AD7650ACPZ Analog Devices Inc, AD7650ACPZ Datasheet

16-Bit, 570kSPS CMOS ADC

AD7650ACPZ

Manufacturer Part Number
AD7650ACPZ
Description
16-Bit, 570kSPS CMOS ADC
Manufacturer
Analog Devices Inc
Datasheet

Specifications of AD7650ACPZ

Number Of Bits
16
Sampling Rate (per Second)
570k
Data Interface
Serial, Parallel
Number Of Converters
1
Power Dissipation (max)
77mW
Voltage Supply Source
Analog and Digital
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
48-VFQFN, CSP Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
EVAL-AD7650CBZ - BOARD EVALUATION FOR AD7650
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
a
GENERAL DESCRIPTION
The AD7650 is a 16-bit, 570 kSPS, charge redistribution SAR,
analog-to-digital converter that operates from a single 5 V power
supply. The part contains a high-speed 16-bit sampling ADC,
an internal conversion clock, error correction circuits, and both
serial and parallel system interface ports.
It features a very high sampling rate mode (Warp) and, for
asynchronous conversion rate applications, a fast mode (Normal)
and, for low power applications, a reduced power mode (Impulse)
where the power is scaled with the throughput.
It is fabricated using Analog Devices’ high-performance,
0.6 micron CMOS process and is available in a 48-lead LQFP
or in a tiny 48-lead Chip Scale package with operation specified
from –40°C to +85°C.
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corporation.
Patent pending.
PRODUCT HIGHLIGHTS
1. Fast Throughput
2. Single-Supply Operation
3. Serial or Parallel Interface
RESET
The AD7650 is a 570 kSPS, charge redistribution, 16-bit
SAR ADC.
The AD7650 operates from a single 5 V supply. In impulse
mode, its power dissipation decreases with the throughput from
77 mW at 444 kSPS throughput to, for instance, only 21 µW
at a 100 SPS throughput. It consumes 7 µW maximum when
in power-down.
Versatile parallel or 2-wire serial interface arrangement com-
patible with both 3 V or 5 V logic.
IN+
IN–
PD
AVDD AGND REF REFGND
WARP
CALIBRATION CIRCUITRY
FUNCTIONAL BLOCK DIAGRAM
CONTROL LOGIC AND
IMPULSE
SWITCHED
CAP DAC
Low Cost CMOS ADC
CNVST
CLOCK
AD7650
16-Bit, 570 kSPS
INTERFACE
PARALLEL
DVDD
SERIAL
PORT
AD7650
DGND
16
OVDD
OGND
SER/PAR
BUSY
DATA[15:0]
CS
RD
OB/2C

Related parts for AD7650ACPZ

AD7650ACPZ Summary of contents

Page 1

GENERAL DESCRIPTION The AD7650 is a 16-bit, 570 kSPS, charge redistribution SAR, analog-to-digital converter that operates from a single 5 V power supply. The part contains a high-speed 16-bit sampling ADC, an internal conversion clock, error correction circuits, and ...

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AD7650–SPECIFICATIONS Parameter Condition RESOLUTION ANALOG INPUT Voltage Range V IN+ Operating Input Voltage V IN+ V IN– Analog Input CMRR f IN Input Current 570 kSPS Throughput Input Impedance THROUGHPUT SPEED Complete Cycle In Warp Mode Throughput Rate In Warp ...

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Parameter Condition POWER SUPPLIES (continued) 5 Operating Current 570 kSPS Throughput AVDD 6 DVDD 6 OVDD 6 Power Dissipation 570 kSPS Throughput 444 kSPS Throughput 100 SPS Throughput In Power-Down Mode 9 TEMPERATURE RANGE Specified Performance T NOTES LSB means ...

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AD7650 TIMING SPECIFICATIONS (continued) Parameter REFER TO FIGURES 13 AND 14 (continued) SCLK Last Edge to SYNC Delay CS HIGH to SYNC HI-Z CS HIGH to Internal SCLK HI-Z CS HIGH to SDOUT HI-Z BUSY HIGH in Master Serial Read ...

