1
LTC1417
Low Power 14-Bit, 400ksps
Sampling ADC Converter
with Serial I/O
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
The LTC
®
1417 is a low power, 400ksps, 14-bit A/D con-
verter. This versatile device can operate from a single 5V or
±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 ±2.048V bipolar inputs when using
±5V supplies. DC specs include ±1.25LSB INL, ±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 2µs maximum conver-
sion time. A separate convert start input and a data ready
signal (BUSY) ease connections to FIFOs, DSPs and
microprocessors.
■
16-Pin Narrow SSOP Package (SO-8 Footprint)
■
Sample Rate: 400ksps
■
±1.25LSB INL and ±1LSB DNL Max
■
Power Dissipation: 20mW (Typ)
■
Single Supply 5V or ±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 ±2.048V
■
81dB S/(N + D) and –95dB THD at Nyquist
■
High Speed Data Acquisition
■
Digital Signal Processing
■
Isolated Data Acquisition Systems
■
Audio and Telecom Processing
■
Spectrum Instrumentation
, LTC and LT are registered trademarks of Linear Technology Corporation.
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
S/H
14
BUFFER
8k
10µF
10µF
REFCOMP
A
IN
–
A
IN
+
V
REF
4.096V
5V
LTC1417
14-BIT ADC
SERIAL
PORT
DGND10155
3
4
2
1
1417 TA01
V
SS
(0V OR –5V)
AGND
EXTCLKIN
SCLK
CLKOUT
D
OUT
V
DD
16
TIMING AND
LOGIC
2.5V
REFERENCE
BUSY
RD
CONVST
SHDN
1µF
6
7
8
9
14
12
13
11
INPUT FREQUENCY (Hz)
4
EFFECTIVE BITS
S/(N + D) (dB)
6
8
10
12
10k 100k 1M
1417 TA02
2
1k
14 86
80
74
68
62
EQUIVALE T BLOCK DIAGRA
W
U
