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Semiconductor
IH5140 thru IH5145
T CT DUC PRO PRODU ETE UTE OL High-Level CMOS Analog Switches April 1999 OBS UBSTIT 01 043 LE S 41: DG4 03, HI-5 390 SIB POS 40, IH51 42, DG4 43, HI-0 045 51 : HI-50 , HI-50 9, HI-5 Features IH 42 4 vices Description 03 IH51 43: DG4 45: HI-50 f single de patible * Super Fast Break-Before-Make Switching The IH5140 Family of CMOS switches utilizes Harris' latchIH51 44, IH51 in count o pin com free junction isolated processing to build the fastest switches IH51 out and p vices to be * SPST Switches (Typ)
de Pin dual TE: l - tON . . . . . . .NO. . . . .a.low. . .ments.. . . . . . . . . . . . 80ns .. .. .... lace .. - tOFF . . . . . . . . . . . . . rep. . . . . . . . . . . . . . . . . . . . 50ns
* Power Supply Currents . . . . . . . . . . . . . . . . . . . . <1A * OFF Leakages at 25oC (Typ) . . . . . . . . . . . . . . . <100pA * Non-Latching with Supply Turn-Off * Single Monolithic CMOS Chip * Plug-In Replacements for IH5040 Family and Part of the DG180 Family to Upgrade Speed and Leakage * Toggle Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >1MHz * Switches Signals with 15V Supplies. . . . . . . . . . . . >20VP-P * TTL, CMOS Direct Compatibility * Internal Diode in Series with V+ for Fault Protection
currently available. These switches can be toggled at a rate of greater than 1MHz with fast tON times (80ns typical) and faster tOFF times (50ns typical), guaranteeing break before make switching. This family of switches combines the speed of the hybrid FET DG180 family with the reliability and low power consumption of a monolithic CMOS construction.
Very low quiescent power is dissipated in either the ON or the OFF state of the switch. Maximum power supply current is 10A (at 25oC) from any supply and typical quiescent currents are in the 10nA which makes these devices ideal for portable equipment and military applications. The IH5140 Family is completely compatible with TTL (5V) logic, TTL open collector logic and CMOS logic. It is pin compatible with Harris' IH5040 family and part of the DG180/DG190 family as shown in the switching state diagrams.
Part Number Information
PART NUMBER IH5140MJE IH5140CJE IH5140CPE IH5141MJE IH5141CJE IH5141CPE IH5142MJE IH5142CJE IH5142CPE IH5143MJE IH5143CJE IH5143CPE IH5144MJE IH5144CJE IH5144CPE IH5145MJE IH5145CJE IH5145CPE IH5140MJE/883B IH5141MJE/883B IH5142MJE/883B IH5143MJE/883B IH5144MJE/883B IH5145MJE/883B NOTE: 1. For MIL-STD-883 compliant parts, request the /883 datasheet on the above products.
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures. Copyright
FUNCTION SPST SPST SPST Dual SPST Dual SPST Dual SPST SPDT SPDT SPDT Dual SPDT Dual SPDT Dual SPDT DPST DPST DPST Dual DPST Dual DPST Dual DPST SPST Dual SPST SPDT Dual SPDT DPST Dual DPST
TEMP. RANGE (oC) -55 to 125 0 to 70 0 to 70 -55 to 125 0 to 70 0 to 70 -55 to 125 0 to 70 0 to 70 -55 to 125 0 to 70 0 to 70 -55 to 125 0 to 70 0 to 70 -55 to 125 0 to 70 0 to 70 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125
PACKAGE 16 Ld CerDIP 16 Ld CERDIP 16 Ld PDIP 16 Ld CerDIP 16 Ld CERDIP 16 Ld PDIP 16 Ld CerDIP 16 Ld CERDIP 16 Ld PDIP 16 Ld CERDIP 16 Ld CerDIP 16 Ld PDIP 16 Ld CERDIP 16 Ld CERDIP 16 Ld PDIP 16 Ld CerDIP 16 Ld CerDIP 16 Ld PDIP 16 Ld CERDIP 16 Ld CERDIP 16 Ld CERDIP 16 Ld CERDIP 16 Ld CERDIP 16 Ld CERDIP
PKG. NO.
