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LTC1409CSW#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
1
LTC1409
12-Bit, 800ksps Sampling
A/D Converter with Shutdown
S
F
EA
T
U
RE
D
U
ESCRIPTIO
The LTC
®
1409 is a 1µs, 800ksps, sampling 12-bit A/D
converter that draws only 80mW from ±5V supplies. This
easy-to-use device includes a high dynamic range sample-
and-hold and a precision reference. Two digitally selectable
power Shutdown modes provide flexibility for low power
systems.
The LTC1409 full-scale input range is ±2.5V. Maximum
DC specs include ±1LSB INL and ±1LSB DNL over tem-
perature. Outstanding AC performance includes 72.5dB
S/(N + D) at the Nyquist input frequency of 400kHz.
The unique differential input sample-and-hold can acquire
single-ended or differential input signals up to its 20MHz
bandwidth. The 60dB common mode rejection allows
users to eliminate ground loops and common mode noise
by measuring signals differentially from the source.
The ADC has a µP compatible, 12-bit parallel output port.
There is no pipeline delay in the conversion results.
A separate convert start input and a data ready signal
(BUSY) ease connections to FIFOs, DSPs and micropro-
cessors. A digital output driver power supply pin allows
direct connection to 3V logic.
■
Sample Rate: 800ksps
■
Power Dissipation: 80mW
■
72.5dB S/(N + D) and 86dB THD at Nyquist
■
No Pipeline Delay
■
Nap (4mW) and Sleep (10µW) Shutdown Modes
■
Operates with Internal 15ppm/°C Reference
or External Reference
■
True Differential Inputs Reject Common Mode Noise
■
20MHz Full Power Bandwidth Sampling
■
±2.5V Bipolar Input Range
■
28-Pin SO Wide and SSOP Package
U
S
A
O
PP
L
IC
AT
I
■
Telecommunications
■
Digital Signal Processing
■
Multiplexed Data Acquisition Systems
■
High Speed Data Acquisition
■
Spectrum Analysis
■
Imaging Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
U
A
O
PP
L
IC
AT
ITY
P
I
CA
L
800kHz, 12-Bit Sampling A/D Converter
Effective Bits and Signal-to-(Noise + Distortion)
vs Input Frequency
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
+A
IN
–A
IN
V
REF
REFCOMP
AGND
D11(MSB)
D10
D9
D8
D7
D6
D5
D4
DGND
AV
DD
OV
DD
V
SS
BUSY
CS
CONVST
RD
SHDN
NAP/SLP
OGND
D0
D1
D2
D3
LTC1409
10µF
DIFFERENTIAL
ANALOG INPUT
(–2.5V TO 2.5V)
2.50V
V
REF
OUTPUT
10µF
10µF
–5V
5V
12-BIT
PARALLEL
BUS
µP CONTROL
LINES
LTC1409 • TA01
INPUT FREQUENCY (Hz)
2
EFFECTIVE BITS
S/(N + D) (dB)
4
6
8
10
10k 100k 1M 10M
LTC1409 • TA02
0
1k
12 74
68
62
56
50
NYQUIST
FREQUENCY
f
SAMPLE
= 800ksps
2
LTC1409
AV
DD
= OV
DD
= V
DD
(Notes 1, 2)
Supply Voltage (V
DD
)................................................ 6V
Negative Supply Voltage (V
SS
)................................ –6V
Total Supply Voltage (V
DD
to V
SS
) .......................... 12V
Analog Input Voltage
(Note 3) .................................. V
SS
– 0.3V to V
DD
+ 0.3V
Digital Input Voltage (Note 4) ............ V
SS
– 0.3V to 10V
Digital Output Voltage............. V
SS
– 0.3V to V
DD
+ 0.3V
Power Dissipation............................................. 500mW
Operating Temperature Range
LTC1409C............................................... 0°C to 70°C
LTC1409I........................................... –40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
A
U
G
W
A
W
U
W
ARB
S
O
LU
T
EXI T
I
S
WU
U
PACKAGE
/
O
RDER I FOR ATIO
Consult factory for Military grade parts.
