Data Sheet

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FN3082 Rev 9.00 Page 1 of 17

October 24, 2014

FN3082

Rev 9.00

October 24, 2014

ICL7106, ICL7107, ICL7107S

31/2 Digit, LCD/LED Display, A/D Converters

DATASHEET

The Intersil ICL7106 and ICL7107 are high performance, low

power, 3

digit A/D converters. Included are seven segment

decoders, display drivers, a reference, and a clock. The

ICL7106 is designed to interface with a liquid crystal display

(LCD) and includes a multiplexed backplane drive; the ICL7107

will directly drive an instrument size light emitting diode (LED)

display.

The ICL7106 and ICL7107 bring together a combination of

high accuracy, versatility, and true economy. It features

auto zero to less than 10µV, zero drift of less than 1µV/°C,

input bias current of 10pA (max) and rollover error of less than

one count. True differential inputs and reference are useful in

all systems, 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 (ICL7106), enables a high performance panel

meter to be built with the addition of only 10 passive

components and a display.

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

- LCD ICL7106, LED lCL7107

• Low noise - less than 15µV

P-P

• On-chip clock and reference

• Low power dissipation - typically less than 10mW

• No additional active circuits required

• Enhanced display stability

• Pb-free (RoHS compliant)

Ordering Information

PART NUMBER

(Note 2

)PART MARKING

TEMP. RANGE

(°C)

PACKAGE

(Pb-Free) PKG. DWG. #

ICL7106CPLZ ICL7106CPLZ 0 to 70 40 Ld PDIP (Note 3) E40.6

ICL7106CM44Z (Note 4

) ICL7106 CM44Z 0 to 70 44 Ld MQFP Q44.10x10

ICL7106CM44ZT (Notes 4

, 5) ICL7106 CM44Z 0 to 70 44 Ld MQFP Tape and Reel Q44.10x10

ICL7107CPLZ ICL7107CPLZ 0 to 70 40 Ld PDIP (Note 3) E40.6

ICL7107SCPLZ ICL7107SCPLZ 0 to 70 40 Ld PDIP (Notes 1

, 3) E40.6

ICL7107CM44Z (Note 4

) ICL7107 CM44Z 0 to 70 44 Ld MQFP Q44.10x10

ICL7107CM44ZT (Notes 4

, 5) ICL7107 CM44Z 0 to 70 44 Ld MQFP Tape and Reel Q44.10x10

NOTES:

1. “S” indicates enhanced stability.

2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte

tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil

Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

3. Pb-free PDIPs can be used for through hole wave solder processing only. They are not intended for use in Reflow solder processing applications.

4. For Moisture Sensitivity Level (MSL), please see product information page for ICL7106

, ICL7107, ICL7107S. For more information on MSL, please see

tech brief TB363

5. Please refer to TB347

for details on reel specifications.

Summary of content (17 pages)

