TLC32071 Datasheet, PDF (4/15 Pages) Texas Instruments – HIGH-SPEED 8-BIT A/D AND D/A CONVERTER WITH 8-CHANNEL MULTIPLEXER

TLC32071
HIGHĆSPEED 8ĆBIT A/D AND D/A CONVERTER
WITH 8ĆCHANNEL MULTIPLEXER
SLAS051−D3973, DECEMBER 1991
Terminal Functions
PIN
NAME
ANAOUT
ANLG COM
ANLG GND
A0
A1
A2
A3
A4
A5
A6
A7
CSAN
CSCNTRL
DEN
DGTL GND
D7−D0
RESET
NO.
1
25
17
19
21
26
22
23
24
18
20
3
4
5
16
7−1
4
2
REF
28
VDD
15
VCC
27
WE
6
I/O
DESCRIPTION
O Analog output. The DAC output with selectable ranges.
I Analog common. Input for reference voltage for inverting analog inputs.
Analog ground. Ground connection associated with ADC, DAC, and other analog circuits.
I
I ^{Inverting analog input with range programmable to 8, 4, or 2 V. This input uses ANLG COM as a signal ground.}
I
I
I ^{Inverting analog Input. This input uses ANLG COM as a signal ground.}
I
I Auxiliary noninverting analog input with input range of 0.5 to 4.5 V. This input uses the internal reference VR2.5
I as a signal ground.
I Chip select for writing to the D/A converter and reading the results of an A/D conversion.
I Chip select for the control register, which selects DAC and ADC ranges and the analog input channel.
I Read strobe for the A/D converter output. Output buffers are enabled when this signal is held low.
Digital ground. Ground connection associated with digital data-bus signals and other digital circuits.
I/O Bidirectional data bus. This bus is used for writing conversion data to the DAC, writing data to the range/ADC
MUX control register or to the REF MUX control register, and for reading the ADC conversion result.
I Reset. This strobe, when low, clears the range/ADC MUX control register, the REF MUX control register, and
the DAC input register. CSCNTRL and CSAN should be held high during a reset operation.
O 2.5-V reference output. The signal routed to this pin is determined by the contents of an internal register (see
CSCNTRL data word description). The internally generated 2.5-V reference may be selected for use in biasing
inputs A6 and A7.
5-V (digital) supply
10-V (analog) supply
I Write enable. This input is a write strobe for the control registers and the DAC input register. Data is latched
on the rising edge of this signal.
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