LTC1417
Low Power 14-Bit, 400ksps
Sampling ADC Converter
with Serial I/O
FEATURES
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DESCRIPTIO
16-Pin Narrow SSOP Package (SO-8 Footprint)
Sample Rate: 400ksps
鹵1.25LSB
INL and
鹵1LSB
DNL Max
Power Dissipation: 20mW (Typ)
Single Supply 5V or
鹵5V
Operation
Serial Data Output
No Missing Codes Over Temperature
Power Shutdown: Nap and Sleep
External or Internal Reference
Differential High Impedance Analog Input
Input Range: 0V to 4.096V or
鹵2.048V
81dB S/(N + D) and 鈥?95dB THD at Nyquist
The LTC
廬
1417 is a low power, 400ksps, 14-bit A/D con-
verter. This versatile device can operate from a single 5V or
鹵5V
supplies. An onboard high performance sample-and-
hold, a precision reference and internal trimming minimize
external circuitry requirements. The low 20mW power
dissipation is made even more attractive with two user-
selectable power shutdown modes.
The LTC1417 converts 0V to 4.096V unipolar inputs when
using a 5V supply and
鹵2.048V
bipolar inputs when using
鹵5V
supplies. DC specs include
鹵1.25LSB
INL,
鹵1LSB
DNL and no missing codes over temperature. Outstanding
AC performance includes 81dB S/(N + D) and 95dB THD
at a Nyquist input frequency of 200kHz.
The internal clock is trimmed for 2碌s maximum conver-
sion time. A separate convert start input and a data ready
signal (BUSY) ease connections to FIFOs, DSPs and
microprocessors.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
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High Speed Data Acquisition
Digital Signal Processing
Isolated Data Acquisition Systems
Audio and Telecom Processing
Spectrum Instrumentation
EQUIVALE T BLOCK DIAGRA
5V
10碌F
16
LTC1417
A
IN
+
A 400kHz, 14-Bit Sampling A/D Converter in a Narrow 16-Lead SSOP Package
Effective Bits and Signal-to-(Noise + Distortion)
vs Input Frequency
14
12
86
80
74
68
EFFECTIVE BITS
V
DD
1
2
S/H
14-BIT ADC
14
SERIAL
PORT
4.096V
BUFFER
14
BUSY
12
RD
13
CONVST
11
SHDN
1417 TA01
6
7
8
9
A
IN鈥?/div>
REFCOMP
10碌F
4
EXTCLKIN
SCLK
CLKOUT
D
OUT
V
REF
1碌F
3
8k
2.5V
REFERENCE
TIMING AND
LOGIC
5
AGND
15
V
SS
10
(0V OR 鈥?5V)
DGND
U
10
8
6
4
2
1k
10k
100k
INPUT FREQUENCY (Hz)
1M
1417 TA02
W
U
U
62
1
S/(N + D) (dB)
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