UNISONIC TECHNOLOGIES CO., LTD 7106
3 ½ DIGIT, LCD DISPLAY, A/D CONVERTERS
DESCRIPTION
The UTC 7106 is a high performance, low power, 3½ digits A/D converter. Included are seven segment decoders, display drivers, a reference, and a clock. The UTC 7106 is designed to interface with a liquid crystal display (LCD) and includes a multiplexed backplane drive. The UTC 7106 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 system, 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.
CMOS IC
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 Drive LCD Display *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
ORDERING INFORMATION
Ordering Number Lead Free Plating Halogen Free 7106L-D40-T 7106G-D40-T 7106L-R40-R 7106G-R40-R 7106L-R40-T 7106G-R40-T 7106L-QM1-Y 7106G-QM1-Y Package DIP-40 SSOP-40 SSOP-40 MQFP-44 Packing Tube Tape Reel Tube Tray
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PIN CONFIGURATION
DIP- 40/SSOP-40
V+ 1 D1 2 C1 3 B1 4 A1 5 F1 6 G1 7 E1 8 D2 9 C2 10 , (10 s) B2 11 A2 12 F2 13 40 OSC 1 39 OSC 2 38 OSC 3 37 TEST 36 35 34 33 32 31 30 29 28 27 REF HI REF LO CREF + CREF COMMON IN HI IN LO A-Z
CMOS IC
, (1 s)
E2 14 D3 15 B3 16 , (100 s) F3 17 E3 18 (1000) AB4 19 (MINUS) POL 20
BUFF INT 26 V, 25 G2(10 s) 24 C3 , 23 A3 (100 s) 22 G3 21 BP
MQFP - 44
NC NC TEST OSC 3 NC OSC 2 OSC 1 V+ D1 C1 B1
44 43 42 1 2 3 4 5 6 7 8 9 10 11 12 13 14
41 40 39 38
37
36 35 34 33 32 31 30 29 28 27 26 25 24
15
16
23 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
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7106
ABSOLUTE MAXIMUM RATINGS(Ta=25°C)
CMOS IC
PARAMETER SYMBOL RATINGS UNIT Supply Voltage (V+ ~ V-) VDD 15 V Analog Input Voltage (Either Input) (Note 1) VI,ANG V+ ~ VV Reference Input Voltage (Either Input) VI,REF V+ ~ VV Junction Temperature TJ 150 °C Operating Temperature TOPR 0 ~ +70 °C Maximum Storage Temperature TSTG -65 ~ +150 °C Note: 1. Input voltages may exceed the supply voltages provided the input current is limited to ±100μA. 2. Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.
THERMAL DATA
PARAMETER Thermal Junction-to-Ambient DIP-40 SSOP-40 MQFP-44 SYMBOL θJA RATINGS 50 70 75 UNIT °C/W °C/W °C/W
ELECTRICAL CHARACTERISTICS (Ta=25℃, fCLOCK=48kHz, measured by the circuit of Figure 1.)
PARAMETER SYSTEM PERFORMANCE Zero Input Reading Ratio metric Reading SYMBOL RZ RR TEST CONDITIONS VIN=0.0V, Full Scale=200mV VIN=VREF, VREF=100mV -VIN=+VIN≒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 2) VCM=1V,VIN=0V, Full Scale=200mV(Note 2) VIN=0V,Full Scale=200mV (Peak-To-Peak Value Not Exceeded 95% of Time) VIN=0(Note 2) VIN=0, 0℃ ~ 70℃ (Note 2) VIN=199mV, 0℃ ~ 70℃, (Ext.Ref.0ppm/℃) (Note 2) VIN=0 25kΩ Between Common and Positive Supply (With Respect to +Supply) 25kΩ Between Common and Positive Supply (With Respect to +Supply) 2.7 MIN -000.0 999 TYP ±000.0 999/1000 MAX +000.0 1000 UNIT Digital Reading Digital Reading Counts
Rollover Error
ER
±0.2
±1
Linearity
L
±0.2
±1
Counts
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
CMRR VN IL DZR ΦT,S IEP VCOM
50 15 1 0.2 1 1.0 3.05 10 1 5 1.8 3.3
μV/V μV pA μV/°C ppm/°C mA V
ΦT,A
80
ppm/°C
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www.unisonic.com.tw
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7106
ELECTRICAL CHARACTERISTICS(Cont.)
CMOS IC
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT DISPLAY DRIVER Peak-To-Peak Segment Drive Voltage Peak-To-Peak Backplane Drive VD,PP V+ ~ V-=9V(Note 1) 4 5.5 6 V Voltage Note: 1. 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. 2. Not tested, guaranteed by design.
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7106
TYPICAL APPLICATIONS AND TEST CIRCUIT (LCD DISPLAY COMPONENTS SELECTED FOR 200mV FULL SCALE)
CMOS IC
+
IN R1 R4 REF HI 36 REF LO 35 R5 C1 CREF + 34 CREF - 33 COM 32 C5
+
9V
DISPLAY BP 21 G2 25 C3 24 A3 23 G3 22
R3 OSC 1 40 OSC 2 39 OSC 3 38
C4 TEST 37
C2 R2 C3 A-Z 29 BUFF 28 INT 27 V- 26
IN HI 31
IN LO 30
UTC 7106
20 POL 19 AB4
DISPLAY
C1=0.1μF C2=0.47μF C3=0.22μF C4=100pF C5=0.02μF R1=24kΩ R2=47kΩ R3=91kΩ R4=1kΩ R5=1MΩ
7 G1
9 D2
10 C2
15 D3
5 A1
11 B2
12 A2
14 E2
16 B3
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18 E3
F1
13 F2
17 F3
2 D1
3 C1
4 B1
8 E1
1 V+
6
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DESIGN INFORMATION SUMMARY SHEET
*OSCILLATOR FREQUENCY fosc=0.45/RC COSC>50pF, ROSC>50kΩ fOSC (Typ)=48kHz *OSCILLATOR PERIOD tOSC=RC/0.45 *INTEGRATION CLOCK FREQUENCY fCLOCK=fOSC/4 *INTEGRATION PERIOD tINT=1000×(4/fOSC) *60/50Hz REJECTION CRITERION tINT/t60Hz or tINT/t50Hz=Integer *OPTIMUM INTEGRATION CURRENT IINT=4μA *FULL SCALE ANALOG INPUT VOLTAGE VINFS (Typ)=200mV or 2V *INTEGRATE ESISTOR RINT= VINFS/ IINT *INTEGRATE CAPACITOR CINT=(tINT)(IINT)/ VINT *INTEGRATOR OUTPUT VOLTAGE SWING VINT=(tINT)(IINT)/ CINT *VINT MAXIMUM SWING (V- + 0.5V)