(c) Harris Corporation 1999
File Number
3132.2
13-1
IH5140 thru IH5145 Pinouts
IH5140 (PDIP, CERDIP) TOP VIEW
D1 NC 2 NC 3 NC 4 NC 5 NC 6 NC 7 NC 8 16 S 15 IN 14 V13 GND 12 VL 11 V+ 10 NC 9 NC
IH5141 (PDIP, CERDIP) TOP VIEW
D1 1 NC 2 NC 3 NC 4 NC 5 NC 6 NC 7 D2 8 16 S1 15 IN1 14 V13 GND 12 VL 11 V+ 10 IN2 9 S2
IH5142 (PDIP, CERDIP) TOP VIEW
D1 1 NC 2 16 S1 15 IN 14 V13 GND 12 VL 11 V+ 10 NC 9 NC D1 1 NC 2
IH5143 (PDIP, CERDIP) TOP VIEW
16 S1 15 IN1 14 V13 GND 12 VL 11 V+ 10 IN2 9 S2
D2 3 S2 4 NC NC NC NC 5 6 7 8
D3 3 S3 4 S4 5 D4 6 NC 7
D2 8
IH5144 (PDIP, CERDIP) TOP VIEW
D1 1 NC 2 D2 3 S2 4 NC 5 NC 6 NC 7 NC 8 16 S1 15 IN 14 V13 GND 12 VL 11 V+ 10 NC 9 NC D1 1 NC 2 D3 3 S3 4 S4 5 D4 6 NC 7 D2 8
IH5145 (PDIP, CERDIP) TOP VIEW
16 S1 15 IN1 14 V13 GND 12 VL 11 V+ 10 IN2 9 S2
13-2
IH5140 thru IH5145 Functional Block Diagram
TYPICAL DRIVER/GATE - IH5142
V+
Q3
Q7
Q5
S1 Q18 Q16
10k
5k Q2 D1 Q12 V5k 3k S2 Q13 Q4 Q6 Q11 Q15 Q17
T2L INPUT
100
Q1
Q8
Q9
Q10 V+ D2 Q14 VL V-
13-3
IH5140 thru IH5145 Switching State Diagrams
DIP (JE, PE) SPST IH5140
VL 12 16 S 15 IN IN2 S2 13 GND V14 13 GND V14 10 9 8 D2 V+ 11 16 1 D IN1 S1 15
DIP (JE, PE) DUAL SPST IH5141
VL 12 V+ 11 1 D1
DIP (JE, PE) SPDT IH5142
VL 12 16 S1 4 S2 IN 15 V+ 11 1 D1 3 D2 S1 S3 IN1 IN2 13 GND V14 S2 S4 10 9 5 16 4 15
DIP (JE, PE) DUAL SPDT IH5143
VL 12 V+ 11 1 3 D1 D3
8 6
D2 D4
13 GND V-
14
DIP (JE, PE) DPST IH5144
VL 12 16 S1 4 S2 IN 15 V+ 11 1 D1 3 D2 S1 S3 IN1 IN2 13 GND V14 S2 S4 10 9 5 16 4 15
DIP (JE, PE) DUAL DPST IH5145
VL 12 V+ 11 1 3 D1 D3
8 6
D2 D4
13 GND V-
14
13-4
IH5140 thru IH5145
Absolute Maximum Ratings
V+ to V-. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <36V V+ to VD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <30V VD to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <30V VD to VS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <22V VL to V- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <33V VL to VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <30V VL to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <20V VIN to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <20V Current (Any Terminal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30mA
Thermal Information
Thermal Resistance (Typical) JA (oC/W) JC (oC/W) CERDIP Package . . . . . . . . . . . . . . . . 80 24 PDIP Package . . . . . . . . . . . . . . . . . . . 100 N/A Maximum Junction Temperature CERDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175oC PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150oC Maximum Storage Temperature Range . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300oC
Operating Conditions
Temperature Ranges Military . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55oC to 125oC Commercial. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0oC to 70oC
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.
