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LTC1414IGN#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
1
LTC1414
14-Bit, 2.2Msps,
Sampling A/D Converter
Effective Bits and Signal-to-Noise + Distortion
vs Input Frequency
14-BIT ADC
14
5V
OPTIONAL 3V
LOGIC SUPPLY
10µF
AV
DD
DV
DD
OV
DD
OGND
1414 TA01
DGND
D13 (MSB)
D0 (LSB)
BUSY
S/H
BUFFER
LTC1414
4.0625V
2k
–5V
2.5V
REFERENCE
TIMING AND
LOGIC
OUTPUT
BUFFERS
•
•
•
CONVST
AGND
V
SS
10µF
10µF
V
REF
COMP
A
IN
–
A
IN
+
1µF
INPUT FREQUENCY (Hz)
EFFECTIVE BITS
S/(N + D) (dB)
10k 100k 1M 10M
1414 TA02
1k
14
13
12
11
10
9
8
7
6
5
4
3
2
86
80
74
68
f
SAMPLE
= 2.2MHz
TYPICAL APPLICATIO
U
The LTC
®
1414 is a 14-bit, 2.2Msps, sampling A/D con-
verter which draws only 175mW from ±5V supplies. This
high performance ADC includes a high dynamic range
sample-and-hold, a precision reference and requires no
external components.
The LTC1414’s high performance sample-and-hold has a
full-scale input range of ±2.5V. Outstanding AC perfor-
mance includes 80dB S/(N + D) and 95dB SFDR with a
100kHz input. The performance remains high at the Nyquist
input frequency of 1.1MHz with 78dB S/(N + D) and 84dB
SFDR.
The unique differential input sample-and-hold can acquire
single-ended or differential input signals up to its 40MHz
bandwidth. The 70dB common mode rejection can elimi-
nate ground loops and common mode noise by measuring
signal differentially from the source
The ADC has a microprocessor compatible, 14-bit parallel
output port. There is no pipline delay in the conversion
results.
■
Sample Rate: 2.2Msps
■
Outstanding Spectral Purity:
80dB S/(N + D) and 95dB SFDR at 100kHz
78dB S/(N + D) and 84dB SFDR at Nyquist
■
Ultralow Distortion with Single-Ended or
Differential Inputs
■
±2.5V Bipolar Input Range Eliminates Level Shifting
and Rail-to-Rail Op Amp Requirements
■
Easy Hookup for External or Internal Reference
■
No Pipeline Delay
■
Power Dissipation: 175mW on ±5V Supplies
■
28-Pin Narrow SSOP Package
, LTC and LT are registered trademarks of Linear Technology Corporation.
FEATURES
DESCRIPTIO
U
■
Telecommunications
■
Digital Signal Processing
■
Multiplexed Data Acquisition Systems
■
High Speed Data Acquisition
■
Spectrum Analysis
■
Imaging Systems
APPLICATIO S
U
2
LTC1414
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
U
AV
DD
= OV
DD
= DV
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
LTC1414C ............................................... 0°C to 70°C
LTC1414I............................................ –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
ORDER PART
NUMBER
T
JMAX
= 110°C, θ
JA
= 110°C/W
Consult factory for Industrial, Military and A grade parts.
LTC1414CGN
LTC1414IGN
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Analog Input Range 4.75V ≤ V
DD
≤ 5.25V, –5.25V ≤ V
SS
≤ –4.75V ● ±2.5 V
I
IN
Analog Input Leakage Current Between Conversions ● ±1 µA
C
IN
Analog Input Capacitance Between Conversions 8 pF
During Conversions 4 pF
t
ACQ
Sample-and-Hold Acquisition Time ● 40 100 ns
t
AP
Sample-and-Hold Aperture Delay Time –1 ns
t
jitter
Sample-and-Hold Aperture Delay Time Jitter 3 ps
RMS
CMRR Analog Input Common Mode Rejection Ratio –2.5V < (A
IN
–
= A
IN
+
) < 2.5V 70 dB
(Notes 5, 6)
CCHARA TERIST
ICS
CO
U
VERTER
LTC1414
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) ● 13 Bits
Integral Linearity Error (Note 7) ● ±0.75 ±2.0 LSB
Differential Linearity Error ● ±0.75 ±1.75 LSB
Offset Error (Note 8) ±5 ±20 LSB
● ±24 LSB
Full-Scale Error Internal Reference ±10 ±60 LSB
External Reference = 2.5V ±5 ±25 LSB
Full-Scale Tempco Internal Reference ±15 ppm/°C
External Reference = 2.5V ±1 ppm/°C
PUT
U
IA
A
U
LOG
(Note 5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
GN PACKAGE
28-LEAD PLASTIC SSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A
IN
+
A
IN
–
V
REF
REFCOMP
AGND
D13 (MSB)
D12
D11
D10
D9
D8
D7
D6
OGND
AV
DD
AGND
V
SS
BUSY
CONVST
DGND
DV
DD
OV
DD
D0
D1
D2
D3
D4
D5
3
LTC1414
(Note 5)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
S/(N + D) Signal-to-Noise Plus Distortion Ratio 100kHz Input Signal 80 dB
1.1MHz Input Signal 78 dB
THD Total Harmonic Distortion 100kHz Input Signal, First 5 Harmonics –95 dB
1.1MHz Input Signal, First 5 Harmonics –83 dB
SFDR Spurious Free Dynamic Range 100kHz Input Signal, First 5 Harmonics 95 dB
1.1MHz Input Signal, First 5 Harmonics 84 dB
IMD Intermodulation Distortion f
IN1
= 29.37kHz, f
IN2
= 32.446kHz –86 dB
Full Power Bandwidth 40 MHz
Full Linear Bandwidth S/(N + D) ≥ 74dB 3 MHz
ACCURACY
IC
DY
U
W
A
(Note 5)
I TER AL REFERE CE CHARACTERISTICS
U
UU
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 I
OUT
≤ 0.1mA 2 kΩ
COMP Output Voltage I
OUT
= 0 4.06 V
(Note 5)
DIGITAL I PUTS AND OUTPUTS
UU
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
DD
Positive Supply Voltage (Note 9) 4.75 5.25 V
V
SS
Negative Supply Voltage (Note 9) –4.75 –5.25 V
I
DD
Positive Supply Current CS High ● 12 16 mA
I
SS
Negative Supply Current CS High ● 23 30 mA
P
D
Power Dissipation 175 230 mW
POWER REQUIRE E TS
W
U
(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 1.2 pF
V
OH
High Level Output Voltage V
DD
= 4.75V, I
O
= –10µA 4.74 V
V
DD
= 4.75V, I
O
= –200µA ● 4.0 V
V
OL
Low Level Output Voltage V
DD
= 4.75V, I
O
= 160µA 0.05 V
V
DD
= 4.75V, I
O
= 1.6mA ● 0.10 0.4 V
I
SOURCE
Output Source Current V
OUT
= 0V –10 mA
I
SINK
Output Sink Current V
OUT
= V
DD
10 mA
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LTC1414IGN#TRPBF

Mfr. #:
Buy LTC1414IGN#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC 14-B, 2.2 Msps,Smpl A/D Conv
Lifecycle:
New from this manufacturer.
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