Maxim MAX9107ESA 25ns, dual/quad/single, low-power, ttl comparator Datasheet

19-2045; Rev. 0; 5/01
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
Features
♦ 25ns Propagation Delay
♦ 350µA (1.75mW) Supply Current Per Comparator
♦ Single 4.5V to 5.5V Supply Operation
♦ Wide Input Range Includes Ground
♦ Low 500µV Offset Voltage
♦ Internal Hysteresis Provides Clean Switching
(2mV)
♦ TTL-Compatible Outputs
♦ Internal Latch (MAX9109 only)
♦ No Phase Reversal for Overdriven Inputs
♦ Space-Saving Packages:
6-Pin SC70 (MAX9109)
8-Pin SOT23 (MAX9107)
14-Pin TSSOP (MAX9108)
The dual MAX9107 is available in both 8-pin SO and
SOT23 packages. The quad MAX9108 is available in
14-pin TSSOP and SO packages while the single
MAX9109 is available in an ultra-small 6-pin SC70
package, a space-saving 6-pin SOT23 package and
an 8-pin SO package.
Ordering Information
Applications
PART
TEMP. RANGE
PINPACKAGE
TOP
MARK
MAX9107EKA-T
-40°C to +85°C
8 SOT23-8
AAIB
MAX9107ESA
-40°C to +85°C
8 SO
—
-40°C to +85°C
14 TSSOP
—
Battery-Powered Systems
A/D Converters
Threshold Detectors/
Discriminators
MAX9108EUD
MAX9108ESD
-40°C to +85°C
14 SO
Line Receivers
Sampling Circuits
Zero-Crossing Detectors
MAX9109EXT-T
-40°C to +85°C
6 SC70-6
MAX9109EUT-T
-40°C to +85°C
6 SOT23-6
MAX9109ESA
-40°C to +85°C
8 SO
—
AAU
AARU
—
Pin Configurations
TOP VIEW
8 VCC
OUTA 1
OUTA
1
INA-
2
7 OUTB INA- 2
INA+
3
6 INB-
GND
MAX9107
5 INB+
4
14 OUTD
D
A
12 IND+
VCC 4
11 GND
INB+ 5
SOT23/SO
10 INC+
B
MAX9109
6 VCC
13 IND-
INA+ 3
MAX9108
OUT 1
C
INB- 6
9 INC-
OUTB 7
8 OUTC
GND 2
5 LE
IN+ 3
4 IN-
8 N.C.
VCC
1
IN+
2
7 OUT
IN-
3
6 GND
N.C.
4
5 LE
MAX9109
SO
SC70/SOT23
TSSOP/SO
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX9107/MAX9108/MAX9109
General Description
The MAX9107/MAX9108/MAX9109 dual/quad/single,
high-speed, low-power voltage comparators are
designed for use in systems powered from a single
+5V supply. Their 25ns propagation delay (with 10mV
input overdrive) is achieved with a power consumption
of only 1.75mW per comparator. The wide input common-mode range extends from 200mV below ground
to within 1.5V of the positive supply rail.
The MAX9107/MAX9108/MAX9109 outputs are TTLcompatible, requiring no external pullup circuitry.
These easy-to-use comparators incorporate internal
hysteresis to ensure clean output switching even when
the devices are driven by a slow-moving input signal.
The MAX9107/MAX9108/MAX9109 are higher-speed,
lower-power, lower-cost upgrades to industry-standard
comparators MAX907/MAX908/MAX909. The MAX9109
features an output latch but does not have complementary outputs.
MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
ABSOLUTE MAXIMUM RATINGS
Power-Supply Ranges
Supply Voltage (VCC to GND) ..............................................6V
Differential Input Voltage ........................-0.3V to (VCC + 0.3V)
Common-Mode Input Voltage to GND ...-0.3V to (VCC + 0.3V)
Latch-Enable Input Voltage
(MAX9109 only) ...................................-0.3V to (VCC + 0.3V)
Output Short-Circuit Duration to VCC or GND ........................10s
Continuous Power Dissipation (TA = +70°C)
6-Pin SC70 (derate 3.1mW/°C above +70°C) ..............245mW
6-Pin SOT23 (derate 8.7mW/°C above +70°C)............696mW
8-Pin SOT23 (derate 9.1mW/°C above +70°C)............727mW
8-Pin SO (derate 5.9mW/°C above +70°C)..................470mW
14-Pin TSSOP (derate 9.1mW/°C above +70°C) .........727mW
14-Pin SO (derate 8.33mW/°C above +70°C)..............666mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = +5V, VCM = 0, VLE = 0 (MAX9109 only), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
Operating Voltage Range
Input Offset Voltage
Input Hysteresis
SYMBOL
VCC
CONDITIONS
Guaranteed by PSRR
VOS
(Note 2)
VHYST
(Note 3)
MIN
TYP
4.5
TA = +25°C
0.5
MAX
UNITS
5.5
V
1.6
TA = TMIN to TMAX
4.0
2
mV
mV
Input Bias Current
IB
125
350
nA
Input Offset Current
IOS
25
80
nA
Input Voltage Range
VCMR
VCC - 1.5
V
(Note 4)
-0.2
Common-Mode Rejection Ratio
CMRR
VCC = 5.5V (Note 5)
50
1000
µV/V
Power-Supply Rejection Ratio
PSRR
VOH
4.5V ≤ VCC ≤ 5.5V
ISOURCE = 100µA
50
1000
µV/V
Output High Voltage
Output Low Voltage
VOL
Supply Current Per Comparator
ICC
3.0
3.5
ISINK = 3.2mA
0.35
ISINK = 8mA
0.4
VCC = +5.5V, all outputs low
0.35
V
0.6
0.7
V
mA
Output Rise Time
tr
VOUT = 0.4V to 2.4V, CL = 10pF
12
ns
Output Fall Time
tf
VOUT = 2.4V to 0.4V, CL = 10pF
6
ns
2
_______________________________________________________________________________________
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
(VCC = +5V, VCM = 0, VLE = 0 (MAX9109 only), TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
tPD+, tPD-
VIN = 100mV, VOD = 10mV
25
ns
∆tPD
VIN = 100mV, VOD = 10mV
(Note 6)
1
ns
Propagation Delay Skew
tPDskew
VIN = 100mV, VOD = 10mV
(Note 7)
5
ns
Latch Input Voltage High
VIH
(Note 8)
Propagation Delay
Differential Propagation Delay
2.0
V
VIL
(Note 8)
IIH, IIL
(Note 8)
0.4
Latch Setup Time
ts
(Note 8)
2
ns
Latch Hold Time
th
(Note 8)
2
ns
Latch Input Voltage Low
Latch Input Current
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
0.8
V
1
µA
Devices are 100% production tested at TA = +25°C. All temperature limits are guaranteed by design.
Input Offset Voltage is defined as the center of the input-referred hysteresis zone. Specified for VCM = 0. See Figure 1.
Trip Point is defined as the input voltage required to make the comparator output change state. The difference
between upper (VTRIP+) and lower (VTRIP-) trip points is equal to the width of the input-referred hysteresis zone (VHYST).
Specified for an input common-mode voltage (VCM) of 0. See Figure 1.
Inferred from the CMRR test. Note that a correct logic result is obtained at the output, provided that at least one input is
within the VCMR limits. Note also that either or both inputs can be driven to the upper or lower absolute maximum limit without damage to the part.
Tested over the full-input voltage range (VCMR).
Differential Propagation Delay is specified as the difference between any two channels in the MAX9107/MAX9108 (both
outputs making either a low-to-high or a high-to-low transition).
Propagation Delay Skew is specified as the difference between any single channel’s output low-to-high transition (tPD+)
and high-to-low transition (tPD-).
Latch specifications apply to MAX9109 only. See Figure 2.
