TLC1549C, TLC1549I, TLC1549M
10-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH SERIAL CONTROL
SLAS059C – DECEMBER 1992 – REVISED MARCH 1995
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage range, V
CC
(see Note 1): TLC1549C, TLC1549I . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 6.5 V
TLC1549M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 6 V
Input voltage range, V
I
(any input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to V
CC
+ 0.3 V
Output voltage range, V
O
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to V
CC
+ 0.3 V
Positive reference voltage, V
ref+
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
CC
+ 0.1 V
Negative reference voltage, V
ref –
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.1 V
Peak input current (any input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
20 mA
Peak total input current (all inputs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
30 mA
Operating free-air temperature range, T
A
: TLC1549C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
TLC1549I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 85°C
TLC1549M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C
Storage temperature range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from the case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to ground with REF – and GND wired together (unless otherwise noted).
recommended operating conditions
MIN
Supply voltage, VCC
Positive reference voltage, Vref + (see Note 2)
Negative reference voltage, Vref – (see Note 2)
Differential reference voltage, Vref + – Vref – (see Note 2)
Analog input voltage (see Note 2)
High-level control input voltage, VIH
Low-level control input voltage, VIL
Clock frequency at I/O CLOCK (see Note 3)
Setup time, CS low before first I/O CLOCK↑, tsu(CS) (see Note 4)
Hold time, CS low after last I/O CLOCK↓, th(CS)
Pulse duration, I/O CLOCK high, twH(I/O)
Pulse duration, I/O CLOCK low, twL(I/O)
Transition time, I/O CLOCK, tt(I/O) (see Note 5 and Figure 5)
Transition time, CS, tt(CS)
TLC1549C
Operating free-air temperature, TA
TLC1549I
TLC1549M
0
– 40
– 55
VCC = 4.5 V to 5.5 V
VCC = 4.5 V to 5.5 V
2.5
0
2
0.8
0
1.425
0
190
190
1
10
70
85
125
°C
2.1
4.5
NOM
5
VCC
0
VCC
VCC + 0.2
VCC
MAX
5.5
UNIT
V
V
V
V
V
V
V
MHz
µs
ns
ns
ns
µs
µs
NOTES: 2. Analog input voltages greater than that applied to REF + convert as all ones (1111111111), while input voltages less than that applied
to REF – convert as all zeros (0000000000). The TLC1549 is functional with reference voltages down to 1 V (Vref + – Vref –); however,
the electrical specifications are no longer applicable.
3. For 11- to 16-bit transfers, after the tenth I/O CLOCK falling edge (≤ 2 V) at least 1 I/O CLOCK rising edge (≥ 2 V) must occur within
9.5
µs.
4. To minimize errors caused by noise at CS, the internal circuitry waits for a setup time plus two falling edges of the internal system
clock after CS↓ before responding to the I/O CLOCK. No attempt should be made to clock out the data until the minimum CS setup
time has elapsed.
5. This is the time required for the clock input signal to fall from VIHmin to VILmax or to rise from VILmax to VIHmin. In the vicinity of
normal room temperature, the devices function with input clock transition time as slow as 1
µs
for remote data-acquisition
applications where the sensor and the A / D converter are placed several feet away from the controlling microprocessor.
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
7
TI [ TEXAS INSTRUMENTS ]
