12-BIT
µ
P-COMPATIBLE
ANALOG-TO-DIGITAL CONVERTERS
TC7109
TC7109A
ABSOLUTE MAXIMUM RATINGS*
Positive Supply Voltage (GND to V
+
) ..................... +6.2V
Negative Supply voltage (GND to V
–
) ....................... –9V
Analog Input Voltage (Low to High) (Note 1) ....... V
+
to V
–
Reference Input Voltage (Low to High (Note 1) .. V
+
to V
–
Digital Input Voltage (Pins 2–27) (Note 2) ..... GND –0.3V
Power Dissipation, T
A
< 70°C, (Note 3)
CerDIP ............................................................. 2.29W
Plastic DIP ....................................................... 1.23W
PLCC ............................................................... 1.23W
PQFP ............................................................... 1.00W
Operating Temperature Range
Plastic Package (C) ............................... 0°C to +70°C
Ceramic Package (I) ....................... – 25°C to +85°C
(M) ................... – 55°C to +125°C
Storage Temperature Range ............... – 65°C to +150°C
Lead Temperature (Soldering, 10 sec) ................. +300°C
*Static-sensitive device. Unused devices must be stored in conductive
material. Protect devices from static discharge and static fields. Stresses
above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. These are stress ratings only and functional
operation of the device at these or any other conditions above those
indicated in the operational sections of the specifications is not implied.
Exposure to Absolute Maximum Rating Conditions for extended periods
may affect device reliability.
NOTES:
1. Input voltages may exceed supply voltages if input current is
limited to
±100 µA.
2. Connecting any digital inputs or outputs to voltages greater
than V
+
or less than GND may cause destructive device latch-
up. Therefore, it is recommended that inputs from sources
other than the same power supply should not be applied to
the TC7109A before its power supply is established. In
multiple supply systems, the supply to the device should be
activated first.
3. This limit refers to that of the package and will not occur during
normal operation.
ELECTRICAL CHARACTERISTICS:
All parameters with V
+
= +5V, V
–
= –5V, GND = 0V, T
A
= +25°C,
unless otherwise indicated.
Symbol
Analog
Overload Recovery Time
(TC7109A)
Zero Input Reading
Ratio Metric Reading
NL
Nonlinearity (Max Deviation
From Best Straight Line Fit)
Roll-Over Error (Difference in
Reading for Equal Positive and
Negative Inputs Near (Full Scale)
Input Common-Mode
Rejection Ratio
Common-Mode Voltage
Range
Noise (P-P Value Not
Exceeded 95% of Time)
Leakage Current at Input
—
V
IN
= 0V
Full Scale = 409.6 mV
V
IN
= V
REF
V
REF
= 204.8 mV
Full Scale = 409.6 mV to
2.048V Over Full Operating
Temperature Range
Full Scale = 409.6 mV to
2.048V Over Full Operating
Temperature Range
V
CM
±1V,
V
IN
= 0V
Full Scale = 409.6 mV
Input High, Input Low,
and Common Pins
V
IN
= 0V
Full Scale = 409.6 mV
V
IN
, All Packages: +25°C
C Device: 0°C
≤
T
A
≤
+70°C
I Device: –25°C
≤
T
A
≤
+85°C
M Device: –55°C
≤
T
A
≤
+125°C
V
IN
= 0V
V
IN
= 408.9 mV = >7770
8
Reading, Ext Ref = 0 ppm/°C
V
IN
= 0V, Crystal Oscillator
3.58 MHz Test Circuit
Pins 2–21, 25, 26, 27, 29 Open
– 0000
8
3777
8
–1
0
±0000
8
3777
8
4000
8
±0.2
1
+0000
8
4000
8
+1
Measurement
Cycle
Octal Reading
Octal Reading
Count
Parameter
Test Conditions
Min
Typ
Max
Unit
–1
±0.02
+1
Count
CMRR
V
CMR
e
N
I
IN
—
V
–
+1.5
—
—
50
—
15
1
20
100
2
0.2
1
700
700
—
V
+
–1
—
10
100
250
5
1
5
1500
1500
µV/V
V
µV
pA
pA
pA
nA
µV/°C
µV/°C
µA
µA
TC
ZS
TC
FS
I
+
I
S
3-92
Zero Reading Drift
Scale-Factor
Temperature Coefficient
Supply Current
(V
+
to GND)
Supply Current (V
+
to V
–
)
—
—
—
—
TELCOM SEMICONDUCTOR, INC.
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
