Texas Instruments ADS7067 Handleiding

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ADS7067 Small, 8-Channel, 16-Bit, 800-kSPS SAR ADC With GPIOs

1 Features

•Package options:

–1.636mm × 1.636mm DSBGA and 3mm × 3mm

WQFN

–Space-saving, capless, 2.5V internal reference

•8 channels configurable as any combination of:

–Up to 8 analog inputs, digital inputs, or digital

outputs

•Programmable averaging filters:

–Programmable sample size for averaging

–Averaging with internal conversions

–20-bit resolution for average output

•Low-leakage multiplexer with channel sequencer:

–Manual mode

–On-the-fly mode

–Auto-sequence mode

•Excellent AC and DC performance:

–SNR: 90dB, THD: –100dB

–Improved SNR with programmable averaging

filters

–INL: ±1LSB, 16-bit no missing codes

–Internal calibration improves offset and drift

–High sample rate with no latency output:

800kSPS

•Wide operating range:

–ADC input range: 0V to V

REF

and 2 × V

REF

–Analog supply: 3V to 5.5V

–Digital supply: 1.65V to 5.5V

–Temperature range: –40°C to +125°C

•Enhanced-SPI digital interface:

–High-speed, 60MHz SPI interface

2 Applications

•Optical modules

•Optical line cards

•Multiparameter patient monitors

3 Description

The ADS7067 is a small, 16-bit, 8-channel, high-

precision successive-approximation register (SAR)

analog-to-digital converter (ADC). The ADS7067 has

an integrated capless reference and a reference

buffer that helps reduce the overall solution size by

requiring fewer external components. The wafer-level-

chip-scale package and fewer external components

make this device designed for space-constrained

applications. The device family includes the ADS7067

(800kSPS) and the ADS7066 (250kSPS) speed

variants.

The ADS7067 features built-in offset calibration for

improved accuracy over wide operating conditions

of the system. The programmable averaging filters

enable higher resolution measurement. The eight

channels of the ADS7067 can be individually

configured as analog inputs, digital inputs, or digital

outputs that enable smaller system size and simplify

circuit design for mixed signal feedback and digital

control.

The enhanced-SPI enables the ADS7067 in achieving

high throughput at lower clock speeds, thereby

simplifying the board layout and lowering system cost.

The ADS7067 features a cyclic redundancy check

(CRC) for data read and write operations and the

power-up configuration.

Package Information

PART NAMEPACKAGE

(1)

PACKAGE SIZE

(2)

ADS7067

YBH (DSBGA, 16)1.636mm × 1.636mm

RTE (WQFN, 16)3mm × 3mm

(1)For more information, see the Mechanical, Packaging, and

Orderable Information.

(2)The package size (length × width) is a nominal value and

includes pins, where applicable

ADS7067 Block Diagram

ADS7067

SBASA78B – MARCH 2021 – REVISED SEPTEMBER 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Product specificaties