TLV1548-EP Datasheet, PDF (1/35 Pages) Texas Instruments – LOW-VOLTAGE 10-BIT ANALOG-TO-DIGITAL CONVERTER WITH SERIAL CONTROL AND 8 ANALOG INPUTS

TLV1548ĆEP
LOWĆVOLTAGE 10ĆBIT ANALOGĆTOĆDIGITAL CONVERTER
WITH SERIAL CONTROL AND 8 ANALOG INPUTS
SGLS171A − JUNE 2003 − REVISED DECEMBER 2003
D Controlled Baseline
− One Assembly Site, One Test Site, One
Fabrication Site
D Extended Temperature Performance of
−40°C to 125°C
D Enhanced Diminishing Manufacturing
Sources (DMS) Support
D Enhanced Product-Change Notification
D Qualification Pedigree^†
D Conversion Time ≤ 10 µs
D 10-Bit-Resolution ADC
D Programmable Power-Down
Mode . . . 1 µA
D Wide Range Single-Supply Operation of
2.7 V dc to 5.5 V dc
D Analog Input Range of 0 V to V_CC
D Built-in Analog Multiplexer with 8 Analog
Input Channels
† _{Component qualification in accordance with JEDEC and industry}
standards to ensure reliable operation over an extended
temperature range. This includes, but is not limited to, Highly
Accelerated Stress Test (HAST) or biased 85/85, temperature
cycle, autoclave or unbiased HAST, electromigration, bond
intermetallic life, and mold compound life. Such qualification
testing should not be viewed as justifying use of this component
beyond specified performance and environmental limits.
D TMS320 DSP and Microprocessor SPI and
QSPI Compatible Serial Interfaces
D End-of-Conversion (EOC) Flag
D Inherent Sample-and-Hold Function
D Built-In Self-Test Modes
D Programmable Power and Conversion Rate
D Asynchronous Start of Conversion for
Extended Sampling
D Hardware I/O Clock Phase Adjust Input
A0
A1
A2
A3
A4
A5
A6
A7
CSTART
GND
DB PACKAGE
(TOP VIEW)
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
V_CC
EOC
I/O CLK
DATA IN
DATA OUT
CS
REF+
REF−
FS
INV CLK
description
The TLV1548 is a CMOS 10-bit switched-capacitor successive-approximation (SAR) analog-to-digital (A/D)
converter. The device has a chip select (CS), input-output clock (I/O CLK), data input (DATA IN) and serial data
output (DATA OUT) that provides a direct 4-wire synchronous serial peripheral interface (SPI, QSPI) port
of a host microprocessor. When interfacing with a TMS320 DSP, an additional frame sync signal (FS) indicates
the start of a serial data frame. The device allows high-speed data transfers from the host. The INV CLK input
provides further timing flexibility for the serial interface.
In addition to a high-speed converter and versatile control capability, the device has an on-chip 11-channel
multiplexer that can select any one of eight analog inputs or any one of three internal self-test voltages. The
sample-and-hold function is automatic except for the extended sampling cycle, where the sampling cycle is
started by the falling edge of asynchronous CSTART. At the end of the A/D conversion, the end-of-conversion
(EOC) output goes high to indicate that the conversion is complete. The TLV1548 is designed to operate with
a wide range of supply voltages with very low power consumption. The power saving feature is further enhanced
with a software-programmed power-down mode and conversion rate. The converter incorporated in the device
features differential high-impedance reference inputs that facilitate ratiometric conversion, scaling, and
isolation of analog circuitry from logic and supply noise. A switched-capacitor design allows low-error
conversion over the full operating temperature range.
The TLV1548 has eight analog input channels. The TLV1548Q is characterized for operation from −40°C to
125°C.
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.
SPI and QSPI are registered trademarks of Motorola, Inc.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright  2003 Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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