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HI7106 の電気的特性と機能

HI7106のメーカーはIntersil Corporationです、この部品の機能は「A/D Converter」です。


製品の詳細 ( Datasheet PDF )

部品番号 HI7106
部品説明 A/D Converter
メーカ Intersil Corporation
ロゴ Intersil Corporation ロゴ 




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HI7106 Datasheet, HI7106 PDF,ピン配置, 機能
HI7106
July 1998
31/2 Digit, LCD/LED Display, A/D Converter
Features
• 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
• Low Noise - Less Than 15µVP-P
• On Chip Clock and Reference
• Low Power Dissipation - Typically Less Than 10mW
• No Additional Active Circuits Required
• Enhanced Display Stability
• Enhanced VCOM Reference Stability
Description
The Intersil HI7106 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 HI7106 is
designed to interface with a liquid crystal display (LCD) and
includes a multiplexed backplane drive.
The HI7106 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 sys-
tems, 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.
Ordering Information
PART NO.
HI7106CPL
HI7106CM44
HI7106C/D
TEMP.
RANGE (oC)
PACKAGE
0 to 70 40 Ld PDIP
0 to 70 44 Ld MQFP
0 to 70 DIE
PKG. NO.
E40.6
Q44.10x10
Pinouts
HI7106
(PDIP)
TOP VIEW
V+
D1
C1
B1
(1’s) A1
F1
G1
E1
D2
C2
B2
(10’s)
A2
F2
E2
D3
B3
(100’s)
F3
E3
(1000) AB4
(MINUS) POL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40 OSC 1
39 OSC 2
38 OSC 3
37 TEST
36 REF HI
35 REF LO
34 CREF+
33 CREF-
32 COMMON
31 IN HI
30 IN LO
29 A-Z
28 BUFF
27 INT
26 V-
25 G2 (10’s)
24 C3
23 A3 (100’s)
22 G3
21 BP/GND
HI7106
(MQFP)
TOP VIEW
NC
NC
TEST
OSC 3
NC
OSC 2
OSC 1
V+
D1
C1
B1
44 43 42 41 40 39 38 37 36 35 34
1 33
2 32
3 31
4 30
5 29
6 28
7 27
8 26
9 25
10 24
11 23
12 13 14 15 16 17 18 19 20 21 22
NC
G2
C3
A3
G3
BP/GND
POL
AB4
E3
F3
B3
A1 F1 G1 E1 D2 C2 B2 A2 F2 E2 D3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
1
File Number 4551

1 Page





HI7106 pdf, ピン配列
HI7106
Typical Application and Test Circuit
+-
IN
9V
R1 R5
R3
R4
C4
C1
C5 C2 R2
C3
DISPLAY
HI7106
DISPLAY
C1 = 0.1µF
C2 = 0.47µF
C3 = 0.22µF
C4 = 100pF
C5 = 0.02µF
R1 = 24k
R2 = 47k
R3 = 100k
R4 = 1k
R5 = 1M
FIGURE 1. HI7106 TEST CIRCUIT AND TYPICAL APPLICATION WITH LCD DISPLAY COMPONENTS
SELECTED FOR 200mV FULL SCALE
Design Information Summary Sheet
• OSCILLATOR FREQUENCY
fOSC = 0.45/RC
COSC > 50pF; ROSC > 50k
fOSC (Typ) = 48kHz
• OSCILLATOR PERIOD
tOSC = RC/0.45
• INTEGRATION CLOCK FREQUENCY
fCLOCK = fOSC/4
• INTEGRATION PERIOD
tINT = 1000 x (4/fOSC)
• 60/50Hz REJECTION CRITERION
tINT/t60Hz or tlNT/t60Hz = Integer
• OPTIMUM INTEGRATION CURRENT
IINT = 4µA
• FULL SCALE ANALOG INPUT VOLTAGE
VlNFS (Typ) = 200mV or 2V
• INTEGRATE RESISTOR
RINT = V----I-I-I-NN----F-T--S--
• INTEGRATE CAPACITOR
CINT
=
(---t--I--N----T----)--(--I--I--N----T----)
VINT
• INTEGRATOR OUTPUT VOLTAGE SWING
VINT = (---t--I--N---C-T---I-)-N-(--I--TI--N----T----)
• VINT MAXIMUM SWING:
(V- + 0.5V) < VINT < (V+ - 0.5V), VINT (Typ) = 2V
• DISPLAY COUNT
COUNT
=
1000
×
---V-----I-N-----
VREF
• CONVERSION CYCLE
tCYC = tCL0CK x 4000
tCYC = tOSC x 16,000
when fOSC = 48kHz; tCYC = 333ms
• COMMON MODE INPUT VOLTAGE
(V- + 1V) < VlN < (V+ - 0.5V)
• AUTO-ZERO CAPACITOR
0.01µF < CAZ < 1µF
• REFERENCE CAPACITOR
0.1µF < CREF < 1µF
• VCOM
Biased between Vi and V-.
• VCOM V+ - 2.8V
Regulation lost when V+ to V- < 6.8V
If VCOM is externally pulled down to (V+ to V-)/2,
the VCOM circuit will turn off.
• HI7106 POWER SUPPLY: SINGLE 9V
V+ - V- = 9V
Digital supply is generated internally
VGND V+ - 4.5V
• HI7106 DISPLAY: LCD
Type: Direct drive with digital logic supply amplitude.
3