Electrical Specifications
PER CHANNEL PARAMETER LOGIC INPUT Input Logic Current, IINH Input Logic Current, IINL SWITCH Drain Source On Resistance, rDS(ON)
25oC, V+ = +15V, V- = -15V, VL = +5V MILITARY TEST CONDITIONS -55oC 1 1 50 VD = +10V, VS = -10V VD = -10V, VS = +10V VD = VS = -10V to +10V One Channel Off; Any Other Channel Switches, See Performance Characteristics 25oC 1 1 50 25 (Typ) 11 (Typ) 0.5 0.5 1 54 (Typ) 125oC COMMERCIAL 0o C - - 75 25oC 10 10 75 30 (Typ) 10 (Typ) 5 5 2 50 (Typ) 70oC UNITS A A V nA nA nA dB
VIN = 2.4V, Note 1 VIN = 0.8V, Note 1 IS = -10mA, VANALOG = -10V to +10V
10 10
10 10
75 100 100 200 -
100 100 100 200 -
Channel to Channel rDS(ON) Match, rDS(ON) Minimum Analog Signal Handling Capability, VANALOG Switch OFF Leakage Current, ID(OFF)+IS(OFF) Switch On Leakage Current, ID(ON)+IS(ON) Minimum Channel to Channel Cross Coupling Rejection Ratio, CCRR Switch "ON" Time, tON Switch "OFF" Time, tOFF Charge Injection, Q(INJ) Minimum Off Isolation Rejection Ratio, OIRR SUPPLY + Power Supply Quiescent Current, I+ V+ = +15V, V- = -15V, - Power Supply Quiescent Current, I- VL = +5V, See Performance Characteristics +5V Supply Quiescent Current, IL Ground Supply Quiescent Current, IGND NOTES:
See Switching Time Specifications and Timing Diagrams See Switching Time Specifications and Timing Diagrams See Performance Characteristics f = 1MHz, RL = 100, CL 5pF, See Performance Characteristics 10 (Typ) 54 (Typ) 15 (Typ) 50 (Typ) pC dB
1.0 1.0 1.0 1.0
1.0 1.0 1.0 1.0
10 10 10 10
10 10 10 10
10 10 10 10
100 100 100 100
A A A A
1. Some channels are turned on by high (1) logic inputs and other channels are turned on by low (0) inputs; however 0.8V to 2.4V describes the minimum range for switching properly. Refer to logic diagrams to find logical value of logic input required to produce ON or OFF state. 2. Typical values are for design aid only, not guaranteed and not subject to production testing.
13-5
IH5140 thru IH5145
Switching Time Specifications
tON , tOFF are Maximum Specifications and tON - tOFF is Minimum Specification TEST CONDITIONS Figure 8, Note 2 MILITARY -55oC Figure 7 Figure 8, Note 2 Figure 7 Figure 2, Note 2 Figure 3, Note 2 Figure 8, Note 2 Figure 7 25oC 100 75 10 150 125 175 125 10 200 125 175 125 10 200 125 10 175 125 10 200 125 125oC COMMERCIAL 0 oC 25oC 150 125 5 175 150 250 150 5 300 150 250 150 5 300 150 5 250 150 5 300 150 70oC UNITS ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns
PART NUMBER IH5140, IH5141
SPECIFICATIONS Switch "ON" Time, tON Switch "OFF" Time, tOFF Break-Before-Make, tON - tOFF Switch "ON" Time, tON Switch "OFF" Time, tOFF
IH5142, IH5143
Switch "ON" Time, tON Switch "OFF" Time, tOFF Break-Before-Make, tON - tOFF Switch "ON" Time, tON Switch "OFF" Time, tOFF Switch "ON" Time, tON Switch "OFF" Time, tOFF Break-Before-Make, tON - tOFF Switch "ON" Time, tON Switch "OFF" Time, tOFF Break-Before-Make, tON - tOFF
IH5144, IH5145
Switch "ON" Time, tON Switch "OFF" Time, tOFF Break-Before-Make, tON - tOFF Switch "ON" Time, tON Switch "OFF" Time, tOFF
NOTES: 1. Switching times are measured at 90% points. 2. Typical values are for design aid only, not guaranteed and not subject to production testing.