PAGE 1
DATASHEET ICL7106, ICL7107, ICL7107S FN3082 Rev 9.00 October 24, 2014 31/2 Digit, LCD/LED Display, A/D Converters The Intersil ICL7106 and ICL7107 are high performance, low power, 31/2 digit A/D converters. Included are seven segment decoders, display drivers, a reference, and a clock. The ICL7106 is designed to interface with a liquid crystal display (LCD) and includes a multiplexed backplane drive; the ICL7107 will directly drive an instrument size light emitting diode (LED) display.
PAGE 2
ICL7106, ICL7107, ICL7107S Pin Configurations (1’s) (10’s) F1 35 REF LO G1 7 E1 8 34 CREF+ 33 CREF- D2 9 C2 10 B2 11 44 43 42 41 40 39 38 37 36 35 34 33 2 32 NC TEST 3 31 C3 OSC 3 4 30 A3 NC 5 29 G3 OSC 2 6 28 BP/GND OSC 1 7 27 POL 27 INT V+ 8 26 AB4 26 V- D1 9 25 E3 25 G2 (10’s) C1 10 24 F3 B1 11 23 12 13 14 15 16 17 18 19 20 21 22 B3 32 COMMON 31 IN HI 30 IN LO A2 12 29 A-Z F2 13 28 BUFF D3 B3 14 15 16 F3 17 24 C3 E3 18 23 A3 (1000) A
PAGE 3
ICL7106, ICL7107, ICL7107S Absolute Maximum Ratings Thermal Information Supply Voltage ICL7106, V+ to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V ICL7107, V+ to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6V ICL7107, V- to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -9V Analog Input Voltage (Either Input) (Note 6) . . . . . . . . . . . . . . . . . . .
PAGE 4
ICL7106, ICL7107, ICL7107S Electrical Specifications (Note 8) (Continued) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Except Pins AB4 and POL 5 8 - mA Pin AB4 Only 10 16 - mA Pin POL Only 4 7 - mA DISPLAY DRIVER ICL7107 ONLY Segment Sinking Current V+ = 5V, segment voltage = 3V NOTES: 8. Unless otherwise noted, specifications apply to both the ICL7106 and ICL7107 at TA = +25°C, fCLOCK = 48kHz. ICL7106 is tested in the circuit of Figure 1.
PAGE 5
ICL7106, ICL7107, ICL7107S Design Information Summary Sheet • DISPLAY COUNT • OSCILLATOR FREQUENCY V IN COUNT = 1000  --------------V REF fOSC = 0.45/RC COSC > 50pF; ROSC > 50kΩ fOSC (Typ) = 48kHz • CONVERSION CYCLE • OSCILLATOR PERIOD tCYC = tCL0CK x 4000 tCYC = tOSC x 16,000 when fOSC = 48kHz; tCYC = 333ms tOSC = RC/0.45 • INTEGRATION CLOCK FREQUENCY • COMMON MODE INPUT VOLTAGE fCLOCK = fOSC/4 (V- + 1V) < VlN < (V+ - 0.
PAGE 6
ICL7106, ICL7107, ICL7107S Detailed Description to return to zero. The time required for the output to return to zero is proportional to the input signal. Specifically the digital reading displayed is: Analog Section Figure 3 shows the analog section for the ICL7106 and ICL7107. Each measurement cycle is divided into three phases. They are (1) auto-zero (A-Z), (2) signal integrate (INT) and (3) deintegrate (DE). Auto-Zero Phase During auto-zero three things happen.
PAGE 7
ICL7106, ICL7107, ICL7107S Analog COMMON V+ This pin is included primarily to set the common mode voltage for battery operation (ICL7106) or for any system where the input signals are floating with respect to the power supply. The COMMON pin sets a voltage that is approximately 2.8V more negative than the positive supply. This is selected to give a minimum end-of-life battery voltage of about 6V. However, analog COMMON has some of the attributes of a reference voltage.
PAGE 8
ICL7106, ICL7107, ICL7107S Digital Section V+ Figures 7 and 8 show the digital section for the ICL7106 and ICL7107, respectively. In the ICL7106, 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 relatively large capacitive 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 nominal amplitude of 5V.
PAGE 9
