Datasheet LTC1405 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | 12-Bit, 5Msps, Sampling ADC |
| Seiten / Seite | 20 / 1 — FEATURES. DESCRIPTIO. 5Msps Sample Rate. Low Power Dissipation: 115mW. … |
| Dateiformat / Größe | PDF / 337 Kb |
| Dokumentensprache | Englisch |
FEATURES. DESCRIPTIO. 5Msps Sample Rate. Low Power Dissipation: 115mW. Single 5V Supply or. 5V Supplies
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LTC1405 12-Bit, 5Msps, Sampling ADC
U FEATURES DESCRIPTIO
■
5Msps Sample Rate
The LTC®1405 is a 5Msps, 12-bit sampling A/D converter ■
Low Power Dissipation: 115mW
that draws only 115mW from either single 5V or dual ±5V ■
Single 5V Supply or
±
5V Supplies
supplies. This easy-to-use device includes a high dynamic ■
71.3dB S/(N + D) and 85dB SFDR at Nyquist
range sample-and-hold, a precision reference and a PGA ■
100MHz Full-Power Bandwidth Sampling
input circuit. ■
Input PGA
The LTC1405 has a flexible input circuit that allows full-scale ■ Integral Nonlinearity Error <0.35LSB input ranges of ±2.048V, ±1.024V and ±0.512V. The input ■ Differential Nonlinearity <0.25LSB common mode range is rail-to-rail and a common mode ■ ±2.048V, ±1.024V and ±0.512V Bipolar Input Range bias voltage is provided for single supply applications. The ■ Out-of-Range Indicator input PGA has a digitally selectable 1x or 2x gain. ■ True Differential Inputs with 75dB CMRR ■ Pin-Compatible 10Msps Version (LTC1420) Maximum DC specs include ±1LSB INL and ±1LSB DNL ■ 28-Pin Narrow SSOP Package over temperature. Outstanding AC performance includes
U
71.3dB S/(N + D) and 85dB SFDR at the Nyquist input fre-
APPLICATIO S
quency of 2.5MHz. ■ Telecommunications The unique differential input sample-and-hold can acquire ■ Digital Signal Processing single-ended or differential input signals up to its 100MHz ■ Multiplexed Data Acquisition Systems bandwidth. The 75dB common mode rejection allows users ■ High Speed Data Acquisition to eliminate ground loops and common mode noise by ■ Spectral Analysis measuring signals differentially from the source. A sepa- ■ Imaging Systems rate output logic supply allows direct connection to 3V components. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
U TYPICAL APPLICATION
5V 5V 5V OPTIONAL 3V LOGIC SUPPLY 1µF 1µF 1µF V V DD DD
Typical INL Curve
GAIN (PIN 7) (PIN 23) OVDD 1.00 +AIN 0.75 S/H PIPELINED 12-BIT ADC OF 0.50 –AIN D11 (MSB) 0.25 OUTPUT VCM BUFFERS 0 1µF MODE SELECT DIGITAL CORRECTION INL (LSBs) –0.25 LOGIC D0 (LSB) SENSE –0.50 2.5V 5MHz CLK –0.75 REFERENCE VREF –1.00 1µF 2.048V 0 1024 2048 3072 4096 CODE 1405 TA02 1405 TA01 V GND GND OGND SS GND 1µF (PIN 6) (PIN 8) (PIN 24) 0V OR –5V 1405fa 1
U FEATURES DESCRIPTIO
■
5Msps Sample Rate
The LTC®1405 is a 5Msps, 12-bit sampling A/D converter ■
Low Power Dissipation: 115mW
that draws only 115mW from either single 5V or dual ±5V ■
Single 5V Supply or
±
5V Supplies
supplies. This easy-to-use device includes a high dynamic ■
71.3dB S/(N + D) and 85dB SFDR at Nyquist
range sample-and-hold, a precision reference and a PGA ■
100MHz Full-Power Bandwidth Sampling
input circuit. ■
Input PGA
The LTC1405 has a flexible input circuit that allows full-scale ■ Integral Nonlinearity Error <0.35LSB input ranges of ±2.048V, ±1.024V and ±0.512V. The input ■ Differential Nonlinearity <0.25LSB common mode range is rail-to-rail and a common mode ■ ±2.048V, ±1.024V and ±0.512V Bipolar Input Range bias voltage is provided for single supply applications. The ■ Out-of-Range Indicator input PGA has a digitally selectable 1x or 2x gain. ■ True Differential Inputs with 75dB CMRR ■ Pin-Compatible 10Msps Version (LTC1420) Maximum DC specs include ±1LSB INL and ±1LSB DNL ■ 28-Pin Narrow SSOP Package over temperature. Outstanding AC performance includes
U
71.3dB S/(N + D) and 85dB SFDR at the Nyquist input fre-
APPLICATIO S
quency of 2.5MHz. ■ Telecommunications The unique differential input sample-and-hold can acquire ■ Digital Signal Processing single-ended or differential input signals up to its 100MHz ■ Multiplexed Data Acquisition Systems bandwidth. The 75dB common mode rejection allows users ■ High Speed Data Acquisition to eliminate ground loops and common mode noise by ■ Spectral Analysis measuring signals differentially from the source. A sepa- ■ Imaging Systems rate output logic supply allows direct connection to 3V components. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
U TYPICAL APPLICATION
5V 5V 5V OPTIONAL 3V LOGIC SUPPLY 1µF 1µF 1µF V V DD DD
Typical INL Curve
GAIN (PIN 7) (PIN 23) OVDD 1.00 +AIN 0.75 S/H PIPELINED 12-BIT ADC OF 0.50 –AIN D11 (MSB) 0.25 OUTPUT VCM BUFFERS 0 1µF MODE SELECT DIGITAL CORRECTION INL (LSBs) –0.25 LOGIC D0 (LSB) SENSE –0.50 2.5V 5MHz CLK –0.75 REFERENCE VREF –1.00 1µF 2.048V 0 1024 2048 3072 4096 CODE 1405 TA02 1405 TA01 V GND GND OGND SS GND 1µF (PIN 6) (PIN 8) (PIN 24) 0V OR –5V 1405fa 1