13-6
IH5140 thru IH5145 Typical Performance Curves
90 IH5141 DATA 80 70 rDS(ON) () rDS(ON) () 60 50 125oC 40 25oC 30 20 +10 -55oC 30 20 +10 40 15V, +5V SUPPLIES 90 80 60 50 10V, +5V SUPPLIES 5V, +5V SUPPLIES 100 TA = 25oC IH5141 DATA
+8
+6
+4
+2
0
-2
-4
-6
-8
-10
+8
+6
+4
+2
0
-2
-4
-6
-8
-10
ANALOG SIGNAL VOLTAGE (V)
ANALOG SIGNAL VOLTAGE (V)
FIGURE 1. rDS(ON) vs TEMPERATURE AT 15V, +5V SUPPLIES
FIGURE 2. rDS(ON) vs POWER SUPPLIES
-120 -100 -80 -60 -40
COAX TO SCOPE VOUT 1 51 2 3 4 5 6 7
VANALOG - 10VP-P AT FREQUENCY 16 15 14 -15V 13 12 +5V 11 10 9 +15V 51
VOUT/VANALOG (dB)
-20 0 100 1K 10K 100K 1M 10M FREQUENCY (Hz)
8
C = 1F SOCKET ON COPPER GROUND PLANE JIG
FIGURE 3A. FIGURE 3. "OFF" ISOLATION vs FREQUENCY
2.8 2.6 2.4 2.2 2.0 1.8 I (mA) 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 1 10 IGND I- SUPPLY I+ SUPPLY 1 2 3 4 5 6 7 8 IL < 0.05mA FROM 1s to DC
FIGURE 3B.
16 15 14 -15V 13 12 +5V 11 +15V 10 9 +10V 100
+3V
0V
= 400ns
- PERIOD OF PULSE REPETITION RATE (s)
FIGURE 4A.
100
1000
FIGURE 4B.
FIGURE 4. POWER SUPPLY CURRENTS vs LOGIC STROBE RATE
13-7
IH5140 thru IH5145 Typical Performance Curves
NC CHANNEL PINS (3, 4) +10 +5 VINJECT (mVP-P) CHARGE (pC) 0 -5 +100
(Continued)
VINJECT 0.01F 1 2 VA 3 0.01F 4 IH5143 5 6 7 8 12 +5V 11 +15V 10 9 16 V A 15 14 -15V 13
+3V 0V 4s
-10 NC CHANNEL PINS (1, 16)
-100
+VINJECT +VINJECT 0mV -VINJECT 0mV
-10
-5
0
+5
+10 -VINJECT
ANALOG SIGNAL VOLTAGE (V)
FIGURE 5A. FIGURE 5. CHARGE INJECTION vs ANALOG SIGNAL
VOUT (OFF CHANNEL) 1 51 2 3 -80 -60 -40 (ON CHANNEL) -20 0 100 4 5 6 7 8
FIGURE 5B.
-120 VOUT/VANALOG (dB) -100
COAX TO SCOPE
16 15 C 14 -15V 13 C C C 12 +5V 11 +15V 10 +5V 9 10VP-P AT FREQUENCY = VANALOG 51
1K
10K
100M
1M
10M
1k C = 1F COPPER GROUND PLANE JIG
FREQUENCY (Hz)
FIGURE 6A.
FIGURE 6B.
