tc7136a Microchip Technology Inc., tc7136a Datasheet - Page 6

• Manufacturer Part Number: tc7136a
• Description: Low Power 3-1/2 Digit Analog-to-digital Converter
• Manufacturer: Microchip Technology Inc.

TC7136/TC7136A
TC7136 AND TC7136A ELECTRICAL SPECIFICATIONS (CONTINUED)
DS21461B-page 6
Symbol
Analog Common
V
V
LCD Drive
V
V
Power Supply
I
Note 1: Input voltages may exceed supply voltages when input current is limited to 100µA.
Electrical Characteristics: V
S
CTC
C
SD
BD
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
5: See "Typical Application".
6: A 48kHz oscillator increases current by 20µA (typical). Common current not included.
Analog Common Temperature
Coefficient
Analog Common Voltage
LCD Segment Drive Voltage
LCD Backplane Drive Voltage
Power Supply Current
is 20 times conversion rate. Average DC component is less than 50mV.
TC7136A
TC7136
TC7136A
TC7136
Parameter
S
= 9V, f
CLK
= 16kHz, and T
Min
2.7
—
—
—
—
—
4
4
A
3.05
Typ
35
70
35
70
70
= +25°C, unless otherwise noted.
5
5
Max
3.35
150
100
150
100
75
6
6
ppm/°C
ppm/°C
ppm/°C
ppm/°C
Unit
V
V
µA
V
P-P
P-P
250kΩ between Common and V+
0° C ≤ T
"C" Commercial Temp. Range Devices
-25°C ≤ T
"I" Industrial Temp. Range Devices
250kΩ Between Common and V+
V+ to V- = 9V
V+ to V- = 9V
V
IN
= 0V, V+ to V- = 9V (Note 6)
A

A
≤ +70°C
2002 Microchip Technology Inc.
≤ +85°C
Test Conditions