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Datasheet> All Categories > Analog mixed-signal IC> converter> AD7274BRMZ
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AD7274BRMZ

Description
1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, ROHS COMPLIANT, MO-187AA, MSOP-8
CategoryAnalog mixed-signal IC    converter   
File Size2MB，40 Pages
ManufacturerRochester Electronics
Websitehttps://www.rocelec.com/
Environmental Compliance
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1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, ROHS COMPLIANT, MO-187AA, MSOP-8

AD7274BRMZ Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerRochester Electronics
Parts packaging codeTSSOP
package instructionTSSOP,
Contacts8
Reach Compliance Codeunknown
Maximum analog input voltage3.6 V
Minimum analog input voltage
Maximum conversion time0.291 µs
Converter typeADC, SUCCESSIVE APPROXIMATION
JESD-30 codeS-PDSO-G8
JESD-609 codee3
length3 mm
Maximum linear error (EL)0.0244%
Humidity sensitivity level1
Number of analog input channels1
Number of digits12
Number of functions1
Number of terminals8
Maximum operating temperature125 °C
Minimum operating temperature-40 °C
Output bit codeBINARY
Output formatSERIAL
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Package shapeSQUARE
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)260
Sampling rate3 MHz
Sample and hold/Track and holdTRACK
Maximum seat height1.1 mm
Nominal supply voltage3 V
surface mountYES
Temperature levelAUTOMOTIVE
Terminal surfaceMATTE TIN
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperature40
width3 mm

