Datasheet AD7654 (Analog Devices)

16-Bit, 500 kSPS PulSAR Dual, 2-Channel, Simultaneous Sampling ADC Data Sheet AD7654 FEATURES FUNCTIONAL BLOCK DIAGRAM Dual, 16-bit, 2-channel simultaneous sampling ADC AVDD AGND REFGND REFx DVDD DGND 16-bit resolution with no missing codes TRACK/HOLD OVDD ×2 Throughput: INA1 SERIAL OGND INAN PORT 500 kSPS (normal mode) MUX 16 D[15:0] INA2 444 kSPS (impulse mode) SWITCHED A0 MUX SER/PAR CAP DAC INL: ±3.5 LSB max (±0.0053% of full scale) INB1 EOC INBN MUX SNR: 89 dB typ at 100 kHz BUSY INB2 THD: −100 dB at +100 kHz CLOCK PARALLEL PD CS INTERFACE Analog input voltage range: 0 V to 5 V CONTROL LOGIC AND RD RESET CALIBRATION CIRCUITRY No pipeline delay A/B AD7654 Parallel and serial 5 V/3 V interface BYTESWAP
001
SPI®/QSPI™/MICROWIRE™/DSP compatible IMPULSE CNVST
03057-
Single 5 V supply operation
Figure 1.
Power dissipation: Table 1. PulSAR® Selection 120 mW typical Type/kSPS 100 to 250 500 to 570 800 to 1000 >1000 2.6 mW at 10 kSPS
Pseudo Differential AD7660/ AD7650/ AD7653
Packages:
AD7661 AD7652
48-lead low profile quad flat package (LQFP)
AD7664/ AD7667
48-lead lead frame chip scale package (LFCSP)
AD7666
Low cost
True Bipolar AD7663 AD7665 AD7671 True Differential AD7675 AD7676 AD7677 AD7621
APPLICATIONS
AD7623
AC motor control
18-Bit AD7678 AD7679 AD7674 AD7641
3-phase power control
Multichannel/ AD7654 AD7655
4-channel data acquisition
Simultaneous
Uninterrupted power supplies Communications GENERAL DESCRIPTION PRODUCT HIGHLIGHTS
The AD7654 is a low cost, simultaneous sampling, dual-channel, 1. Simultaneous Sampling. 16-bit, charge redistribution SAR, analog-to-digital converter The AD7654 features two sample-and-hold circuits that that operates from a single 5 V power supply. It contains two allow simultaneous sampling. It provides inputs for four low noise, wide bandwidth, track-and-hold amplifiers that allow channels. simultaneous sampling, a high speed 16-bit sampling ADC, an 2. Fast Throughput. internal conversion clock, error correction circuits, and both The AD7654 is a 500 kSPS, charge redistribution, 16-bit serial and parallel system interface ports. Each track-and-hold SAR ADC with internal error correction circuitry. has a multiplexer in front to provide a 4-channel input ADC. 3. Superior INL and No Missing Codes. The A0 multiplexer control input allows the choice of The AD7654 has a maximum integral nonlinearity of simultaneously sampling input pairs INA1/INB1 (A0 = low) or 3.5 LSB with no missing 16-bit codes. INA2/INB2 (A0 = high). The part features a very high sampling 4. Single-Supply Operation. rate mode (normal) and, for low power applications, a reduced The AD7654 operates from a single 5 V supply. In impulse power mode (impulse) where the power is scaled with the mode, its power dissipation decreases with throughput. throughput. Operation is specified from −40°C to +85°C. 5. Serial or Parallel Interface. Versatile parallel or 2-wire serial interface arrangement is 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 TERMINOLOGY TYPICAL PERFORMANCE CHARACTERISTICS APPLICATIONS INFORMATION CIRCUIT INFORMATION MODES OF OPERATION TRANSFER FUNCTIONS TYPICAL CONNECTION DIAGRAM ANALOG INPUTS INPUT CHANNEL MULTIPLEXER DRIVER AMPLIFIER CHOICE VOLTAGE REFERENCE INPUT POWER SUPPLY POWER DISSIPATION CONVERSION CONTROL DIGITAL INTERFACE PARALLEL INTERFACE Master Parallel Interface Slave Parallel Interface 8-Bit Interface (Master or Slave) Channel A//B Output SERIAL INTERFACE MASTER SERIAL INTERFACE Internal Clock SLAVE SERIAL INTERFACE External Clock External Discontinuous Clock Data Read After Convert External Clock Data Read Previous During Convert MICROPROCESSOR INTERFACING SPI INTERFACE (ADSP-2191M) APPLICATION HINTS LAYOUT OUTLINE DIMENSIONS ORDERING GUIDE