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LTC1406CGN#TRPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
1
LTC1406
Low Power, 8-Bit, 20Msps,
Sampling A/D Converter
The LTC
®
1406 is a 20Msps, 8-bit, sampling A/D converter
which draws only 150mW from a single 5V supply. This
easy-to-use device includes a high dynamic range sample-
and-hold with a 250MHz bandwidth.
The LTC1406’s full-scale input range is ±1V. The inputs
can be driven differentially or one input can be tied to a
fixed voltage and the other input driven with a ±1V bipolar
input. Maximum DC specifications include ±1LSB DNL
and INL over temperature. Outstanding AC performance
includes 48.5dB S/(N + D) and 62dB THD with a 1MHz
input; 47.5dB S/(N + D) and 59dB THD at the Nyquist input
frequency of 10MHz.
The unique differential input sample-and-hold can acquire
single-ended or differential input signals up to its 250MHz
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 an 8-bit parallel output port with separate
power supply and ground allowing easy interface to 3V
digital systems. The pipelined architecture has five clock
cycles of data latency.
DESCRIPTION
U
FEATURES
■
Low Power, 8-Bit, 20Msps ADC
■
250MHz Internal Sample-and-Hold
■
7 Effective Bits at 70MHz Input Frequency
■
±1LSB DNL and INL Max
■
Single 5V Supply and 150mW Dissipation
■
Power Down to 1µA
■
True Differential Inputs Reject Common Mode Noise
■
Accepts Single-Ended or Differential Input Signals
■
±1V Differential or 2V Single-Ended Input Span
■
Analog Inputs Common Mode to V
DD
and GND
■
24-Pin Narrow SSOP Package
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
U
Low Power, 20MHz, 8-Bit Sampling ADC
INPUT FREQUENCY (Hz)
EFFECTIVE BITS
S/(N + D) (dB)
2
4
6
100k 1M 10M 100M
1406 TA02
0
3
5
7
1
850
44
38
32
Effective Bits and Signal-to-Noise + Distortion
vs Input Frequency
APPLICATIONS
U
■
Telecommunications
■
Wireless Communications
■
Digital Cellular Telephones
■
CCDs and Image Scanners
■
Video Digitizing and Digital Television
■
Digital Color Copiers
■
High Speed Undersampling
■
Personal Computer Video
■
High Speed Data Acquisition
TRACK-AND-
HOLD AMP
DIGITAL
DATA
8-BIT
PIPELINE
ADC
2.5k
AV
DD
V
BIAS
V
REF
OV
DD
DV
DD
OGND
AGNDAGND SHDN
1.95k
2.2V
OUTPUT
DRIVERS
OF/UF
D7
D6
D5
D4
D3
D2
D1
D0
1406 BD
CLOCK
CIRCUITRY
CLK
A
IN
+
7
8
94 103 56 1
23
21112
22
21
20
19
18
17
16
15
24
A
IN
–
DGND
2
LTC1406
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
Analog Input Voltage (Note 3) .... – 0.3V to (V
DD
+ 0.3V)
Digital Input Voltage (Note 4) .................. – 0.3V to 10V
Digital Output Voltage................. – 0.3V to (V
DD
+ 0.3V)
Power Dissipation.............................................. 500mW
Ambient Operation Temperature Range
LTC1406C................................................ 0°C to 70°C
LTC1406I............................................ –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
ORDER PART
NUMBER
Consult factory for Military grade parts.
LTC1406CGN
LTC1406IGN
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
GN PACKAGE
24-LEAD PLASTIC SSOP
24
23
22
21
20
19
18
17
16
15
14
13
OGND
OV
DD
SHDN
V
BIAS
V
REF
AGND
A
IN
+
A
IN
–
AV
DD
AGND
DGND
DV
DD
CLK
OF/UF
D7
D6
D5
D4
D3
D2
D1
D0 
NC
NC
T
JMAX
= 110°C, θ
JA
= 85°C/ W
CCHARA TERIST
ICS
CO
U
VERTER
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25°C.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) ● 8 Bits
Integral Linearity Error (Note 7) ● ±0.5 ±1 LSB
Differential Linearity Error ● ±0.25 ±1 LSB
Offset Error (Note 8) ● ±1 ±8 LSB
Gain Error With External 2.5V Reference ±1 ±5 LSB
(Notes 5, 6)
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25°C.
PUT
U
IA
A
U
LOG
(Note 5)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Analog Input Span [(A
IN
+
) – (A
IN
–
)] (Note 9) 4.75V ≤ V
DD
≤ 5.25V ● ±1V
Input (A
IN
+
or A
IN
–
) Range Voltage On Either A
IN
+
or A
IN
–
● 0V
DD
V
I
IN
Analog Input Leakage Current CLK = 0 ● ±5 µA
C
IN
Analog Input Capacitance CLK = 1 4 pF
CLK = 0 2 pF
Input Bandwidth 250 MHz
t
AP
Sample-and-Hold Aperture Delay Time 3 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
V
BIAS
Internal Bias Voltage No Load 2.2 V
3
LTC1406
ACCURACY
IC
DY
U
W
A
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25°C. (Note 5)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
S/(N + D) Signal-to-Noise Plus Distortion Ratio 1MHz Input Signal 48.5 dB
10MHz Input Signal 47.5 dB
THD Total Harmonic Distortion 1MHz Input Signal, First 5 Harmonics –62 dB
10MHz Input Signal, First 5 Harmonics –59 dB
SFDR Spurious Free Dynamic Range 1MHz Input Signal 63 dB
10MHz Input Signal 60 dB
IMD Intermodulation Distortion f
IN1
= 3.500977MHz, f
IN2
= 3.598633MHz 60 dB
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
AV
DD
Analog Positive Supply Voltage (Note 10) 4.75 5.25 V
DV
DD
Digital Positive Supply Voltage (Note 10) 4.75 5.25 V
OV
DD
Output Positive Supply Voltage (Note 10) 2.7 5.25 V
V
BIAS
Internal Bias Voltage When Externally Driven (Note 10) 1.9 2.2 2.5 V
V
REF
Reference Voltage (Note 10) 2 2.5 3 V
OGND Output Ground (Note 10) 0 2 V
I
DD
Positive Supply Current AV
DD
= DV
DD
= OV
DD
= 5V, f
SMPL
= 20MHz (Note 13) ● 30 45 mA
P
D
Power Dissipation ● 150 225 mW
Power Down Positive Supply Current SHDN = 0V, CLK = V
DD
or 0 1 10 µA
Power Down Power Dissipation SHDN = 0V, CLK = V
DD
or 0 5 50 µW
(Note 5)
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25°C.
DIGITAL I PUTS AND OUTPUTS
UU
(Note 5)
The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25°C.
POWER REQUIRE E TS
W
U
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
● ±5 µA
C
IN
Digital Input Capacitance 5pF
V
OH
High Level Output Voltage V
DD
= 4.75V, I
O
= –10µA 4.5 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 –20 mA
I
SINK
Output Sink Current V
OUT
= V
DD
30 mA
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LTC1406CGN#TRPBF

Mfr. #:
Buy LTC1406CGN#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Analog to Digital Converters - ADC L Pwr, 8-B, 20Msps, Smpl A/D Conv
Lifecycle:
New from this manufacturer.
Delivery:
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