TC7106/7 ....................................... 80ppm/
TC7106A/7A .................................. 20ppm/
High Impedance CMOS Differential Inputs .... 10
鈩?/div>
s
Differential Reference Inputs Simplify Ratiometric
Measurements
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Low Power Operation ..................................... 10mW
1
GENERAL DESCRIPTION
The TC7106A and TC7107A 3-1/2 digit direct-display
drive analog-to-digital converters allow existing 7106/7107
based systems to be upgraded. Each device has a preci-
sion reference with a 20ppm/擄C max temperature coeffi-
cient. This represents a 4 to 7 times improvement over
similar 3-1/2 digit converters. Existing 7106 and 7107 based
systems may be upgraded without changing external pas-
sive component values. The TC7107A drives common
anode light emitting diode (LED) displays directly with 8mA
per segment. A low-cost, high-resolution indicating meter
requires only a display, four resistors, and four capacitors.
The TC7106A low power drain and 9V battery operation
make it suitable for portable applications.
The TC7106A/TC7107A reduces linearity error to less
than 1 count. Rollover error 鈥?the difference in readings for
equal magnitude but opposite polarity input signals 鈥?is
below
鹵1
count. High impedance differential inputs offer
1pA leakage current and a 10
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