LTC1604
High Speed, 16-Bit, 333ksps
Sampling A/D Converter
with Shutdown
FEATURES
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DESCRIPTION
The LTC
廬
1604 is a 333ksps, 16-bit sampling A/D con-
verter that draws only 220mW from
鹵5V
supplies. This
high performance device includes a high dynamic range
sample-and-hold, a precision reference and a high speed
parallel output. Two digitally selectable power shutdown
modes provide power savings for low power systems.
The LTC1604鈥檚 full-scale input range is
鹵
2.5V. Outstand-
ing AC performance includes 90dB S/(N+D) and 鈥?100dB
THD at a sample rate of 333ksps.
The unique differential input sample-and-hold can acquire
single-ended or differential input signals up to its 15MHz
bandwidth. The 68dB common mode rejection allows
users to eliminate ground loops and common mode noise
by measuring signals differentially from the source.
The ADC has
碌P
compatible,16-bit parallel output port.
There is no pipeline delay in conversion results. A separate
convert start input and a data ready signal (BUSY) ease
connections to FlFOs, DSPs and microprocessors.
, LTC and LT are registered trademarks of Linear Technology Corporation.
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A Complete, 333ksps 16-Bit ADC
90dB S/(N+D) and 鈥?00dB THD (Typ)
Power Dissipation: 220mW (Typ)
No Pipeline Delay
No Missing Codes over Temperature
Nap (7mW) and Sleep (10
碌
W) Shutdown Modes
Operates with Internal 15ppm/擄C Reference
or External Reference
True Differential Inputs Reject Common Mode Noise
5MHz Full Power Bandwidth
鹵2.5V
Bipolar Input Range
36-Pin SSOP Package
APPLICATIONS
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Telecommunications
Digital Signal Processing
Multiplexed Data Acquisition Systems
High Speed Data Acquisition
Spectrum Analysis
Imaging Systems
TYPICAL APPLICATION
2.2碌F
10碌F
10鈩?/div>
36
AV
DD
5V 10碌F
5V
10碌F
3
V
REF
+
35
AV
DD
+
9
+
10
DGND
SHDN 33
CS 32
RD 30
BUSY 27
OV
DD
29
5V OR
3V
10碌F
DV
DD
4 REFCOMP
7.5k
1.75X
+
47碌F
4.375V
2.5V
REF
AMPLITUDE (dB)
CONTROL
LOGIC
AND
TIMING
CONVST 31
碌P
CONTROL
LINES
1 A
IN+
DIFFERENTIAL
ANALOG INPUT
鹵
2.5V
2
A
IN鈥?/div>
+
鈥?/div>
OGND 28
16-BIT
SAMPLING
ADC
AGND
5
AGND
6
B15 TO B0
OUTPUT
BUFFERS
16-BIT
PARALLEL
BUS
11 TO 26
D15 TO D0
AGND
7
AGND V
SS
8
34
1604 TA01
+
鈥?V
10碌F
U
+
U
U
LTC1604 4096 Point FFT
0
鈥?0
鈥?0
鈥?0
鈥?0
鈥?00
鈥?20
鈥?40
0
f
SAMPLE
= 333kHz
f
IN
= 100kHz
SINAD = 89dB
THD = 鈥?6dB
20
40
100 120 140 160
FREQUENCY (kHz)
60
1604 TA02
80
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