LTC1609_15 Datasheet, PDF (1/24 Pages) Linear Technology – 16-Bit, 200ksps, Serial ADC with Multiple Input Ranges

FEATURES
s _{Sample Rate: 200ksps}
s _{Input Ranges}
Unipolar: 0V to 10V, 0V to 5V and 0V to 4V
Bipolar: ±10V, ±5V and ±3.3V
s _{Guaranteed No Missing Codes}
s _{Serial I/O}
s _{Single 5V Supply}
s _{Power Dissipation: 65mW Typ}
s _{Power Down Mode: 50µW}
s _{SNR: 87dB Typ}
s _{Operates with Internal or External Reference}
s _{28-Pin SSOP and 20-Pin SO Packages}
s _{Improved 2nd Source to ADS7809 and AD977A}
U
APPLICATIO S
s _{Industrial Process Control}
s _{Multiplexed Data Acquisition Systems}
s _{High Speed Data Acquisition for PCs}
s _{Digital Signal Processing}
LTC1609
16-Bit, 200ksps, Serial ADC
with Multiple Input Ranges
DESCRIPTIO
The LTC^®1609 is a 200ksps, serial sampling 16-bit A/D
converter that draws only 65mW (typical) from a single 5V
supply. This easy-to-use device includes a sample-and-
hold, a precision reference, a switched capacitor succes-
sive approximation A/D and trimmed internal clock.
The input range is specified for bipolar inputs of ±10V,
±5V and ±3.3V and unipolar inputs of 0V to 10V, 0V to 5V
and 0V to 4V. Maximum DC specs include ±2LSB INL and
16-bit no missing codes over temperature. It has a typical
signal-to-noise ratio of 87dB.
The ADC has a high speed serial interface. The serial
output data can be clocked out using either the internal
serial shift clock or be clocked out by an external shift
clock. A separate convert start input (R/C) and a data ready
signal (BUSY) ease connections to FIFOs, DSPs and
microprocessors.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
200kHz, 16-Bit Serial Sampling ADC Configured for ±10V Inputs
ANALOG INPUT
– 10V TO 10V
200Ω
100Ω
33.2k
2.5V
+
2.5V
2.2µF ₊
2.2µF
1
28
R1_IN
V_DIG
2
27
AGND1
V_ANA
3
26
R2_IN
PWRD
4
25
R3_IN
BUSY
5
24
NC
CS
6
LTC1609
23
CAP
NC
7
REF
22
NC
8
NC
21
R/C
9
AGND2
20
NC
10
NC
19
TAG
11
NC
18
NC
12
SB/BTC
17
DATA
13
16
EXT/INT DATACLK
14
DGND
15
SYNC
+
10µF
5V
0.1µF
SERIAL INTERFACE
1609 TA01
Nonaveraged 4096 Point FFT Plot
0
f_SAMPLE = 200kHz
–20
f_IN = 1kHz
SINAD = 87.2dB
THD = –100.1dB
–40
–60
–80
–100
–120
–130
0
25
50
75
FREQUENCY (kHz)
100
1609 G06
1609fa
1