 13. LARGE-SIGNAL STEP RESPONSE Time (10 s/div) m Figure 15. SMALL-SIGNAL STEP RESPONSE Time (10 s/div) m Figure 17. Copyright © 2003–2011, Texas Instruments Incorporated SBOS292C – DECEMBER 2003 – REVISED JANUARY 2011 , SUPPLY ANALOG SD SUPPLY DIGITAL SA 1 Coarse Offset Adjust = 0mV CLK_CFG = 00 (default) ...

  • Page 12

    ... Product Folder Link(s): PGA309 www.ti.com must equal V ), GND = GND = 0, and OVERVOLTAGE RECOVERY V OUT V IN Time (100 s/div) m Figure 20. ZERO DAC TYPICAL ERROR vs CODE Unit 2 Unit 1 20000 30000 40000 50000 60000 70000 Code (LSB) Figure 22. 70000 Copyright © 2003–2011, Texas Instruments Incorporated ...

  • Page 13

    ... Temperature Compensation Lookup Table driven by the Temperature Copyright © 2003–2011, Texas Instruments Incorporated SBOS292C – DECEMBER 2003 – REVISED JANUARY 2011 FUNCTIONAL DESCRIPTION Converter (Temp ADC). In order to compensate for second-order and higher drift nonlinearity, the span drift can be fitted to piecewise linear curves during calibration with the coefficients stored in an external nonvolatile EEPROM lookup table ...

  • Page 14

    ... Voltage Reference SDA Two-Wire EEPROM SCL Circuitry (SOT23-5) PRG V OUT Over-/Under- Scale Limits Fault Out V OUT FILT R ISO V 100W OUT Output Amp C 10nF V Int/Ext 100W V FB Output Coarse Gain Adjust 150pF V SJ Copyright © 2003–2011, Texas Instruments Incorporated L ...

  • Page 15

    ... DAC adjustments with measured temperature, and also contains its own checksum (Checksum2). The PGA309 lookup logic contains a linear interpolation Copyright © 2003–2011, Texas Instruments Incorporated SBOS292C – DECEMBER 2003 – REVISED JANUARY 2011 algorithm for accurate DAC adjustments between stored temperature indexes. This approach allows for ...

  • Page 16

    ... IN INN V : The coarse offset DAC output Coarse_Offset voltage. GI: Input stage gain Zero DAC output voltage. Zero_DAC GD: Gain DAC. GO: Output stage gain. Copyright © 2003–2011, Texas Instruments Incorporated Product Folder Link(s): PGA309 www.ti.com a One-Wire, UART-compatible pin in true OUT . This OUT ( ] ...

  • Page 17

    ... REF V INP V IN2 IN1 4 Input Mux TEST Test Logic GND GND A D Copyright © 2003–2011, Texas Instruments Incorporated SBOS292C – DECEMBER 2003 – REVISED JANUARY 2011 REF /REF IN OUT 16 EXC Gain Adjust V x0.166 FB x0.83 V (2.5V or 4.096V) x0.124 V REF x0.52 V REF ...

  • Page 18

    ... Changes from Revision B (January, 2005) to Revision C • Updated document format to current standards ................................................................................................................... • Deleted lead temperature specification from • Added PGA Transfer Function section ............................................................................................................................... 18 Submit Documentation Feedback REVISION HISTORY Absolute Maximum Ratings table .................................................................. Copyright © 2003–2011, Texas Instruments Incorporated Product Folder Link(s): PGA309 www.ti.com Page ...

  • Page 19

    PACKAGING INFORMATION Orderable Device (1) Package Type Package Status PGA309AIPWR ACTIVE TSSOP PGA309AIPWRG4 ACTIVE TSSOP PGA309AIPWT ACTIVE TSSOP PGA309AIPWTG4 ACTIVE TSSOP (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI ...

  • Page 20

    TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing PGA309AIPWR TSSOP PW PGA309AIPWT TSSOP PW PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 16 2500 330.0 12.4 6.9 16 ...

  • Page 21

    Device Package Type PGA309AIPWR TSSOP PGA309AIPWT TSSOP PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm 2500 PW 16 250 Pack Materials-Page 2 19-Aug-2010 Width (mm) Height (mm) 346.0 346.0 29.0 190.5 212.7 ...

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    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...