AD7689 16-Bit, 8-Channel,250 kSPS PulSAR ADC _ BDTIC a Leading Distributor in China

AD7689 16-Bit, 8-Channel,250 kSPS PulSAR ADC

The AD7682/AD7689 are 4-channel/8-channel, 16-bit, charge redistribution successive approximation register (SAR) analogto-digital converters (ADCs) that operate from a single power supply, VDD.

The AD7682/AD7689 contain all components for use in a multichannel, low power data acquisition system, including a true 16-bit SAR ADC with no missing codes; a 4-channel (AD7682) or 8-channel (AD7689) low crosstalk multiplexer that is useful for configuring the inputs as single-ended (with or without ground sense), differential, or bipolar; an internal low drift reference (selectable 2.5 V or 4.096 V) and buffer; a temperature sensor; a selectable one-pole filter; and a sequencer that is useful when channels are continuously scanned in order.

The AD7682/AD7689 use a simple SPI interface for writing to the configuration register and receiving conversion results. The SPI interface uses a separate supply, VIO, which is set to the host logic level. Power dissipation scales with throughput.

The AD7682/AD7689 are housed in a tiny 20-lead LFCSP and 20-lead WLCSP with operation specified from −40°C to +85°C.

Applications

Features and Benefits

16-bit resolution with no missing codes

8-channel multiplexer with choice of inputs

Unipolar single-ended

Differential (GND sense)

Pseudobipolar

Throughput: 250 kSPS

INL: ±0.4 LSB typical, ±1.5 LSB maximum (±23 ppm or FSR)

Dynamic range: 93.8 dB

SINAD: 92.5 dB at 20 kHz

THD: −100 dB at 20 kHz

Analog input range: 0 V to VREF with VREF up to VDD

See data sheet for additional features

Analog to Digital Converters

A/D Converters

Reference Designs

CN0254 Design & Integration Files .ZIP

Data Sheets

Document	note
AD7682/AD7689: 16-Bit, 4-Channel/8-Channel, 250 kSPS PulSAR ADC Data Sheet (Rev. F)	PDF 673.58 K

Application Notes

Document	note
AN-742: Frequency Domain Response of Switched-Capacitor ADCs (Rev. B)	PDF 401 kB
AN-931: Understanding PulSAR ADC Support Circuitry (Rev. 0)	PDF 299 kB
AN-932: Power Supply Sequencing (Rev. 0)	PDF 95 kB

Technical Books

Document	note

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD7689ACPZ Production	20 ld LFCSP (4x4mm 2.5EP)	OTH 490	-40 to 85C	6.63	5.99	Y
AD7689ACPZRL7 Production	20 ld LFCSP (4x4mm 2.5EP)	REEL 1500	-40 to 85C	0	5.99	Y
AD7689BCBZ-RL7 Production	20-Ball Wafer Level Chip Scale Package [WLCSP]	REEL 1500	-40 to 85C	0	7.07	Y
AD7689BCPZ Production	20 ld LFCSP (4x4mm 2.5EP)	OTH 490	-40 to 85C	7.82	7.07	Y
AD7689BCPZRL7 Production	20 ld LFCSP (4x4mm 2.5EP)	REEL 1500	-40 to 85C	0	7.07	Y