SPT9693
WIDE INPUT VOLTAGE, JFET COMPARATOR
TECHNICAL DATA
MARCH 1, 2001
FEATURES
•
•
•
•
•
•
Common mode range –3.0 to +8.0 V
Low input bias current <100 pA
Propagation delay 1.5 ns (max)
Low offset ±25 mV
Low feedthrough and crosstalk
Differential latch control
APPLICATIONS
•
•
•
•
•
•
•
•
Automated test equipment
High-speed instrumentation
Window comparators
High-speed timing
Line receivers
High-speed triggers
Threshold detection
Peak detection
GENERAL DESCRIPTION
The SPT9693 is a high-speed, wide common mode volt-
age, JFET input, dual comparator. It is designed for appli-
cations that measure critical timing parameters in which
wide common mode input voltages of –3.0 to +8.0 V are
required. Propagation delays are constant for overdrives
greater than 50 mV.
JFET inputs reduce the input bias currents to the
nanoamp level, eliminating the need for input drivers and
buffers in most applications. The device has differential
analog inputs and complementary logic outputs com-
patible with ECL systems. Each comparator has a
complementary latch enable control that can be driven by
standard ECL logic.
The SPT9693 is available in 20-contact LCC and 20-lead
PLCC packages over the commercial temperature range.
It is also available in die form.
BLOCK DIAGRAM
Q
A
Q
A
Q
B
Q
B
GND
B
GND
A
LE
A
LE
A
N/C
AV
EE
(A)
LE
B
LE
B
N/C
AV
EE
(B)
AV
CC
(B)
AV
CC
(A) IN
A
+IN
A
+IN
B
IN
B
Signal Processing Technologies, Inc.
4755 Forge Road, Colorado Springs, Colorado 80907, USA
Phone: 719-528-2300
Fax: 719-528-2370
Web Site: http://www.spt.com
e-mail: sales@spt.com
ABSOLUTE MAXIMUM RATINGS (Beyond which damage may occur)
1
25 °C
Supply Voltages (Measured to GND)
Positive Supply Voltage (AV
CC
) ............ –0.5 to +11.0 V
Negative Supply Voltage (AV
EE
) ........... –11.0 to +0.5 V
Input Voltages
Input Common Mode Voltage ................ –6 to +AV
CC
+1
Differential Input Voltage .................... –12.0 to +12.0 V
Input Voltage, Latch Controls ...................... –6 to 0.5 V
V
IN
to AV
CC
Differential Voltage ............... –16 to +1.0 V
V
IN
to AV
EE
Differential Voltage ............... +4 to +21.0 V
Output
Output Current ................................................... 30 mA
Temperature
Operating Temperature, ambient ................ 0 to +70 °C
junction......................+150 °C
Lead Temperature, (soldering 60 seconds) ..... +300 °C
Storage Temperature ............................ –65 to +150 °C
Note:
1. Operation at any Absolute Maximum Rating is not implied. See
Electrical Specifications for proper nominal applied conditions
in typical applications. Application of multiple maximum rating
conditions at the same time may damage the device.
ELECTRICAL SPECIFICATIONS
T
A
= +25 °C, AV
CC
= +10 V, AV
EE
= –10.0 V, R
L
= 50 Ohm to –2 V, unless otherwise specified.
PARAMETERS
DC CHARACTERISTICS
Input Offset Voltage
Offset Voltage Tempco
Input Bias Current
Input Bias Current
Input Offset Current
Positive Supply Current (Dual)
Negative Supply Current (Dual)
Positive Supply Voltage, AV
CC
Negative Supply Voltage, AV
EE
Input Common Mode Range
Latch Enable
Common Mode Range
Differential Voltage Range
Open Loop Gain
Differential Input Resistance
Input Capacitance
Power Supply Sensitivity
Common Mode Rejection Ratio
Power Dissipation
Output High Level
Output Low Level
TEST
CONDITIONS
V
IN
(Common Mode) = 0
T
MIN
<T
A
<T
MAX
T
MIN
<T
A
<T
MAX
V
IN
(Common Mode) = –3 to +7 V
T
MIN
<T
A
<T
MAX
V
IN
(Common Mode) = +7 to +8 V
T
MIN
<T
A
<T
MAX
AV
CC
=10 V
AV
EE
=–10.0 V
TEST
LEVEL
I
IV
V
I
I
V
V
I
I
IV
IV
I
IV
I
V
V
V
V
I
IV
I
I
I
MIN
–25
–25
TYP
0.0
0.0
50
±10
±50
±1.0
±10
3
40
10.0
–10.0
MAX
+25
+25
±100
±150
UNITS
mV
mV
µV/°C
nA
nA
nA
nA
mA
mA
V
V
V
V
V
dB
GΩ
pF
dB
dB
dB
mW
V
V
9.75
–9.75
–3.0
–2.0
6
55
10.25
–10.25
+8.0
0
±10
T
MIN
<T
A
<T
MAX
Dual
ECL 50 Ohms to –2 V
ECL 50 Ohms to –2 V
50
45
–.98
–1.95
52
2
1.0
60
60
55
430
610
–.70
–1.65
SPT
SPT9693
2
3/1/01
ELECTRICAL SPECIFICATIONS
T
A
= +25 °C, AV
CC
= +10 V, AV
EE
= –10.0 V, R
L
= 50 Ohm to –2 V, unless otherwise specified.
