TC7126 TelCom, TC7126 Datasheet - Page 2

• Manufacturer Part Number: TC7126
• Description: 3-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTERS
• Manufacturer: TelCom

TC7126
TC7126A
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage (V
Analog Input Voltage (Either Input) (Note 1) ........ V
Reference Input Voltage (Either Input) ................. V
Clock Input ...................................................... TEST to V
Operating Temperature Range
Storage Temperature Range ................ – 65 C to +150 C
Lead Temperature (Soldering, 10 sec) ................. +300 C
ELECTRICAL CHARACTERISTICS:
Symbol
Input
NL
e
I
CMRR
Analog Common
V
V
LCD Drive
V
V
Power Supply
I
NOTES: 1. Input voltage may exceed supply voltages when input current is limited to 100 A.
3-218
L
S
N
CTC
C
SD
BD
C Devices .............................................. 0 C to +70 C
I Devices ........................................... – 25 C to +85 C
2. Dissipation rating assumes device is mounted with all leads soldered to PC board.
3. Refer to "Differential Input" discussion.
4. Backplane drive is in-phase with segment drive for "OFF" segment and 180 out-of-phase for "ON" segment. Frequency is 20 times
5. See "Typical Operating Circuit."
6. During auto-zero phase, current is 10–20 A higher. A 48 kHz oscillator increases current by 8 A (typical). Common current not
conversion rate. Average DC component is less than 50 mV.
included.
Parameter
Zero Input Reading
Zero Reading Drift
Ratiometric Reading
Linearity Error
Roll-Over Error
Noise
Input Leakage Current
Common-Mode Rejection
Ratio
Scale Factor Temperature
Coefficient
Analog Common
Temperature Coefficient
Analog Common Voltage
LCD Segment Drive Voltage
LCD Backplane Drive Voltage
Power Supply Current
+
to V
–
)......................................... +15V
V
Test Conditions
V
Full Scale = 200 mV
V
Full Scale = 200 mV or 2V
Max Deviation From Best Fit
Straight Line
–V
V
V
V
Full Scale = 200 mV
V
Ext Ref Temp Coeff = 0 ppm/ C
250 k Between Common and V
0 C
TC7126
TC7126A
– 25 C
TC7126A
250 k Between Common and V
V
V
V
V
IN
IN
IN
IN
IN
CM
IN
+
IN
+
S
IN
to V
to V
= 0V
= 0V, 0 C
= V
= 0V, Full Scale = 200 mV
= 0V
= 199 mV, 0 C
= 0V, V
= +9V, f
= 1V, V
= +V
+
+
T
–
to V
to V
REF
–
A
= 9V
= 9V
T
IN
, V
A
+70 C ("C" Devices):
+
–
–
+
to V
CLK
REF
IN
200 mV
+85 C ("I" Device):
= 0V,
T
–
= 16 kHz, and T
A
= 100 mV
Power Dissipation, (T
*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.
= 9V (Note 6)
ANALOG-TO-DIGITAL CONVERTERS
T
+70 C
44-Pin PQFP .................................................... 1.00W
44-Pin PLCC .....................................................1.23W
40-Pin Plastic PDIP .......................................... 1.23W
A
+70 C
+
+
A
= +25 C, unless otherwise noted.
–000.0
Min
999
– 1
2.7
A
TELCOM SEMICONDUCTOR, INC.
—
—
—
—
—
—
—
—
—
—
—
4
4
70 C), (Note 2)
999/1000
000.0
Typ
3.05
0.2
– 1
15
50
—
—
80
35
35
55
0.2
1
1
5
5
+000.0
1000
Max
3.35
3-1/2 DIGIT
100
100
10
75
—
—
—
—
—
0.2
1
1
5
6
6
Unit
Digital
Reading
Digital
Reading
Count
1 Count
pA
ppm/ C
ppm/ C
ppm/ C
ppm/ C
V
V
V
V/ C
V
V/V
A
P-P
P-P
—
—
P-P