AD7274BRMZ Preview

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3 MSPS,10-/12-Bit
ADCs in 8-Lead TSOT
AD7273/AD7274
FEATURES
Throughput rate: 3 MSPS
Specified for V
DD
of 2.35 V to 3.6 V
Power consumption
11.4 mW at 3 MSPS with 3 V supplies
Wide input bandwidth
70 dB SNR at 1 MHz input frequency
Flexible power/serial clock speed management
No pipeline delays
High speed serial interface
SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible
Temperature range: −40°C to +125°C
Power-down mode: 0.1 μA typ
8-lead TSOT package
8-lead MSOP package
FUNCTIONAL BLOCK DIAGRAM
V
DD
AGND
V
IN
V
REF
T/H
10-/12-BIT
SUCCESSIVE
APPROXIMATION
ADC
SCLK
CONTROL
LOGIC
SDATA
CS
DGND
Figure 1.
GENERAL DESCRIPTION
The AD7273/AD7274 are 10-/12-bit, high speed, low power,
successive approximation ADCs, respectively. The parts operate
from a single 2.35 V to 3.6 V power supply and feature
throughput rates of up to 3 MSPS. Each part contains a low
noise, wide bandwidth track-and-hold amplifier that can handle
input frequencies in excess of 55 MHz.
The conversion process and data acquisition are controlled
using CS and the serial clock, allowing the devices to interface
with microprocessors or DSPs. The input signal is sampled on
the falling edge of CS, and the conversion is also initiated at this
point. The conversion rate is determined by the SCLK. There
are no pipeline delays associated with these parts.
The AD7273/AD7274 use advanced design techniques to
achieve very low power dissipation at high throughput rates.
The reference for the parts is applied externally and can be in
the range of 1.4 V to V
DD
. This allows the widest dynamic input
range to the ADC.
Table 1.
Part Number
AD7273
1
AD7274
1
AD7276
AD7277
AD7278
1
Resolution
10
12
12
10
8
Package
8-lead MSOP
8-Lead TSOT
8-lead MSOP
8-Lead TSOT
8-lead MSOP
6-Lead TSOT
8-lead MSOP
6-Lead TSOT
8-lead MSOP
6-Lead TSOT
Parts contain external reference pin.
PRODUCT HIGHLIGHTS
1. 3 MSPS ADCs in an 8-lead TSOT package.
2. High throughput with low power consumption.
3. Flexible power/serial clock speed management.
Allows maximum power efficiency at low throughput rates.
4. Reference can be driven up to the power supply.
5. No pipeline delay.
6. The parts feature a standard successive approximation ADC
with accurate control of the sampling instant via a CS input
and once-off conversion control.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
© 2005 Analog Devices, Inc. All rights reserved.
04973-001
AD7273/AD7274
AD7273/AD7274
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
AD7274 Specifications................................................................. 3
AD7273 Specifications................................................................. 5
Timing Specifications .................................................................. 7
Timing Examples.......................................................................... 8
Absolute Maximum Ratings............................................................ 9
ESD Caution.................................................................................. 9
Pin Configurations and Function Descriptions ......................... 10
Typical Performance Characteristics ........................................... 11
Terminology .................................................................................... 14
Circuit Information ........................................................................ 15
Converter Operation.................................................................. 15
ADC Transfer Function............................................................. 15
Typical Connection Diagram ....................................................... 16
Analog Input ............................................................................... 16
Digital Inputs .............................................................................. 16
Modes of Operation ....................................................................... 17
Normal Mode.............................................................................. 17
Partial Power-Down Mode ....................................................... 17
Full Power-Down Mode ............................................................ 17
Power-Up Times......................................................................... 18
Power vs. Throughput Rate....................................................... 20
Serial Interface ................................................................................ 21
Microprocessor Interfacing....................................................... 23
Application Hints ........................................................................... 24
Grounding and Layout .............................................................. 24
Evaluating the AD7273/AD7274 Performance......................... 24
Outline Dimensions ....................................................................... 25
Ordering Guide .......................................................................... 25
REVISION HISTORY
9/05—Revision 0: Initial Version
Rev. 0 | Page 2 of 28
AD7273/AD7274
SPECIFICATIONS
AD7274 SPECIFICATIONS
V
DD
= 2.35 V to 3.6 V, V
REF
= 2.35 V to V
DD
, f
SCLK
= 48 MHz, f
SAMPLE
= 3 MSPS, T
A
= T
MIN
to T
MAX
, unless otherwise noted.
Table 2.
Parameter
DYNAMIC PERFORMANCE
Signal-to-Noise + Distortion (SINAD)
3
Signal-to-Noise Ratio (SNR)
Total Harmonic Distortion (THD)
3
Peak Harmonic or Spurious Noise (SFDR)
3
Intermodulation Distortion (IMD)
Second-Order Terms
Third-Order Terms
Aperture Delay
Aperture Jitter
Full Power Bandwidth
Power Supply Rejection Ratio (PSRR)
DC ACCURACY
Resolution
