Datasheet LTC1608 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | High Speed, 16-Bit, 500ksps Sampling A/D Converter with Shutdown |
| Pages / Page | 20 / 1 — FEATURES. DESCRIPTIO. A Complete, 500ksps 16-Bit ADC. 90dB S/(N+D) and … |
| File Format / Size | PDF / 816 Kb |
| Document Language | English |
FEATURES. DESCRIPTIO. A Complete, 500ksps 16-Bit ADC. 90dB S/(N+D) and –100dB THD (Typ). Power Dissipation: 270mW (Typ)
Model Line for this Datasheet
Text Version of Document
LTC1608 High Speed, 16-Bit, 500ksps Sampling A/D Converter with Shutdown
U FEATURES DESCRIPTIO
■
A Complete, 500ksps 16-Bit ADC
The LTC®1608 is a 500ksps, 16-bit sampling A/D con- ■
90dB S/(N+D) and –100dB THD (Typ)
verter that draws only 270mW from ±5V supplies. This ■
Power Dissipation: 270mW (Typ)
high performance device includes a high dynamic range ■
No Pipeline Delay
sample-and-hold, a precision reference and a high speed ■
No Missing Codes Over Temperature
parallel output. Two digitally selectable power shutdown ■
Nap (7mW) and Sleep (10
µ
W) Shutdown Modes
modes provide power savings for low power systems. ■ Operates with Internal 15ppm/°C Reference The LTC1608’s full-scale input range is ± 2.5V. Outstand- or External Reference ing AC performance includes 90dB S/(N+D) and – 100dB ■ True Differential Inputs Reject Common Mode Noise THD at a sample rate of 500ksps. ■ 5MHz Full Power Bandwidth ■ The unique differential input sample-and-hold can acquire ±2.5V Bipolar Input Range ■ 36-Pin SSOP Package single-ended or differential input signals up to its 15MHz ■ Pin Compatible with the LTC1604 bandwidth. The 68dB common mode rejection allows
U
users to eliminate ground loops and common mode noise
APPLICATIO S
by measuring signals differentially from the source. ■ Telecommunications The ADC has µP compatible,16-bit parallel output port. ■ Digital Signal Processing There is no pipeline delay in conversion results. A separate ■ Multiplexed Data Acquisition Systems convert start input and a data ready signal (BUSY) ease ■ High Speed Data Acquisition connections to FlFOs, DSPs and microprocessors. ■ Spectrum Analysis , LTC and LT are registered trademarks of Linear Technology Corporation. ■ Imaging Systems Circuitry in the LTC1608 is covered under US Patent #5,764,175
U TYPICAL APPLICATIO
2.2µF 10µF 5V 10µF 5V 10µF 10Ω + + + 3 36 35 9 10
LTC1608 4096 Point FFT
V AV REF DD AVDD DVDD DGND SHDN 33 0 fSAMPLE = 500kHz LTC1608 CS 32 f CONTROL –20 IN = 98.754kHz µP SINAD = 86.7dB LOGIC CONVST 31 REFCOMP CONTROL 7.5k THD = –92.6dB 4 AND 2.5V RD 30 1.75X LINES –40 TIMING REF + BUSY 27 22µF –60 OVDD 29 5V OR + 3V –80 10 + µF OGND 28 1 AIN AMPLITUDE (dB) + DIFFERENTIAL –100 16-BIT OUTPUT ANALOG INPUT B15 TO B0 – SAMPLING 16-BIT ± A BUFFERS 2.5V 2 IN ADC D15 TO D0 PARALLEL –120 – BUS 11 TO 26 –140 AGND AGND AGND AGND VSS 1608 TA01 0 50 100 150 200 250 5 6 7 8 34 FREQUENCY (kHz) 1608 TA02 10µF + –5V 1
U FEATURES DESCRIPTIO
■
A Complete, 500ksps 16-Bit ADC
The LTC®1608 is a 500ksps, 16-bit sampling A/D con- ■
90dB S/(N+D) and –100dB THD (Typ)
verter that draws only 270mW from ±5V supplies. This ■
Power Dissipation: 270mW (Typ)
high performance device includes a high dynamic range ■
No Pipeline Delay
sample-and-hold, a precision reference and a high speed ■
No Missing Codes Over Temperature
parallel output. Two digitally selectable power shutdown ■
Nap (7mW) and Sleep (10
µ
W) Shutdown Modes
modes provide power savings for low power systems. ■ Operates with Internal 15ppm/°C Reference The LTC1608’s full-scale input range is ± 2.5V. Outstand- or External Reference ing AC performance includes 90dB S/(N+D) and – 100dB ■ True Differential Inputs Reject Common Mode Noise THD at a sample rate of 500ksps. ■ 5MHz Full Power Bandwidth ■ The unique differential input sample-and-hold can acquire ±2.5V Bipolar Input Range ■ 36-Pin SSOP Package single-ended or differential input signals up to its 15MHz ■ Pin Compatible with the LTC1604 bandwidth. The 68dB common mode rejection allows
U
users to eliminate ground loops and common mode noise
APPLICATIO S
by measuring signals differentially from the source. ■ Telecommunications The ADC has µP compatible,16-bit parallel output port. ■ Digital Signal Processing There is no pipeline delay in conversion results. A separate ■ Multiplexed Data Acquisition Systems convert start input and a data ready signal (BUSY) ease ■ High Speed Data Acquisition connections to FlFOs, DSPs and microprocessors. ■ Spectrum Analysis , LTC and LT are registered trademarks of Linear Technology Corporation. ■ Imaging Systems Circuitry in the LTC1608 is covered under US Patent #5,764,175
U TYPICAL APPLICATIO
2.2µF 10µF 5V 10µF 5V 10µF 10Ω + + + 3 36 35 9 10
LTC1608 4096 Point FFT
V AV REF DD AVDD DVDD DGND SHDN 33 0 fSAMPLE = 500kHz LTC1608 CS 32 f CONTROL –20 IN = 98.754kHz µP SINAD = 86.7dB LOGIC CONVST 31 REFCOMP CONTROL 7.5k THD = –92.6dB 4 AND 2.5V RD 30 1.75X LINES –40 TIMING REF + BUSY 27 22µF –60 OVDD 29 5V OR + 3V –80 10 + µF OGND 28 1 AIN AMPLITUDE (dB) + DIFFERENTIAL –100 16-BIT OUTPUT ANALOG INPUT B15 TO B0 – SAMPLING 16-BIT ± A BUFFERS 2.5V 2 IN ADC D15 TO D0 PARALLEL –120 – BUS 11 TO 26 –140 AGND AGND AGND AGND VSS 1608 TA01 0 50 100 150 200 250 5 6 7 8 34 FREQUENCY (kHz) 1608 TA02 10µF + –5V 1
