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AD7686BCPZRL 数据手册 - ADI（亚德诺）
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ADI（亚德诺）
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AD转换器
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LFCSP-10
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AD7686BCPZRL数据手册
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16-Bit, 500 kSPS PulSAR
ADC in MSOP
Data Sheet
AD7686
FEATURES
16-bit resolution with no missing codes
Throughput: 500 kSPS
INL: ±0.6 LSB typical, ±2 LSB maximum (±0.003% of FSR)
SINAD: 92.5 dB at 20 kHz
THD: −110 dB at 20 kHz
Pseudo differential analog input range
0 V to V
REF
with V
REF
up to VDD
No pipeline delay
Single-supply 5 V operation with
1.8 V/2.5 V/3 V/5 V logic interface
Proprietary serial interface: SPI-/QSPI™-/MICROWIRE™-/DSP-
compatible
Daisy-chain multiple ADCs and busy indicator
Power dissipation
3.75 µW at 5 V/100 SPS
3.75 mW at 5 V/100 kSPS
Standby current: 1 nA
10-lead MSOP (MSOP-8 size) and
3 mm × 3 mm, 10-lead LFCSP (SOT-23 size)
Pin-for-pin-compatible with 10-lead MSOP/PulSAR® ADCs
APPLICATIONS
Battery-powered equipment
Data acquisitions
Instrumentation
Medical instruments
Process controls
CODE
INL (LSB)
2.0
1.5
1.0
0.5
0
–0.5
–
1.0
–1.5
–2.0
0 16384 32768 49152 65535
02969-007
POSITIVE INL = +0.52LSB
NEGATIVE INL = –0.38LSB
Figure 1. Integral Nonlinearity vs. Code
1.
Protected by U.S. Patent 6,703,961.
FUNCTIONAL BLOCK DIAGRAM
AD7686
REF
GND
VDD
IN+
IN–
VIO
SDI
SCK
SDO
CNV
1.8V T
O VDD
3- OR 4-WIRE INTER
FACE
(SPI, DAISY CHAIN, CS)
0.5V
T
O 5V 5V
0 TO VREF
02969-002
Figure 2.
Table 1. MSOP, LFCSP/SOT-23 14-/16-/18-Bit PulSAR ADC
Type
100
kSPS
250
kSPS
400 kSPS
to
500 kSPS
1000
kSPS
ADC
Driver
18-Bit True AD7691 AD7690 AD7982 ADA4941
Differential AD7982 ADA4941
16-Bit True
AD7684
AD7687
AD7688
ADA4941
Differential
AD7693
ADA4841
16-Bit Pseudo AD7680 AD7685 AD7686 AD7980 ADA4941
Differential
AD7683
AD7694
14-Bit Pseudo
Differential
AD7940
AD7942
AD7946
ADA4941
GENERAL DESCRIPTION
The AD7686
1
is a 16-bit, charge redistribution, successive
approximation, analog-to-digital converter (ADC) that operates
from a single 5 V power supply, VDD. It contains a low power,
high speed, 16-bit sampling ADC with no missing codes, an
internal conversion clock, and a versatile serial interface port.
The part also contains a low noise, wide bandwidth, short
aperture delay track-and-hold circuit. On the CNV rising edge,
the AD7686 samples an analog input IN+ between 0 V to REF
with respect to a ground sense IN−. The reference voltage, REF,
is applied externally and can be set up to the supply voltage.
Power dissipation scales linearly with throughput.
The SPI-compatible serial interface also features the ability,
using the SDI input, to daisy-chain several ADCs on a single,
3-wire bus or provides an optional busy indicator. This device is
compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate
supply VIO.
The AD7686 is housed in a 10-lead MSOP or a 10-lead LFCSP
with operation specified from −40°C to +85°C.
Rev. C
Document Feedback
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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.
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Tel: 781.329.4700 ©2005–2014 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
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