Differential Input, Quad, External Reference
Simultaneous Sampling, 16-Bit, SAR ADC
AD7380-4
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAM
16-bit ADC family
Quad simultaneous sampling
Fully differential analog inputs
High throughput rate: 4 MSPS
SNR: 92 dB (typical) at VREF = 3.3 V
On-chip oversampling function
SNR: 97.7 dB (typical) with OSR = 8×, RES = 1
2-bit resolution boost
ALERT
Out of range indicator (
INL: 3 LSBs (maximum)
)
High-speed serial interface
Temperature range: −40°C to +125°C
4 mm × 4 mm, 24-lead LFCSP
APPLICATIONS
Figure 1.
Motor control position feedback
Motor control current sense
Data acquisition systems
Erbium doped fiber amplifier (EDFA) applications
In phase and quadrature demodulation
GENERAL DESCRIPTION
The AD7380-4 is a 16-bit compatible, quad, simultaneous
sampling, high speed, successive approximation register (SAR),
analog-to-digital converters (ADC) operating from a 3.3 V
power supply with throughput rates up to 4 MSPS. The
differential analog input accepts a wide common-mode input
Table 1. Related Devices
No. of
Channels Input Type
16 Bits
14 Bits
12 Bits
4
2
Differential
AD7380-4
AD7389-4
AD7380
AD4680
AD4681
AD7381-4
CS
voltage and is sampled and converted on the falling edge of
.
Differential
AD7381
AD7387
The AD7380-4 has on-chip oversampling blocks to improve
dynamic range and reduce noise at lower bandwidths. The
oversampling can boost up to two bits of added resolution. The
Single-ended AD7386
AD7388
REFIN pin can have a reference voltage of 2.5 V to 3.3 V.
PRODUCT HIGHLIGHTS
The conversion process and data acquisition use standard
control inputs allowing easy interfacing to microprocessors or
digital signal processors (DSPs). The conversion result can
clock out simultaneously via 4-wire mode for faster throughput
or via 1-wire serial mode when slower throughput is allowed.
The device is compatible with 1.8 V, 2.5 V, and 3.3 V interfaces
using the separate logic supply.
1. Quad simultaneous sampling and conversion
2. Pin-compatible product family.
3. High throughput rate, 4 MSPS at 16-bit.
4. Space-saving, 4 mm × 4 mm LFCSP.
5. Integrated oversampling block to increase dynamic range,
reduce noise and reduce SCLK speed requirements.
6. Differential analog inputs with wide common-mode range.
7. Small sampling capacitor reduces amplifier drive burden.
The AD7380-4 is available in a 24-lead lead frame chip scale
package (LFCSP) and operates over a temperature range of −40°C
to +125°C.
Rev. 0
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Devices. Trademarks and registeredtrademarks are the property of their respective owners.
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Technical Support
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