Power Dissipation .............................................. 500mW
Specified Temperature Range (Note 14)....... 0°C to 70°C
Operating Temperature Range
LTC1282AC, LTC1282BC .......................... 0°C to 70°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
D5 10
D4 11
DGND 12
SW PACKAGE
24-LEAD PLASTIC SO WIDE
T
JMAX
= 110°C,
θ
JA
= 130°C/W
ORDER INFORMATION
LEAD FREE FINISH
LTC1282ACSW#PBF
LTC1282BCSW#PBF
TAPE AND REEL
LTC1282ACSW#TRPBF
LTC1282BCSW#TRPBF
PART MARKING*
LTC1282ACSW
LTC1282BCSW
PACKAGE DESCRIPTION
24-Lead Plastic SO Wide
24-Lead Plastic SO Wide
TEMPERATURE RANGE
0°C to 70°C
0°C to 70°C
Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Tape and reel specifications.
Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
CONVERTER CHARACTERISTICS
PARAMETER
Resolution (No Missing Codes)
Integral Linearity Error
(Note 7)
Commercial
Military
Commercial
Military
(Note 8)
CONDITIONS
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. With Internal Reference (Notes 5 and 6)
LTC1282A
MIN
l
l
l
l
l
l
LTC1282B
MAX
±1/2
±1/2
±3/4
±3/4
±1
±3
±4
±10
MIN
12
±1
±1
±1
±1
±1
±4
±6
±15
±10
±0.3
±0.1
±45
TYP
MAX
UNITS
Bits
LSB
LSB
LSB
LSB
LSB
LSB
LSB
LSB
ppm/°C
LSB
LSB
TYP
12
Differential Linearity Error
Offset Error
Gain Error
Gain Error Tempco
Power Supply Rejection
I
OUT(REF)
= 0
(Note 9) V
DD
±10%
(Note 10) V
SS
±10%
l
±5
±0.3
±0.1
±25
Rev. B
2
For more information
www.analog.com
LTC1282
DYNAMIC ACCURACY
SYMBOL
S/(N + D)
THD
IMD
PARAMETER
Signal-to-Noise Plus Distortion Ratio
Total Harmonic Distortion
Peak Harmonic or Spurious Noise
Intermodulation Distortion
Full Power Bandwidth
Full Linear Bandwidth (S/(N + D) ≥ 68dB)
(Note 5)
LTC1282A/LTC1282B
CONDITIONS
10kHz/70kHz Input Signal
10kHz/70kHz Input Signal, Up to 5th Harmonic
10kHz/70kHz Input Signal
f
IN1
= 19.0kHz, f
IN2
= 20.6kHz
MIN
TYP
71/69
–82/–77
–82/–77
–78
4
200
MAX
UNITS
dB
dB
dB
dB
MHz
kHz
ANALOG INPUT
SYMBOL PARAMETER
V
IN
I
IN
C
IN
t
ACQ
(Note 5)
CONDITIONS
2.7V ≤ V
DD
≤ 3.6V (Unipolar Mode)
3V ≤ V
DD
≤ 3.6V, –3.3V ≤ V
SS
≤ –2.5V (Bipolar Mode)
CS
= High
Between Conversions (Sample Mode)
During Conversions (Hold Mode)
Commercial
Military
l
l
l
MIN
TYP
0 to 2.5
±1.25
MAX
UNITS
V
V
Analog Input Range (Note 11)
Analog Input Leakage Current
Analog Input Capacitance
Sample-and-Hold
Acquisition Time
±1
63
5
0.45
1.14
1.5
µA
pF
pF
µs
µs
The
l
denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 5)
PARAMETER
V
REF
Output Voltage
V
REF
Output Tempco
V
REF
Line Regulation
V
REF
Load Regulation
CONDITIONS
I
OUT
= 0
I
OUT
= 0
2.7V ≤ V
DD
≤ 3.6V
–3.6V ≤ V
SS
≤ –2.7V
0V ≤ |I
OUT
| ≤ 1mA
l
INTERNAL REFERENCE CHARACTERISTICS
MIN
1.1900
TYP
1.200
±5
0.55
0.02
3
MAX
1.210
±25
MIN
1.190
TYP
1.200
±10
0.55
0.02
3
MAX
1.210
±45
UNITS
V
ppm/°C
LSB/V
LSB/V
LSB/mA
The
l
denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 5)
SYMBOL
V
IH
V
IL
I
IN
C
IN
V
OH
V
OL
I
OZ
C
OZ
I
SOURCE
I
SINK
PARAMETER
High Level Input Voltage
Low Level Input Voltage
Digital Input Current
Digital Input Capacitance
High Level Output Voltage
V
DD
= 2.7V
I
O
= –10µA
I
O
= –200µA
V
DD
= 2.7V
I
O
= 160µA
I
O
= 1.6mA
V
OUT
= 0V to V
DD
,
CS
High
CS
High (Note 12 )
V
OUT
= 0V
V
OUT
= V
DD
CONDITIONS
V
DD
= 3.6V
V
DD
= 2.7V
V
IN
= 0V to V
DD
l
l
l
DIGITAL INPUTS AND DIGITAL OUTPUTS
MIN
1.9
TYP
MAX
0.45
±10
UNITS
V
V
µA
pF
V
V
V
V
µA
pF
mA
mA
Rev. B
5
2.6
l
2.3
Low Level Output Voltage
l
l
l
0.05
0.10
0.4
±10
15
High Z Output Leakage D11-D0/8
High Z Output Capacitance D11-D0/8
Output Source Current
Output Sink Current
–4.5
4.5
For more information
www.analog.com
3
LTC1282
POWER REQUIREMENTS
SYMBOL
V
DD
V
SS
I
DD
I
SS
P
D
PARAMETER
Positive Supply Voltage
