ADS9120 Datasheet, PDF (1/64 Pages) Texas Instruments – 16-Bit, 2.5-MSPS, 15.5-mW, SAR ADC

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ADS9120
SBAS710 – SEPTEMBER 2016
ADS9120 16-Bit, 2.5-MSPS, 15.5-mW, SAR ADC with multiSPI™ Interface
1 Features
•1 Sample Rate: 2.5 MSPS
• No Latency Output
• Excellent DC and AC Performance:
– INL: ±0.25 LSB (Typ), ±0.6 LSB (Max)
– DNL: ±0.6 LSB (Max), 16-Bit NMC
– SNR: 96 dB
– THD: –118 dB
• Wide Input Range:
– Unipolar Differential Input Range: ±V_REF
– V_REF Input Range: 2.5 V to 5 V,
Independent of AVDD
• Low-Power Dissipation:
– 9 mW at 2.5 MSPS (AVDD Only)
– 15 mW at 2.5 MSPS (Total)
– Flexible Low-Power Modes Enable Power
Scaling with Throughput
• multiSPI™: Enhanced Serial Interface
• JESD8-7A-Compliant Digital I/O at 1.8-V DVDD
• Fully-Specified Over Extended Temperature
Range: –40°C to +125°C
• Small Footprint: 4-mm × 4-mm VQFN
2 Applications
• Test and Measurement
• Motor Control
• Medical Imaging
• High-Precision, High-Speed Industrial
3 Description
The ADS9120 is an 16-bit, 2.5-MSPS, successive
approximation register (SAR) analog-to-digital
converter (ADC) with ±0.25-LSB INL and 96-dB SNR
specifications under typical operating conditions. The
high throughput enables developers to oversample
the input signal to improve dynamic range and
accuracy of the measurement.
The device supports unipolar, fully-differential analog
input signals and operates with a 2.5-V to 5-V
external reference, offering a wide selection of input
ranges without additional input scaling.
The device consumes only 15.5 mW of power when
operating at the full 2.5-MSPS throughput. Power
consumption at lower throughputs can be reduced by
using the flexible low-power modes (NAP and PD).
The integrated multiSPI™ serial interface is
backward-compatible to the traditional SPI protocol.
Additionally, configurable features simplify board
layout, timing, and firmware and achieve high
throughput at lower clock speeds, thus allowing easy
interface with a variety of microcontrollers, digital
signal processors (DSPs), and field-programmable
gate arrays (FPGAs).
The device supports JESD8-7A compliant I/Os, the
extended industrial temperature range, and is offered
in a space-saving, 4-mm × 4-mm, VQFN package.
PART NUMBER
ADS9120
Device Information
PACKAGE
BODY SIZE (NOM)
VQFN (24)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application Diagram and Integral Nonlinearity vs Code Plot
AVDD REFP REFM DVDD
ADS9120
VIN+
VIN-
VBIAS
+
OPA625
+ ^OPA625
AIN_P
AIN_M
16-Bit SAR ADC,
2.5 MSPS
multiSPI^TM
Serial
Interface
DDR
4X
SDO
CONVST
CS
SCLK
SDI
SDO ± 0
SDO ± 1
SDO ± 2
SDO ± 3
RVS
SPI
Mode
multiSPI^TM
Mode
AGND
RST
DGND
Copyright © 2016, Texas Instruments Incorporated
1
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.