_______________________________________________________________________________________
3
MAX9107/MAX9108/MAX9109
ELECTRICAL CHARACTERISTICS (continued)
__________________________________________Typical Operating Characteristics
(VCC = 5V, VCM = 0, CL = 15pF, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
(OUTPUTS AT VOH)
0.3
0.2
TA = -55°C
0.3
TA = +25°C
0.2
TA = -55°C
0.1
0.1
0
4.5
5.0
5.5
VCMR-
4.5
5.0
5.5
6.0
-60 -40 -20 0
20 40 60 80 100 120 140
INPUT BIAS CURRENT
vs. TEMPERATURE
TRIP POINT
vs. TEMPERATURE
0
-0.1
-0.2
-0.3
-0.5
-25
0
25
50
75
MAX9107/08/09 toc06
VCM = 0
VTRIP+
1
0
-1
VTRIP-
-2
-50
100
2
VOS (mV)
0.1
200
150
100
50
0
-50
-100
-150
-200
-250
-300
-350
-400
MAX9107/08/09 toc05
MAX9107/08/09 toc04
0.2
INPUT CURRENT (nA)
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
-0.4
-25
0
25
50
75
-60 -40 -20 0
100
20 40 60 80 100 120 140
TEMPERATURE (°C)
TEMPERATURE (°C)
OUTPUT LOW VOLTAGE
vs. SINK CURRENT
OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT
PROPAGATION DELAY
vs. INPUT OVERDRIVE
0.4
4.5
TA = +125°C
4.0
VOH (V)
TA = +25°C
0.3
3.5
TA = +125°C
3.0
0.2
TA = +25°C
0.1
4
6
ISINK (mA)
8
10
12
RS = 10Ω
CLOAD = 15pF
30
tPD+
25
20
tPD-
15
TA = -55°C
2.5
35
PROPAGATION DELAY (ns)
5.0
MAX9107/08/09 toc07
TA = -55°C
MAX9107/08/09 toc08
TEMPERATURE (°C)
0.5
4
1
TEMPERATURE (°C)
0.3
2
2
SUPPLY VOLTAGE (V)
0.4
0
3
SUPPLY VOLTAGE (V)
0.5
-50
VCMR+
-1
4.0
6.0
4
0
0
4.0
INPUT OFFSET VOLTAGE (mV)
MAX9107/08/09 toc02
TA = +125°C
MAX9107/08/09 toc09
TA = +25°C
0.4
5
INPUT VOLTAGE RANGE (V)
0.4
0.5
SUPPLY CURRENT (mA)
TA = +125°C
0.5
SUPPLY CURRENT (mA)
MAX9107/08/09 toc01
0.6
INPUT VOLTAGE RANGE
vs. TEMPERATURE
MAX9107/08/09 toc03
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
(OUTPUTS AT VOL)
VOL (V)
MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
10
2.0
1
10
100
ISOURCE (µA)
1000
10
100
INPUT OVERDRIVE (mV)
________________________________________________________________________________________________
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
PROPAGATION DELAY (tPD+)
INPUT
50mV/div
MAX9107/08/09 toc11
MAX9107/08/09 toc10
PROPAGATION DELAY (tPD-)
INPUT
50mV/div
OVERDRIVE
10mV
OVERDRIVE
10mV
OUTPUT
1V/div
OUTPUT
1V/div
5ns/div
SINUSOID 2MHz RESPONSE
PROPAGATION DELAY
vs. CAPACITIVE LOAD
INPUT
50mV/div
MAX9107/08/09 toc13
40
VOD = 10mV
RS = 10Ω
PROPAGATION DELAY (ns)
MAX9107/08/09 toc12
10ns/div
35
tPD+
30
25
OUTPUT
1V/div
tPD20
50ns/div
0
20
40
60
80
100
CAPACITIVE LOAD (pF)
PROPAGATION DELAY
vs. SOURCE IMPEDANCE
30
tPD+
20
tPD-
100
MAX9107/08/09 toc15
VOD = 10mV
RS = 10Ω
CLOAD = 15pF
VOD = 5mV
CLOAD = 15pF
PROPAGATION DELAY (ns)
PROPAGATION DELAY (ns)
40
MAX9107/08/09 toc14
PROPAGATION DELAY
vs. TEMPERATURE
80
60
40
tPD+
20
0
10
-60 -40 -20 0
20 40 60 80 100 120 140
TEMPERATURE (°C)
10
100
1k
10k
SOURCE IMPEDANCE (Ω)
_________________________________________________________________________________________________
5
MAX9107/MAX9108/MAX9109
____________________________Typical Operating Characteristics (continued)
(VCC = 5V, VCM = 0, CL = 15pF, TA = +25°C, unless otherwise noted.)
MAX9107/MAX9108/MAX9109
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
______________________________________________________________Pin Description
PIN
MAX9109
MAX9107
NAME
SC70/SOT23
SO
1
1
—
—
OUTA
2
2
—
—
INA-
Channel A Inverting Input
3
3
—
—
INA+
Channel A Noninverting Input
7
7
—
—
OUTB
6
6
—
—
INB-
Channel B Inverting Input
5
5
—
—
INB+
Channel B Noninverting Input
—
8
—
—
OUTC
—
9
—
—
INC-
Channel C Inverting Input
—
10
—
—
INC+
Channel C Noninverting Input
—
14
—
—
OUTD
Channel D Output
—
13
—
—
IND-
—
12
—
—
IND+
Channel D Noninverting Input
—
—
1
7
OUT
Output
—
—
3
2
IN+
Noninverting Input
—
—
4
3
IN-
Inverting Input
8
4
6
1
VCC
Positive Supply
4
11
2
6
GND
—
—
5
5
LE
—
—
—
4, 8
N.C.
