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.
θ
JA
is measured with the component mounted on an evaluation PC board in free air.
Electrical Specifications
PARAMETER
SYSTEM PERFORMANCE
Zero Input Reading
Stability (Last Digit)
Ratiometric Reading
Rollover Error
(Note 3)
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
IN
= 0.0V, Full Scale = 200mV
Fixed Input Voltage (Note 6)
V
lN
= V
REF
, V
REF
= 100mV
-V
IN
= +V
lN
≅
200mV
Difference in Reading for Equal Positive and
Negative Inputs Near Full Scale
Full Scale = 200mV or Full Scale = 2V Maximum
Deviation from Best Straight Line Fit (Note 6)
V
CM
= 1V, V
IN
= 0V, Full Scale = 200mV (Note 6)
V
IN
= 0V, Full Scale = 200mV
(Peak-To-Peak Value Not Exceeded 95% of Time)
V
lN
= 0 (Note 6)
V
lN
= 0, 0
o
C To 70
o
C (Note 6)
V
IN
= 199mV, 0
o
C To 70
o
C
,
(Ext. Ref. 0ppm /×
o
C) (Note 6)
V
IN
= 0
25kΩ Between Common and
Positive Supply (With Respect to + Supply)
25kΩ Between Common and
Positive Supply (With Respect to + Supply)
-000.0
-000.1
999
-
±000.0
±000.0
999/10
00
±0.2
+000.0
+000.1
1000
±1
Digital
Reading
Digital
Reading
Digital
Reading
Counts
Linearity
Common Mode Rejection Ratio
Noise
Leakage Current Input
Zero Reading Drift
Scale Factor Temperature Coefficient
End Power Supply Character V+ Supply
Current
COMMON Pin Analog Common Voltage
Temperature Coefficient of Analog Common
DISPLAY DRIVER
Peak-To-Peak Segment Drive Voltage
Peak-To-Peak Backplane Drive Voltage
NOTES:
-
-
-
-
-
-
-
2.4
-
±0.2
50
15
1
0.2
1
0.6
2.8
80
±1
-
-
10
1
5
1.8
3.2
-
Counts
µV/V
µV
pA
µV/
o
C
ppm/
o
C
mA
V
ppm/
o
C
V+ = to V- = 9V (Note 5)
4
5
6
V
3. Dissipation rating assumes device is mounted with all leads soldered to printed circuit board.
4. Unless otherwise noted, specifications apply to both the HI7106 and ICL7107 at T
A
= 25
o
C, fCLOCK = 48kHz. HI7106 is tested in the
circuit of Figure 1.
5. Back plane drive is in phase with segment drive for ‘off’ segment, 180 degrees out of phase for ‘on’ segment. Frequency is 20 times
conversion rate. Average DC component is less than 50mV.
6. Not tested, guaranteed by design.
2
HI7106
Typical Application and Test Circuit
+
R
1
R
3
OSC 1 40
OSC 2 39
OSC 3 38
C
4
TEST 37
R
4
REF HI 36
REF LO 35
C
1
C
REF
+ 34
C
REF
- 33
COM 32
R
5
C
5
C
2
R
2
A-Z 29
BUFF 28
C
3
INT 27
V- 26
G2 25
DISPLAY
C
1
= 0.1µF
C
2
= 0.47µF
C
3
= 0.22µF
C
4
= 100pF
C
5
= 0.02µF
R
1
= 24kΩ
R
2
= 47kΩ
R
3
= 100kΩ
R
4
= 1kΩ
R
5
= 1MΩ
C3 24
A3 23
G3 22
19 AB4
BP 21
20 POL
-
15 D3
16 B3
14 E2
+
12 A2
IN
-
9V
IN HI 31
10 C2
HI7106
7 G1
2 D1
3 C1
4 B1
5 A1
9 D2
11 B2
1 V+
8 E1
18 E3
6 F1
13 F2
17 F3
DISPLAY
FIGURE 1. HI7106 TEST CIRCUIT AND TYPICAL APPLICATION WITH LCD DISPLAY COMPONENTS
SELECTED FOR 200mV FULL SCALE
Design Information Summary Sheet
• OSCILLATOR FREQUENCY
f
OSC
= 0.45/RC
C
OSC
> 50pF; R
OSC
> 50kΩ
f
OSC
(Typ) = 48kHz
• OSCILLATOR PERIOD
t
OSC
= RC/0.45
• INTEGRATION CLOCK FREQUENCY
f
CLOCK
= f
OSC
/4
• INTEGRATION PERIOD
t
INT
= 1000 x (4/f
OSC
)
• 60/50Hz REJECTION CRITERION
t
INT
/t
60Hz
or t
lNT
/t
60Hz
= Integer
• OPTIMUM INTEGRATION CURRENT
I
INT
= 4µA
• FULL SCALE ANALOG INPUT VOLTAGE
V
lNFS
(Typ) = 200mV or 2V
• INTEGRATE RESISTOR
V
INF S
R
I NT
= ----------------
-
I
I NT
IN LO 30
• V
INT
MAXIMUM SWING:
(V- + 0.5V) < V
INT
< (V+ - 0.5V), V
INT
(Typ) = 2V
• DISPLAY COUNT
V
I N
-
COUNT
=
1000
×
--------------
V
REF
• CONVERSION CYCLE
t
CYC
= t
CL0CK
x 4000
t
CYC
= t
OSC
x 16,000
when f
OSC
= 48kHz; t
CYC
= 333ms
• COMMON MODE INPUT VOLTAGE
(V- + 1V) < V
lN
< (V+ - 0.5V)
• AUTO-ZERO CAPACITOR
0.01µF < C
AZ
< 1µF
• REFERENCE CAPACITOR
0.1µF < C
REF
< 1µF
• V
COM
Biased between Vi and V-.
• V
COM
≅
V+ - 2.8V
Regulation lost when V+ to V- <
≅6.8V
If V
COM
is externally pulled down to (V+ to V-)/2,
the V
COM
circuit will turn off.
• HI7106 POWER SUPPLY: SINGLE 9V
V+ - V- = 9V
Digital supply is generated internally
V
GND
≅
V+ - 4.5V
• HI7106 DISPLAY: LCD
Type: Direct drive with digital logic supply amplitude.
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