LTC1417_15 Datasheet, PDF (1/32 Pages) Linear Technology – Low Power 14-Bit, 400ksps Sampling ADC Converter with Serial I/O

FEATURES
s _{16-Pin Narrow SSOP Package (SO-8 Footprint)}
s _{Sample Rate: 400ksps}
s _{±1.25LSB INL and ±1LSB DNL Max}
s _{Power Dissipation: 20mW (Typ)}
s _{Single Supply 5V or ±5V Operation}
s _{Serial Data Output}
s _{No Missing Codes Over Temperature}
s _{Power Shutdown: Nap and Sleep}
s _{External or Internal Reference}
s _{Differential High Impedance Analog Input}
s _{Input Range: 0V to 4.096V or ±2.048V}
s _{81dB S/(N + D) and – 95dB THD at Nyquist}
U
APPLICATIO S
s _{High Speed Data Acquisition}
s _{Digital Signal Processing}
s _{Isolated Data Acquisition Systems}
s _{Audio and Telecom Processing}
s _{Spectrum Instrumentation}
LTC1417
Low Power 14-Bit, 400ksps
Sampling ADC Converter
with Serial I/O
DESCRIPTIO
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
EQUIVALE T BLOCK DIAGRA
A 400kHz, 14-Bit Sampling A/D Converter in a Narrow 16-Lead SSOP Package
LTC1417
1
A_IN+
S/H
A_IN–
2
5V
10µF
16 V_DD
14-BIT ADC
14
4
REFCOMP
10µF
4.096V
BUFFER
SERIAL
PORT
3
V_REF
1µF
8k
2.5V
REFERENCE
TIMING AND
LOGIC
5 AGND
15 V_SS
10 DGND
(0V OR – 5V)
6
EXTCLKIN
7 _SCLK
8
CLKOUT
9
D_OUT
14 _BUSY
12 _RD
13 _CONVST
11 _SHDN
1417 TA01
Effective Bits and Signal-to-(Noise + Distortion)
vs Input Frequency
14
86
80
12
74
68
10
62
8
6
4
2
1k
10k
100k
1M
INPUT FREQUENCY (Hz)
1417 TA02
sn1417 1417fas
1