ICL7136CPLZ IC Chip 3 1/2 Digit LCD/LED , Low Power Display , A/D Converters

ICL7136

31/2 Digit LCD, Low Power Display, A/D Converter with Overrange Recovery

The Intersil ICL7136 is a high performance, low power 3¹/2 digit, A/D converter. Included are seven segment decoders, display drivers, a reference, and a clock. The ICL7136 is designed to interface with a liquid crystal display (LCD) and includes a multiplexed backplane drive.

The ICL7136 brings together a combination of high accuracy, versatility, and true economy. It features auto-zero to less than 10µV, zero drift of less than 1µV/oC, input bias current of 10pA (Max), and rollover error of less than one count. True differential inputs and reference are useful in all systems, but give the designer an uncommon advantage when measuring load cells, strain gauges and other bridge type transducers. Finally, the true economy of single power supply operation, enables a high performance panel meter to be built with the addition of only 10 passive components and a display.

The ICL7136 is an improved version of the ICL7126, eliminating the overrange hangover and hysteresis effects, and should be used in its place in all applications. It can also be used as a plug-in replacement for the ICL7106 in a wide variety of applications, changing only the passive components.

Features

• First Reading Overrange Recovery in One Conversion Period

• Guaranteed Zero Reading for 0V Input on All Scales

• True Polarity at Zero for Precise Null Detection

• 1pA Typical Input Current

• True Differential Input and Reference, Direct Display Drive - LCD ICL7136

• Low Noise - Less Than 15µV_P-P

• On Chip Clock and Reference

• No Additional Active Circuits Required

• Low Power - Less Than 1mW

• Surface Mount Package Available

• Drop-In Replacement for ICL7126, No Changes Needed

• Pb-Free Plus Anneal Available (RoHS Compliant)

Pinouts

Absolute Maximum Ratings

Supply Voltage

   ICL7136, V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15V

Analog Input Voltage (Either Input) (Note 1) . . . . . . . . . . . . V+ to V

Reference Input Voltage (Either Input). . . . . . . . . . . . . . . . . V+ to V

Clock Input

   ICL7136 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TEST to V+

Operating Conditions

Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C

Thermal Information

Thermal Resistance (Typical, Note 2)                   θ_JA (°C/W)

    PDIP Package* . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

    MQFP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . 150°C

Maximum Storage Temperature Range . . . . . . . . . . .-65°C to 150°C

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300°C

    (MQFP - Lead Tips Only)

*Pb-free PDIPs can be used for through hole wave solder processing only. They are not intended for use in Reflow solder processing applications.

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTES:

1. Input voltages may exceed the supply voltages provided the input current is limited to ±100µA.

2. θJA is measured with the component mounted on a low effective thermal conductivity test board in free air. See Tech Brief TB379 for details.

Stock Offer (Hot Sell)