FIGURE 6. CHANNEL TO CHANNEL CROSS COUPLING REJECTION vs FREQUENCY
Test Circuits and Waveforms
VOUT A 1 10pF 1k 2 3 4 IH5141 5 6 VOUT B 7 8 10pF 1k 16 10V 15 14 -15V 13 12 +5V +15V 11 10 9 10V 0V TTL INPUT +3V
FIGURE 7. IH5141 tON AND tOFF (3V DIGITAL INPUT)
13-8
IH5140 thru IH5145 Test Circuits and Waveforms
VOUT A 1 10pF 1k 2 3 4 IH5141 5 6 VOUT B 7 8 10pF 1k 12 +15V 11 +15V 10 9 -10V 0V tON TTL INPUT 16 +10V 15 14 13 -15V 0V 1N914 +15V 0V LOGIC INPUT +15V TTL INPUT 0V
(Continued)
tON
tOFF VOUT
+10V
0V -10V VOUT tOFF
NOTE: Switching times are measured at 90% points. FIGURE 8. IH5141 tON AND tOFF (15V DIGITAL INPUT)
1 2 10pF 1k -10V -10V VOUT B 3 4 IH5143 5 6 7 10pF 1k 8
16 +10V 15 14 -15V 13 12 11 10 9 +10V 0V +15V 0V -10V TTL INPUT +15V T2L INPUT +15V tON tOFF +10V 90% VOUT A OR B 10%
FIGURE 9A. FIGURE 9. IH5143 tON AND tOFF (15V DIGITAL INPUT)
FIGURE 9B.
VOUT A 1 10pF 1k 2 3 +10V 4 IH5143 5 6 VOUT B 7 8 10pF 1k 12 +5V 11 +15V 10 9 +10V 16 +10V 15 14 -15V 13 0V TTL INPUT +3V
FIGURE 10. IH5143 tON AND tOFF (3V DIGITAL INPUT)
13-9
IH5140 thru IH5145 Typical Applications
To maximize switching speed on the IH5140 family, TTL open collector logic (15V with a 1k or less collector resistor) should be used. This configuration will result in (SPST) tON and tOFF times of 80ns and 50ns, for signals between -10V and +10V. The SPDT and DPST switches are approximately 30ns slower in both tON and tOFF with the same drive configuration. 15V CMOS logic levels can be used (0V to +15V), but propagation delays in the CMOS logic will slow down the switching (typical 50ns 100ns delays). When driving the IH5140 Family from either +5V TTL or CMOS logic, switching times run 20ns slower than if they were driven from +15V logic levels. Thus tON is about 105ns, and tOFF 75ns for SPST switches, and 135ns and 105ns (tON, tOFF) for SPDT or DPST switches. The low level drive can be made as fast as the high level drive if 5V strobe levels are used instead of the usual 0V +3.0V drive. Pin 13 is taken to -5V instead of the usual GND and strobe input is taken from +5V to -5V levels as shown in Figure 11.
15V FROM DRIVERS Q1 G S B D B ANALOG IN
D SUBSTRATE D S G Q3 S
Q2 G
15V FROM DRIVERS
-15V ANALOG OUT
"BODY PULLER" FET
FIGURE 12.
Current will flow from -10V analog voltage through the drain to body junction of Q1, then through the drain to body junction of Q3 to GND. This means that there is 10V across two forward-biased silicon diodes and current will go to whatever value the input signal source is capable of supplying. If the analog input signal is derived from the same supplies as the switch this fault condition cannot occur. Turning off the supplies would turn off the analog signal at the same time.
ANALOG IN = -10V
ANALOG OUT
1 2 3 4 IH5141 5 6 7
16 ANALOG IN (CHANNEL A) 15 14 -15V 13 -5V 12 +5V 11 +15V 10 9 ANALOG IN (CHANNEL B) -5V +5V N CMOS LEVEL INPUT STROBE GND WHEN POWER SUPPLIES ARE OFF Q1 N
P P N N
Q2 SUBSTRATE
Q3
ANALOG OUT
8
GND WHEN POWER SUPPLIES ARE OFF
FIGURE 11.
FIGURE 13.