PARAMETERS
AC ELECTRICAL PARAMETERS
Propagation Delay
1
Propagation Delay Tempco
Propagation Delay Skew (A vs B)
Delay Dispersion from
Input Direction
Delay Dispersion from
Input Common Mode
Latch Set-up Time
Latch to Output Delay
Latch Pulse Width
Latch Hold Time
Rise Time
Fall Time
Slew Rate
TEST
CONDITIONS
50 mV O.D., Slew 10 V/ns
TEST
LEVEL
IV
V
V
V
V
V
V
V
V
V
V
V
MIN
.75
TYP
1.25
2
100
50
60
500
500
500
0
0.45
0.45
5
MAX
1.50
UNITS
ns
ps/ °C
ps
ps
ps
ps
ps
ps
ps
ns
ns
V/ns
50 mV O.D.
20% to 80%
20% to 80%
1
Valid for both high-to-low and low-to-high transitions
TEST LEVEL CODES
All electrical characteristics are subject to the
following conditions:
All parameters having min/max specifications
are guaranteed. The Test Level column indi-
cates the specific device testing actually per-
formed during production and Quality Assur-
ance inspection. Any blank section in the data
column indicates that the specification is not
tested at the specified condition.
LEVEL
I
II
III
IV
V
VI
TEST PROCEDURE
100% production tested at the specified temperature.
100% production tested at T
A
= +25 °C, and sample tested at the
specified temperatures.
QA sample tested only at the specified temperatures.
Parameter is guaranteed (but not tested) by design and characteri-
zation data.
Parameter is a typical value for information purposes only.
100% production tested at T
A
= +25 °C. Parameter is guaranteed
over specified temperature range.
SPT
SPT9693
3
3/1/01
TYPICAL PERFORMANCE CHARACTERISTICS
INPUT OFFSET VOLTAGE vs COMMON MODE VOLTAGE
(T=+25 °C)
+10.0
100
INPUT BIAS CURRENT vs COMMON MODE VOLTAGE
(+25 °C)
+6.0
10
INPUT OFFSET VOLTAGE (mV)
+2.0
INPUT BIAS CURRENT (nA)
1.6
+0.8
+3.2
+5.6
+8.0
1.0
2.0
0.1
6.0
0.01
10.0
3.0
0.001
3.0
1.6
+0.8
+3.2
+5.6
+8.0
COMMON MODE VOLTAGE (V)
COMMON MODE VOLTAGE (V)
PROPAGATION DELAY TIME vs TEMPERATURE
DELAY DISPERSION vs INPUT PULSE WIDTH
1600
PROPAGATION DELAY TIME (ps)
50
Slope 2 ps/ °C
DELAY DISPERSION (ps)
1500
40
1400
30
1300
20
1200
10
0
+25
+50
+75
+100
+125
+150
0
500
1000
1500
2000
2500
3000
TEMPERATURE (°C)
INPUT PULSE WIDTH (ps)
SPT
SPT9693
4
3/1/01
TYPICAL PERFORMANCE CHARACTERISTICS
HYSTERESIS vs
DLATCH
VOLTAGE
V Hysteresis (mV)
.90
RISE AND FALL OF OUTPUTS vs TIME CROSSOVER
50
1.10
HYSTERESIS (mV)
OUTPUT RISE & FALL (V)
40
1.30
30
20
1.50
10
VLEVLE
(mV)
1.70
30
20
10
0
10
20
30
1.90
1.1
1.5
1.9
2.3
2.7
3.5
TIME (ns)
PROPAGATION DELAY vs INPUT
OVERDRIVE VOLTAGE
PROPAGATION DELAY vs
COMMON MODE INPUT VOLTAGE
1500
PROPAGATION DELAY TIME (ps)
Input Slew Rates
= 2 V/ns
= 5 V/ns
PROPAGATION DELAY TIME (ps)
1600
= 1 V/ns
1400
1500
1300
1400
1200
1300
1100
1200
50
100
150
200
V
OD
(mV)
250
300
350
400
4
2
0
+2
V
IN
, cm (V)
+4
+6
+8
SPT
SPT9693
5
3/1/01
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