LTC2435LTC2435-1 Series

20-Bit No Latency ΔΣ™ADCs with Differential Input and Differential Reference

Catalog

20-Bit No Latency ΔΣ™ADCs with Differential Input and Differential Reference

Part	Reference Type	Number of Bits	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]	Architecture	Number of A/D Converters	Mounting Type	Input Type	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Package / Case	Package / Case	Package / Case	Sampling Rate (Per Second)	Configuration	Data Interface	Number of Inputs	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]
Analog Devices LTC2435CGN#TRPBF	External	20	2.7 V	5.5 V	Sigma-Delta	1	Surface Mount	Differential	70 °C	0 °C	16-SSOP	0.154 in	16-SSOP	3.9 mm	15 Per Second	ADC	SPI	1	5.5 V	2.7 V
Analog Devices LTC2435-1IGN#TRPBF	External	20	2.7 V	5.5 V	Sigma-Delta	1	Surface Mount	Differential	85 °C	-40 °C	16-SSOP	0.154 in	16-SSOP	3.9 mm	13.75	ADC	SPI	1	5.5 V	2.7 V
Analog Devices LTC2435-1CGN#TRPBF	External	20	2.7 V	5.5 V	Sigma-Delta	1	Surface Mount	Differential	70 °C	0 °C	16-SSOP	0.154 in	16-SSOP	3.9 mm	13.75	ADC	SPI	1	5.5 V	2.7 V
Analog Devices LTC2435-1CGN#PBF	External	20	2.7 V	5.5 V	Sigma-Delta	1	Surface Mount	Differential	70 °C	0 °C	16-SSOP	0.154 in	16-SSOP	3.9 mm	13.75	ADC	SPI	1	5.5 V	2.7 V

Catalog

20-Bit No Latency ΔΣ™ADCs with Differential Input and Differential Reference

Key Features

• 2x Speed Up Version of the LTC2430: 15Hz Output Rate, 60Hz Notch—LTC2435; 13.75Hz Output Rate, Simultaneous 50Hz/60Hz Notch-LTC2435-1

• Differential Input and Differential Reference with GND to VCCCommon Mode Range

• 3ppm INL, No Missing Codes

• 10ppm Gain Error

• 0.8ppm Noise

• Single Conversion Settling Time for Multiplexed Applications

• Internal Oscillator—No External Components Required

• 20-Bit ADC in Narrow SSOP-16 Package (SO-8 Footprint)

• Single Supply 2.7V to 5.5V Operation

• Low Supply Current (200µA,4µA in Auto Sleep)

Description

The LTC2435/2435-1 are 2.7V to 5.5V micropower 20-bit differential ∆∑ analog to digital converters with integrated oscillator, 3ppm INL and 0.8ppm RMS noise. They use delta-sigma technology and provide single cycle settling time for multiplexed applications. Through a single pin, the LTC2435 can be configured for better than 110dB input differential mode rejection at 50Hz or 60Hz ±2%, or it can be driven by an external oscillator for a user defined rejection frequency. The LTC2435-1 can be configured for better than 87dB input differential mode rejection over the range of 49Hz to 61.2Hz (50Hz and 60Hz ±2% simultaneously). The internal oscillator requires no external frequency setting components.The converters accept any external differential reference voltage from 0.1V to VCCfor flexible ratiometric and remote sensing measurement configurations. The fullscale differential input range is from –0.5VREFto 0.5VREF. The reference common mode voltage, VREFCM, and the input common mode voltage, VINCM, may be independently set anywhere within the GND to VCCrange of the LTC2435/LTC2435-1. The DC common mode input rejection is better than 120dB.The LTC2435/LTC2435-1 communicate through a flexible 3-wire digital interface which is compatible with SPI and MICROWIRE™protocols.ApplicationsDirect Sensor DigitizerWeight ScalesDirect Temperature MeasurementGas AnalyzersStrain Gage TransducersInstrumentationData AcquisitionIndustrial Process Control6-Digit DVMs