
1
LTC1414
14-Bit, 2.2Msps,
Sampling A/D Converter
Effective Bits and Signal-to-Noise + Distortion
vs Input Frequency
14-BIT ADC
14
5V
OPTIONAL 3V
LOGIC SUPPLY
10
F
AVDD
DVDD
OVDD
OGND
1414 TA01
DGND
D13 (MSB)
D0 (LSB)
BUSY
S/H
BUFFER
LTC1414
4.0625V
2k
–5V
2.5V
REFERENCE
TIMING AND
LOGIC
OUTPUT
BUFFERS
CONVST
AGND
VSS
10
F
10
F
VREF
COMP
AIN
–
AIN
+
1
F
INPUT FREQUENCY (Hz)
EFFECTIVE
BITS
S/(N
+
D)
(dB)
10k
100k
1M
10M
1414 TA02
1k
14
13
12
11
10
9
8
7
6
5
4
3
2
86
80
74
68
fSAMPLE = 2.2MHz
TYPICAL APPLICATIO
U
The LTC
1414 is a 14-bit, 2.2Msps, sampling A/D con-
verter which draws only 175mW from
±5V supplies. This
high performance ADC includes a high dynamic range
sample-and-hold, a precision reference and requires no
external components.
The LTC1414’s high performance sample-and-hold has a
full-scale input range of
±2.5V. Outstanding AC perfor-
mance includes 80dB S/(N + D) and 95dB SFDR with a
100kHz input. The performance remains high at the Nyquist
input frequency of 1.1MHz with 78dB S/(N + D) and 84dB
SFDR.
The unique differential input sample-and-hold can acquire
single-ended or differential input signals up to its 40MHz
bandwidth. The 70dB common mode rejection can elimi-
nate ground loops and common mode noise by measuring
signal differentially from the source
The ADC has a microprocessor compatible, 14-bit parallel
output port. There is no pipline delay in the conversion
results.
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Sample Rate: 2.2Msps
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Outstanding Spectral Purity:
80dB S/(N + D) and 95dB SFDR at 100kHz
78dB S/(N + D) and 84dB SFDR at Nyquist
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Ultralow Distortion with Single-Ended or
Differential Inputs
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±2.5V Bipolar Input Range Eliminates Level Shifting
and Rail-to-Rail Op Amp Requirements
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Easy Hookup for External or Internal Reference
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No Pipeline Delay
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Power Dissipation: 175mW on
±5V Supplies
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28-Pin Narrow SSOP Package
, LTC and LT are registered trademarks of Linear Technology Corporation.
FEATURES
DESCRIPTIO
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Telecommunications
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Digital Signal Processing
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Multiplexed Data Acquisition Systems
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High Speed Data Acquisition
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Spectrum Analysis
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Imaging Systems
APPLICATIO S
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