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LTC1402CGN#TRPBF

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1
LTC1402
Serial 12-Bit, 2.2Msps
Sampling ADC with Shutdown
■
Sample Rate: 2.2Msps
■
72dB S/(N + D) and –89dB THD at Nyquist
■
Power Dissipation: 90mW (Typ)
■
80MHz Full Power Bandwidth Sampling
■
No Missing Codes over Temperature
■
Available in 16-Pin Narrow SSOP Package
■
Single Supply 5V or ±5V Operation
■
Nap Mode with Instant Wake-Up: 15mW
■
Sleep Mode: 10µW
■
True Differential Inputs Reject Common Mode Noise
■
Input Range (1mV/LSB): 0V to 4.096V or ±2.048V
■
Internal Reference Can Be Overdriven Externally
■
3-Wire Interface to DSPs and Processors (SPI and
MICROWIRE
TM
Compatible)
The LTC
®
1402 is a 12-bit, 2.2Msps sampling A/D con-
verter. This high performance device includes a high dy-
namic range sample-and-hold and a precision reference.
It operates from a single 5V supply or dual ±5V supplies
and draws only 90mW from 5V.
The versatile differential input offers a unipolar range of
4.096V and a bipolar range of ±2.048V for dual supply
systems where high performance op amps perform best,
eliminating the need for special translation circuitry.
The high common mode rejection allows users to elimi-
nate ground loops and common mode noise by measuring
signals differentially from the source.
Outstanding AC performance includes 72dB S/(N + D) and
–93dB SFDR at the Nyquist input frequency of 1.1MHz
with dual ±5V supplies and –84dB SFDR with a single 5V
supply.
The LTC1402 has two power saving modes: Nap and
Sleep. Nap mode consumes only 15mW of power and can
wake up and convert immediately. In Sleep mode, it
typically consumes 10µW of power. Upon power-up from
Sleep mode, a reference ready (REFRDY) signal is avail-
able in the serial data word to indicate that the reference
has settled and the chip is ready to convert.
The 3-wire serial port allows compact and efficient data
transfer to a wide range of microprocessors, microcon-
trollers and DSPs. A digital output driver power supply pin
allows direct connection to 3V or lower logic.
SAMPLE-
AND-HOLD
D
OUT
BIP/UNI
CONV
SCK
OV
DD
10
8
16
15
DV
DD
AV
DD
11211
GAIN
7
5
4
3
–5V OR 0V
10µF
10µF
V
REF
4.096V
10µF
64k
OUTPUT
BUFFER
1402 TA01
2.048
REFERENCE
TIMING
LOGIC
A
IN
+
LTC1402
OGND962 DGND
A
IN
–
5V 3V OR 5V
AGND114 13AGND2
+
–
64k
12-BIT ADC
V
SS
MICROWIRE is a trademark of National Semiconductor Corp.
, LTC and LT are registered trademarks of Linear Technology Corporation.
■ Telecommunications
■
High Speed Data and Signal Acquisition
■
Digitally Multiplexed Data Acquisition Systems
■
Digital Radio Receivers
■
Spectrum Analysis
■
Low Power and Battery-Operated Systems
■
Handheld or Portable Instruments
■
Imaging Systems
5 Harmonic THD, 2nd, 3rd and SFDR
vs Input Frequency (Unipolar)
INPUT FREQUENCY (Hz)
10
4
10
5
10
6
10
7
–80
THD, SFDR, 2ND 3RD (dB)
–60
–40
1401 G05
–100
–120
0
–20
–90
–70
–50
–110
–10
–30
THD
SFDR
2ND
3RD
f
SAMPLE
= 2.22MHz
APPLICATIO S
U
DESCRIPTIO
U
FEATURES
BLOCK DIAGRA
W
2
LTC1402
TOP VIEW
GN PACKAGE
16-LEAD NARROW PLASTIC SSOP
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
AV
DD
AGND1
A
IN
+
A
IN
–
V
REF
AGND2
GAIN
BIP/UNI
CONV
SCK
V
SS
DGND
DV
DD
0V
DD
D
OUT
OGND
PACKAGE/ORDER INFORMATION
W
U
U
ABSOLUTE MAXIMUM RATINGS
W
WW
U
AV
DD
= DV
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 (V
DD
+ 0.3V)
Digital Output Voltage......... (V
SS
– 0.3V) to (V
DD
+ 0.3V)
Power Dissipation.............................................. 250mW
Operation Temperature Range
LTC1402C ............................................... 0°C to 70°C
LTC1402I............................................ –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ORDER PART
NUMBER
GN PART MARKING
1402
1402I
Consult factory for Military grade parts.
LTC1402CGN
LTC1402IGN
T
JMAX
= 125°C, θ
JA
= 150°C/W
CONVERTER CHARACTERISTICS
U
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. With internal reference (Note 5).
