Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - system monitor Dual voltage detector WSON 16

Successive

Approximation

ADC

Control

Logic

TDI TDO TCK TMS TRST

IEEE 1149.1

TAP (JTAG)

REF

SCANSTA476

www.ti.com

SNLS171G –JANUARY 2005–REVISED APRIL 2013

SCANSTA476 Eight Input IEEE 1149.1 Analog Voltage Monitor

Check for Samples: SCANSTA476

FEATURES

DESCRIPTION

The SCANSTA476 is a low power, Analog Voltage

• Eight Selectable Analog Input Channels

Monitor used for sampling or monitoring up to 8

• Analog Full-Scale Input Range 0V to V

analog/mixed-signal input channels. Analog Voltage

• Typical Accuracy of 2 mV at Maximum V

Monitors are valuable during product development,

environmental test, production, and field service for

• Very Low Power Operation

verifying and monitoring power supply and reference

• Small Package Footprint in 16-Lead, 5 x 5 x 0.8

voltages. In a supervisory role, the 'STA476 is useful

mm WSON

for card or system-level health monitoring and

• Single +2.7V to +5.5V Supply Operation

prognostics applications.

• IEEE 1149.1 (JTAG) Compliant Interface

Instead of requiring an external microcontroller with a

GPIO interface, the 'STA476 features a common

APPLICATIONS

IEEE 1149.1 (JTAG) interface to select the analog

input, initiate a measurement, and access the results

• Measurement of Point Voltages

- further extending the capabilities of an existing

• Real-time Signal Monitoring

JTAG infrastructure.

• System Health Monitoring and Prognostics

The SCANSTA476 uses the V

REF

input as a

• Debug, Environmental Test, Production Test,

reference. This enables the SCANSTA476 to operate

Field Service

with a full-scale input range of 0 to V

, which can

range from +2.7V to +5.5V.

• Supplement In-Circuit Tester (ICT) Access

• Vital in Servers, Computing,

The SCANSTA476 is packaged in a 16-lead non-

Telecommunication and Industrial Equipment

pullback WSON package that provides an extremely

small footprint for applications where space is a

• Essential in Medical, Data Storage, and

critical consideration. This product operates over the

Networking Equipment

industrial temperature range of −40°C to +85°C.

Block Diagram

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.

2All trademarks are the property of their respective owners.

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.

Summary of content (12 pages)

PAGE 1
SCANSTA476 www.ti.com SNLS171G – JANUARY 2005 – REVISED APRIL 2013 SCANSTA476 Eight Input IEEE 1149.1 Analog Voltage Monitor Check for Samples: SCANSTA476 FEATURES DESCRIPTION • • • • • The SCANSTA476 is a low power, Analog Voltage Monitor used for sampling or monitoring up to 8 analog/mixed-signal input channels. Analog Voltage Monitors are valuable during product development, environmental test, production, and field service for verifying and monitoring power supply and reference voltages.
PAGE 2
SCANSTA476 SNLS171G – JANUARY 2005 – REVISED APRIL 2013 www.ti.com Connection Diagram VDD 1 16 A0 VREF 2 15 A1 VDD 3 14 A2 TRST 4 13 A3 TDO 5 12 A4 TDI 6 11 A5 TMS 7 10 A6 TCK 8 9 A7 DAP (GND) Figure 1. DAP = GND (Top View) Pin Descriptions Pin No. Symbol Description ANALOG I/O 16 A0 Analog input 0. This signal can range from 0V to VREF. 15 A1 Analog input 1. This signal can range from 0V to VREF. 14 A2 Analog input 2. This signal can range from 0V to VREF.
PAGE 3
SCANSTA476 www.ti.com SNLS171G – JANUARY 2005 – REVISED APRIL 2013 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) (2) −0.3V to +6.5V Supply Voltage VDD Voltage on Any Analog Pin to GND −0.3V to VDD+0.3V Voltage on Any Digital Pin to GND -0.3V to VDD+0.
PAGE 4
SCANSTA476 SNLS171G – JANUARY 2005 – REVISED APRIL 2013 www.ti.com SCANSTA476 Electrical Characteristics (continued) The following specifications apply for VDD = +2.7V to 5.5V, fTCK = 20 MHz, unless otherwise noted. Symbol IILR Parameter Conditions Input Current Typical TRST, TDI, TMS only Limits Units -300 µA (max) DIGITAL OUTPUT CHARACTERISTICS (TDO) IOH = -100 µA, 2.7V ≤ VDD ≤ 5.
PAGE 5
SCANSTA476 www.ti.com SNLS171G – JANUARY 2005 – REVISED APRIL 2013 Timing Diagrams JTAG Reset TAP State TLR (Test-Logic-Reset) JTAG Instruction Shift RTI SEL DR SEL IR CAP IR (IDLE) EX1 IR SHIFT IR UPD IR RTI (Run-Test/Idle) TCK TRST TMS 8-bit instruction register op-code (40h to 47h) TDI x x x x 0 0 1 0 0 1 8-bit instruction register capture value (81h) TDO 1 0 0 0 0 0 LSB MSB Op-codes 40h to 47h select pins A0 to A7 respectively.
PAGE 6
SCANSTA476 SNLS171G – JANUARY 2005 – REVISED APRIL 2013 www.ti.com (IDLE) TAP State RTI JTAG Data Shift SEL CAP DR DR (IDLE) EX1 UPD DR DR SHIFT DR RTI TCK TRST TMS (GRQ¶W FDUH) TDI TDO 0 0 0 0 D11 D10 D9 D8 D7 D6 D5 D4 MSB D3 D2 D1 D0 LSB D11 through D0 correspond to the 12-bit sample from the ADC Core. Note that Data shifts can be run back-to-back for continous sampling of a single channel, or can be interleaved with instruction shifts for rippling through all 8 channels.
PAGE 7
SCANSTA476 www.ti.com SNLS171G – JANUARY 2005 – REVISED APRIL 2013 REVISION HISTORY Changes from Revision F (April 2013) to Revision G • Page Changed layout of National Data Sheet to TI format ............................................................................................................
PAGE 8
PACKAGE OPTION ADDENDUM www.ti.com 7-Oct-2013 PACKAGING INFORMATION Orderable Device Status (1) SCANSTA476TSD/NOPB ACTIVE Package Type Package Pins Package Drawing Qty WSON NHQ 16 1000 Eco Plan Lead/Ball Finish (2) Green (RoHS & no Sb/Br) MSL Peak Temp Op Temp (°C) Device Marking (3) CU SN Level-3-260C-168 HR (4/5) -40 to 85 STA476T (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
PAGE 9
PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device SCANSTA476TSD/NOPB Package Package Pins Type Drawing WSON NHQ 16 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 1000 178.0 12.4 Pack Materials-Page 1 5.3 B0 (mm) K0 (mm) P1 (mm) 5.3 1.3 8.0 W Pin1 (mm) Quadrant 12.
PAGE 10
PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SCANSTA476TSD/NOPB WSON NHQ 16 1000 213.0 191.0 55.
PAGE 11
MECHANICAL DATA NHQ0016A SDA16A (Rev A) www.ti.
PAGE 12
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