Datasheet AD7655-EP (Analog Devices)

Low Cost, 4-Channel, 16-Bit 1 MSPS PulSAR ADC Enhanced Product AD7655-EP FEATURES FUNCTIONAL BLOCK DIAGRAM 4-channel, 16-bit resolution ADC AVDD AGND REFGND REFx DVDD DGND 2 track-and-hold amplifiers TRACK/HOLD OVDD
×
2 Throughput INA1 SERIAL OGND INAN PORT MUX 16 1 MSPS (normal mode) D[15:0] INA2 888 kSPS (impulse mode) SWITCHED A0 MUX SER/PAR CAP DAC Analog input voltage range: 0 V to 5 V INB1 EOC INBN MUX No pipeline delay BUSY INB2 CLOCK PARALLEL Parallel and serial 5 V/3 V interface CS PD INTERFACE CONTROL LOGIC AND RD SPI®/QSPI™/MICROWIRE™/DSP compatible RESET CALIBRATION CIRCUITRY A/B Single 5 V supply operation AD7655-EP BYTESWAP Power dissipation
001
120 mW typical IMPULSE CNVST
09230-
2.6 mW at 10 kSPS
Figure 1.
48-lead frame chip scale package (LFCSP) Table 1. PulSAR® Selection Pin-to-pin compatible with the AD7654 800 to Low cost Type/kSPS 100 to 250 500 to 570 1000 >1000 Supports defense and aerospace applications (AQEC
Pseudo AD7660/ AD7650/ AD7653
standard)
Differential AD7661 AD7652 AD7667 AD7664/
Military temperature range (−55°C to +125°C)
AD7666
Controlled manufacturing baseline
True Bipolar AD7663 AD7665 AD7671
Product change notification
True AD7675 AD7676 AD7677 AD7621
Qualification data available on request
Differential AD7623 18 Bit AD7678 AD7679 AD7674 AD7641
APPLICATIONS
Multichannel/ AD7654 AD7655
AC motor control
Simultaneous
3-phase power control
power applications, a reduced power mode (impulse) where the
4-channel data acquisition
power is scaled with the throughput. Operation is specified
Uninterrupted power supplies
from −55°C to +125°C.
Communications
Full details about this enhanced product are available in the
GENERAL DESCRIPTION
AD7655 data sheet, which should be consulted in conjunction The AD7655-EP is a low cost, simultaneous sampling, dual- with this data sheet. channel, 16-bit, charge redistribution SAR, analog-to-digital
PRODUCT HIGHLIGHTS
converter that operates from a single 5 V power supply. It contains two low noise, wide bandwidth, track-and-hold 1. Multichannel ADC. amplifiers that allow simultaneous sampling, a high speed The AD7655-EP features 4-channel inputs with two sample- 16-bit sampling ADC, an internal conversion clock, error and-hold circuits that allow simultaneous sampling. correction circuits, and both serial and parallel system interface 2. Fast Throughput. ports. Each track-and-hold has a multiplexer in front to provide The AD7655-EP is a 1 MSPS, charge redistribution, 16-bit a 4-channel input ADC. The A0 multiplexer control input SAR ADC with internal error correction circuitry. allows the choice of simultaneously sampling input pairs 3. Single-Supply Operation. INA1/INB1 (A0 = low) or INA2/ INB2 (A0 = high). The part The AD7655-EP operates from a single 5 V supply. In impulse features a very high sampling rate mode (normal) and, for low mode, its power dissipation decreases with throughput. 4. Serial or Parallel Interface. Versatile parallel or 2-wire serial interface arrangements are compatible with both 3 V and 5 V logic.
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Document Outline FEATURES APPLICATIONS GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM PRODUCT HIGHLIGHTS TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS OUTLINE DIMENSIONS ORDERING GUIDE