Negative Supply Voltage
Positive Supply Current
Negative Supply Current
Power Dissipation
The
l
denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Note 5)
CONDITIONS
Unipolar Mode (Note 13)
Bipolar Mode (Note 13)
Bipolar Operation (Note 13)
f
SAMPLE
= 140ksps
f
SAMPLE
= 140ksps
f
SAMPLE
= 140ksps
l
l
l
MIN
2.7
3.0
–3.6
TYP
MAX
3.6
3.6
–2.5
UNITS
V
V
V
mA
mA
mW
4
0.03
12
7.8
0.15
24
The
l
denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (Notes 1 and 5)
SYMBOL
PARAMETER
CONDITIONS
Commercial (Note 13)
Military (Note 13)
Commercial
Military
C
L
= 50pF
Commercial
Military
C
L
= 20pF (Note 13)
Commercial
Military
C
L
= 100pF (Note 13)
Commercial
Military
t
4
t
5
t
6
t
7
t
8
t
9
t
10
t
11
t
12
RD
Pulse Width
CS
to
RD
Hold Time
Data Setup Time After
BUSY↑
(Note 13)
(Note 13)
(Note 13)
Commercial
Military
(Note 13)
Commercial
Military
(Note 13)
(Note 13)
Commercial (Note 13)
Military (Note 13)
l
l
l
l
l
l
l
TIMING CHARACTERISTICS
MIN
140
120
TYP
MAX
UNITS
kHz
kHz
f
SAMPLE(MAX)
Maximum Sampling Frequency
t
CONV
t
1
t
2
t
3
Conversion Time
CS
to
RD
Setup Time
RD↓
to
BUSY↓
Delay
6.0
6.5
0
140
200
230
260
180
200
220
200
240
260
µs
µs
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Data Access Time After
RD↓
100
l
l
110
l
l
l
l
l
l
l
l
l
l
l
l
l
t
3
0
60
85
110
120
120
130
150
ns
ns
ns
ns
ns
ns
ns
ns
ns
Bus Relinquish Time
40
40
40
0
0
40
1140
1500
60
HBEN to
RD
Setup Time
HBEN to
RD
Hold Time
Delay Between
RD
Operations
Delay Between Conversions
Aperture Delay of Sample-and-Hold
450
30
ns
ns
ns
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
All voltage values are with respect to ground with DGND and
AGND wired together (unless otherwise noted).
Note 3:
When these pin voltages are taken below V
SS
or above V
DD
, they
will be clamped by internal diodes. This product can handle input currents
greater than 60mA below V
SS
or above V
DD
without latchup.
Note 4:
When these pin voltages are taken below V
SS
they will be clamped
by internal diodes. This product can handle input currents greater than
60mA below V
SS
without latchup. These pins are not clamped to V
DD
.
Note 5:
V
DD
= 3V, V
SS
= 0V for unipolar mode and V
SS
= –3V for bipolar
mode, f
SAMPLE
= 140kHz, t
r
= t
f
= 5ns unless otherwise specified.
Note 6:
Linearity, offset and full-scale specifications apply for unipolar and
bipolar modes.
Rev. B
4
For more information
www.analog.com
LTC1282
TIMING CHARACTERISTICS
(Note 5)
mode with input voltage of 0V to 2.5V. When V
SS
is taken negative (i.e.
V
SS
≤ –2.5V), the ADC will convert in bipolar mode with an input voltage of
±1.25V. A
IN
must not exceed V
DD
or fall below V
SS
by more than 50mV for
specified accuracy.
Note 12:
Guaranteed by design, not subject to test.
Note 13:
Recommended operating conditions.
Note 14:
Commercial grade parts are designed to operate over the
temperature range of –40°C to 85°C but are neither tested nor guaranteed
beyond 0°C to 70°C. Industrial grade parts specified and tested over
–40°C to 85°C are available on special request. Consult factory.
Note 7:
Integral nonlinearity is defined as the deviation of a code from a
straight line passing through the actual endpoints of the transfer curve.
The deviation is measured from the center of the quantization band.
Note 8:
Bipolar offset is the different voltage measured from –0.5LSB when
the output code flickers between 0000 0000 0000 and 1111 1111 1111.
Note 9:
Full-scale change when V
SS
= 0V (Unipolar Mode) or –3V
(Bipolar Mode).
Note 10:
Full-scale change when V
DD
= 3V.
Note 11:
The LTC1282 can perform unipolar and bipolar conversions.
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