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ABSOLUTE MAXIMUM RATINGS Analog Inputs 2 IN+ , REF, IN–, REFGND . . . . . . . . . . . . AVDD + 0 ...

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AD7650 CONNECT Pin No. Mnemonic Type 1 AGND P 2 AVDD P 3, 40–42, NC 44–48 4 DGND DI 5 OB/ WARP DI 7 IMPULSE DI 8 SER/PAR DI 9–12 DATA[0: DATA[4] DI/O ...

Page 7

Pin No. Mnemonic Type 16 DATA[7] DI/O or RDC/SDIN 17 OGND P 18 OVDD P 19 DVDD P 20 DGND P 21 DATA[ SDOUT 22 DATA[9] DI/O or SCLK 23 DATA[10 SYNC 24 DATA[11 ...

Page 8

AD7650 Pin No. Mnemonic Type CNVST AGND P 37 REF AI 38 REFGND AI 39 IN– IN+ AI NOTES AI = Analog Input DI = Digital Input DI/O = Bidirectional Digital DO = Digital Output ...

Page 9

CODE 8000 7396 7353 7000 6000 5000 4000 3000 2000 759 850 1000 7FFC 7FFE 8000 8002 8004 7FFD ...

Page 10

AD7650 CIRCUIT INFORMATION The AD7650 is a very fast, low power, single supply, precise 16-bit analog-to-digital converter (ADC). The AD7650 features different modes to optimize performances according to the applications. In warp mode, the AD7650 is capable of converting 570,000 ...

Page 11

Transfer Functions Using the OB/2C digital input, the AD7650 offers two output codings: straight binary and two’s complement. The LSB size is /65536, which is about 38.15 µV. The ideal transfer char- V REF acteristic for the AD7650 is shown ...

Page 12

AD7650 Analog Input Figure 6 shows an equivalent circuit of the input structure of the AD7650. AVDD D1 IN+ OR IN– AGND The two diodes, D1 and D2, provide ESD protection for the analog inputs IN+ and IN–. ...

Page 13

POWER DISSIPATION VS. THROUGHPUT Operating currents are very low during the acquisition phase, which allows a significant power saving when the conversion rate is reduced as shown in Figure 7. This power saving depends on the mode used. In impulse ...

Page 14

AD7650 PARALLEL INTERFACE The AD7650 is configured to use the parallel interface when the SER/PAR is held low. The data can be read either after each conversion, which is during the next acquisition phase, or dur- ing the following conversion ...

Page 15

CS, RD CNVST BUSY t 17 SYNC SCLK t SDOUT Usually, because the AD7650 is used with a fast throughput, the mode master, read during conversion is the most recommended serial mode ...

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AD7650 CS BUSY SCLK t 31 SDOUT t 16 SDIN CNVST BUSY t 3 SCLK t 31 SDOUT t 16 BUSY AD7650 AD7650 #2 (UPSTREAM) (DOWNSTREAM) RDC/SDIN SDOUT RDC/SDIN CNVST CS SCLK SCLK CNVST ...

Page 17

MICROPROCESSOR INTERFACING The AD7650 is ideally suited for traditional dc measurement appli- cations supporting a microprocessor, and ac signal processing applications interfacing to a digital signal processor. The AD7650 is designed to interface either with a parallel 16-bit-wide interface or ...

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AD7650 APPLICATION HINTS Bipolar and Wider Input Ranges In some applications desired to use a bipolar or wider ana- log input range like, for instance, ± ± Although ...

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OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 48-Lead Quad Flatpack (LQFP) 0.063 (1.60) MAX 0.030 (0.75) 0.018 (0.45) COPLANARITY 0.003 (0.08) 0.008 (0.2) 0.004 (0.09) CONTROLLING DIMENSIONS ARE IN MILLIMETERS; INCH DIMENSIONS ARE ROUNDED-OFF MILLIMETER EQUIVALENTS FOR REFERENCE ONLY ...

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