TC7136ACPL

Conversion Rate :
Supply Voltage - Max :
Supply Voltage - Min :
Packaging :
Input Type : Voltage
Maximum Power Dissipation : 0.5 mW
Number of Converters : 1
Number of ADC Inputs : 1
SNR : No
Maximum Operating Temperature : + 70 C
Mounting Style : Through Hole
Voltage Reference : Internal, External
Architecture : Dual Slope
Resolution : 3.5 bit
Package / Case : PDIP-40
Interface Type : LCD


Features:

Fast Overrange Recovery, Guaranteed First Reading Accuracy
Low Temperature Drift Internal Reference 
       TC7136 ....................................... 70 ppm/°C
       Typ TC7136A ..................................... 35 ppm/°C Typ
Guaranteed Zero Reading With Zero Input
Low Noise .................................................... 15 mVP-P
High Resolution .............................................. 0.05%
Low Input Leakage Current ...................... 1 pA Typ 10 pA Max
Precision Null Detectors With True Polarity at Zero
High-Impedance Differential Input
Convenient 9V Battery Operation With Low Power Dissipation ........................ 500 mW Typ 900 mW Max


Application

Thermometry
Bridge Readouts: Strain Gauges, Load Cells, Null Detectors
Digital Meters: Voltage/Current/Ohms/Power, pH
Digital Scales, Process Monitors
Portable Instrumentation


Pinout




Specifications

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 (TA £ 70°C) (Note 2)
Plastic DIP .................................................................1.23W
Plastic Quad Flat Package ..........................................1.00W
PLCC .........................................................................1.23W
Operating Temperature Range
C Devices ..................................................... 0°C to +70°C
I Devices ................................................ 25°C to +85°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. Stressesabove those listed under Absolute Maximum Ratings may cause 
permanent damage to the device. These are stress ratings only and functionaloperation 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.

Description

The TC7136ACPL are low-power, 3-1/2 digit with liquid crystal display (LCD) drivers with analog-todigital converters. These devices incorporate an "integrator output zero" phase which guarantees overrange recovery. The performance of existing TC7126, TC7126A and ICL7126-based systems may be upgraded with minor changes to external, passive components.

The TC7136ACPL has an improved internal zener reference voltage circuit which maintains the analog common temperature drift to 35 ppm/°C (typical) and 75 ppm/°C (maximum). This represents an improvement of two to four times over similar 3-1/2 digit converters. The costly, spaceconsuming external reference source may be removed.