LTC1410
12-Bit, 1.25Msp s Sa m p ling
A/D Co nve rte r with Shutd o wn
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DESCRIPTIO
EATURE
S
F
The LTC®1410 is a 0.65µs, 1.25Msps, 12-bit sampling
A/D converter that draws only 160mW from ±5V supplies.
This easy-to-use device includes a high dynamic range
sample-and-hold, a precision reference and requires no
external components. Two digitally selectable power shut-
down modes provide flexibility for low power systems.
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1.25Msps Sample Rate
Power Dissipation: 160mW
71dB S/(N + D) and 82dB THD at Nyquist
No Pipeline Delay
Nap (7mW) and Sleep (10µW) Shutdown Modes
Operates with Internal 15ppm/°C Reference
or External Reference
True Differential Inputs Reject Common Mode Noise
20MHz Full Power Bandwidth Sampling
±2.5V Bipolar Input Range
The LTC1410’s full-scale input range is ±2.5V. Maximum
DC specifications include±1LSB INL and±1LSB DNL over
temperature. Outstanding AC performance includes 71dB
S/(N + D) and 82dB THD at the Nyquist input frequency of
625kHz.
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28-Pin SO Wide Package
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Theuniquedifferentialinputsample-and-holdcanacquire
single-ended or differential input signals up to its 20MHz
bandwidth. The 60dB common mode rejection allows
users to eliminate ground loops and common mode noise
by measuring signals differentially from the source.
PPLICATI
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Telecommunications
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Digital Signal Processing
Multiplexed Data Acquisition Systems
High Speed Data Acquisition
Spectrum Analysis
The ADC has a µP compatible, 12-bit parallel output port.
There is no pipeline delay in the conversion results. A
separateconvertstartinputandadatareadysignal(BUSY)
ease connections to FIFOs, DSPs and microprocessors.
Imaging Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
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TYPICAL APPLICATI
Effective Bits and Signal-to-(Noise + Distortion)
vs Input Frequency
Complete 1.25MHz, 12-Bit Sampling A/D Converter
LTC1410
5V
DIFFERENTIAL
ANALOG INPUT
(–2.5V TO 2.5V)
1
2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
12
10
8
74
68
62
56
50
+A
AV
DD
IN
+
–5V
–A
IN
DV
DD
0.1µF
10µF
3
NYQUIST
2.50V
OUTPUT
V
REF
V
SS
V
REF
4
0.1µF
10µF
REFCOMP
AGND
BUSY
CS
+
5
0.1µF
10µF
6
D11(MSB) CONVST
µP CONTROL
LINES
7
6
D10
D9
RD
SHDN
NAP/SLP
OGND
D0
8
9
4
D8
10
11
12
13
14
D7
12-BIT
PARALLEL
BUS
2
D6
f
= 1.25MHz
SAMPLE
D5
D1
0
D4
D2
1k
10k
100k
1M
10M
DGND
D3
INPUT FREQUENCY (Hz)
LTC1410 • TA02
1410 TA01
1