Differential SAR ADCs - Analog Devices
Description
Data Sheet
16-Bit, 2 MSPS/1 MSPS, Precision, Differential SAR ADCs
AD4001/AD4005
FEATURES
Easy Drive Greatly reduced input kickback Input current reduced to 0.
5 μA/MSPS Enhanced acquisition phase, ≥79% of cycle time at 1 MSPS First conversion accurate, no latency or pipeline delay Input span compression for single-supply operation Fast conversion allows low SPI clock rates Input overvoltage clamp protection sinks up to 50 mA SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface
High performance Differential analog input range: ±VREF, VREF from 2.
4 V to 5.
1 V Throughput: 2 MSPS/1 MSPS options INL: ±0.
4 LSB maximum Guaranteed 16-bit, no missing codes SNR: 96.
2 dB at fIN = 1 kHz, VREF = 5 V THD: −123 dB at fIN = 1 kHz, −99 dB at fIN = 100 kHz SINAD: 88.
5 dB at fIN = 1 MHz (see Figure 17) Oversampled dynamic range 99.
3 dB for OSR = 2 126 dB for OSR = 1024
Low power Single 1.
8 V supply operation with 1.
71 V to 5.
5 V logic interface 4.
9 mW at 1 MSPS (VDD only) 80 μW at 10 kSPS, 16 mW at 2 MSPS (total power)
10-lead packages: 3 mm × 3 mm LFCSP, 3 mm × 4.
90 mm MSOP Pin compatible with AD4003/AD4007/AD4011 family
Guaranteed operation: −40°C to +125°C
APPLICATIONS
Automated test equipment Machine automation Medical equipment Battery-powered equipment Precision data acquisition systems Instrumentation and control systems
VREF VREF/2
0 VREF VREF/2
0
FUNCTIONAL BLOCK DIAGRAM
2.
4V TO 5.
1V
10µF
1.
8V
REF
VDD
HIGH-Z MODE
AD4001/ AD4005
IN+
16-BIT SAR ADC
IN– CLAMPCOMPSRPEASNSION
TURBO MODE SERIAL INTERFACE STATUS BITS
GND
VIO 1.
8V TO 5V SDI
SCK SDO
CNV
3-WIRE OR 4-WIRE SPI INTERFACE (DAISY CHAIN, CS)
Figure 1.
Rev.
C
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