LTC1604_15 Datasheet, PDF (1/20 Pages) Linear Technology – High Speed, 16-Bit, 333ksps Sampling A/D Converter with Shutdown

FEATURES
n _{A Complete, 333ksps 16-Bit ADC}
n _{90dB S/(N+D) and –100dB THD (Typ)}
n _{Power Dissipation: 220mW (Typ)}
n _{No Pipeline Delay}
n _{No Missing Codes over Temperature}
n _{Nap (7mW) and Sleep (10μW) Shutdown Modes}
n _{Operates with Internal 15ppm/°C Reference}
or External Reference
n _{True Differential Inputs Reject Common Mode Noise}
n _{5MHz Full Power Bandwidth}
n _{±2.5V Bipolar Input Range}
n _{36-Pin SSOP Package}
APPLICATIONS
n _{Telecommunications}
n _{Digital Signal Processing}
n _{Multiplexed Data Acquisition Systems}
n _{High Speed Data Acquisition}
n _{Spectrum Analysis}
n _{Imaging Systems}
LTC1604
High Speed, 16-Bit, 333ksps
Sampling A/D Converter
with Shutdown
DESCRIPTION
The LTC^®1604 is a 333ksps, 16-bit sampling A/D con-
verter that draws only 220mW from ±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’s full-scale input range is ±2.5V. Outstand-
ing AC performance includes 90dB S/(N+D) and –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 μP 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.
L, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
+
47μF
DIFFERENTIAL
ANALOG INPUT
±2.5V
2.2μF
3
V_REF
10μF
5V 10μF
10Ω
+
36
35
AV_DD AV_DD
4 ^REFCOMP
4.375V
1.75X
7.5k _2.5V
REF
5V 10μF
+
9
10
DV_DD
DGND
SHDN 33
CONTROL
LOGIC
AND
TIMING
CS 32
CONVST 31
RD 30
BUSY 27
μP
CONTROL
LINES
1 A_IN+
2 A_IN–
16-BIT
SAMPLING
ADC
B15 TO B0
OUTPUT
BUFFERS
AGND AGND AGND AGND V_SS
5
6
7
8 34
OV_{DD 29}
OGND 28
5V OR
3V
10μF
D15 TO D0
16-BIT
PARALLEL
BUS
11 TO 26
1604 TA01
+ ^10μF
–5V
LTC1604 4096 Point FFT
0
f_SAMPLE = 333kHz
–20 ^{fIN = 100kHz}
SINAD = 89dB
THD = –96dB
–40
–60
–80
–100
–120
–140
0 20 40 60 80 100 120 140 160
FREQUENCY (kHz)
1604 TA02
1604fa
1