TLV2544 Datasheet, PDF (1/39 Pages) Texas Instruments – 2.7 V TO 5.5 V, 12-BIT, 200 KSPS, 4/8 CHANNEL, LOW POWER, SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTO POWER DOWN

TLV2544, TLV2548
2.7 V TO 5.5 V, 12-BIT, 200 KSPS, 4/8 CHANNEL, LOW POWER,
SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTO POWER DOWN
SLAS198A –FEBRUARY 1999– REVISED AUGUST 1999
D Maximum Throughput 200 KSPS
D Built-In Reference, Conversion Clock and
8× FIFO
D Differential/Integral Nonlinearity Error:
±1 LSB
D Signal-to-Noise and Distortion Ratio:
69 dB, f_i = 12 kHz
D Spurious Free Dynamic Range: 75 dB,
f_i = 12 kHz
D SPI/DSP-Compatible Serial Interfaces With
SCLK up to 20 MHz
D Single Wide Range Supply 2.7 Vdc to
5.5 Vdc
D Analog Input Range 0 V to Supply Voltage
with 500 kHz BW
D Hardware Controlled and Programmable
Sampling Period
D Low Operating Current (1 mA at 2.7 V,
1.2 mA at 5.5 V External Ref,
1.6 mA at 2.7 V,
2.1 mA at 5.5 V, Internal Ref)
D Power Down: Software/Hardware
Power-Down Mode (1 µA Max, Ext Ref),
Auto Power-Down Mode (1 µA, Ext Ref)
D Programmable Auto-Channel Sweep
DW OR PW PACKAGE
(TOP VIEW)
SDO 1
SDI 2
SCLK 3
EOC/(INT) 4
V_CC 5
A0 6
A1 7
A2 8
A3 9
A4 ¹⁰
20 CS
19 REFP
18 REFM
17 FS
16 PWDN
15 GND
14 CSTART
13 A7
12 A6
11 _A5
D OR PW PACKAGE
(TOP VIEW)
SDO 1
SDI 2
SCLK 3
EOC/(INT) 4
V_CC 5
A0 6
A1 7
A2 8
16 CS
15 REFP
14 REFM
13 FS
12 PWDN
11 GND
10 CSTART
9 A3
description
The TLV2548 and TLV2544 are a family of high performance, 12-bit low power, 3.6 µs, CMOS analog-to-digital
converters (ADC) which operate from a single 2.7 V to 5.5 V power supply. These devices have three digital
inputs and a 3-state output [chip select (CS), serial input-output clock (SCLK), serial data input (SDI) and serial
data output (SDO)] that provide a direct 4-wire interface to the serial port of most popular host microprocessors
(SPI interface). When interfaced with a DSP, a frame sync (FS) signal is used to indicate the start of a serial data
frame.
In addition to a high-speed A/D converter and versatile control capability, these devices have an on-chip analog
multiplexer that can select any analog inputs or one of three internal self-test voltages. The sample-and-hold
function is automatically started after the fourth SCLK edge (normal sampling) or can be controlled by a special
pin, CSTART, to extend the sampling period (extended sampling). The normal sampling period can also be
programmed as short (12 SCLKs) or as long (24 SCLKs) to accommodate faster SCLK operation popular
among high-performance signal processors. The TLV2548 and TLV2544 are designed to operate with very low
power consumption. The power-saving feature is further enhanced with software/hardware/auto power down
modes and programmable conversion speeds. The conversion clock (OSC) and reference are built-in. The
converter can use the external SCLK as the source of the conversion clock to achieve higher (up to 3.6 µs when
a 20 MHz SCLK is used) conversion speed. Two different internal reference voltages are available. An optional
external reference can also be used to achieve maximum flexibility.
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.
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.
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Copyright © 1999, Texas Instruments Incorporated
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