ICL7106, ICL7107, ICL7107S a a a f g b f b e g c c a f b e d e c d 7 SEGMENT DECODE TYPICAL SEGMENT OUTPUT V+ b g c d 7 SEGMENT DECODE 7 SEGMENT DECODE LATCH 0.5mA TO SEGMENT 1000’s COUNTER 100’s COUNTER 10’s COUNTER 1’s COUNTER 8mA TO SWITCH DRIVERS FROM COMPARATOR OUTPUT DIGITAL GROUND V+ † 1 V+ CLOCK 4 LOGIC CONTROL 37 † THREE INVERTERS 27 ONE INVERTER SHOWN FOR CLARITY 40 OSC 1 39 OSC 2 TEST 500Ω DIGITAL GROUND 38 OSC 3 FIGURE 8.
PAGE 10
ICL7106, ICL7107, ICL7107S Component Value Selection Reference Voltage Integrating Resistor Both the buffer amplifier and the integrator have a class A output stage with 100µA of quiescent current. They can supply 4µA of drive current with negligible nonlinearity. The integrating resistor should be large enough to remain in this very linear region over the input voltage range, but small enough that undue leakage requirements are not placed on the PC board.
PAGE 11
ICL7106, ICL7107, ICL7107S Typical Applications Application Notes The ICL7106 and ICL7107 may be used in a wide variety of configurations. The circuits which follow show some of the possibilities, and serve to illustrate the exceptional versatility of these A/D converters. The following application notes contain very useful information on understanding and applying this part and are available from Intersil Corporation.
PAGE 12
ICL7106, ICL7107, ICL7107S Typical Applications (Continued) TO PIN 1 OSC 1 40 OSC 2 39 OSC 2 39 OSC 3 38 TEST 37 TO PIN 1 OSC 1 40 100kΩ OSC 3 38 SET VREF = 100mV 100pF TEST 37 REF HI 36 CREF 33 1kΩ 0.1µF A-Z 29 10kΩ 10kΩ 1MΩ IN HI 31 BUFF 28 V+ CREF 33 IN IN LO 30 - A3 23 V- V - 26 C3 24 TO DISPLAY A3 23 G3 22 IN LO is tied to supply COMMON establishing the correct common mode voltage.
PAGE 13
ICL7106, ICL7107, ICL7107S Typical Applications (Continued) TO PIN 1 V+ OSC 1 40 OSC 2 39 100kΩ OSC 2 39 100pF REF HI 36 REF HI 36 REF LO 35 CREF 34 CREF 34 0.1µF CREF 33 IN HI 31 IN HI 31 IN LO 30 IN LO 30 BUFF 28 INT 27 V - 26 0.47µF 47kΩ 0.22µF A3 23 A-Z 29 BUFF 28 INT 27 V - 26 TO DISPLAY C3 24 A3 23 G3 22 G3 22 GND 21 BP 21 The resistor values within the bridge are determined by the desired sensitivity. FIGURE 17.
PAGE 14
ICL7106, ICL7107, ICL7107S Typical Applications (Continued) +5V V+ TO LOGIC VCC 1 V+ OSC 1 40 1 V+ OSC 1 40 2 D1 OSC 2 39 2 D1 OSC 2 39 3 C1 OSC 3 38 3 C1 OSC 3 38 4 B1 TEST 37 4 B1 TEST 37 5 A1 REF HI 36 5 A1 REF HI 36 6 F1 REF LO 35 6 F1 REF LO 35 TO CREF 34 LOGIC GND CREF 33 7 G1 8 E1 O/RANGE 9 D2 COMMON 32 10 C2 IN HI 31 11 B2 IN LO 30 12 A2 A-Z 29 13 F2 BUFF 28 14 E2 INT 27 15 D3 V- 26 16 B3 G2 25 17 F3 C3 24 18 E3 A3 23 19 AB4 G3 22 20 POL BP 21
PAGE 15
ICL7106, ICL7107, ICL7107S Typical Applications (Continued) +5V DM7407 ICL7107 130Ω LED SEGMENTS 130Ω 130Ω FIGURE 22. DISPLAY BUFFERING FOR INCREASED DRIVE CURRENT Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to the web to make sure that you have the latest revision. DATE REVISION CHANGE October 24, 2014 FN3082.9 Updated to the newest template. Page 1: Updated copyright area.
PAGE 16
ICL7106, ICL7107, ICL7107S Dual-In-Line Plastic Packages (PDIP) E40.6 (JEDEC MS-011-AC ISSUE B) N 40 LEAD DUAL-IN-LINE PLASTIC PACKAGE E1 INDEX AREA 1 2 3 INCHES N/2 SYMBOL -B- -C- SEATING PLANE A2 e B1 D1 B 0.010 (0.25) M A1 eC C A B S MAX NOTES - 0.250 - 6.35 4 0.015 - 0.39 - 4 A2 0.125 0.195 3.18 4.95 - B 0.014 0.022 0.356 0.558 - C L B1 0.030 0.070 0.77 1.77 8 eA C 0.008 0.015 0.204 0.381 - D 1.980 2.095 D1 0.
PAGE 17
ICL7106, ICL7107, ICL7107S Metric Plastic Quad Flatpack Packages (MQFP) Q44.10x10 (JEDEC MS-022AB ISSUE B) 44 LEAD METRIC PLASTIC QUAD FLATPACK PACKAGE D D1 -D- INCHES -A- -B- E E1 e PIN 1 SEATING A PLANE -H- 0.076 0.003 -C- 12o-16o 0.40 0.016 MIN 0.20 M 0.008 C A-B S 0o MIN A2 A1 0o-7o L 12o-16o SYMBOL MIN MAX MIN MAX NOTES A - 0.096 - 2.45 - A1 0.004 0.010 0.10 0.25 - A2 0.077 0.083 1.95 2.10 - b 0.012 0.018 0.30 0.45 6 b1 0.012 0.016 0.30 0.40 - D 0.