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HI7131のメーカーはIntersil Corporationです、この部品の機能は「(HI7131 / HI7133) LCD/LED Display-Type A/D Converters」です。 |
部品番号 | HI7131 |
| |
部品説明 | (HI7131 / HI7133) LCD/LED Display-Type A/D Converters | ||
メーカ | Intersil Corporation | ||
ロゴ | |||
このページの下部にプレビューとHI7131ダウンロード(pdfファイル)リンクがあります。 Total 25 pages
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31/2 Digit, Low Power, High CMRR,
LCD/LED Display-Type A/D Converters
Features
• 120dB CMRR Equal to ±0.01 Count/V of Common
Mode Voltage Error
• Fast Recovery from Input Overrange Results “Correct
First-Reading” After Overload
• Guaranteed 0000 Reading for 0V Input
• True Polarity at Zero for Precise Null Detection
• 1pA Input Current (Typ)
• True Differential Input and Reference
• Single or Dual Supply Operation Capability
• Direct LCD Display Drive - HI7131
• Direct LED Display Drive - HI7133
• Low Noise, 15µVP-P Without Hysteresis or Overrange
Hangover
• Low Power Dissipation, Guaranteed Less Than 1mW,
Results 8000 Hours (Typ) 9V Battery Life
• No Additional Active Components Required
Description
The Intersil HI7131 and HI7133 are 31/2 digit, A/D convert-
ers that have been optimized for superior DC Common
Mode Rejection (CMRR) when used with a split ±5V supply
or a single 9V battery. The HI7131 contains all the neces-
sary active components on a single IC to directly interface an
LCD (Liquid Crystal Display). The supply current is under
100µA and is ideally suited for battery operation. The HI7133
contains all the necessary active components on a single IC
to directly interface an LED (Light Emitting Diode).
The HI7131 and HI7133 feature high accuracy performance
like,
fast
120dB of CMRR, auto-zero to
recovery from over load, zero
less than 10µV
drift of less than
of offset,
1µV/oC,
input bias current of 10pA maximum, and rollover error of
less than one count. A true differential signal and reference
inputs are useful features in all systems, but gives the
designer an advantage when measuring load cells, strain
gauges and other bridge-type transducers.
The HI7131 and HI7133 are supplied in a 40 lead plastic DIP
and a 44 lead metric plastic quad flatpack package.
Ordering Information
Applications
• Handheld Instruments
• Basic Measurements: Voltage, Current, Resistance
Pressure, Temperature, Fluid Flow and Level, pH,
Weight, Light Intensity
• DMMs and DPMs
PART NO.
HI7131CPL
HI7131CM44
HI7133CPL
HI7133CM44
TEMP.
RANGE (oC)
PACKAGE
0 to 70 40 Ld PDIP
0 to 70 44 Ld MQFP
0 to 70 40 Ld PDIP
0 to 70 44 Ld MQFP
PKG. NO.
E40.6
Q44.10x10
E40.6
Q44.10x10
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002. All Rights Reserved
1
File Number 3373.3
1 Page HI7131, HI7133
LCD/LED
DISPLAY
ANALOG
INPUT
A-Z
BUFF
INT
V+
OSC1
OSC2
OSC3
IN HI
CREF+
IN LO
CREF-
REF HI
COMMON
REF LO
V-
FIGURE 89. TYPICAL APPLICATION CIRCUIT
9V
3
3Pages HI7131, HI7133
Electrical Specifications (Notes 5, 6, 7) TA = 25oC. Device is Tested in the Circuit Shown in Figure 2.
Full Scale Range (FSR) = 200.0mV, Unless Otherwise Specified (Continued)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
UNITS
V+ Supply Current (Note 10)
V- Supply Current (Notes 5, 10)
VIN = 0V
Oscillator Frequency = 16kHz
Does Not Include COMMON Pin and Display
Current
- 70 100
- 40 -
µA
µA
Power Dissipation Capacitance
Versus Clock Frequency (Notes 5, 8)
- 40 -
pF
NOTES:
4. Dissipation rating assumes device is mounted with all leads soldered to printed circuit board.
5. All typical values have been characterized but not tested.
6. See “Parameters Definition” section.
7. Count is equal to one number change in the least significant digit of the display.
8. Parameter not tested on a production basis, guaranteed by design and/or characterization.
9. See “Differential Input” section.
10. 48kHz oscillator increases current by 20µA (Typ).
Design Information Summary Sheet
• OSCILLATOR FREQUENCY
fOSC ≈ 0.45/RC(OSC)
COSC ≥ 50pF
ROSC > 50kΩ
COSC = 50pF, ROSC = 180kΩ; fOSC (Typ) = 48kHz
• CLOCK FREQUENCY
fCLOCK = fOSC/4
• CLOCK PERIOD
tCLOCK = 1/fCLOCK
• CONVERSION CYCLE
TCYC = 4000 x tCLOCK = 16000 x tOSC
For fOSC = 40kHz; TCYC = 400ms
• SIGNAL INTEGRATION PERIOD
TINT = 1000 x tCLOCK
• 60/50Hz REJECTION CRITERIA
TINT / t60Hz or TINT / t50Hz = Integer
• OPTIMUM FULL SCALE ANALOG INPUT RANGE
VINFS = 200mV to 2V
• INPUTS VOLTAGE RANGE
(V- + 1V) < VIN LO or VIN HI < (V+ - 1V)
• MAXIMUM INTEGRATION CURRENT
IINT(MAX) = VINFS / RINT
Maximum integration current should be the maximum
buffer output current with no nonlinearity effect.
Maximum Buffer Output Current = 1µA
• INTEGRATOR MAXIMUM OUTPUT VOLTAGE SWING
• INTEGRATING RESISTOR
RINT = VINFS / IINT(MAX)
• INTEGRATING CAPACITOR
CINT = (TINT) (IINT(MAX)) / VINT(MAX)
• AUTO-ZERO CAPACITOR VALUE
REFERENCE CAPACITOR VALUE
0.1µF < CREF < 1µF
• REFERENCE INPUTS VOLTAGE RANGE
V- < VREFLO or VREFHI < V+
• REFERENCE VOLTAGE
VREF = VINFS/ 2
• COMMON PIN VOLTAGE
VCOMMON = V+ - 2.8, (Typ), VCOMMON is regulated and
can be used as a reference. It is biased between V+ and
V- and regulation is lost at (V+ -V-) < 6.8V. VCOMMON pin
does not have sink capability and can be externally pulled
down to lower voltages.
• DISPLAY TYPE
LCD, Non-Multiplexed
• POWER SUPPLY, V+ TO V-
Single +9V or ±5V Nominal, +5V to +12V Functional
• DISPLAY READING
Reading = 1000 x (VIN / VREF)
Maximum Reading = 1999, for VIN = 1.999 x VREF
VINT(MAX) = (TINT) (IINT(MAX))/CINT
(V- + 0.5) < VINT(MAX) < (V+ - 0.5)
(Typ) VINT(MAX) = 2V
6
6 Page | |||
ページ | 合計 : 25 ページ | ||
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PDF ダウンロード | [ HI7131 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
HI7131 | (HI7131 / HI7133) LCD/LED Display-Type A/D Converters | Intersil Corporation |
HI7133 | (HI7131 / HI7133) LCD/LED Display-Type A/D Converters | Intersil Corporation |