_______________Detailed Description
Timing
Noise or undesired parasitic AC feedback cause most
high-speed comparators to oscillate in the linear region
(i.e., when the voltage on one input is at or near the
voltage on the other input). The MAX9107/MAX9108/
MAX9109 eliminate this problem by incorporating an
internal hysteresis of 2mV. When the two comparator
input voltages are equal, hysteresis effectively causes
one comparator input voltage to move quickly past the
other, thus taking the input out of the region where
oscillation occurs. Standard comparators require that
hysteresis be added through the use of external resistors. The MAX9107/MAX9108/MAX9109’s fixed internal
hysteresis eliminates these resistors. To increase hysteresis and noise margin even more, add positive feedback with two resistors as a voltage divider from the
output to the noninverting input.
Adding hysteresis to a comparator creates two trip
points: one for the input voltage rising and one for the
6
FUNCTION
MAX9108
Channel A Output
Channel B Output
Channel C Output
Channel D Inverting Input
Ground
Latch Enable. The latch is transparent when LE is low.
No Connection. Not internally connected.
input voltage falling (Figure 1). The difference between
these two input-referred trip points is the hysteresis.
The average of the trip points is the offset voltage.
Figure 1 illustrates the case where IN- is fixed and IN+
is varied. If the inputs were reversed, the figure would
look the same, except the output would be inverted.
The MAX9109 includes an internal latch, allowing the
result of a comparison to be stored. If LE is low, the
latch is transparent (i.e., the comparator operates as
though the latch is not present). The state of the comparator output is latched when LE is high (Figure 2).
Applications Information
Circuit Layout
Because of the MAX9107/MAX9108/MAX9109’s high
gain bandwidth, special precautions must be taken to
realize the full high-speed capability. A printed circuit
board with a good, low-inductance ground plane is
mandatory. Place the decoupling capacitor (a 0.1µF
ceramic capacitor is a good choice) as close to VCC as
_______________________________________________________________________________________
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
VHYST
VTRIP-
LATCH
3V
VIN+
LE
V
+ VTRIPVOS = TRIP+
2
MAX9107/MAX9108/MAX9109
VTRIP+
1.4V
0
COMPARE
ts
th
VIN- = 0
VOD
VOS
VOH
DIFFERENTIAL
INPUT
VOLTAGE
VIN
VOH
COMPARATOR
OUTPUT
tPD+
OUTPUT 1.4V
VOL
Figure 1. Input and Output Waveforms, Noninverting Input
Varied
VOL
Figure 2. MAX9109 Timing Diagram
possible. Pay close attention to the decoupling capacitor’s bandwidth, keeping leads short. Short lead
lengths on the inputs and outputs are also essential to
avoid unwanted parasitic feedback around the comparators. Solder the device directly to the printed circuit
board instead of using a socket.
10pF
1MΩ
+5V
Overdriving the Inputs
The inputs to the MAX9107/MAX9108/MAX9109 may be
driven to the voltage limits given in the Absolute
Maximum Ratings. If the inputs are overdriven, there is
no output phase reversal.
+5V
MAX4400
3
5
4
SIEMENS BP-104
PHOTODIODE 1
0.1µF
3
6
1
2
Battery-Operated Infrared Data Link
In Figure 3, the circuit allows reception of infrared data.
The MAX4400 converts the photodiode current to a
voltage, and the MAX9109 determines whether the
amplifier output is high enough to be called a “1.” The
current consumption of this circuit is minimal: the
MAX4400 and MAX9109 require typically 410µA and
350µA, respectively.
0.1µF
4
5
DATA
2
100kΩ
47kΩ
100kΩ
+5V
MAX9109
1000pF
1000pF
Figure 3. Battery-Operated Infrared Data Link Consumes Only
760µA
Chip Information
MAX9107 TRANSISTOR COUNT: 262
MAX9108 TRANSISTOR COUNT: 536
MAX9109 TRANSISTOR COUNT: 140
PROCESS: Bipolar
_______________________________________________________________________________________
7
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
TSSOP.EPS
SOT23, 8L.EPS
MAX9107/MAX9108/MAX9109
Package Information
8
_______________________________________________________________________________________
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
SC70, 6L.EPS
6LSOT.EPS
_______________________________________________________________________________________
9
MAX9107/MAX9108/MAX9109
Package Information (continued)
25ns, Dual/Quad/Single, Low-Power,
TTL Comparators
SOICN.EPS
MAX9107/MAX9108/MAX9109
Package Information (continued)
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.