ORDER
PART NUMBER
LTC1409CG
LTC1409CSW
LTC1409IG
LTC1409ISW
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) ● 12 Bits
Integral Linearity Error (Note 7) ● ±0.3 ±1 LSB
Differential Linearity Error ● ±0.3 ±1 LSB
Offset Error (Note 8) ±2 ±6 LSB
● ±8 LSB
Full-Scale Error ±15 LSB
Full-Scale Tempco I
OUT(REF)
= 0 ● ±15 ppm/°C
CCHARA TERIST
ICS
CO
U
VERTER
With Internal Reference (Notes 5, 6)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Analog Input Range (Note 9) 4.75V ≤ V
DD
≤ 5.25V, –5.25V ≤ V
SS
≤ –4.75V ● ±2.5 V
I
IN
Analog Input Leakage Current CS = High ● ±1 µA
C
IN
Analog Input Capacitance Between Conversions 17 pF
During Conversions 5 pF
t
ACQ
Sample-and-Hold Acquisition Time ● 50 150 ns
t
AP
Sample-and-Hold Aperture Delay Time –1.5 ns
t
jitter
Sample-and-Hold Aperture Delay Time Jitter 5 ps
RMS
CMRR Analog Input Common Mode Rejection Ratio –2.5V < (–A
IN
= +A
IN
) < 2.5V 60 dB
(Note 5)
PUT
U
IA
A
U
LOG
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
+A
IN
–A
IN
V
REF
REFCOMP
AGND
D11(MSB)
D10
D9
D8
D7
D6
D5
D4
DGND
AV
DD
OV
DD
V
SS
BUSY
CS
CONVST
RD
SHDN
NAP/SLP
OGND
D0
D1
D2
D3
SW PACKAGE
28-LEAD PLASTIC SO WIDE
G PACKAGE
28-LEAD PLASTIC SO
TOP VIEW
T
JMAX
= 110°C, θ
JA
= 95°C/W (G)
T
JMAX
= 110°C, θ
JA
= 130°C/W (SW)
3
LTC1409
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
S/(N + D) Signal-to-Noise Plus Distortion Ratio 100kHz Input Signal (Note 12) ● 70 73.0 dB
400kHz Input Signal (Note 12)
● 68 72.5 dB
THD Total Harmonic Distortion 100kHz Input Signal, First Five Harmonics –90 dB
400kHz Input Signal, First Five Harmonics ● –86 –74 dB
Peak Harmonic or Spurious Noise 400kHz Input Signal ● –90 –74 dB
IMD Intermodulation Distortion f
IN1
= 29.37kHz, f
IN2
= 32.446kHz –84 dB
Full Power Bandwidth 15 MHz
Full Linear Bandwidth S/(N + D) ≥ 68dB 1.6 MHz
(Note 5)
ACCURACY
IC
DY
U
W
A
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
REF
Output Voltage I
OUT
= 0 2.480 2.500 2.520 V
V
REF
Output Tempco I
OUT
= 0 ±15 ppm/°C
V
REF
Line Regulation 4.75V ≤ V
DD
≤ 5.25V 0.01 LSB/V
–5.25V ≤ V
SS
≤ –4.75V 0.01 LSB/V
V
REF
Output Resistance –0.1mA ≤ |I
OUT
| ≤ 0.1mA 4 kΩ
REFCOMP Output Voltage I
OUT
= 0 4.06 V
(Note 5)
I TER AL REFERE CE CHARACTERISTICS
U
UU
(Note 5)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage V
DD
= 5.25V ● 2.4 V
V
IL
Low Level Input Voltage V
DD
= 4.75V ● 0.8 V
I
IN
Digital Input Current V
IN
= 0V to V
DD
● ±10 µA
C
IN
Digital Input Capacitance 5pF
V
OH
High Level Output Voltage V
DD
= 4.75V
I
O
= –10µA 4.5 V
I
O
= –200µA ● 4.0 V
V
OL
Low Level Output Voltage V
DD
= 4.75V
I
O
= 160µA 0.05 V
I
O
= 1.6mA ● 0.10 0.4 V
I
OZ
High-Z Output Leakage D11 to D0 V
OUT
= 0V to V
DD
, CS High ● ±10 µA
C
OZ
High-Z Output Capacitance D11 to D0 CS High (Note 9 ) ● 15 pF
I
SOURCE
Output Source Current V
OUT
= 0V –10 mA
I
SINK
Output Sink Current V
OUT
= V
DD
10 mA
(Note 5)
DIGITAL I PUTS A D DIGITAL OUTPUTS
U
U
POWER REQUIRE E TS
W
U
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
DD
Positive Supply Voltage (Notes 10, 11) 4.75 5.25 V
V
SS
Negative Supply Voltage (Note 10) –4.75 –5.25 V
I
DD
Positive Supply Current CS High ● 6.0 9.0 mA
Nap Mode CONVST = CS = RD = SHDN = 0V, NAP/SLP = 5V 0.8 1.2 mA
Sleep Mode CONVST = CS = RD = SHDN = 0V, NAP/SLP = 0V 1.0 µA
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LTC1409CSW#TRPBF

Mfr. #:
Buy LTC1409CSW#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC 12-bit, 800ksps SAR ADC with +/-2.5V Input
Lifecycle:
New from this manufacturer.
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