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SLAS345 − DECEMBER 2001
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ꢔꢍꢎ ꢐ ꢕꢁ ꢕꢖ ꢕꢁ ꢊꢗ ꢈꢀꢊ ꢈꢘꢐ ꢗ ꢐꢀꢕꢁ ꢂꢊ ꢖꢉꢍ ꢎꢀ ꢍꢎꢔ ꢋ ꢐꢀ ꢙ ꢕꢚꢀꢊ ꢈꢌꢊ ꢋ ꢍꢎ ꢘꢊ ꢋ ꢖ
FEATURES
APPLICATIONS
D
D
D
D
D
D
D
D
200-KSPS Sampling Rate
Built-In Conversion Clock
D
D
D
D
ATE System
Industrial Process Control
Measurement
INL: 1 LSB Max
DNL: 1 LSB Max
Motor Control
SINAD = 81.5 dB, SFDR = 95 dB
THD = 94 dB at 15 kHz f , 200 KSPS
DESCRIPTION
in
SPI/DSP-Compatible Serial Interfaces With
SCLK Input up to 15 MHz
The TLC3541 and TLC3545 are a family of high
performance, 14-bit, low power, miniature CMOS
analog-to-digital converters (ADCs). These devices
operate from a single 5-V supply. Devices are available
with single, dual, or single pseudo-differential inputs. All
of these devices have a chip select (CS), serial clock
(SCLK), and serial data output (SDO) that provides a
direct 3-wire interface to the serial port of most popular
host microprocessors (SPI interface). When interfaced
with a DSP, a frame sync signal (FS) is used to indicate
the start of a serial data frame on either pin 1 (CS) or pin
7 (FS) for the TLC3541. The TLC3545 ADC connects
to the DSP via pin 1 only (CS).
Single 5-V Supply
Rail-to-Rail Analog Input With 500 kHz BW
Two Input Options Available:
− TLC3541 − Single Channel Input
− TLC3545 − Single Channel,
Pseudo-Differential Input
D
D
(TLC3541) Optimized DSP Interface −
Requires FS Input Only
Low Power With Auto-Power Down
− Operating Current: 3.5 mA
− Auto-Powerdown Current: 5 µA
Pin Compatible 12-/14-/16-Bit Family in 8-Pin
SOIC and MSOP Packages
The TLC3541 and TLC3545 are designed to operate
with low power consumption. The power saving feature
is further enhanced with an auto-power down mode.
This product family features a high-speed serial link to
modern host processors with an external SCLK up to
15 MHz. Both families use a built-in oscillator as the
conversion clock, providing a 2.67 µs maximum
conversion time.
D
TLC3541
D OR DGK Package
(TOP VIEW)
TLC3545
D OR DGK Package
(TOP VIEW)
CS
REF
GND
AIN
1
2
3
4
8
7
6
5
SDO
FS
CS
REF
1
2
3
4
8
7
6
5
SDO
SCLK
V
GND
DD
V
DD
SCLK
AIN(+)
AIN(−)
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.
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Copyright 2001, Texas Instruments Incorporated
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ꢢ ꢦ ꢣ ꢢꢛ ꢜꢰ ꢞꢝ ꢡ ꢩꢩ ꢧꢡ ꢟ ꢡ ꢠ ꢦ ꢢ ꢦ ꢟ ꢣ ꢫ
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