3Pages


HI7106 電子部品, 半導体
HI7106
V+ 1M
HI7106
TO LCD
DECIMAL
POINT
BP
TEST
21
37
TO LCD
BACKPLANE
FIGURE 4. SIMPLE INVERTER FOR FIXED DECIMAL POINT
The second function is a “lamp test”. When TEST is pulled
high (to V+) all segments will be turned on and the display
should read “1888”. The TEST pin will sink about 15mA
under these conditions.
CAUTION: In the lamp test mode, the segments have a constant DC
voltage (no square-wave). This may burn the LCD display if main-
tained for extended periods.
Digital Section
Figures 6 shows the digital section for the HI7106. In the
HI7106, an internal digital ground is generated from a 6V
Zener diode and a large P-Channel source follower.
This supply is made stiff to absorb the relative large capaci-
tive currents when the back plane (BP) voltage is switched.
The BP frequency is the clock frequency divided by 800. For
three readings/sec., this is a 60Hz square wave with a nomi-
nal amplitude of 5V. The segments are driven at the same
frequency and amplitude and are in phase with BP when
OFF, but out of phase when ON. In all cases negligible DC
voltage exists across the segments.
The polarity indication is “on” for negative analog inputs. If
IN LO and IN HI are reversed, this indication can be
reversed also, if desired.
V+
BP
V+
HI7106
DECIMAL
POINT
SELECT
TO LCD
DECIMAL
POINTS
TEST
CD4030
GND
FIGURE 5. EXCLUSIVE ‘OR’ GATE FOR DECIMAL POINT DRIVE
a aa
a
fb
f bf b
gc
g
g
b ec ec ec
d dd
BACKPLANE
21
LCD PHASE DRIVER
TYPICAL SEGMENT OUTPUT
V+
0.5mA
2mA
SEGMENT
OUTPUT
INTERNAL DIGITAL GROUND
1000’s
COUNTER
TO SWITCH DRIVERS
FROM COMPARATOR OUTPUT
CLOCK
THREE INVERTERS
ONE INVERTER SHOWN FOR CLARITY
40 39
7
SEGMENT
DECODE
7
SEGMENT
DECODE
7
SEGMENT
DECODE
LATCH
100’s
10’s
1’s
COUNTER COUNTER COUNTER
÷4 LOGIC CONTROL
INTERNAL
DIGITAL
GROUND
38
VTH = 1V
÷200
1
V+
6.2V
500
TEST
37
26
V-
OSC 1
OSC 2
OSC 3
FIGURE 6. HI7106 DIGITAL SECTION
6

6 Page



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共有リンク

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部品番号部品説明メーカ
HI7106

A/D Converter

Intersil Corporation
Intersil Corporation


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