2002-2012 Microchip Technology Inc. DS21458D-page 5
TC7126/A
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Supply Voltage (V+ to V-).......................................15V
Analog Input Voltage (either Input) (Note 1) ... V+ to V-
Reference Input Voltage (either Input) ............ V+ to V-
Clock Input................................................... Test to V+
Package Power Dissipation (T
A
70°C) (Note 2):
44-Pin PQFP...............................................1.00W
40-Pin PLCC...............................................1.23W
44-Pin PDIP................................................1.23W
Operating Temperature Range:
C (Commercial) Devices.................. 0°C to +70°C
I (Industrial) Devices....................-25°C to +85°C
Storage Temperature Range..............-65°C to +150°C
*Stresses above 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
above those indicated in the operation sections of the
specifications is not implied. Exposure to Absolute
Maximum Rating conditions for extended periods may
affect device reliability.
TABLE 1-1: TC7126/A ELECTRICAL SPECIFICATIONS
Electrical Characteristics: V
S
= +9V, f
CLK
– 16kHz, and T
A
= +25°C, unless otherwise noted.
Symbol Parameter Min Typ Max Unit Test Conditions
Input
Z
IR
Zero Input Reading -000.0 ±000.0 +000.0 Digital
Reading
V
IN
= 0V
Full Scale = 200mV
Z
RD
Zero Reading Drift — 0.2 1 V/°C V
IN
= 0V, 0°C T
A
+70°C
Ratiometric Reading 999 999/1000 1000 Digital
Reading
V
IN
= V
REF
, V
REF
= 100mV
NL Linearity Error -1 ±0.2 1 Count Full Scale = 200mV or 2V
Max Deviation From Best Fit
Straight Line
Rollover Error -1 ±0.2 1 Count V
IN
- = V
IN
+ 200mV
e
N
Noise — 15 — V
P-P
V
IN
= 0V, Full Scale = 200mV
I
L
Input Leakage Current — 1 10 pA V
IN
= 0V
CMRR Common Mode Rejection Ratio — 50 — V/V V
CM
= ±1V, V
IN
= 0V
Full Scale = 200mV
Scale Factor Temperature
Coefficient
— 1 5 ppm/°C V
IN
= 199mV, 0°C T
A
+70°C
Ext. Ref. Temp Coeff. = 0ppm/°C
Analog Common
V
CTC
Analog Common Temperature
Coefficient
— — — — 250k Between Common and V+
—— — —0°C T
A
+70°C (“C” Devices)
— 80 — ppm/°C TC7126
— 35 75 ppm/°C TC7126A
— 35 100 ppm/°C -25°C T
A
+85°C (“I” Device)
(TC7126A)
Note 1: Input voltages may exceed the supply voltages, provided the input current is limited to ±100A.
2: Dissipation rating assumes device is mounted with all leads soldered to printed circuit board.
3: Refer to “Differential Input” discussion.
4: Backplane drive is in phase with segment drive for “OFF” segment, 180° out of phase for “ON” segment. Frequency is
20 times conversion rate. Average DC component is less than 50mV.
5: See “Typical Application”.
6: During Auto-Zero phase, current is 10-20A higher. A 48kHz ocillator increases current by 8A (Typical). Common
current is not included.
