Datasheet LTC1419 (Analog Devices)

LTC1419 14-Bit, 800ksps Sampling A/D Converter with Shutdown
U FEATURES DESCRIPTIO
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Sample Rate: 800ksps
The LTC®1419 is a 1µs, 800ksps, 14-bit sampling ■
Power Dissipation: 150mW
A/D converter that draws only 150mW from ±5V supplies. ■
81.5dB S/(N + D) and 93dB THD
This easy-to-use device includes a high dynamic range ■
No Missing Codes
sample-and-hold and a precision reference. Two digitally ■
No Pipeline Delay
selectable power shutdown modes provide flexibility for ■ Nap and Sleep Shutdown Modes low power systems. ■ Operates with 2.5V Internal 15ppm/°C The LTC1419 has a full-scale input range of ±2.5V. Out- Reference or External Reference standing AC performance includes 81.5dB S/(N + D) and ■ True Differential Inputs Reject Common Mode Noise 93dB THD with a 100kHz input; 80dB S/(N + D) and 86dB ■ 20MHz Full-Power Bandwidth Sampling THD at the Nyquist input frequency of 400kHz. ■ Bipolar Input Range: ±2.5V ■ 28-Pin SSOP and SO Packages The unique differential input sample-and-hold can acquire single-ended or differential input signals up to its 20MHz
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bandwidth. The 60dB common mode rejection allows
APPLICATIO S
users to eliminate ground loops and common mode noise by measuring signals differentially from the source. ■ Telecommunications ■ Digital Signal Processing The ADC has a µP compatible, 14-bit parallel output port. ■ Multiplexed Data Acquisition Systems There is no pipeline delay in the conversion results. A ■ High Speed Data Acquisition separate convert start input and data ready signal (BUSY) ■ Spectrum Analysis ease connections to FIFOs, DSPs and microprocessors. ■ Imaging Systems , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5581252.
U TYPICAL APPLICATIO 800kHz, 14-Bit Sampling A/D Converter Effective Bits and Signal-to-(Noise + Distortion) vs Input Frequency
LTC1419 5V DIFFERENTIAL 1 28 ANALOG INPUT +A 14 86 IN AVDD 2 27 (–2.5V TO 2.5V) –A 13 80 SIGNAL/(NOISE + DISTORTION) (dB) V IN DVDD –5V REF 3 26 OUTPUT 10µF V 12 74 REF VSS 2.50V 4 25 REFCOMP BUSY 10µF 11 68 5 24 10 62 1µF 10µF AGND CS 6 23 µP CONTROL D13(MSB) CONVST 9 7 22 LINES D12 RD 8 8 21 D11 SHDN 7 9 20 EFFECTIVE BITS 6 D10 D0 10 19 5 D9 D1 14-BIT 11 18 4 D8 D2 PARALLEL 12 17 3 BUS D7 D3 fSAMPLE = 800kHz 13 16 2 D6 D4 14 15 1k 10k 100k 1M 2M DGND D5 INPUT FREQUENCY (Hz) 1419 TA02 1419 TA01 1419fb 1