TLV5592
2-BIT ANALOG-TO-DIGITAL CONVERTER
FOR FLEX PAGER CHIPSET
SLAS145A – JUNE1996 – REVISED DECEMBER 1997
Supports FLEX Protocol Messaging Systems
With The TLV559X FLEX Decoder
Four Modes of Operation:
– Fast Track
– Slow Track
– Hold
– Standby
3-Pole Butterworth Low-Pass Selectable
Dual-Bandwidth Audio Filter
– BW 1 = 1 kHz ±5% (– 3 dB)
– BW 2 = 2 kHz ±5% (– 3 dB)
1.8-V to 2.5-V Single Power Supply
Operation
Both Peak and Valley Detectors Available
2-Bit Analog-to-Digital Converter
applications
Operating Temperature Range –20°C to 65°C
FLEX Protocol Numeric and
Alphanumeric Messaging Systems
One-Way or Two-Way
description
The Texas Instruments (TI ) TLV5592 analog-to-
digital converter (ADC) is a system level solution
to interface a 4-level baseband audio signal to a
digital decoder. The TLV5592 is a direct interface
to the TLV559X FLEX decoder. Designed primari-
ly for messaging applications, the TLV5592 incor-
porates signal conditioning, both peak and valley
detection along with analog-to-digital conversion.
A selectable third-order Butterworth filter with
cutoff frequencies of 1 kHz and 2 kHz is included.
D PACKAGE
(TOP VIEW)
DV
AV
CLK
1
2
3
4
5
6
7
14
13
12
11
10
9
DD
DD
TEST
SIG
DC OFFSET
MID
TRACKINH
EXTS0
EXTS1
CON2
The peak and valley detectors are implemented
withauniquedesignthatdoesnotrequireexternal
capacitors. Two 8-bit digital-to-analog converters
(DACs) are used in a feedback loop to
automatically adjust to the peak and valley levels.
GND
BW
CON1
8
TheDACoutputsareusedtosetV
andV
for
ref+
ref–
the 2-bit ADC. Modes of operation include fast
track, slow track, hold, and standby. The standby
mode maximizes battery life. The TLV5592
operates on a single power supply from 1.8 V to
2.5 V.
AVAILABLE OPTIONS
PACKAGE
T
A
SMALL OUTLINE
(D)
–25°C to 65°C
TLV5592ED
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.
FLEX is a trademark of Motorola Inc.
TI is a trademark of Texas Instruments Incorporated.
Copyright 1997, Texas Instruments Incorporated
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.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265