LTC2357-18 Series

Buffered Quad, 18-Bit, 350ksps/Ch Differential ±10.24V ADC with 30VP-P Common Mode Range

Catalog

Buffered Quad, 18-Bit, 350ksps/Ch Differential ±10.24V ADC with 30VP-P Common Mode Range

Part	Number of Inputs	Sampling Rate (Per Second)	Number of A/D Converters	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Configuration	Reference Type	Architecture	Input Type	Supplier Device Package	Mounting Type	Voltage - Supply, Analog [Max]	Voltage - Supply, Analog [Min]	Operating Temperature [Max]	Operating Temperature [Min]	Features	Package / Case	Data Interface	Ratio - S/H:ADC	Number of Bits
Analog Devices LTC2357CLX-18#PBF	4	350 kPer Second	4	5.25 V	4.75 V	S/H-MUX-ADC	External Internal	SAR	Differential	48-LQFP (7x7)	Surface Mount	38 V	7.5 V	70 °C	0 °C	Simultaneous Sampling	48-LQFP	SPI	1:1
Analog Devices LTC2357CLX-16#PBF	4	350 kPer Second	4	5.25 V	4.75 V	S/H-MUX-ADC	External Internal	SAR	Differential	48-LQFP (7x7)	Surface Mount	38 V	7.5 V	70 °C	0 °C	Simultaneous Sampling	48-LQFP	SPI	1:1	16
Analog Devices LTC2357HLX-18#PBF	4	350 kPer Second	4	5.25 V	4.75 V	S/H-MUX-ADC	External Internal	SAR	Differential	48-LQFP (7x7)	Surface Mount	38 V	7.5 V	125 °C	-40 °C	Simultaneous Sampling	48-LQFP	SPI	1:1
Analog Devices LTC2357HLX-16#PBF	4	350 kPer Second	4	5.25 V	4.75 V	S/H-MUX-ADC	External Internal	SAR	Differential	48-LQFP (7x7)	Surface Mount	38 V	7.5 V	125 °C	-40 °C	Simultaneous Sampling	48-LQFP	SPI	1:1	16

Catalog

Buffered Quad, 18-Bit, 350ksps/Ch Differential ±10.24V ADC with 30VP-P Common Mode Range

Key Features

• Simultaneous Sampling of 4 Buffered Channels

• 350ksps per Channel Throughput

• 500pA/12nA Max Input Leakage at 85°C/125°C

• ±1LSB INL (Maximum, ±10.24V Range)

• Guaranteed 16-Bit, No Missing Codes

• Differential, Wide Common Mode Range Inputs

• Per-Channel SoftSpan Input Ranges:±10.24V, 0V to 10.24V, ±5.12V, 0V to 5.12V±12.5V, 0V to 12.5V, ±6.25V, 0V to 6.25V

• ±10.24V, 0V to 10.24V, ±5.12V, 0V to 5.12V

• ±12.5V, 0V to 12.5V, ±6.25V, 0V to 6.25V

• 94.2dB Single-Conversion SNR (Typical)

• −110dB THD (Typical) at fIN = 2kHz

• 128dB CMRR (Typical) at fIN = 200Hz

• Rail-to-Rail Input Overdrive Tolerance

• Integrated Reference and Buffer (4.096V)

• SPI CMOS (1.8V to 5V) and LVDS Serial I/O

• Internal Conversion Clock, No Cycle Latency

• 175mW Power Dissipation (44mW/Ch Typical)

• 48-Lead (7mm x 7mm) LQFP Package

Description

The LTC2357-18 is an 18-bit, low noise 4-channel simultaneous sampling successive approximation register (SAR) ADC with buffered differential, wide common mode range picoamp inputs. Operating from a 5V low voltage supply, flexible high voltage supplies, and using the internal reference and buffer, each channel of this SoftSpan™ADC can be independently configured on a conversion-by-conversion basis to accept ±10.24V, 0V to 10.24V, ±5.12V, or 0V to 5.12V signals. Individual channels may also be disabled to increase throughput on the remaining channels.The integrated picoamp-input analog buffers, wide input common mode range and 128dB CMRR of the LTC2357-18 allow the ADC to directly digitize a variety of signals using minimal board space and power. This input signal flexibility, combined with ±3.5LSB INL, no missing codes at 18 bits, and 96.4dB SNR, makes the LTC2357-18 an ideal choice for many high voltage applications requiring wide dynamic range.The LTC2357-18 supports pin-selectable SPI CMOS (1.8V to 5V) and LVDS serial interfaces. Between one and four lanes of data output may be employed in CMOS mode, allowing the user to optimize bus width and throughput.ApplicationsProgrammable Logic ControllersIndustrial Process ControlPower Line MonitoringTest and Measurement