AD7767 24-Bit, 15 mW, 109 dB, 128 kSPS/64 kSPS/32 kSPS ADCs

The AD7767/AD7767-1/AD7767-2 are high performance, 24-bit, oversampled SAR analog-to-digital converters (ADCs). The AD7767/AD7767-1/AD7767-2 combine the benefits of a large dynamic range and input bandwidth, consuming 15 mW, 10.5 mW, and 8.5 mW power, respectively, and are contained in a 16-lead TSSOP package.

Ideal for ultralow power data acquisition (such as PCI- and USB-based systems), the AD7767/AD7767-1/AD7767-2 provide 24-bit resolution. The combination of exceptional SNR, wide dynamic range, and outstanding dc accuracy make the AD7767/AD7767-1/AD7767-2 ideally suited for measuring small signal changes over a wide dynamic range. This is particularly suitable for applications where small changes on the input are measured on larger ac or dc signals. In such an application, the AD7767/AD7767-1/AD7767-2 accurately gather both ac and dc information.

The AD7767/AD7767-1/AD7767-2 include an on-board digital filter (complete with linear phase response) that acts to elimi-nate out-of-band noise by filtering the oversampled input voltage. The oversampled architecture also reduces front-end antialias requirements. Other features of the AD7767 include a SYNC/PD (synchronization/power-down) pin, allowing the synchronization of multiple AD7767 devices. The addition of an SDI pin provides the option of daisy chaining multiple AD7767 devices.

The AD7767/AD7767-1/AD7767-2 operate from a 2.5 V supply using a 5 V reference. The devices operate from −40°C to +105°C.

Applications

Low power PCI/USB data acquisition systems
Low power wireless acquisition systems
Vibration analysis
Instrumentation
High precision medical acquisition

Features and Benefits

Oversampled successive approximation (SAR) architecture

High performance ac and dc accuracy, low power
115.5 dB dynamic range, 32 kSPS (AD7767-2)
112.5 dB dynamic range, 64 kSPS (AD7767-1)
109.5 dB dynamic range, 128 kSPS (AD7767)
−118 dB THD

Exceptionally low power
8.5 mW, 32 kSPS (AD7767-2)
10.5 mW, 64 kSPS (AD7767-1)
15 mW, 128 kSPS (AD7767)

High dc accuracy
24 bits, no missing codes (NMC)
INL: ±3 ppm (typical), ±7.6 ppm (maximum)

Low temperature drift
Zero error drift: 15 nV/°C
Gain error drift: 0.4 ppm/°C

On-chip low-pass FIR filter

2.5 V supply with 1.8 V/2.5 V/3 V/3.6 V logic interface options

Flexible interfacing options
Synchronization of multiple devices
Daisy-chain capability
Power-down function

Temperature range: −40°C to +105°C

Analog to Digital Converters

A/D Converters

Data Sheets

Document	note
AD7767: 24-Bit, 8.5 mW, 109 dB, 128 kSPS/64 kSPS/32 kSPS ADCs Data Sheet (Rev. C)	PDF 2194 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD7767BRUZ Production	16 ld TSSOP	OTH 96	-40 to 105C	9.51	8.6	Y
AD7767BRUZ-1 Production	16 ld TSSOP	OTH 96	-40 to 105C	9.51	8.6	Y
AD7767BRUZ-1-RL7 Production	16 ld TSSOP	REEL 1000	-40 to 105C	0	8.6	Y
AD7767BRUZ-2 Production	16 ld TSSOP	OTH 96	-40 to 105C	9.51	8.6	Y
AD7767BRUZ-2-RL7 Production	16 ld TSSOP	REEL 1000	-40 to 105C	0	8.6	Y
AD7767BRUZ-RL7 Production	16 ld TSSOP	REEL 1000	-40 to 105C	0	8.6	Y

Evaluation Boards

Part Number	Description	Price	RoHS
EVAL-AD7767-1EDZ	24-bit, 64ksps, 10.5mW ADC, with 109dB Dynamic Range Evaluation Board	59	Y
EVAL-AD7767-2EDZ	24-bit, 32ksps, 8.5mW ADC, with 109dB Dynamic Range Evaluation Board	59	Y
EVAL-AD7767EDZ	24-bit, 128ksps, 15mW ADC, with 109dB Dynamic Range Evaluation Board	59	Y
EVAL-CED1Z	Evaluation Control Board – FPGA based, acquires data from ADC card and uploads via USB to PC using evaluation board software	249	Y