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) ● 12 Bits
Integral Linearity Error (Note 6) ● ±0.35 ±1LSB
Differential Linearity (Note 6) ● ±0.25 ±1LSB
Offset Error (Note 6) ● ±2 ±10 LSB
Full-Scale Error (Note 6) ● ±10 ±15 LSB
Full-Scale Tempco Internal Reference (Note 6) ±15 ppm/°C
External Reference ±1 ppm/°C
The ● denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C. (Note 5)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Analog Differential Input Range (Notes 3, 11) Bipolar Mode with BIP/UNI High ● ±2.048 V
4.75V ≤ V
DD
≤ 5.25V
–5.25V ≤ V
SS
≤ –4.75V
Unipolar Mode with BIP/UNI Low ● 0 to 4.096 V
4.75V ≤ V
DD
≤ 5.25V
–5.25V ≤ V
SS
≤ 0V
V
CM
Analog Common Mode + Differential Dual ±5V Supply –2.5 to 5 V
Input Range (Note 12) Single 5V Supply 0 to 5 V
I
IN
Analog Input Leakage Current ● 1 µA
C
IN
Analog Input Capacitance 10 pF
t
ACQ
Sample-and-Hold Acquisition Time (Note 9) ● 57 ns
t
AP
Sample-and-Hold Aperture Delay Time 2.6 ns
t
JITTER
Sample-and-Hold Aperture Delay Time Jitter 1 ps
CMRR Analog Input Common Mode Rejection Ratio f
IN
= 1MHz, V
IN
= 2V to –2V –62 dB
f
IN
= 100MHz, V
IN
= 2V to –2V –24 dB
A ALOG I PU
T
UU
3
LTC1402
The ● denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C. Bipolar mode with ± 5V supplies and unipolar mode with 5V supply. (Note 5)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
S/(N + D) Signal-to-Noise Plus 100kHz Input Signal 72.5 dB
Distortion Ratio 1.1MHz Input Signal
● 69 72.0 dB
THD Total Harmonic 100kHz First 5 Harmonics, Bipolar Mode –89 dB
Distortion 1.1MHz First 5 Harmonics, Bipolar Mode
● –89 –74.5 dB
100kHz First 5 Harmonics, Unipolar Mode –87 dB
1.1MHz First 5 Harmonics, Unipolar Mode –82 dB
SFDR Spurious Free 100kHz Input Signal, Bipolar Mode –93 dB
Dynamic Range 1.1MHz Input Signal, Bipolar Mode –93 dB
100kHz Input Signal, Unipolar Mode –93 dB
1.1MHz Input Signal, Unipolar Mode –84 dB
IMD Intermodulation ±1V 1.25MHz into A
IN
+
, 1.2MHz into A
IN
–
Bipolar Mode –84 dB
Distortion 1.5V to 3.5V 1.25MHz into A
IN
+
, 1.2MHz into A
IN
–
Unipolar Mode –84 dB
Code-to-Code V
REF
= 4.096V, 1LSB = 1mV 0.18 LSB
RMS
Transition Noise
Full Power Bandwidth V
IN
= 4V
P-P
, D
OUT
= 2828LSB
P-P
(Note 18) 82 MHz
Full Linear Bandwidth S/(N + D) ≥ 68dB Bipolar Mode 5.0 MHz
Unipolar Mode 3.5 MHz
DYNAMIC ACCURACY
UW
The ● denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. (Note 5)
INTERNAL REFERENCE CHARACTERISTICS
UU U
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
REF
Output Voltage I
OUT
= 0 4.096 V
V
REF
Output Tempco 15 ppm/°C
V
REF
Line Regulation AV
DD
= 4.75V to 5.25V, V
REF
= 4.096V 1 LSB/V
V
REF
Output Resistance Load Current = 0.5mA 2 Ω
V
REF
Settling Time 2ms
The ● denotes the specifications which apply over the
full operating temperature range, otherwise specifications are at T
A
= 25°C. (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 OV
DD
= 4.75V, I
OUT
= –10µA 4.7 V
OV
DD
= 4.75V, I
OUT
= –200µA ● 4V
OV
DD
= 3V, I
OUT
= –200µA ● 2.5 2.9 V
V
OL
Low Level Output Voltage V
DD
= 4.75V, I
OUT
= 160µA 0.05 V
V
DD
= 4.75V, I
OUT
= 1.6mA ● 0.10 0.4 V
I
OZ
Hi-Z Output Leakage D
OUT
V
OUT
= 0V to V
DD
● ±10 µA
C
OZ
Hi-Z Output Capacitance D
OUT
15 pF
I
SOURCE
Output Short-Circuit Source Current V
OUT
= 0V, OV
DD
= 5V –40 mA
V
OUT
= 0V, OV
DD
= 3V –15 mA
I
SINK
Output Short-Circuit Sink Current V
OUT
= OV
DD
= 5V 40 mA
DIGITAL I PUTS A D DIGITAL OUTPUTS
UU
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LTC1402CGN#TRPBF

Mfr. #:
Buy LTC1402CGN#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC Serial 12-B, 2.2Msps Smpl ADC w/ SD
Lifecycle:
New from this manufacturer.
Delivery:
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