1 Features

• High-speed and low-power:

– ADS9219: 20MSPS/ch, 230mW/ch

– ADS9218: 10MSPS/ch, 146mW/ch

– ADS9217: 5MSPS/ch, 95mW/ch

• 2-channel, simultaneous sampling

• Feature integration:

– Integrated ADC driver

– Integrated precision reference

– Common-mode voltage output buffer

• High performance:

– 18-bit no-missing-codes

– INL: ±1LSB, DNL: ±0.75LSB

– SNR: 95.5dB and 104.5dB SNR with OSR = 16

• Wide input bandwidth (–3dB):

– ADS9219 and ADS9218: 90MHz

– ADS9217: 45MHz

• Serial LVDS interface:

– SDR and DDR output modes

– Synchronous clock and data output

• Extended operating range: –40°C to +125°C

2 Applications

• Power analyzers

• Source measurement units (SMU)

• Marine equipment

• Servo drive position feedback

• DC power supplies, AC sources, electronic loads

3 Description

The ADS921x is a family of 18-bit, high-speed, dualchannel,

simultaneous-sampling, analog-to-digital

converters (ADCs) with an integrated driver for the

ADC inputs. The integrated ADC driver simplifies

the signal chain, reduces power consumption for

precision applications, and supports high-frequency

signals beyond 1MHz. By not requiring an external

decoupling capacitor, the integrated ADC reference

buffer is optimized for wide bandwidth applications.

The ADS921x uses a serial LVDS (SLVDS)

data interface that enables high-speed digital

communication while minimizing digital switching

noise. Read the dual-channel ADC data using

separate SLVDS outputs per ADC channel or one

SLVDS output for both ADC channels.