AME, Inc.
AME7106/AME7106A/AME7106R
AME7107/AME7107A/AME7107R
3-1/2 Digit A/D Converter
High Accuracy, Low Power
n
Key Features
l
100µV Resolution
l
High Impedance Differential Inputs
l
Differential Reference
l
Drive LCD (AME7106) or LED (AME7107)
Directly
l
Four New Convenient Features
(AME7106A/AME7107A)
l
Display-Hold
l
Low-Battery Indication
l
Integration Status Indication
l
De-Integration Status Indication
n
General Description
The AME7106 and AME7107 family are high perfor-
mance, low power, 3-1/2 digit, dual-slope integrating A/
D converters, with on-chip display drivers. The
AME7106 is designed for a single battery operated sys-
tem, will drive non-multiplexed LCD display directly.
The AME7107 is designed for a dual power supply sys-
tem, will directly drive common anode LED display.
These A/D converters are inherently versatile and ac-
curate. They are immune to the high noise environ-
ments. The true differential high impedance inputs and
differential reference are very useful for making
ratiometric measurement, such as resistance, strain
gauge and bridge transducers. The built-in auto-zero
feature automatically corrects the system offset with-
out any external adjustments.
Display-hold, low-battery flag, integration and de-inte-
gration status flags are four additional features which
are available in the 44-pin package, AME7106ACKW
and AME7107ACKW.
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Applications
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Digital multimeter
l
pH meter
l
Capacitance meter
l
Thermometer
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Digital Panel meter
l
Photometer
n
Typical Operating Circuit
*
For the operating circuit of the reverse-pins version, please refer
to pin configuration on page 4 and pin description on page 5 & 6
1
AME, Inc.
AME7106/AME7106A/AME7106R
AME7107/AME7107A/AME7107R
3-1/2 Digit A/D Converter
High Accuracy, Low Power
n
Absolute Maximum Ratings
AME7106
Supply Voltage (V+ to V-)
Analog Input Voltage (Either inputs)
Reference Input Voltage (Either inputs)
Clock Input
Power Dissipation
Operating Temperature
Storage Temperature
Lead Temperature (Soldering 60 seconds)
12V
V+ TO V-
V+ TO V-
Test to V+
800mW
0
o
C to 70
o
C
-55
o
C to 150
o
C
300
o
C
AME7107
Supply Voltage
V+
V-
Analog Input Voltage (Either inputs)
Reference Input Voltage (Either inputs)
Clock Input
Power Dissipation
Operating Temperature
Storage Temperature
Lead Temperature (Soldering 60 seconds)
6V
-6V
V+ to V-
V+ to V-
Gnd to V+
800mW
0 C to 70 C
-55 C to 150 C
o
300 C
o
o
o
o
Static sensitive device. Unused devices must be stored in the conductive material.
Protect device from static discharge and static field. Stresses exceed the above Absolute Maximum
Ratings may cause permanent damage to the device. Exposure to Absolute Maximum Rating Con-
ditions for extended periods may affect the reliability of the device.
2
AME, Inc.
AME7106/AME7106A/AME7106R
AME7107/AME7107A/AME7107R
3-1/2 Digit A/D Converter
High Accuracy, Low Power
n
Electrical Characteristics
Unless otherwise noted, AME7106 & AME7107 are specified at T
A
= 25
O
C
, f
clock
= 48KHz. Supply voltage = 9V (V+ to V-)
Parameter
Zero Input Reading
Ratiometric Reading
Roll-Over Error
(Difference in Reading for
Equal Positive and Negative
Reading Near Full-Scale)
Linearity (Max. Deviation
From Best Straight Line Fit)
Common-Mode
Rejection Ratio
Noise (Pk-Pk Value Not
Exceeded 95% of Time)
Leakage Current at Input
Zero Reading Drift
Supply Current
(Excluding LED current
for 7107)
Analog Common Voltage
(With respect to V+)
Temp. Coeff. of Analog
Common (With respect to V+)
Low Battery Flag
Test Pin Voltage
(AME7106 only)
LCD Segment Drive Voltage
(AME7106 only)
Backplane Drive Voltage
(AME7106 only)
Segment Sinking Current
(Except Segment AB4)
(AME7107 only)
Segment Sinking Current
(Segment AB4)
(AME7107 only)
Conditions
Vin = 0V
Full-Scale = 200.0mV
Vin = Vref = 100.0mV
Min
Typ
0
Max
Unit
Digital Reading
999
-1
999/1000
–0.2
1000
+1
Digital Reading
Counts
-Vin=+Vin
≈
200.0mV
Full-Scale = 200.0mV
Vcm = –1V, Vin =0V
Full-Scale = 200.0mV
Vin = 0V
Full-Scale = 200.0mV
Vin = 0V
Vin = 0V, 0
O
C to 70
O
C
Vin = 0V
-1
–0.2
50
15
1
0.2
0.8
+1
Counts
µ
V/V
µ
V
10
1
1.2
pA
O
µ
V/ C
mA
25K
Ω
Between
Common and V+
25K
Ω
Between
Common and V+
0
O
C
≤
TA
≤
70
O
C
V+ to V-
With respect to V+
V+ to V- = 9V
V+ to V- = 9V
V+ = 5.0V
Segment Voltage = 3V
V+ = 5.0V
Segment Voltage = 3V
2.8
3.0
50
3.2
75
V
ppm/
O
C
6.3
4
4
4
5
7.0
5
5
5
8.0
7.7
6
6
6
V
V
V
V
mA
10
16
mA
Notes: 1. Input voltage may exceed the supply voltages provided the input current is limited to ±100µA.
2. Dissipation rating assumes a device is mounted with all leads soldered to printed circuit board.
4
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