The typical channel of the IH5140 family consists of both P-Channel and N-channel MOSFETs. The N-channel MOSFET uses a "Body Puller" FET to drive the body to -15V (15V supplies) to get good breakdown voltages when the switch is in the off state (see Figure 12). This "Body Puller" FET also allows the N-Channel body to electrically float when the switch is in the on state producing a fairly constant rDS(ON) with different signal voltages. While this "Body Puller" FET improves switch performance, it can cause a problem when analog input signals are present (negative signals only) and power supplies are off. This fault condition is shown in Figure 13.
This fault situation can also be eliminated by placing a diode in series with the negative supply line (pin 14) as shown in Figure 14. Now when the power supplies are off and a negative input signal is present this diode is reverse biased and no current can flow.
OUTA 1 2 3 4 IH5141 5 6 7 OUTB 8 12 +5V 11 +15V 10 T2LBIN 9 INB 16 INA 15 T2LAIN 14 13
1N914 OR EQUIVALENT -15V
FIGURE 14.
13-10
IH5140 thru IH5145 Typical Switching Waveforms
Scale: Vertical = 5V/Div., Horizontal = 100ns/Div.
FIGURE 15A. -55oC
FIGURE 15B. 25oC
FIGURE 15C. 125oC NOTE: Corresponds to Figure 12 FIGURE 15. TTL OPEN COLLECTOR LOGIC DRIVE
FIGURE 16A. -55oC
FIGURE 16B. 25oC
13-11
IH5140 thru IH5145 Typical Switching Waveforms
Scale: Vertical = 5V/Div., Horizontal = 100ns/Div. (Continued)
FIGURE 16C. 125oC NOTE: Corresponds to Figure 13 FIGURE 16. TTL OPEN COLLECTOR LOGIC DRIVE
NOTE: Corresponds to Figure 14 FIGURE 17. 25oC TTL OPEN COLLECTOR LOGIC DRIVE
NOTE: Corresponds to Figure 19 FIGURE 18. 25oC TTL OPEN COLLECTOR LOGIC DRIVE
Typical Applications
+15V 2 2 ANALOG INPUT 3 7 741HS 4 -15V 6 1 2 3 4 5 6 7 8 IH5143 16 15 14 13 12 11 10 9 +3V = > SAMPLE MODE 0V = > HOLD MODE +5V +15V LOGIC INPUT -15V 51 3 8007 4 -15V 10,000pF POLYSTYRENE +15V 7 6 OUTPUT
FIGURE 19. FIGURE 19. IMPROVED SAMPLE AND HOLD USING IH5143
13-12
IH5140 thru IH5145 Typical Applications
(Continued)
1 2 3 4 -VANALOG 16 15 14 13 12 11 10 9 IH5143 R ETC. 0V = > HOLD MODE +VANALOG T2L LOGIC STROBE +5V +15V -15V T2L LOGIC STROBE
+VANALOG
EXAMPLE: If -VANALOG = -10VDC and +VANALOG = +10VDC then Ladder Legs are switched between 10VDC , depending upon state of Logic Strobe.
5 6 7 8
2R R ETC. R
2R
FIGURE 20. USING THE CMOS SWITCH TO DRIVE AN R/2R LADDER NETWORK (2 LEGS)
100k HI PASS OUTPUT
100k
10,000pF C BANDPASS OUTPUT
10,000pF C
SIGNAL INPUT 100k 8021 + 3M 100k
8021 + 3M 100k 680k R
8021 + 3M LO PASS OUTPUT
1k
68k R
68k R
Constant gain, constant Q, variable frequency filter which provides simultaneous Lowpass, Bandpass, and Highpass outputs. With the component values shown, center frequency will be 235Hz and 23.5Hz for high and low logic inputs respectively, Q = 100, and Gain = 100. 1 f N = Center Frequency = ----------------2 RC
680k R
IH5143
3V 0V LOGIC STROBE
FIGURE 21. DIGITALLY TUNED LOW POWER ACTIVE FILTER
13-13

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