Integral Nonlinearity
3
Differential Nonlinearity
3
Offset Error
3
Gain Error
3
Total Unadjusted Error (TUE)
3
ANALOG INPUT
Input Voltage Range
DC Leakage Current
Input Capacitance
REFERENCE INPUT
V
REF
Input Voltage Range
DC leakage Current
Input Capacitance
Input Impedance
LOGIC INPUTS
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current, I
IN
Input Capacitance, C
IN 4
LOGIC OUTPUTS
Output High Voltage, V
OH
Output Low Voltage, V
OL
Floating-State Leakage Current
Floating-State Output Capacitance
4
Output Coding
B Grade
1
68
69.5
−73
−78
−80
−82
−82
5
18
55
8
82
12
±1
±1
±3
±3.5
±3.5
0 to V
REF
±1
±5.5
42
10
1.4 to V
DD
±1
20
32
1.7
2
0.7
0.8
±1
2
Unit
2
dB min
dB min
dB max
dB typ
dB typ
dB typ
dB typ
ns typ
ps typ
MHz typ
MHz typ
dB typ
Bits
LSB max
LSB max
LSB max
LSB max
LSB max
V
μA max
μA max
pF typ
pF typ
V min/V max
μA max
pF typ
Ω typ
V min
V min
V max
V max
μA max
pF max
2.35 V ≤ V
DD
≤ 2.7 V
2.7 V < V
DD
≤ 3.6 V
2.35 V ≤ V
DD
< 2.7 V
2.7 V ≤ V
DD
≤ 3.6 V
Typically 10 nA, V
IN
= 0 V or V
DD
fa = 1 MHz, fb = 0.97 MHz
fa = 1 MHz, fb = 0.97 MHz
Test Conditions/Comments
f
IN
= 1 MHz sine wave
@ 3 dB
@ 0.1 dB
Guaranteed no missed codes to 12 bits
−40°C to +85°C
85°C to 125°C
When in track
When in hold
V
DD
− 0.2
V min
0.2
V max
±2.5
μA max
4.5
pF max
Straight (natural) binary
I
SOURCE
= 200 μA, V
DD
= 2.35 V to 3.6 V
I
SINK
= 200 μA
Rev. 0 | Page 3 of 28
AD7273/AD7274
Parameter
CONVERSION RATE
Conversion Time
Track-and-Hold Acquisition Time
3
Throughput Rate
POWER RQUIREMENTS
V
DD
I
DD
Normal Mode (Static)
Normal Mode (Operational)
Partial Power-Down Mode (Static)
Full Power-Down Mode (Static)
Power Dissipation
5
Normal Mode (Operational)
Partial Power-Down
Full Power-Down
1
2
B Grade
1
291
60
3
2.35/3.6
1
5
3.8
34
2
10
18
11.4
102
7.2
Unit
2
ns max
ns max
MSPS max
V min/V max
mA typ
mA max
mA typ
μA typ
μA max
μA max
mW max
mW typ
μW max
μW max
Test Conditions/Comments
14 SCLK cycles with SCLK at 48 MHz
See the Serial Interface section
Digital I/Ps = 0 V or V
DD
V
DD
= 3 V, SCLK on or off
V
DD
= 2.35 V to 3.6 V, f
SAMPLE
= 3 MSPS
V
DD
= 3 V
−40°C to +85°C, typically 0.1 μA
85°C to 125°C
V
DD
= 3.6 V , f
SAMPLE
= 3 MSPS
V
DD
= 3 V
V
DD
= 3 V
V
DD
= 3.6 V, −40°C to +85°C
Temperature range from −40°C to +125°C.
Typical specifications are tested with V
DD
= 3 V and V
REF
= 3 V at 25°C.
3
See the Terminology section.
4
Guaranteed by characterization.
5
See the Power vs. Throughput Rate section.
Rev. 0 | Page 4 of 28
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AD7274BRMZ AD7273BRMZ AD7273BUJZ-500RL7 AD7274BRMZ-REEL AD7274BUJ-500RL7 AD7274BRM
Description 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, ROHS COMPLIANT, MO-187AA, MSOP-8 1-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, ROHS COMPLIANT, MO-187AA, MSOP-8 1-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, ROHS COMPLIANT, MO-193-BA, TSOT-8 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, ROHS COMPLIANT, MO-187AA, MSOP-8 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, MO-193-BA, TSOT-8 1-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8, MO-187AA, MSOP-8
Is it lead-free? Lead free Lead free Lead free Lead free Contains lead Contains lead
Is it Rohs certified? conform to conform to conform to conform to incompatible incompatible
Maker Rochester Electronics Rochester Electronics Rochester Electronics Rochester Electronics Rochester Electronics Rochester Electronics
Parts packaging code TSSOP TSSOP TSSOP TSSOP TSSOP TSSOP
package instruction TSSOP, TSSOP, VSSOP, TSSOP, VSSOP, TSSOP,
Contacts 8 8 8 8 8 8
Reach Compliance Code unknown unknown unknown unknown unknown unknown
Maximum analog input voltage 3.6 V 3.6 V 3.6 V 3.6 V 3.6 V 3.6 V
Maximum conversion time 0.291 µs 0.25 µs 0.25 µs 0.291 µs 0.291 µs 0.291 µs
Converter type ADC, SUCCESSIVE APPROXIMATION ADC, SUCCESSIVE APPROXIMATION ADC, SUCCESSIVE APPROXIMATION ADC, SUCCESSIVE APPROXIMATION ADC, SUCCESSIVE APPROXIMATION ADC, SUCCESSIVE APPROXIMATION
JESD-30 code S-PDSO-G8 S-PDSO-G8 R-PDSO-G8 S-PDSO-G8 R-PDSO-G8 S-PDSO-G8
JESD-609 code e3 e3 e4 e3 e0 e0
length 3 mm 3 mm 2.9 mm 3 mm 2.9 mm 3 mm
Maximum linear error (EL) 0.0244% 0.0488% 0.0488% 0.0244% 0.0244% 0.0244%
Humidity sensitivity level 1 1 1 1 1 1
Number of analog input channels 1 1 1 1 1 1
Number of digits 12 10 10 12 12 12
Number of functions 1 1 1 1 1 1
Number of terminals 8 8 8 8 8 8
Maximum operating temperature 125 °C 125 °C 125 °C 125 °C 125 °C 125 °C
Minimum operating temperature -40 °C -40 °C -40 °C -40 °C -40 °C -40 °C
Output bit code BINARY BINARY BINARY BINARY BINARY BINARY
Output format SERIAL SERIAL SERIAL SERIAL SERIAL SERIAL
Package body material PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code TSSOP TSSOP VSSOP TSSOP VSSOP TSSOP
Package shape SQUARE SQUARE RECTANGULAR SQUARE RECTANGULAR SQUARE
Package form SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 260 260 260 260 240 240
Sampling rate 3 MHz 3 MHz 3 MHz 3 MHz 3 MHz 3 MHz
Sample and hold/Track and hold TRACK TRACK TRACK TRACK TRACK TRACK
Maximum seat height 1.1 mm 1.1 mm 0.9 mm 1.1 mm 0.9 mm 1.1 mm
Nominal supply voltage 3 V 3 V 3 V 3 V 3 V 3 V
surface mount YES YES YES YES YES YES
Temperature level AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE AUTOMOTIVE
Terminal surface MATTE TIN MATTE TIN NICKEL PALLADIUM GOLD MATTE TIN TIN LEAD TIN LEAD
Terminal form GULL WING GULL WING GULL WING GULL WING GULL WING GULL WING
Terminal pitch 0.65 mm 0.65 mm 0.65 mm 0.65 mm 0.65 mm 0.65 mm
Terminal location DUAL DUAL DUAL DUAL DUAL DUAL
Maximum time at peak reflow temperature 40 40 40 40 30 30
width 3 mm 3 mm 1.6 mm 3 mm 1.6 mm 3 mm

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